Auxiliary step device and scanning application method of PET / SPECT / CT equipment

Abstract

The present invention provides an auxiliary ladder device and scanning application method for PET / SPECT / CT equipment, including: the ladder steps are used to assist patients to get on the bed; the connecting rod is provided with an ultrasonic sensor, and the ladder steps are provided with a stress sheet and a display screen; the control module uses a microcontroller STM32 series single-chip microcomputer combined with an HX711 weight sensor, an HC-SR04 ultrasonic sensor and an LCD1602 display screen to form a minimum unit subsystem for weighing and ranging, which is integrated into the inside of the ladder steps, receives the signals of the ultrasonic sensor and the stress sheet and converts them into height and weight information, which solves the problem that the hospital technician manually inputs the body shape information orally stated by the subject, which is not accurate and convenient enough. In addition, the present invention automatically calculates the reference value of the injection nuclide dose before the test by accurately measuring and uploading the patient's current body shape information, assisting the technician to better control the nuclide injection dose, and can accurately calculate the standard uptake value SUV, which provides more reliable data support for the later doctors to diagnose the differentiation of benign and malignant tumors and the evaluation of therapeutic effects.

Description

Technical Field

[0001] The present invention relates to the technical field of medical auxiliary equipment and scanning application methods thereof, and in particular to an auxiliary step device of PET / SPECT / CT equipment and a scanning application method thereof. Background Art

[0002] In the current field of medical imaging diagnosis, equipment such as PET (positron emission tomography), SPECT (single photon emission computed tomography) and CT (computed tomography) play a vital role. Before these devices are used for examination, patients are usually required to provide relatively accurate height and weight information so that technicians can correctly set the scanning parameters and calculate the required radioisotope dose (for PET / SPECT examinations). However, in the traditional operating process, the patient's height and weight information often depends on the patient's own oral statement or the visual observation of the hospital technician, and then the hospital technician manually enters it into the equipment or system. This method is not only inefficient, but also prone to discrepancies in information due to patient memory errors or technician input errors, which in turn affects the setting of subsequent scanning parameters and the accuracy of diagnosis.

[0003] An invention document with publication number CN106971061A discloses an integrated fully automatic detection device for human body condition parameters, comprising: a device body, an automatic detection device for human body condition parameters, a single-chip microcomputer, a first power supply, a display and broadcasting device, and a human body infrared sensing device respectively arranged on the device body, wherein the automatic detection device for human body condition parameters, the first power supply, the display and broadcasting device, and the human body infrared sensing device are respectively electrically connected to the single-chip microcomputer, and the automatic detection device for human body condition parameters comprises a weight measuring device, a height measuring device, a body temperature measuring device, a pulse rate measuring device, and a blood pressure measuring device.

[0004] For nuclear medicine equipment such as PET / SPECT, the calculation of the amount of radioisotopes is the key to ensuring that patients receive accurate diagnosis and treatment. The calculation of the amount of radionuclides needs to take into account multiple factors such as the patient's weight, condition, and lesion location, and the accuracy of the weight information directly affects the calculation accuracy of the radionuclides. If the weight information is inaccurate, the patient may receive too high or too low a radioactive dose, which may affect the diagnostic effect and increase the patient's radiation risk.

[0005] Similarly, in CT scans, the patient's height and weight are also important bases for determining scan parameters (such as kV, mAs, etc.). The selection of these parameters directly affects the image quality and the patient's radiation dose. If the parameter setting is low, it may result in poor image quality and fail to provide accurate diagnosis for doctors; if the parameter setting is high, it will increase the patient's radiation dose and increase the patient's health risk.

[0006] In summary, the traditional method of collecting height and weight information has many shortcomings. There is an urgent need for a method and equipment that can automatically, accurately and conveniently collect patients' height and weight information, and combine it with software applications to improve the accuracy and efficiency of medical imaging diagnosis and reduce patients' radiation risks. Summary of the invention

[0007] In view of the defects in the prior art, the object of the present invention is to provide an auxiliary step device and a scanning application method for PET / SPECT / CT equipment.

[0008] An auxiliary ladder device for PET / SPECT / CT equipment provided by the present invention comprises: ladder steps, support rods, connecting rods, stress sheets, a mainboard display screen and a control module;

[0009] The steps are used to assist the patient to get into bed and bear weight; the support rod is used to support the connecting rod, and an ultrasonic sensor is provided on the connecting rod to measure the patient's height; the stress sheet is provided on the steps to measure the patient's weight; the mainboard display screen is used to display the patient's height and weight information; the control module is provided inside the steps, connected to the mainboard display screen, the ultrasonic sensor and the stress sheet, and the control module includes a microcontroller STM32 series single-chip microcomputer, which is respectively connected to the HX711 weight sensor to receive the signal of the stress sheet and convert it into weight information, and is connected to the HC-SR04 ultrasonic sensor to receive the ultrasonic signal and convert it into height information.

[0010] Preferably, the device further comprises casters, which are arranged at the bottom of the steps of the stairs and are used to facilitate the movement of the overall auxiliary ladder device.

[0011] Preferably, the connecting rod is telescopic and can be retracted along the direction of the supporting rod to meet the height requirements of different patients.

[0012] Preferably, the mainboard display screen is also used to display power and time information, and the control module also includes a wireless module for wirelessly transmitting the patient's height and weight information to a personal mobile phone App.

[0013] Preferably, the control module is connected to the control link of the PET / SPECT / CT device via a CAN or RS232 communication protocol, and the height and weight information of the patient is uploaded to the main console computer in real time.

[0014] The present invention also provides a scanning application method of a PET / SPECT / CT device, the method using the auxiliary step device of the PET / SPECT / CT device described above, the method comprising the following steps:

[0015] Step S1: The patient steps onto the stairs, and the patient's weight and height are measured by a stress gauge and an ultrasonic sensor respectively;

[0016] Step S2: The control module receives the signals from the ultrasonic sensor and the stress gauge and converts them into height and weight information;

[0017] Step S3: the control module uploads the height and weight information to the main console computer of the PET / SPECT / CT device via wired or wireless means;

[0018] Step S4: The main console computer automatically calculates the reference value of the radionuclide dose required for injection before the test for PET / SPECT scanning based on the received height and weight information, and displays it on the software interface; for CT scanning, the embedded kV / mAs dose modulation algorithm automatically displays the reference value of the parameters required to be sent.

[0019] Preferably, before step S1, the method further includes: reading the patient's identity information through an IC card reader, and uploading the identity information to the main console computer.

[0020] Preferably, if the measured height or weight information exceeds a preset range, the control module issues an alarm prompt through the mainboard display screen.

[0021] Preferably, for PET / SPECT scanning in step S4: based on the calculated radionuclide dose reference value, the hospital technician accurately controls the radionuclide injection dose of the injection patient before the test; the doctor calculates the standard uptake value SUV based on the specific weight information for differentiation of benign and malignant tumors and evaluation of therapeutic efficacy.

[0022] Preferably, for CT scanning in step S4: according to the issued kV and mAs parameter reference values, through parameter optimization and intelligent dose control, the risk of radiation exposure to the subject is minimized while ensuring image quality.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention realizes the automatic, real-time and accurate measurement and uploading of the patient's height and weight information, significantly improves the accuracy of information entry, and avoids the errors that may occur when hospital technicians manually input the patient's oral body shape information; the automated measurement and uploading process also greatly improves work efficiency and reduces the workload of medical staff;

[0025] 2. The present invention can use the patient's height and weight information measured in real time to automatically calculate the reference value of the injected radionuclide dose before the test; it not only helps hospital technicians to accurately control the radionuclide dose of the injection subjects, reducing unnecessary radionuclide waste and radiation exposure damage, but also can more accurately calculate the standard uptake value SUV based on the current measured height and weight information, providing more reliable data support for doctors to diagnose benign and malignant tumors and evaluate the efficacy in the later stage;

[0026] 3. The present invention uploads the patient's height and weight information in real time, embeds the kV / mAs dose modulation algorithm, and automatically displays and sends the recommended reference values ​​of parameters, making it possible to optimize the differentiated parameters and intelligently control the dose for different population types, thereby minimizing the risk of invalid radiation exposure to the subjects and protecting the health of the patients while ensuring the image quality;

[0027] 4. The real-time and accurate body shape data information provided by the present invention can not only be used to assist hospital technicians in controlling radionuclide injection doses or as a reference for setting scanning examination parameters, but can also be used to guide doctors in later film reading and judgment. In the field of nuclear medicine, this function is of great significance for more accurate assessment and judgment of growth or disappearance activities during tumor treatment, which helps to improve the accuracy of medical image analysis and provide strong support for tumor diagnosis, efficacy monitoring and prognosis prediction. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0029] Figure 1 It is a schematic diagram of the application of the auxiliary ladder device of the present invention;

[0030] Figure 2 It is a diagram of the auxiliary ladder device of the present invention;

[0031] Figure 3 It is a circuit structure block diagram of the auxiliary ladder device of the present invention;

[0032] Figure 4 It is a schematic diagram of the main circuit structure of the auxiliary ladder device of the present invention;

[0033] Figure 5 It is a data link structure diagram of the auxiliary ladder device and PET / SPECT / CT equipment of the present invention;

[0034] Figure 6 A data collection flow chart for the auxiliary ladder device of the present invention;

[0035] Figure 7 This is a flow chart of the PET / SPECT / CT scanning application of the present invention.

[0036] in:

[0037] Power Distribution Unit PDU 1 Step 501

[0038] PET / SPECT / CT equipment main frame Gantry 2 support rod 502

[0039] Patient bed Couch 3 connecting rod 503

[0040] Console 4 Stress Sheet 504

[0041] Auxiliary ladder device 5 Mainboard display screen 505

[0042] IC card reader 6 casters 506 DETAILED DESCRIPTION

[0043] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0044] Embodiment 1:

[0045] Reference Figure 1 and Figure 2 According to the present invention, an auxiliary stair device for PET / SPECT / CT equipment includes: a stair step, a support rod, a connecting rod, a stress sheet, a mainboard display screen and a control module; the stair step is used to assist a patient to get into bed and bear weight; the support rod is used to support the connecting rod, and an ultrasonic sensor is provided on the connecting rod to measure the patient's height; the stress sheet is provided on the stair step to measure the patient's weight; the mainboard display screen is used to display the patient's height and weight information; the control module is provided inside the stair step, connected to the mainboard display screen, the ultrasonic sensor and the stress sheet, and the control module includes a microcontroller STM32 series single-chip microcomputer, which is respectively connected to the HX711 weight sensor to receive the signal of the stress sheet and convert it into weight information, and connected to the HC-SR04 ultrasonic sensor to receive the ultrasonic signal and convert it into height information.

[0046] The auxiliary ladder device of the PET / SPECT / CT equipment also includes casters, which are arranged at the bottom of the steps of the ladder for convenient movement of the overall auxiliary ladder device. The connecting rod can be telescopic and can be retracted along the direction of the support rod to meet the height requirements of different patients. The mainboard display screen is also used to display power and time information, and the control module also includes a wireless module for wirelessly transmitting the patient's height and weight information to a personal mobile phone App. The control module is connected to the control link of the PET / SPECT / CT equipment via a CAN or RS232 communication protocol, and uploads the patient's height and weight information to the main console computer in real time.

[0047] The present invention also provides a scanning application method of a PET / SPECT / CT device, the method using the auxiliary step device of the PET / SPECT / CT device described above, the method comprising the following steps:

[0048] Step S1: The patient steps onto the stairs, and the patient's weight and height are measured by a stress gauge and an ultrasonic sensor respectively;

[0049] Step S2: The control module receives the signals from the stress sheet and the ultrasonic sensor and converts them into height and weight information;

[0050] Step S3: the control module uploads the height and weight information to the main console computer of the PET / SPECT / CT device via wired or wireless means;

[0051] Step S4: The main console computer automatically calculates the reference value of the radionuclide dose required for injection before the test for PET / SPECT scanning based on the received height and weight information, and displays it on the software interface; for CT scanning, the embedded kV / mAs dose modulation algorithm automatically displays the reference value of the parameters required to be sent.

[0052] For PET / SPECT scans: Based on the calculated radionuclide dose reference value, hospital technicians accurately control the radionuclide injection dose of the patient before the test; doctors calculate the standard uptake value SUV based on specific weight information, which is used to differentiate between benign and malignant tumors and evaluate the efficacy of the treatment.

[0053] For CT scans: Based on the issued kV and mAs parameter reference values, through parameter optimization and intelligent dose control, the risk of radiation exposure to the subjects is minimized while ensuring image quality.

[0054] Before step S1, the process also includes: reading the patient's identity information through an IC card reader, and uploading the identity information to the main console computer.

[0055] If the measured height or weight information exceeds the preset range, the control module will issue an alarm prompt through the mainboard display screen.

[0056] Embodiment 2:

[0057] The present invention adopts a microcontroller STM32 series single-chip microcomputer combined with an HX711 weight sensor, an HC-SR04 ultrasonic sensor and an LCD1602 display screen to form a minimum unit subsystem for weighing and ranging, which is integrated into an auxiliary ladder device and connected to a PET / SPECT / CT device, and is used for real-time and accurate uploading of height and weight information of a subject (or patient) on a software interface, thereby solving the problem that hospital technicians manually input body shape information orally given by subjects (or patients) one by one, which is not accurate and convenient enough; and for nuclear medicine equipment such as PET / SPECT scanning examination, combined with the real-time height and weight information before on-site scanning, the reference value of the injection nuclide dose before the test is automatically calculated, providing the hospital technician with a dose control of the nuclide pushed in, accurately controlling the nuclide dose of the injection subject, and accurately calculating the standard uptake value SUV (Standard The system automatically displays the reference value of the parameters by combining the height and weight information before the on-site scan and embedding the kV / mAs dose modulation algorithm. Through parameter optimization and intelligent dose control Dose Modulation for different body types, it can ensure image quality while minimizing the risk of ineffective radiation exposure to the subjects.

[0058] Reference Figure 1 , the auxiliary ladder device application diagram mainly includes 1-power distribution unit PDU, 2-PET / SPECT / CT equipment main frame Gantry, 3-patient bed Couch, 4-main console Console, 5-auxiliary ladder device, 6-IC card reader; among them, 1-power distribution unit PDU is connected with 2-PET / SPECT / CT equipment main frame Gantry, 3-patient bed Couch, 4-main console Console, and is used for power supply of 2-PET / SPECT / CT equipment main frame Gantry, 3-patient bed Couch, and 4-main console Console respectively; 6-IC card reader is connected with 4-main console Console, and is used for entering the identity information of the subject (or patient) before physical examination or examination, and 5-auxiliary ladder device is connected with 3-patient bed Couch, and is used for real-time measurement and transmission of the height and weight information of the patient.

[0059] Reference Figure 2The auxiliary stair device mainly consists of 1-stair step, 6-castors, 2-support rods, 3-connecting rods, 4-stress plates, and 5-mainboard display screen. Among them, 1-stair step is mainly used to assist patients to get on the bed and bear weight, and 6-castors are used for convenient movement of the overall auxiliary stair device; 2-support rod is mainly used to support 3-connecting rod, which can be quickly plugged into 1-stair step along the direction indicated by arrow a, and can be extended and retracted along the direction of arrow b to adapt to different heights and body shapes. The plug-in and extension method is convenient for overall disassembly and transportation; 3-connecting rod is equipped with 1 or more ultrasonic sensors for measuring patient height, which can be retracted along the direction of arrow c; 4-one or more stress plates are used to measure patient weight, and 5-mainboard display screen is used to display information such as power, height and weight; the control module (mainboard) is located inside 1-stair step and connected to 5-mainboard display screen. It is a detachable structure used to connect ultrasonic sensors and stress plates, etc.

[0060] Reference Figure 3 The circuit structure block diagram of the auxiliary ladder device is described as a HWMB (Height and weight measurement board) mainboard, which mainly includes a power module, a control module, a wireless module, a distance measurement module, a display module, a weight measurement module and a communication interface; wherein the power module is connected to the control module, and is used to provide power to the control module (mainboard); the control module is connected to the wireless module, the distance measurement module, the display module and the weight measurement module, respectively, and is used to wirelessly transmit information, receive distance information, display information and receive weight information; the communication interface is connected to the control module, and is used to connect to the PET / SPECT / CT equipment by wire for real-time transmission of the measured information.

[0061] Reference Figure 4In the specific implementation case, the HWMB (Height and weight measurement board) mainboard can be selected from the conventional microcontroller STM32 series single-chip microcomputer such as STM32F103C8T6 chip, with HX711 weight sensor, used to connect the stress sheet to read the resistance change and convert it into a digital signal to calculate the weight information; HC-SR04 ultrasonic sensor, used to read the ultrasonic echo signal to calculate the height information; in addition, it is equipped with LCD1602 display screen to intuitively display parameter information such as height and weight, and with wireless sensor ESP8266 to extend wireless communication, the measured information can be shared to the personal mobile phone App, and the above main chips and sensors form the minimum unit subsystem of weighing and ranging, which is integrated into the auxiliary ladder device and connected to the PET / SPECT / CT equipment to upload the patient's height and weight information to the main interface of the software, avoiding the hospital technicians manually entering the subject's oral body shape information one by one, which is not accurate enough and not convenient enough. In the specific implementation case, different types of single-chip microcomputers and sensors can be used to build a more affordable and expected minimum unit measurement subsystem.

[0062] Reference Figure 5 In a specific implementation case, the HWMB (Height and weight measurement board) mainboard can be connected to the GCC (Gantry controller control) control link of the PET / SPECT / CT device through a communication protocol such as CAN or RS232, and then transmitted to the SC (System control) communication link of the underlying data control of the main console computer, and then the height and weight information measured and sent by the HWMB (Height and weight measurement board) is directly displayed on the upper computer software PA (Patient Registration) interface. In a specific implementation case, different communication methods can also be selected to be compatible or adapted to PET / SPECT / CT devices of different manufacturers.

[0063] Reference Figure 6 ,In the specific implementation case, the main workflow diagram of HWMB (Height and weight ,measurement board) includes parts (1) and (2), which respectively measure the distance of the object to ,be measured, i.e. the height of the patient, and measure the object to be measured, i.e. the weight of the patient.

[0064] After the system is started, it is initialized first, and then the distance of the object to be measured, such as the height of the patient, is measured. Finally, the measurement result is sent to the LCD1602 for display. If the measured distance exceeds the specified range, an alarm prompt will be given. At the beginning, the HC-SR04 customizer is initialized, and the TRIG trigger signal is sent. The ECHO port will output a high level 1 and start to test the distance. The microcontroller STM32F103C8T6 starts the counter to count after detecting the high level of the ECHO port. When the microcontroller STM32F103C8T6 detects that the ECHO port becomes a low level, it stops counting. The count value of the counter multiplied by the counting cycle is the round-trip time from the transmission to the reception of the ultrasonic wave, that is, the distance S = V*T / 2.

[0065] After the system is started, it is also initialized first, and then the weight of the object to be measured, such as the weight of the patient, is measured. Finally, the measurement result is sent to the LCD1602 for display. If the measured weight exceeds the specified range, an alarm prompt will be given. At the beginning, HX711 is initialized, and the initial voltage resistance is obtained through the stress sheet connected to its pin A+ / A-. Then, when the object to be measured or the patient steps on the step stress sheet, the bridge circuit generates a bridge circuit voltage difference, which is then amplified by the built-in differential amplifier and output by the pin DOUT. It is synchronized by the PD_SCK pin clock signal, and finally the microcontroller STM32F103C8T6 amplifies the input signal and outputs it digitally to obtain the weight data.

[0066] Reference Figure 7 In a specific implementation case, HWMB (Height and weight measurement board) is connected to PET / SPECT / CT equipment for real-time transmission communication, and the flow chart is as follows:

[0067] When the operation console starts the examination, the patient's identity information is read through the IC card reader, and the patient's body shape such as height and weight is read through the auxiliary ladder device, and then uploaded to the GCC (Gantry controller control) control link, and then transferred to the SC (System control) communication link. Finally, if the device performing the examination is a nuclear medicine PET or SPECT device, the radionuclide dose reference value is calculated through a specific algorithm (see Note 1 for the method) and directly displayed on the PA (Patient Registration) interface, providing hospital technicians with dose control for pushing radionuclides, accurately controlling the radionuclide dose before the injection test, and at the same time, according to the current patient's actual measured specific weight information, the standard uptake value SUV (Standard uptake value) can be calculated more accurately (see Note 3 for the method), which is convenient for doctors to diagnose benign and malignant tumors and evaluate the efficacy in the later stage.

[0068] Note 1: The basic formula for calculating the amount of nuclide can be found in:

[0069] Nuclide dosage (MBq) = patient weight (kg) x radioactivity per unit body weight (MBq / kg);

[0070] The radioactivity per unit body weight is determined based on the characteristics of the nuclide and the condition. Generally, different nuclides correspond to different radioactivity. For example, thyroid imaging usually uses nuclides. 131 I. Bone imaging using radionuclides 99m Tc; In practical applications, the dosage of the nuclide also needs to consider the half-life of the nuclide. The effective half-life can be obtained based on the half-life, thereby determining the dosing interval. The effective half-life of the nuclide Teff = T1 / 2 / In2 (T1 / 2 is the half-life of the nuclide, In2 is the base of the natural logarithm); In actual more detailed consideration, the dosage of the nuclide also needs to consider the patient's age and gender. Different ages and genders have certain differences in the metabolism and excretion of the nuclide. It is necessary to estimate the injection dose of the nuclide based on multiple factors such as the patient's age, gender, height and weight, and condition.

[0071] If the device performing the examination is a CT device, kV and mAs reference values ​​are generated through a specific algorithm (see Note 2 for the method) and displayed on the EXAM examination interface. Specifically, the kV / mAs dose modulation algorithm is embedded to automatically display and send parameter reference values ​​in combination with the height and weight information before the on-site scan. After parameter optimization and intelligent dose modulation, the risk of ineffective radiation exposure to the subject can be minimized while ensuring image quality.

[0072] Note 2: CT radiation dose is closely related to image quality. The greater the radiation dose, the more photons are received by the detector, resulting in a clearer image. However, if the number of photons exceeds a certain value, the image will not be further improved. Too high a dose will cause the patient to receive too much ineffective radiation.

[0073] When other parameters are consistent, tube voltage kV is proportional to radiation dose, tube current mA*time s is linearly related to radiation dose, and pitch and layer thickness are inversely proportional to radiation dose;

[0074] The present invention conceives to utilize the patient's current specific height and weight information, and to determine whether the patient is short, tall, thin, obese, normal or other different types through a big data model. In combination with the patient's age and scanning part, different tube voltages kV and mAs are recommended from high to low according to the characteristics of radiation attenuation. For example, if A≤weight kg≤B, C≤height cm≤D is determined to be a person of moderate stature but relatively obese, then a higher kV and mAs are recommended for head scanning; in addition, mAs tube current real-time control technology is added, and the scanning part during the next tomography scan is known according to the patient's positioning imaging. For example, for obese patients, a larger mA* and faster rotation speed s is used when scanning the head, a larger mA* and faster rotation speed s is used for the neck, chest and lungs, and a lower mA* and slower rotation speed s is used for the abdomen; for normal or thin people, one or more dose levels are reduced to achieve the same clear image for diagnosis.

[0075] Note 3: Nuclear medicine, such as PET / SPECT equipment, is a discipline that uses radioactive isotopes to diagnose and treat diseases. Nuclide dosage calculation is a very important part of nuclear medicine. Correct nuclide dosage calculation can ensure that patients receive accurate diagnosis and treatment while minimizing radiation damage to patients and medical staff. In the nuclide dosage calculation, factors such as the patient's height, weight, condition, lesion location, as well as parameters such as the half-life and radioactivity of the nuclide need to be considered.

[0076] The full name of SUV is standard uptake value (SUV), which is a semi-quantitative index commonly used in PET / SPECT tumor diagnosis. It refers to the radioactivity of the imaging agent taken up by local tissues and the average injected activity of the whole body. SUV = radioactivity concentration of lesions (kBq / ml) / injection dose (MBq) / body weight (kg). There are many ways to calculate SUV, most of which require specific weight and height information. This patent only gives examples of two methods: BSA is SUV standardized using body surface area, and BMI is SUV standardized using body mass index.

[0077]

[0078] BSA(m 2 ) = weight (kg) 0.425 ×Height (cm) 0.725 ×0.007184

[0079]

[0080] BMI (kg / m 2 ) = weight (kg) / height (cm) 2

[0081] In a specific implementation case, taking the CT host computer application software as an example, the inspection software interface PA (Patient Registration) needs to manually fill in the patient data, including the patient's name, age, date of birth, height and weight, etc. Although the technician can enter the patient's name, age, and date of birth into the Worklist system in advance before batch inspection, the height and weight information are all verbally stated by the patient or visually estimated by the technician, which is not accurate enough and specific enough, and the accuracy and effectiveness of subsequent inspections cannot be guaranteed, which is not conducive to later clinical evaluation. The present invention provides real-time and accurate body shape data information before scanning, and can guide the technician to operate the injection push dose or the setting reference of the scanning inspection parameters before scanning. After scanning, it can guide the doctor to read the film and make judgments, especially for nuclear medicine such as PET / SPECT equipment. It is of great significance and can be stored in the collected data together. By calculating the ratio of the radioactive concentration in the lesion area to the injection dose / height and weight, the growth or disappearance activity during the tumor treatment process can be more accurately evaluated and judged, which is convenient for the diagnosis, efficacy monitoring and prognosis prediction of tumors, and is crucial for medical image analysis.

[0082] The present invention adopts a microcontroller STM32 series single-chip microcomputer combined with an HX711 weight sensor, an HC-SR04 ultrasonic sensor and an LCD1602 display screen to form a minimum unit subsystem for weighing and ranging, integrates it into an auxiliary ladder device, connects it to a PET / SPECT / CT device, and is used for real-time uploading of height and weight information of subjects (or patients) on a software interface, thereby solving the problem that hospital technicians manually input oral body shape information of subjects (or patients) one by one, which is not accurate and convenient enough; and for nuclear medicine equipment such as PET / SPECT scanning examination, by adopting real-time uploading of height and weight information before on-site scanning, the reference value of the subject's injected nuclide dose is automatically calculated, thereby solving the problem of the hospital technician pushing the nuclide dose control, accurately controlling the nuclide dose of the injection subject, and at the same time, the standard uptake value SUV (Standard uptake value) can be accurately calculated according to the specific weight information, thereby solving the problem that doctors can better diagnose benign and malignant tumors and evaluate the efficacy; and for radiology equipment such as CT scanning detection, by adopting real-time uploading of height and weight information before on-site scanning, a kV / mAs dose modulation algorithm is embedded to automatically display and send parameter reference values, and after parameter optimization and intelligent dose control Dose Modulation solves the problem of ensuring image quality while minimizing the risk of ineffective radiation exposure to subjects.

[0083] Those skilled in the art may understand this implementation case as a more specific description of Example 1.

[0084] Those skilled in the art know that, in addition to realizing the system and its various devices, modules, and units provided by the present invention in a purely computer-readable program code, it is entirely possible to realize the same functions in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, the system and its various devices, modules, and units provided by the present invention can be considered as a hardware component, and the devices, modules, and units included therein for realizing various functions can also be regarded as structures within the hardware component; the devices, modules, and units for realizing various functions can also be regarded as both software modules for realizing the method and structures within the hardware component.

[0085] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. An auxiliary step device for PET / SPECT / CT equipment, characterized in that: include: Stair steps, support rods, connecting rods, stress sheets, mainboard display screen and control module; The steps are used to assist the patient to get on the bed and bear the weight; the support rod is used to support the connecting rod, and an ultrasonic sensor is provided on the connecting rod to measure the height of the patient; The stress gauge is arranged on the step of the stairs to measure the patient's weight; the mainboard display screen is used to display the patient's height and weight information; the control module is arranged inside the step of the stairs and is connected to the mainboard display screen, the ultrasonic sensor and the stress gauge. The control module includes a microcontroller STM32 series single-chip microcomputer, which is respectively connected to the HX711 weight sensor to receive the signal of the stress gauge and convert it into weight information, and is connected to the HC-SR04 ultrasonic sensor to receive the ultrasonic signal and convert it into height information.

2. The auxiliary step device of the PET / SPECT / CT equipment according to claim 1, characterized in that: The device also includes casters, which are arranged at the bottom of the steps of the stairs and are used to facilitate the movement of the overall auxiliary ladder device.

3. The auxiliary step device of the PET / SPECT / CT equipment according to claim 1, characterized in that: The connecting rod can be extended and retracted along the direction of the supporting rod to meet the height requirements of different patients.

4. The auxiliary step device of the PET / SPECT / CT equipment according to claim 1, characterized in that: The mainboard display screen is also used to display power and time information, and the control module also includes a wireless module for wirelessly transmitting the patient's height and weight information to a personal mobile phone App.

5. The auxiliary step device of the PET / SPECT / CT equipment according to claim 1, characterized in that: The control module is connected to the control link of the PET / SPECT / CT device via the CAN or RS232 communication protocol, and the height and weight information of the patient is uploaded to the main console computer in real time.

6. A scanning application method of a PET / SPECT / CT device, characterized in that: The method uses the auxiliary step device of the PET / SPECT / CT device according to any one of claims 1 to 5, and the method comprises the following steps: Step S1: The patient steps onto the stairs, and the patient's weight and height are measured by a stress gauge and an ultrasonic sensor respectively; Step S2: The control module receives the signals from the stress sheet and the ultrasonic sensor and converts them into height and weight information; Step S3: the control module uploads the height and weight information to the main console computer of the PET / SPECT / CT device via wired or wireless means; Step S4: The main console computer automatically calculates the reference value of the radionuclide dose required for injection before the test for PET / SPECT scanning based on the received height and weight information, and displays it on the software interface; for CT scanning, the embedded kV / mAs dose modulation algorithm automatically displays the reference value of the parameters required to be sent.

7. The scanning application method of the PET / SPECT / CT device according to claim 6, characterized in that: Before step S1, the method also includes: reading the patient's identity information through an IC card reader, and uploading the identity information to the main console computer.

8. The scanning application method of the PET / SPECT / CT device according to claim 6, characterized in that: If the measured height or weight information exceeds the preset range, the control module will issue an alarm prompt through the mainboard display screen.

9. The scanning application method of the PET / SPECT / CT device according to claim 6, characterized in that: For PET / SPECT scanning in step S4: based on the calculated radionuclide dose reference value, the hospital technician accurately controls the radionuclide injection dose of the injection patient before the test; the doctor calculates the standard uptake value SUV based on the specific weight information for differentiation of benign and malignant tumors and evaluation of therapeutic efficacy.

10. The scanning application method of the PET / SPECT / CT device according to claim 6, characterized in that: For CT scanning in step S4: according to the issued kV and mAs parameter reference values, through parameter optimization and intelligent dose control, the risk of radiation exposure to the subject is minimized while ensuring image quality.

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