Sensor device, system and method for determining temperatures of different regions of skin

Abstract

Disclosed is a sensor device for determining temperatures of regions of a given body part, wherein the given body part is skin. The sensor device comprises a first layer with a first side and a second side opposite to the first side; a second layer arranged on the first side of the first layer, the second layer comprising at least one temperature-sensitive indicator; and a third layer covering the second layer. The sensor device is configured to determine temperatures of different regions of the given body part, when at least partially in contact with the different regions of the given body part, wherein the given body part is skin. Disclosed also are a system and a method for determining temperatures of a region of a given body part, wherein the given body part is skin.

Description

[0001] SENSOR. DEVICE, SYSTEM AND METHOD FOR DETERMINING TEMPERATURES OF DIFFERENT REGIONS OF SKIN TECHNICAL FIELD

[0002] THE PRESENT DISCLOSURE RELATES TO SENSOR DEVICES FOR DETERMINING TEMPERATURES OF REGIONS OF BODY PARTS, WHEREIN REGIONS OF BODY PARTS MAY BE REGIONS OF SKIN. MOREOVER, THE PRESENT DISCLOSURE RELATES TO SYSTEMS FOR DETERMINING TEMPERATURES OF REGIONS OF BODY PARTS, WHEREIN REGIONS OF BODY PARTS MAY BE REGIONS OF SKIN. FURTHERMORE, THE PRESENT DISCLOSURE RELATES TO METHODS FOR DETERMINING TEMPERATURES OF REGIONS OF BODY PARTS, WHEREIN REGIONS OF BODY PARTS MAY BE REGIONS OF SKIN. FURTHERMORE, THE PRESENT DISCLOSURE RELATES TO COMPUTER-READABLE STORAGE MEDIUMS COMPRISING SOFTWARE APPLICATIONS WHICH WHEN EXECUTED BY PROCESSING ARRANGEMENTS, CAUSE THE PROCESSING ARRANGEMENT TO EXECUTE STEPS OF METHODS.

[0003] BACKGROUND

[0004] The human body exhibits variations in temperature, with the core body temperature differing from that of peripheral parts such as the skin. These variations are primarily regulated by the distribution of heat from the body core to the skin's periphery. This heat transfer is facilitated by blood flow through the vascular system, resulting in distinctive surface temperature distributions. Several factors influence these temperature patterns, including blood flow in the surface skin layer, heat conduction from deeper blood vessels, and liquid evaporation from the skin's surface.

[0005] Presently, the detection and diagnosis of skin abnormalities and diseases, such as skin cancer, inflammation, infections, and musculoskeletal damage (e.g., muscle, tendon, and ligament injuries), typically requiretime-consuming, expensive, and potentially invasive clinical procedures. These procedures are designed to be conducted by clinically or medically trained practitioners and are predominantly suitable for clinical settings. They often involve physical examinations that may include manual probing for lumps and the subjective identification of areas of skin discolouration. Unfortunately, these traditional methods may not yield timely results, potentially allowing diseases to progress and spread.

[0006] Measuring and comparing the temperature of various skin regions can serve as a supplementary diagnostic tool for the early detection of skin abnormalities and diseases. Skin temperature can be influenced by factors such as environmental conditions, blood flow, and skin location. Consequently, the accuracy of measurements obtained with existing devices is reliant on the context and user-specific criteria, as they are relative to the individual operating the device.

[0007] Several patents and related technologies exist in the field of thermometry and temperature measurement, but they have notable limitations. US patent US4188437A (1978) relates to a thermotropic adhesive tape which changes colour in the presence of water or steam at an elevated temperature are provided which are useful as sterilization indicators. US patent US4524779 (Jun 25, 1985) relates to a device for detecting, measuring, and recording body thermal emissivity. In this regard, the device employs a flexible thermal responsive screen adapted to conform to the contour of the body with a coating of liquid crystals effective to transform thermal differentials emanating from the body to visible colour patterns. However, such devices require trained practitioners to operate which is associated with lack of privacy to the user.

[0008] Existing temperature sensing methodologies, such as thermography, also have their own limitations, particularly when employed in clinical settings. These limitations include the need for controlled examination room conditions, patient thermal acclimation, and potential interference fromexternal infrared sources. Furthermore, techniques like liquid crystal thermography and medical infrared thermography while providing valuable insights, have shortcomings related to time consumption, thermal sensitivity, and spatial resolution.

[0009] Therefore, in light of the foregoing discussion, there exists a need to overcome the aforementioned drawbacks.

[0010] SUMMARY

[0011] The object of the present disclosure is to provide a sensor device, a system and a method to determine temperatures of different regions of a given body part, wherein the given body part is skin, to identify a functional or structural abnormality associated therewith as defined in the appended independent claims. Advantageous features are set out in the appended dependent claims.

[0012] Throughout the description and claims of this specification, the words "comprise" , "include", "have", and "contain" and variations of these words, for example "comprising" and "comprises" , mean "including but not limited to" , and do not exclude other components, items, integers or steps not explicitly disclosed also to be present. Moreover, the singular encompasses the plural unless the context otherwise requires. In particular, where the indefinite article is used, the specification is to be understood as contemplating plurality as well as singularity, unless the context requires otherwise.

[0013] BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an illustration of a sensor device for determining temperatures of regions of a given body part, wherein a given body part is skin, in accordance with an embodiment of the present disclosure;FIG. 2 is an illustration of a system for determining temperatures of regions of a given body part, wherein a given body part is skin, in accordance with an embodiment of the present disclosure; and

[0014] FIG. 3 IS AN ILLUSTRATION OF A FLOWCHART DEPICTING STEPS OF A METHOD FOR DETERMINING TEMPERATURES OF REGIONS OF A GIVEN BODY PART, WHEREIN A GIVEN BODY PART IS SKIN, IN ACCORDANCE WITH AN EMBODIMENT OF THE PRESENT DISCLOSURE.

[0015] DETAILED DESCRIPTION OF EMBODIMENTS

[0016] The following detailed description illustrates embodiments of the present disclosure and ways in which they can be implemented. Although some modes of carrying out the present disclosure have been disclosed, those skilled in the art would recognise that other embodiments for carrying out or practising the present disclosure are also possible.

[0017] In a first aspect, the present disclosure provides a sensor device for determining temperatures of regions of a body part, the sensor device comprising:

[0018] a first layer with a first side and a second side opposite to the first side;

[0019] a second layer arranged on the first side of the first layer, the second layer comprising at least one temperature-sensitive indicator,

[0020] wherein a temperature-sensitive indicator comprises cholesteric liquid crystalline formulations,

[0021] wherein the cholesteric liquid crystalline formulations display colours corresponding to a temperature range, wherein the temperature range is 29-41°C, wherein colours remain following removal from the surface,a third layer covering the second layer,

[0022] wherein the third layer is configured to protect the second layer from environmental and mechanical impacts to maintain the integrity of the second layer,

[0023] wherein the sensor device is configured to determine temperatures of different regions of the given body part, when at least partially in contact with the different regions of the given body part.

[0024] The advantages of the disclosed sensor device are its ability to accurately determine and differentiate temperatures in various regions of a given body part, wherein the given body part is skin, its protective and durable layer configuration, user comfort during use, and its adaptability to different body parts.

[0025] In a second aspect, the present disclosure provides a system for determining temperatures of regions of a body part, the system comprising:

[0026] at least one sensor device according to the first aspect;

[0027] at least one camera configured to capture at least one image of the at least one sensor, wherein the at least one image is captured within a given time period; and

[0028] at least one processor communicably coupled to the at least one camera, wherein the at least one processor is configured to execute at least one software module to:

[0029] identify, in the at least one image, at least one image segment representing the at least one temperature-sensitive indicator of the at least one sensor device;

[0030] recognize pixel values of pixels in the at least one image segment; and

[0031] determine the temperatures of different regions of the body part, based on the pixel values of pixels in the at least one image segment to form a temperature profile of the given body part.Beneficially, the disclosed system has the ability to provide non-invasive, real-time, and comprehensive temperature profiling. The integration of sensor data and imaging, along with user-friendly features and adaptability, makes the system a valuable tool for monitoring and analysing temperature variations in different regions of the body, wherein different regions of the body may be different regions of skin.

[0032] In a third aspect, the present disclosure provides a method for determining temperatures of a region of a body part, wherein the body part is skin, the method comprising:

[0033] capturing at least one image of at least one sensor device, wherein the at least one image is captured within a given time period;

[0034] identifying, in the at least one image, at least one image segment representing at least one temperature-sensitive indicator of the at least one sensor device;

[0035] recognizing pixel values of pixels in the at least one image segment; and

[0036] determining the temperatures of different regions of the body part, based on the pixel values of pixels in the at least one image segment to form a temperature profile of the body part.

[0037] The method offers a non-invasive, efficient, and user-friendly approach to determine the temperature of different regions of a body part, wherein the body part is skin. Its integration with imaging technology and the capability to form a temperature profile make it a valuable tool for various applications in healthcare and research.

[0038] In a fourth aspect, the present disclosure provides a computer-readable storage medium comprising at least one software application comprising instructions for determining temperatures of regions of a body part, wherein the body part is skin, which when executed by a processing arrangement, causes the processing arrangement to execute steps of the aforementioned method of the third aspect.Throughout the present disclosure, the term "sensor device" as used herein refers to a temperature-sensing device. The sensor device is suitably designed to be placed against a given body part such that it at least partially covers the given body part. It will be appreciated that in this regard, the sensor device is in form of a patch or contoured to be accommodated on the given body part such that it covers a patch of skin for determining temperatures of one or more regions of the given body part, wherein the body part is skin.

[0039] It will be appreciated that teachings of the present disclosure are not limited to any particular body part. However, the at least one sensor device of the present disclosure can be implemented on any part of the body to detect any potential abnormalities based upon a temperature in that part. For example, when the sensor device is in contact with an area of skin of a given body part the temperature profile of the area may indicate a level of fatigue and / or a potential rupture of muscle in an underlying muscle. It may also indicate poor blood circulation, poor nerve function, inflammation or any other function that causes a local increase in temperature.

[0040] The sensor device can be in contact with the body part of the user for a predefined time period. In an instance, when the body part is the at least one breast, the predefined time period may lie in a range of 5 minutes to 30 minutes. The period of time may be lower, for example, 30 seconds, 1 minute, 2 minutes etc. It is sufficient for the contact of the sensor device with the given body part to be made for period of time that allows the sensor device to indicate a temperature higher than adjacent regions or areas of a given body part. This also applies wherein the give body part is wounded and therefore, the sensor device senses temperatures from any surface. For example, the sensor device senses temperatures of a wound dressing when the wound dressing is in contact with a body part.In another instance, when the body part is one of: the at least one portion of the skin, the at least one foot, the predefined time period may lie in a range of 5 minutes to 15 minutes. As an example, when the body part is one of: the at least one portion of the skin, the at least one foot, the predefined time period may be 10 minutes. In yet another instance, when the body part is the at least one testicle, the predefined time period may lie in a range of 5 minutes to 20 minutes. As an example, when the body part is the at least one testicle, the predefined time period may be 15 minutes.

[0041] The sensor device comprises a first layer with a first side and a second side opposite to the first side. The device may cover a patch of skin (i.e., a whole arm or leg or a part thereof). The sensor device may be available in a range of sizes. The first layer of the sensor device may be thin, it may have a low threshold of pressure and may be in a form of a circle, oval, rectangle, triangle. The first layer of the sensor device is not in contact with the skin and may display a logo, a marketing brand name or a design. In this regard, the first layer may be composed of a soft material that may be at least partially transparent (or at least partially translucent) to display the logo, the marketing brand name, the design.

[0042] The first layer of the sensor device does not cause a temperature change when touched. When in use, the temperature map can be viewed on the outer surface of the sensor device (i.e., on the surface not in contact with the skin) without the need of a camera or a processor. Thus, a professional, such as a doctor, nurse or technician does not need to apply a further processing step in order to interpret the result.

[0043] The material (such as cotton, a polymer or polyester) can be used that is soft, flexible, prevents rashes and has properties which makes the sensor device comfortable for the user to apply to the skin. The material could be foam-backed or in a silicon mould for added comfort. The material could be made of foil pads with a soft flexible foam backing. The firstlayer may be made of a flexible material that does not wrinkle, fold or break. The first layer may be made of a material made of a polymer substrate material which offers flexibility, thermal stability and chemical resistance. Examples of such polymer substrate material may include, but are not limited to, Biaxially Oriented Polypropylene (BOPP), Polyethylene Terephthalate (PET), polyethylene (PE), polyvinyl chloride (PVC), and Polyimide (PI).

[0044] Moreover, the sensor device comprises a second layer arranged on the first side of the first layer, the second layer comprising at least one temperature-sensitive indicator. The term "second layer" as used herein refers to a substrate layer with a thermochromic side. The term "temperature-sensitive indicator" as used herein refers to a film-based element comprising a thermochromic side and the third layer covering the thermochromic side. The thermochromic side of the second layer is a crucial component of the temperature-sensitive indicator, as it allows the sensor device to detect and display the temperatures of various regions of the user's skin. The at least one temperature-sensitive indicator, wherein the temperature sensitive indicator is a thermochromic film is designed to be at least partially in contact with the skin for the predefined time period to facilitate accurate measurement of temperature variations in different regions of the given body part.

[0045] Furthermore, the sensor device comprises a third layer covering the second layer. The term "third layer" as used herein refers to a protective layer that covers the second layer comprising the at least one temperature-sensitive indicator. The third layer typically protects the second layer from environmental and mechanical impacts to maintain the integrity of the second layer.

[0046] Moreover, the sensor device is configured to determine the differential temperature of different regions of the given body part, when at least partially in contact with the different regions of the given body part for apredefined time period. The term "differential temperature" as used herein refers to a temperature of a region of one body part that is different to the temperature of another region of the same body part. In this regard, when the given body part exhibits an abnormality or is diseased, the sensor device will detect a temperature that is higher in the abnormal / diseased region compared to a region of the same given body part that does not have an abnormality or disease. The reading will be indicated by colour and digitally processed to give the user an accurate result. It is advised that the sensor device is not used when the body temperature may be naturally elevated, for example following exercise or sunbathing. The sensor device may be a wireless device and comprising thermochromic liquid crystals or formulations that contain state-changing substances that display a colour corresponding to a particular temperature. When in use the device is in contact with the given body part. The colour change is visible on the thermochromic film which can be viewed through the transparent top layer of the device. An image of the colour map displayed on the thermochromic film first layer can be captured by a camera. The camera is communicably coupled to a processing unit (namely at least one processor) which assigns values to the pixels of the image and thus determines the temperature of the different regions of the given body parts. The results are processed and will be available to the user via a device specific software application. The body part may be an area of skin. In a particular embodiment, the temperature-sensitive device is designed to analyse temperature fluctuations across different regions of the skin, specifically within the same body part. This functionality aims to support clinical investigations and dermatological research. When applied to the external surface of the skin, the sensor device can effectively detect temperature variations in specific skin areas, allowing for the identification of abnormal heat patterns. Such variations in skin temperature may indicate underlying irregularities or abnormalities. The observed results can be convenientlyaccessed either directly on an external monitoring device or inputted into a mobile application or web platform for immediate and thorough analysis.

[0047] The sensor device presents a secure, non-invasive, and cost-effective method for regularly identifying skin abnormalities. Its utility extends to complementing established investigative procedures, including clinical skin examinations, thereby contributing to a more comprehensive approach to skin health assessment.

[0048] In an embodiment, the temperature-sensitive device determines the temperature variations across different regions of the skin of same body part to support clinical investigations and dermatological research. When placed on the external surface of the skin, this sensor device can identify temperatures in specific areas of skin thereby enabling the identification of abnormal heat patterns. Furthermore, variations in skin temperature may signify underlying irregularities. The observed results can be directly accessed on an external monitoring device or inputted into a mobile application or web platform for immediate and comprehensive analysis. The sensor device offers a secure, non-invasive, and cost-effective approach for routinely identifying skin abnormalities. It can be used alongside or to benefit established investigative procedures, including clinical skin examinations.

[0049] The at least one temperature-sensitive indicator may be a replaceable irreversible temperature indicator strip. The irreversible temperaturesensitive indicator strip can be moulded around the given body parts. The temperature-sensitive indicator may comprise at least one of:

[0050] a thermosensitive fluid selected from at least one of: a thermosensitive ink, a thermosensitive pigment, a thermosensitive wax melt;

[0051] a thermosensitive compound selected from at least one of: a crystalline organic compound, encapsulated cholesteric liquid crystals, IM-phenylbenzylamine, Bromo-p-Xylene, Tetradecanol, solid solutions of halogenated nitrobenzenes such as ortho-chlorinitrobenzene and orthobromonitrobenzene, or a thermochromic compounds, wherein cholesteric liquid crystalline formulations comprise cholesteric esters selected from at least one of: cholesteryl pelargonate, cholesteryl chloride, oleyl cholesteryl carbonate, and other colour changing compounds. The thermosensitive fluid could be, but not limited to, a thermosensitive ink or a thermosensitive pigment, or a thermosensitive wax melt (wax that changes its state (melts) at specific temperatures, possibly accompanied by a change in colour).

[0052] The temperature-sensitive element may be a thermochromic ink, which could be a dark colour, for example black, when the sensor device is not in use, provided that the ambient temperature is lower than or close to (for example, within 1°C) of the lower limit of the range of operation of the temperature-sensitive device. The temperature-sensitive element may be an irreversible temperature indicator, such as an adapted thermometric device with a memory feature that contains cholesteric liquid crystalline formulations that display a colour indicative of a defined temperature range. The irreversible temperature indicator may contain cholesteric liquid crystalline formulations that indicate when the maximum temperature (thermokinetic limit) of the given body part has been exceeded.

[0053] The thermosensitive compound could be a liquid substance, a powder substance or a solid substance, that undergoes changes in physical properties in a similar manner as the thermosensitive fluid. The thermosensitive compound could be, but not limited to, a crystalline organic compound, encapsulated cholesteric liquid crystals, N-phenylbenzylamine, Bromo-p-Xylene, Tetradecanol or a thermochromic compound.The temperature responsive substances may be solid solutions of halogenated nitrobenzenes such as ortho-chlorinitrobenzene and orthobromonitrobenzene. The second layer may change composition or physical state in response to heat. For instance, the second layer could change from an opaque solid to a translucent liquid which thereby allows the observation of the temperature. As an additive, the temperature responsive substance may contain an organic compound such as a dye (for example methyl violet), dibenzyl succinate, phenyl salicate and dibenzyl which is stable over long periods of time, soluble in the temperature responsive substance and responsive to a change in the physical state of said substance. The change in state corresponds to the known melting points of the temperature-responsive substances. Furthermore, the heat required for a change in state is minimal. Furthermore, certain organic compounds may have a lower melting point than the temperature-responsive substances with which they are combined and thus upon heating, the generation of additional liquid from an organic compound can facilitate the visual detection of the temperature corresponding to the change of state of the temperature-responsive substance. This decreases the time required for visual detection of the temperature of the region of the given body part.

[0054] When the organic compound is a dye, only dyes such as oil-soluble dyes that do not adversely affect the melting ranges of the temperature-responsive substances may be used. The detection of any colour may be enhanced by the addition of cationic surfactants such as fatty acid nitrogen derivatives, non-ionic surfactants such as polyethyleneoxy derivatives and anionic surfactants such as sodium salts of fatty acids and their esters, and compounds which react exothermically with the temperature responsive substances.

[0055] The temperature-sensitive substance could be liquid crystals comprising liquid crystal molecules, wherein the alignment of the liquid crystal molecules of the liquid crystal material changes based on differenttemperatures of different regions of the given body part. Liquid crystal materials which are highly sensitive to temperature changes are suitable for use. For example, the liquid crystal material may react to 0.1°C change in temperature.

[0056] The temperature-sensitive substance could be cholesteric liquid crystalline formulations that display a colour indicative of a defined temperature range. Cholesteric liquid crystals contain cholesteric esters such as cholesteryl pelargonate, cholesteryl chloride, oleyl cholesteryl carbonate, and all have colour-changing properties. For clarity, multiple, pre-defined cholesteric liquid crystalline formulations with different temperature and time-dependent properties, capable of transitioning into a glass state can be employed to display a temperature-dependent colour range. Once a cholesteric liquid crystalline formulation has changed into a glass state and a colour is displayed, then the original colour cannot be restored without inducing the formulation to change back to a liquid state. Cholesteric liquid crystalline formulations can be employed that indicate when the maximum temperature (thermokinetic limit) of the given body part has been exceeded, the term thermokinetic limit refers to a function of temperature and time and relates to the highest temperature at which the cholesteric liquid crystalline formulations will decompose and change their physical state and thus display a colour within the temperaturesensitive indicator device. Each cholesteric liquid crystalline formulation will have its own maximum temperature, known as the glass-transition temperature range. Depending on the temperature threshold of each of the cholesteric liquid crystalline formulations, the physical state of the liquid crystals will change to either a pseudo-irreversible or irreversible phase of the glass phase.

[0057] The second layer could be an adapted thermometer where a change in temperature of a thermally responsive material or temperature responsive substance (for example solid solutions of halogenatednitrobenzenes, or an organic compound that is easy to manufacture and is able to change its physical state) within the thermometer device can be reversible or irreversible. The thermometer device will have one or more region which contains one or more temperature responsive substance. The outside carrier of the temperature responsive substance is made from a heat conducting material (such as aluminium or alloys thereof, copper, silver, gold, stainless steel or other heat-conductive materials) to allow rapid heat transfer from the area of the given body part to the temperature responsive substance and provide uniform temperature distribution throughout the thermometer when placed on a given area of the given body part. The outside carrier of the temperature responsive substance must have a relatively large surface area of contact with the region of the given body part and must be of a minimum thickness, but of a thickness that is adequate to preserve the structural integrity to allow rapid conduction of heat into the temperature responsive substance. The second layer can be a thermometer as outlined above which is disposable.

[0058] The at least one temperature-sensitive indicator may further comprise at least one of:

[0059] an organic dye selected from methyl violet, dibenzyl succinate, phenyl salicate and dibenzyl;

[0060] a surfactant selected from cationic surfactants including fatty acid nitrogen derivatives, non-ionic surfactants including polyethyleneoxy derivatives, and anionic surfactants including sodium salts of fatty acids and their esters; and

[0061] exothermic compounds.

[0062] The use of organic dyes and surfactants can contribute to improved colour changes and visibility in the indicator. This enhancement in visibility ensures that temperature variations are easily distinguishable, leading to more accurate and user-friendly temperature assessments.Surfactants may influence the properties of the temperature-sensitive material, aiding in its response to temperature changes. Additionally, the temperature-sensitive indicator may incorporate exothermic compounds. These compounds release heat during chemical reactions, potentially contributing to the overall temperature-sensitive response and facilitating the detection of temperature variations. These elements contribute to the overall effectiveness of the sensor device in capturing and indicating temperature variations on the user's body.

[0063] In this context, it is emphasized that the sensor device is designed for reusability and is not intended for disposable use. The device exhibits resilience against mild soap solutions and medical-grade detergents. This feature ensures that the sensor device can undergo easy cleaning, enabling it to be reused multiple times while maintaining its functionality. The at least one temperature-sensitive layer is sensitive for a temperature range from 29-41°C. Optionally, the at least one temperature-sensitive layer is sensitive for a temperature range from 29°C, 30°C, 35°C 40°C or 41°C

[0064] The sensor device may further comprise a fourth layer provided on the second side of the first layer, wherein the fourth layer comprises a unique identifier. The fourth layer typically refers to an identification layer that comprises a unique identifier. The unique identifier could be any of a quick response (QR) code, an alphanumeric code, a Radio Frequency Identification (RFID) marker or a noise pattern. The camera captures the image to be labelled with a unique identifier. The image labelled with the unique identifier is received by the processor via the communication network. It may be appreciated that the user may be registered with a given unique identifier for future uses of the device to maintain, for example, in a database, the temperature data of the user to identify the progression of a medical condition being studied.The sensor device may further comprise

[0065] a fifth layer arranged on the third layer, wherein the fifth layer is arranged to contact the different regions of the body; and

[0066] a sixth layer arranged on the second side of the first layer, wherein the sixth layer is at least partially transparent to enable imaging of:

[0067] the second layer through the second side of the first layer; and the unique identifier of the fourth layer.

[0068] Additionally, a fifth Layer is positioned on the third layer, is designed to come into contact with various regions of the user's body. Herein, the term "fifth layer" refers to a contact layer that contacts the body part. The contact layer is typically biocompatible to ensure no allergies or discomfort to the body part contacted thereby. Optionally, the contact layer may have a peelable outer layer that protects the contact layer from contacting surfaces for which the sensor device is not intended for use (such as the body parts other than the given body part, packaging, storage aids and any non-human organisms) and to prevent debris (such as air borne components such as dust and fibres and non-visible and microscopic entities such as bacteria and viruses) sticking to the surface when not in use.

[0069] The sixth layer is located on the second side of the first layer and possesses at least partial transparency. This transparency serves a dual purpose: It allows imaging of the second layer through the second side of the first layer. This is essential for capturing temperature-sensitive information from different regions of the body. It facilitates imaging of the unique identifier on the fourth layer. The transparency of the sixth layer enables the camera or imaging device to capture the unique identifier, which may be a QR code, alphanumeric code, RFID marker, or noise pattern, as mentioned in the context of the invention.

[0070] These additional layers enhance the functionality of the sensor device, enabling it to establish contact with various body regions for temperaturesensing while simultaneously allowing for imaging of relevant identifiers and temperature-sensitive layers. This contributes to the device's comprehensive capability in capturing, categorising, and processing data related to body temperature variations.

[0071] Contact between the at least one temperature-sensitive indicator and the region of the body is made by an adhesive or non-adhesive means. Wherein the contact layer is implemented as an adhesive layer, the surface in contact with the given body part may have a non-harmful adhesive outer layer. The non-harmful adhesive outer layer may be composed of an acrylic or silicon compound. The adhesive layer may be cleaned with a water and soap solution or the medical grade detergent after use and will remain adhesive to allow for re-use.

[0072] Alternatively, a non-harmful adhesive layer may be applied to the surface of the given body part to allow the device to stick to the surface of the given body part. Examples may include, but are not limited to, a medical grade adhesive, a liquid bandage adhesive, and an acrylic adhesive. The device may feature a non-adhesive but non-slip outer layer, enhancing secure and direct contact with the outer skin layer of the given body part. This non-adhesive, non-slip outer layer may be composed of materials like rubber or PVC foam. Furthermore, this outer layer is designed to be easily cleaned with a water and soap solution or medicalgrade detergent after use allowing for safe re-use.

[0073] Additionally, the adhesive layer and the non-adhesive may incorporate a peelable layer. This layer serves a dual purpose: it protects the adhesive layer and the non-adhesive from unintended sticking to surfaces not intended for use (e.g., body parts other than the designated area, packaging, storage aids, and any non-human organisms), and it prevents the accumulation of debris, including airborne components like dust andfibers, as well as non-visible entities such as bacteria and viruses, when the device is not in use.

[0074] The sensor device can be held in place on the given body part.

[0075] The present disclosure also relates to the system as described above. Various embodiments and variants disclosed above, with respect to the aforementioned sensor device, apply mutatis mutandis to the system. The term "at least one camera" as used herein refers to an electronic device that is used to capture an image of the second layer. The camera could be a Red-Green-Blue (RGB) camera or a grayscale camera. The at least one image (namely, one or more images) may be captured within the given time period which may lie in a range of 0-15 minutes. The given time period is determined based upon the temperature-sensitive material used in the sensor device. It will be appreciated that the at least one camera, communicably coupled to the at least one processor, that is able to execute a software application could be embodied through a singular device, for example, a user's camera smartphone and the like.

[0076] The term "at least one processor" as used herein refers to a computational element that is operable to respond to and process instructions. The at least one processor, in operation, implements the method for determining the temperature in the body part. Furthermore, the term "processor" may refer to one or more individual processors, processing devices and various elements associated with a processing device that may be shared by other processing devices. Such processors, processing devices and elements may be arranged in various architectures for responding to and executing the steps of the temperature measurement method.

[0077] The processor implements the method for determining the differences in temperature of regions of the given body part. The processor identifies,the image segment representing the temperature-sensitive element and analyses it for variations in colour (i.e., a colour gradient). The processor identifies the image segment by employing an image processing algorithm. A given image processing algorithm could be an object identification algorithm or a feature detection algorithm. Post image segment identification, the processor is configured to recognise pixel values of pixels in the image segment. The colour information may be indicative of the colour gradient, which may be predefined and calibrated for differences in temperature of the given body part. Calibration can depend on the temperature-sensitive material or the thickness of the first layer. The colour information may be expressed as Red-Green-Blue (RGB) colour component values, grayscale values, or similar.

[0078] The processor is communicably coupled to the camera and could receive the image from the camera as a video, image or live stream. Preferably, the processor is communicatively coupled to the camera via a communication network. The communication network may be wired, wireless, or a combination thereof. The communication network could be an individual network or a combination of multiple networks. Examples of the communication network may include, but are not limited to, the Internet, a local network (such as, a TCP / IP-based network, an Ethernetbased local area network, an Ethernet-based personal area network, a Wi-Fi network, and the like), Wide Area Networks (WANs), Metropolitan Area Networks (MANs), a telecommunication network, and a short-range radio network (such as Bluetooth®)

[0079] The temperature-sensitive element exhibits a colour upon contact of the device with the given body part. The camera takes an image and feeds this to the processing unit to assign a temperature measurement to the colours displayed across said region.

[0080] The processor is configured to execute a software application for implementing the processing task through a singular device, such as theuser's smartphone. The software application could be a single software application or multiple software applications. The software application may be implemented as an application for a mobile device such as, but not limited to, a smartphone. The software application reads and interprets results from the image taken by the camera in the sensor device. The image captured has pixels of varying pixel values. Such interpretation may be made via the comparison of the value (i.e., the colour) of a particular pixel or groups of pixels in the image with the expected pixel value (i.e., colour) that represents the temperature of the given body part. Such interpretation can be made by mapping each pixel of the image to identify its value and based on the calibration of the temperature-sensitive material, the corresponding temperature of a particular pixel value is retrieved by virtue of the corresponding colour. The temperature which corresponds to the pixel value is assigned, creating a map of the temperature distribution of the given body part in contact with the temperature-sensitive device.

[0081] The software identifies lower and higher temperature boundaries within a region by reading the corresponding pixel values within a given range. The temperature threshold value could lie in a range of 35°C to 38°C. For example, values with a temperature difference lower than a fraction of a degree Celsius, but not including 0°C (for example, 0.25°C, 0.5°C, 0.75°C), or values up to but not including 2°C (for example 1.25°C, 1.5°C, 1.75°C) may be considered lower and higher temperature boundaries within the same region. This depends on a previous calibration of the software. Such calibration may be added as a strip adhered to the sensor device (for example adhered by glue) or directly printed on to the device (for example at an edge). Once the different temperature thresholds of the regions of the given body part are established, the software can indicate whether a region within the given body part is of a higher temperature, and therefore is an indication of a potential anomaly. For example, this may be a region of a relativelyhigher concentration of pixels in a colour map (i.e., temperature map) with a relative temperature difference from neighbouring regions of 1°C or 1.5°C.

[0082] The at least one processor may be further configured to:

[0083] determine whether a temperature of said region exceeds a predefined temperature threshold value for each region amongst the different regions of the given body part; and

[0084] generate a thermal map of the given body part based on the temperature profile of the given body part, wherein the thermal map indicates any region whose temperature exceeds the predefined temperature threshold value.

[0085] Herein, the term "differential temperature profile" refers to a detailed analysis of temperature variations across different regions or points within that specific body part. This kind of analysis is often conducted using thermal imaging technology or other temperature-sensing devices. The term "thermal map" is a representation of the temperature distribution over a specific area, herein one or more regions of a given body part. The thermal map could represent the temperature profile of different regions of the given body part. The thermal map could be a colour map or a grayscale map. A technical benefit of a thermal map is that the results generated by the sensor device are presented in a form, which can be accurately read and understood. Such maps are created using thermal imaging technology, which detects infrared radiation emitted by objects based on their temperature. Typically, the thermal maps are generated by using devices such as thermal cameras or infrared sensors, i.e., the devices that detect the infrared radiation emitted by surfaces and convert it into temperature data. The temperature data collected is then translated into a visual representation, often using a colour scale. Warmer temperatures are typically represented by warmer colours (such as red and yellow), while cooler temperatures arerepresented by cooler colours (such as blue and green). Beneficially, in medical imaging, identifying abnormal temperature patterns in the human body aids in associating the regions with abnormal temperature patterns with a potential medical condition.

[0086] The predefined temperature threshold value in terms of body temperature is a reference point or limit beyond which a person's body temperature is considered abnormal. Body temperature is a critical physiological parameter, and deviations from the normal range can indicate various health conditions, including fever or hypothermia. The threshold values can vary depending on the method of temperature measurement (e.g., oral, rectal, tympanic, or forehead), the age of the individual, and other factors. Notably, the normal temperature of skin, like other parts of the body, can vary, and it's typically slightly lower than the core body temperature.

[0087] The processor has the capability to assess each region of the specific body part. For each of these regions, it determines whether the temperature surpasses a predefined threshold value, i.e., 35°C to 38°C. Based on the temperature differences across various regions of the specified body part, the processor is further capable of producing a visual representation known as a thermal map. This map highlights any region where the temperature exceeds the predefined threshold value. Essentially, it provides a visual guide indicating areas that might have temperatures beyond the established limit.

[0088] The system may further comprise at least one user device communicably coupled to the at least one processor, wherein the at least one processor is further configured to send, to the at least one user device, at least one of: the temperatures of different regions of the given body part, and a thermal map of the given body part for presentation on the at least one user device. In this regard, a user interface (UI) is rendered on the display of the user device such that the user can easily and accuratelyview the results. Examples of a given user device include, but are not limited to, a smartphone, a smartwatch, a tablet computer, a laptop computer, a desktop computer, an infotainment device, and a personal digital assistant. On the III rendered on the display of the user device, the temperatures of the different regions of the given body part may be represented in the form of a table, a histogram, a schematic and / or a heat map.

[0089] The processor may also be further configured to determine whether a temperature of the given region of the given body part exceeds the predefined temperature threshold value amongst the different regions of the given body part and generate the thermal map of the given body part. The thermal map may therefore indicate any region whose temperature exceeds the predefined temperature threshold value and this could indicate an abnormality.

[0090] The utilisation of the sensor device requires adherence to specific instructions to ensure accurate measurements. These instructions encompass the proper removal of packaging, adherence to the specified operating temperature, correct placement of the sensor device on the designated body part (including instructions on holding the sensor device during operation), recommendations for the optimal body posture during usage, and instructions for the safe removal of the sensor device after use. These instructions are essential for obtaining precise and reliable measurements.

[0091] The sensor device may incorporate a digital display capable of presenting operational instructions. The operational temperature range of the sensor device is influenced by the thermal sensitivity range of the temperaturesensitive material. Specifically, the recommended operating temperature for the sensor device may fall within the range of 29°C to 41°C.To ensure the predetermined efficiency of the sensor device, users may receive instructions to store the device in a refrigerator or at a room temperature below 26°C. This storage guidance includes keeping the device away from any heat sources, including lights that generate heat, to optimize the performance of the temperature-sensitive material. The recommended temperature range for storing the sensor device, critical for maintaining its optimal performance, is stored in the device's memory. This predefined temperature range typically falls between 4°C and 12°C. The at least one camera may be configured to capture at least one identification image representing a unique identifier of a fourth layer of the at least one sensor, wherein the at least one processor is configured to:

[0092] identify the unique identifier in the at least one identification image; associate the temperatures of different regions of the given body part that are determined to the unique identifier; and

[0093] perform one of: block future interpretation of sensed temperatures from the at least one sensor device, permit future interpretation of sensed temperatures from the at least one sensor device upon successful reuse actions being implemented.

[0094] The at least one camera may be configured to capture an image representing the unique identifier, wherein the processor may be configured to identify the unique identifier in the image, associate the temperatures of different regions of the given body part that are assigned to the unique identifier.

[0095] As an example, the unique identifier is identifiable through the first side of the first layer of the sensor device. The unique identifier could be any of a quick response (QR) code, an alphanumeric code, a Radio Frequency Identification (RFID) marker, a noise pattern, and the like. The at least one camera captures the at least one identification image. The at least one identification image includes the unique identifier. The at least oneidentification image is received by the at least one processor via the communication network. The at least one processor identifies the at least one identification image using at least one feature recognition algorithm. Such feature recognition algorithms are well-known in the art.

[0096] Further, the at least one processor associates the unique identifier on the at least one sensor device with the temperatures of different regions of the skin determined using the at least one sensor device. The at least one processor may also record uses of the unique identifier which is essential to determine the number of uses of the at least one sensor device. The unique identifier could also be used to ensure a condition of the at least one sensor device prior to use. For example, the unique identifier may be used to ensure the at least one device is working properly.

[0097] Furthermore, the at least one processor may be configured to block future interpretation of the sensed temperatures from the at least one sensor device. The at least one processor can only interpret temperatures of different regions of the body part which are associated with the unique identifier. Further, the at least one processor permits future interpretation of sensed temperatures from the at least one sensor device upon successful reuse actions being performed. The reuse actions could be performed by the user, for example, after a reuse action of replacing the unique identifier with another one. The at least one processor may associate the sensed data with a new unique identifier and allow interpretation of the temperatures. The at least one processor may allow reuse of the at least one sensor device only after a reuse action of a predefined check or confirmations is / are made by the user. In this regard, the at least one processor could prompt the user to provide any input value to enable another use of the at least one sensor device. As an example, the input value may be an ambient temperature of a place where the at least one sensor is being used. In case, the ambienttemperature is less than 25°C, reuse may be permitted owing to fewer chances of user perspiration. In a case wherein the previous temperatures of any region of the body part are not above the temperature threshold value, the reuse may be allowed, as the at least one temperature-sensitive element will not be impacted and the accuracy of the future detection of temperatures is sustained. The technical benefit of this is that the unique identifier on the at least one sensor device is associated with the measurement obtained using the at least one sensor device. The association of the measurements with the unique identifier prevents future interpretation using the at least one sensor device, thereby solving the problem of multiple uses of conventional systems. Multiple uses might significantly decrease the accuracy of the results. Therefore, the at least one sensor device may be restricted to single-use only until certain checks are provided by the user. Owing to the above, the accuracy of the system is significantly improved.

[0098] The at least one processor may be further configured to process the at least one identification image to:

[0099] determine at least one usage parameter associated with the use of the at least one sensor device, wherein the at least one usage parameter is selected from at least one of: a given body part for use, a total number of uses, a number of current uses, a remaining number of uses, a predefined temperature range for storing the at least one sensor device when not in use, a time period of use; and

[0100] associate the at least one usage parameter to the unique identifier. The at least one identification image may be used to identify details regarding the at least one sensor device prior to usage. A technical effect of determining the at least one usage parameter is that a detailed information about the at least one sensor device is provided to the user, so that the user can make an informed decision regarding usage of the at least one sensor device. The at least one identification image isprocessed in real time or in near-real time. Herein, the at least one sensor device may be designed based on the body part with which said at least one sensor device is to be in contact. Hence, the at least one identification image is processed to extract information regarding the body part for which the at least one sensor device is to be used and provide said information to the user regarding the body part in a form of a text, a code, a number, an alphanumeric text, or an image.

[0101] Upon processing the at least one identification image, historical data may be provided in the form of the number of times the at least one sensor device has been used, and the total number of times the at least one sensor device can be used. Herein, the number of times, the remaining number of times, and the total number of times are finite numeric values, wherein the total number of times is used as a reference value. The remaining number of times is a difference between the number of times the at least one sensor device has been used and the total number of times the at least one sensor device can be used. For example, the total number of times the at least one sensor device may be used for is 4 times. The number of times the at least one sensor device has already been used for may be 3 times. Hence, the remaining number of times for the future use of the at least one sensor device is 1 time.

[0102] Additionally, upon processing the at least one identification image, the predefined temperature range for storing the at least one sensor device is provided, when not in use, such that a performance of the at least one sensor device does not deteriorate. The predefined temperature range could lie in a range of 4°C to 12°C. The predefined temperature range lies in a range of 4°C to 6°C, 4°C to 8°C, 4°C to 10°C, 4°C to 12°C, 6°C to 8°C, 6°C to 10°C, 6°C to 12°C, 8°C to 10°C, 8°C to 12°C, 10°C to 12°C, or similar. Additionally, the term "time period" refers to a period of time after which the at least one sensor device expires, i.e., an accuracy with which the at least one sensor device determines the temperature ofthe body part reduces. Herein, the time period may be a month, 2 months, 4 months, 8 months, 12 months, 24 months, and similar.

[0103] The at least one processor may connect or link the unique identifier with the at least one usage parameter. The at least one processor may be further configured to send, to the at least one user device, the at least one usage parameter, for presentation on the at least one user device. The at least one camera is configured to capture at least one given body part image of the user, wherein the at least one processor is further configured to:

[0104] identify features of the given body part that are represented in the at least one body image;

[0105] digitally superimpose at least one virtual object on the at least one given body part image for enabling correct placement of the at least one sensor device on the given body part; and

[0106] send the at least one given body part image having the at least one virtual object superimposed thereon to the at least one user device for display thereat.

[0107] In this regard, the features of the given body part could be edges, shapes, sizes, colours of different regions, or the like. The at least one processor may be configured to identify the features of the body part that are represented in the at least one body image using at least one feature detection algorithm. A given feature detection algorithm may be at least one of: an edge-detection algorithm, a corner-detection algorithm, a blob-detection algorithm, a feature descriptor algorithm. Further, the at least one processor may be configured to digitally superimpose the virtual object on the different regions of the at least one body image, as required. The virtual object is a computer-generated object used to indicate different features of the body part that are represented in the at least one body image. The virtual object could be a geometric shape, an arrow, a pattern, or similar, that enables correct placement of the at leastone sensor device on the body part. As another example, the virtual object may be a circle encircling an outer region of the body part. The at least one body image superimposed with the virtual object is an augmented reality image. Further, the at least one processor sends the at least one augmented reality image to the user device in order to be displayed to the user. The technical benefit of this is that the augmented reality image is utilised to provide accurate positioning of the at least one sensor device on the body part thereby improving the efficiency and accuracy of the results.

[0108] The at least one processor may be configured to: for different regions of a given body part, compare a first temperature of a first region with a second temperature of a second region to determine a temperature difference therebetween.

[0109] The at least one processor may be further configured to determine whether the temperature difference exceeds a predefined difference and to indicate a possibility of an abnormality being present. The predefined difference could lie in a range of 0.5 to 2.5°C. The predefined difference could lie in a range of 0.5 to 1°C, 0.5 to 1.5°C, 0.5 to 2°C, 0.75 to 1.5°C, 0.75 to 2°C, 0.75 to 2.5°C, 1 to 1.5°C, 1 to 2°C, 1.5 to 2°C, 1.5 to 2.5°C or similar. In an example, the temperature difference between two regions of each of the body part may be equal to or greater than 2°C, which may relate to a condition of abnormality in the body part. The technical benefit of this is that the at least one sensor device is able to detect the abnormality accurately.

[0110] It will be appreciated that the system can be efficiently used by users of all ages. The system can use the software application to measure the different temperatures of regions of the given body part. The system can transmit the temperature from the given body part region to the software application. The software application significantly increases the accuracy and consistency of measurements obtained using the sensor device andprovides an interactive and / or easy to use platform for the user to view results. A mobile phone equipped with the camera can be used to read the temperatures of different regions of the given body part by taking a picture of the second layer. The mobile phone may also allow the user to view the temperatures determined upon processing. Optionally, the processor of the user's device may be employed for the processing. In such a case, a single user's device may be beneficially used for implementing the camera as well as the processor of the system. The technical advantage of this is that the results obtained by the system can be efficiently captured and viewed using the user's device making the system of the present disclosure very compact and easy to use.

[0111] The processor of the sensor device may associate the unique identifiers with the temperatures of different regions of the given body part. The processor can also record the uses of the unique identifier. The unique identifier could also be used to ensure a condition of the sensor device prior to use. The processor can only interpret temperatures of different regions of the given body part which are associated with the unique identifier. Further, the processor permits future interpretation of sensed temperatures upon successful reuse actions being performed. The reuse actions could be performed by the user. The processor may associate data with a new unique identifier and allow interpretation of the temperatures. The processor may allow the reuse of the sensor device only after a reuse action of a predefined check or confirmations is / are made by the user. The unique identifier on the sensor device is associated with the measurement obtained using the sensor device.

[0112] The processor may be further configured to process an image labelled with a unique identifier to determine the usage parameters, wherein the usage parameters include the number of times the sensor device has been used, the remaining number of times that the sensor device may be used, the total number of times the sensor device can be used, thepredefined temperature range for storing the sensor device when not in use, the time period within which the sensor device can be used, and associate the usage parameter with the unique identifier. The processor may provide historical data to the user in the form of the number of times the sensor device has been used, and the total number of times that the sensor device can be used.

[0113] From the image taken of the given body part, the processor may be configured to identify features of the given body part, digitally superimpose a virtual object on the image of the given body part to enable correct placement of the sensor device on the given body part and send the given body part image with the virtual object superimposed thereon to a user device for display.

[0114] The present disclosure also relates to the method as described above. Various embodiments and variants disclosed above, with respect to the aforementioned sensor device and the aforementioned system, apply mutatis mutandis to the method.

[0115] The method further comprises:

[0116] determining whether a temperature of said region exceeds a predefined temperature threshold value for each region amongst the different regions of the given body part; and

[0117] generating a thermal map of the given body part based on the temperature profile of the given body part, wherein the thermal map indicates any region whose temperature exceeds the predefined temperature threshold value.

[0118] The present disclosure also relates to the computer-readable storage medium as described above. Various embodiments and variants disclosed above, with respect to the aforementioned sensor device, the aforementioned system and, the aforementioned method, apply mutatis mutandis to the computer-readable storage medium.The term "computer-readable storage medium" as used herein refers to a non-transitory machine-readable data storage medium upon which a software product comprising program instructions are stored. Examples of the non-transitory machine-readable data storage medium includes, but are not limited to, an electronic storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), a static random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a digital versatile disk, a memory stick, a floppy disk, a mechanically encoded device such as punch-cards or raised structures in a groove having instructions recorded thereon, or any suitable combination thereof.

[0119] The program instructions stored on the non-transitory machine-readable data storage medium can direct the processing device to function in a particular manner, such that the processing device executes processing steps for remotely monitoring a plurality of sub-systems.

[0120] The term "processing arrangement" as used herein refers to a device that is capable of processing the program instructions of the computer program product. The processing device may be implemented as a part of the at least one user device. The processing device may, for example, be a microprocessor, a microcontroller, a processing unit, or similar. Notably the processing arrangement may be the processor of the system (as described above) or associated with an external device communicably coupled to the system.

[0121] DETAILED DESCRIPTION OF THE DRAWINGS

[0122] Referring to FIG. 1, illustrated is a sensor device 100 for determining temperatures of different regions of a given body part, wherein the given body part is skin, in accordance with an embodiment of the presentdisclosure. The sensor device 100 comprises the first layer 102 with a first side and a second side opposite to the first side; a second layer 104 arranged on the first side of the first layer 102, the second layer 104 comprising at least one temperature-sensitive indicator; and a third layer 106 covering the second layer 104, wherein the sensor device 100 is configured to determine the temperatures of different regions of the given body part when at least partially in contact with the different regions of the given body part, wherein the body part is skin.

[0123] Referring to FIG. 2, illustrated is a system 200 for determining temperatures in different regions of a given body part, wherein the body part is skin, in accordance with an embodiment of the present disclosure. As shown, the system 200 comprises at least one sensor device (depicted as a sensor device 202), at least one camera (depicted as a camera 204), and at least one processor (depicted as a processor 206). The processor 206 is communicatively coupled to the camera 204 via a communication network 208. The camera 204 is configured to capture at least one image of the at least one sensor 202, wherein the at least one image is captured within a given time period; and the processor 206 is configured to execute at least one software module to: identify, in the at least one image, at least one image segment representing the at least one temperature-sensitive indicator of the at least one sensor device 202; recognize pixel values of pixels in the at least one image segment; and determine temperatures of different regions of the body part, based on the pixel values of pixels in the at least one image segment to form a temperature profile of the given body part.

[0124] Referring to FIG. 3, is an illustration of a flowchart 300 depicting steps of a method for determining temperatures in a body part, wherein the body part is skin, in accordance with an embodiment of the present disclosure. At step 302, at least one image of at least one sensor deviceis captured within a given time period. At step 304, in the at least one image, an image segment representing at least one temperaturesensitive element of the at least one sensor device is identified. At step 306, pixel values of pixels in the at least one image segment are recognized. At step 308, temperatures of different regions of the body part are determined, based on the pixel values of pixels in the at least one image segment, the temperatures of different regions of the body part form a temperature profile of the body part.

Claims

CLAIMS1. A sensor device for determining temperatures of different regions of a given body part, the sensor device comprising:a first layer with a first side and a second side opposite to the first side;a second layer arranged on the first side of the first layer, the second layer comprising at least one temperature-sensitive indicator,wherein a temperature-sensitive indicator comprises cholesteric liquid crystalline formulations,wherein the cholesteric liquid crystalline formulations display colours corresponding to a temperature range, wherein the temperature range is 29-41°C, wherein colours remain following removal from the surface,a third layer covering the second layer,wherein the third layer is configured to protect the second layer from environmental and mechanical impacts to maintain the integrity of the second layer,wherein the sensor device is configured to determine temperatures of different regions of the given body part, when at least partially in contact with the different regions of the given body part.

2. A sensor device according to claim 1, wherein the contact is made to the region of the body by an adhesive or non-adhesive means.

3. A sensor device according to any of the preceding claims, wherein the second side of the first layer does not cause a temperature change when touched or in contact with an external heat source.

4. A sensor device according to any of the preceding claims, wherein the cholesteric liquid crystalline formulations display colours that remain for up to 120 seconds following removal of the sensor device from the given body part.

5. A sensor device according to any of the preceding claims, further comprising a fourth layer provided on the second side of the first layer, wherein the fourth layer comprises a unique identifier.

6. A sensor device according to any of the preceding claims, wherein the region of the body part is skin.

7. A system for determining temperatures of different regions of a body part, the system comprising:at least one sensor device according to claims 1-6;at least one camera configured to capture at least one image of the at least one sensor, wherein the at least one image is captured within a given time; andat least one processor communicably coupled to the at least one camera, wherein the at least one processor is configured to execute at least one software module to:identify, in the at least one image, at least one image segment representing the at least one temperature-sensitive indicator of the at least one sensor device;recognize pixel values of pixels in the at least one image segment;determine the temperatures of different regions of the body part, based on the pixel values of pixels in the at least one image segment to form a temperature profile of the given body part;generate a thermal map of the given body part based on the temperature profile of the given body part, wherein thethermal map indicates any region whose temperature exceeds the predefined temperature threshold value; and send, to the at least one user device, at least one of: the temperatures of different regions of the given body part and a thermal map of the given body part for presentation on the at least one user device.

8. A system according to claim 7, wherein the at least one camera being configured to capture at least one identification image representing a unique identifier of a fourth layer of the at least one sensor, wherein the at least one processor is configured to:identify the unique identifier in the at least one identification image; andassociate the temperatures of different regions of the given body part with the unique identifier.

9. A system according to claim 7, wherein the at least one processor is further configured to process the at least one identification image to:determine at least one usage parameter associated with the use of the at least one sensor device, wherein the at least one usage parameter is selected from at least one of: a given body part for use, a total number of uses, a number of current uses, a remaining number of uses, a predefined temperature range for storing the at least one sensor device when not in use, a time period of use; and associate the at least one usage parameter with the unique identifier.

10. A system according to any of the claims 7 to 9, wherein the at least one camera is configured to capture at least one given body part image of the user, wherein the at least one processor is further configured to:identify features of the given body part that are represented in the at least one body image;digitally superimpose at least one virtual object on the at least one given body part image for enabling correct placement of the at least one sensor device on the given body part; andsend the at least one given body part image having the at least one virtual object superimposed thereon to the at least one user device for display thereat.

11. A method for determining temperature of different regions of a body part, the method comprising:capturing at least one image of at least one sensor device, wherein the at least one image is captured within a given time period; identifying, in the at least one image, at least one image segment representing at least one temperature-sensitive indicator of the at least one sensor device;recognizing pixel values of pixels in the at least one image segment; anddetermining the temperatures of different regions of the body part, based on the pixel values of pixels in the at least one image segment to form a temperature profile of the body part.

12. A computer-readable storage medium comprising at least one software application comprising instructions for determining temperatures of different regions of a body part, which when executed by a processing arrangement, causes the processing arrangement to execute steps of a method of claim 11.

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