242results about "Radiation diagnostic image/data processing" patented technology

The invention relates to an image registration method, an image registration device, an electronic device and an image registration system. According to a first mapping relation between an intra-operative two-dimensional image coordinate system and a reference coordinate system of an intra-operative two-dimensional image, the image registration method and the image registration device are obtained; obtaining a first registration matrix between the reference coordinate system and the preoperative three-dimensional image coordinate system according to a first mapping relation between the reference coordinate system and the preoperative three-dimensional image coordinate system and a second mapping relation between the preoperative three-dimensional image coordinate system and the intra-operative two-dimensional image coordinate system of the preoperative three-dimensional image; wherein the intraoperative two-dimensional image and the preoperative three-dimensional image both comprise a target object; a simulated two-dimensional image obtained after the preoperative three-dimensional image is projected to the two-dimensional space in a simulated mode is obtained; according to the similarity between the intraoperative two-dimensional image and the simulated two-dimensional image, adjusting parameters of the first registration matrix to obtain a second registration matrix; according to the invention, the wound exposure time can be reduced during image registration, and the operation is convenient.

The present disclosure relates to a method for imaging and an imaging system. The method includes obtaining a scanning protocol for an examination subject, which includes: obtaining calibration data associated with the scanning protocol in response to a commonly used scanning protocol calibration data set of a medical imaging system including the calibration data; or performing a calibration operation in response to a commonly used scanning protocol calibration data set of a medical imaging system not including calibration data associated with the scanning protocol, to generate calibration data associated with the scanning protocol. The method further includes scanning the examination subject based on the scanning protocol, to obtain raw imaging data, and performing reconstruction using the calibration data associated with the scanning protocol and the raw imaging data, to obtain a medical image of a scanned subject.

A calibration target for use with a radiographic image detector includes a target body securable to the image detector and a plurality of radiopaque linear markers, e.g. wires, fixed to the target body, wherein access to the image detector by incident radiation is at least partially blocked by the plurality of linear markers. By using the geometric properties of wires and advanced detection techniques, a precise calibration suitable for high-quality, volumetric three-dimensional CT reconstruction from biplanar X-ray images is achieved.

The embodiments of the present disclosure provide a method and system for computed tomography (CT) imaging. The CT imaging method comprises: obtaining scanning data of a target subject, the scanning data being acquired by scanning the target subject using a CT device; determining data after air correction by performing air correction on the scanning data using an air correction table; determining projection data of at least two standard materials by performing basis material decomposition on the data after air correction; and generating a target image based on the projection data of the at least two standard materials.

Embodiments of the present disclosure may provide a system, a method, and a device for X-ray imaging. The method may include: obtaining a grayscale of a current frame of an object, wherein the current frame is obtained by performing X-ray imaging on the object based on current performing parameters; determining an updated equivalent phantom thickness of the object based on the grayscale of the current frame, the current performing parameters, and a pre-stored correspondence, wherein the pre-stored correspondence reflects dose values corresponding to a plurality of equivalent phantom thicknesses and a plurality of performing parameters; and determining target performing parameters of a next frame of the object based on the updated equivalent phantom thickness, a target grayscale, and the pre-stored correspondence.

The invention provides an imaging method, device and equipment of an interventional instrument. The imaging method comprises the following steps: acquiring a movement track and a current position of the interventional instrument in an interventional environment; according to the motion trail and the current position, a local scanning visual field area of the imaging equipment is determined, and the local scanning visual field area at least comprises an expected advancing path of the interventional instrument; and imaging the interventional instrument according to the local scanning view area to obtain a local image of the interventional instrument. The radiation quantity in the imaging process of the interventional instrument is reduced, and the imaging accuracy is improved.

Systems and methods are provided for increasing a quality of computed tomography (CT) images. In one embodiment, a computed tomography (CT) detector system comprises a layer of energy integrating detectors (EID) arranged below a layer of photon counting (PC) sensors with respect to an incoming x-ray, where a number of the PC sensors exceeds a number of the EID detectors; and an image processing unit configured to correct PC data using EID data, and denoise and increase a resolution of an image reconstructed from EID data and PC data using a deep learning convolutional neural network (CNN) trained on pairs of images, each pair of images including a target image reconstructed from a first signal from the layer of PC sensors, and an input image reconstructed from a second signal from the layer of EID detectors, the EID data and PC data acquired concurrently from a same patient ray path.

A system and method combine optical and radiographic data to enhance imaging capabilities. Specifically, the system combines visually obtained patient pose position information and radiographic image information to facilitate calibrated surgical navigation. The process involves a data acquisition phase, a system calibration phase, a volume reconstruction phase, and a surgical navigation phase, all resulting in the alignment of instrument coordinates with the patient and reconstructed volume coordinates enabling tracking and navigation of surgical instruments within a reconstructed 3D volume of the patient anatomy, even if such anatomy is not exposed during a procedure.

The present invention relates to the technical field of radiology, in particular to the field of assisting radiologists performing radiological examinations by using artificial intelligence methods. The present invention also relates to the training of a machine learning model and the use of the trained model for predicting a representation for an examination region in one or more states of a sequence of states in a radiological examination.

The present invention relates to a medical image conversion method, and more particularly, to an image conversion method for converting medical images using a generative adversarial network (GAN). According to one embodiment of the present invention, there is provided a medical image conversion method that enables medical staff to perform medical examinations, diagnoses, and treatments with accurate information through conversion between medical images using a learning model that performs machine learning, thereby enabling patients to receive appropriate medical services.

A multi-spectral tomography imaging system includes one or more source devices configured to direct beams of radiation in multiple spectra to a region of interest (ROI), and one or more detectors configured to receive the beams of radiation. The system includes a processor configured to cause movement in at least one of the components such that a first beam of radiation with a first spectrum is directed to the ROI for less than 360 degrees of movement of the ROI. The processor is also configured to process data detected by the one or more detectors, where the data results at least in part from the first beam of radiation with the first spectrum that is directed to the ROI for less than the 360 degrees of movement of the ROI. The processor is further configured to generate an image of the ROI based on the processed data.

A radiation imaging apparatus comprising pixels, a driver controlling the pixels via driving lines, a readout circuit reading out, via column signal lines, signals from the pixels and a detector detecting irradiation information of radiation separately from a radiation image, is provided. Each of the column signal lines is connected to pixels arranged on two pixel columns. The pixels include a first pixel and a second pixel, whose sensitivities are different from each other. The first and second pixels are connected to a common column signal line and are connected to driving lines different from each other. When detecting the irradiation information, the driver drives the first and second pixels at timings different from each other, and the detection circuit detects the irradiation information based on signals output from the first and second pixels.

The invention relates to a method for medical imaging and a medical imaging system. The method comprises the following steps: acquiring a scanning protocol for an inspection object; aiming at the scanning protocol: responding to calibration data associated with the scanning protocol included in a common scanning protocol calibration data set of the medical imaging system, and obtaining the calibration data; or in response to the fact that the calibration data associated with the scanning protocol is not included in the common scanning protocol calibration data set of the medical imaging system, performing calibration operation to generate the calibration data associated with the scanning protocol; scanning the examination object based on a scanning protocol to obtain original imaging data; and using calibration data associated with the scanning protocol and the original imaging data for reconstruction to obtain a medical image of the scanned object.

The application provides a femoral head necrosis staging judgment method, system, device and storage medium, comprising: acquiring femoral head necrosis X-ray images, using a target detection model to identify all femoral head necrosis X-ray images to obtain an identification confidence; using a target segmentation model to segment the femoral head necrosis X-ray images respectively to obtain a plurality of segmentation regions, and giving each segmentation region a region label; dividing the femoral head necrosis X-ray images into a plurality of regions of interest, giving all regions of interest corresponding region labels according to the positions of the regions of interest; calculating the segmentation confidence of each region of interest according to the region labels, and calculating the probability of the femoral head necrosis X-ray images in each stage according to the segmentation confidence and the identification confidence, and selecting the stage with the maximum probability as the femoral head necrosis stage. The application solves the problem of low staging accuracy caused by manual femoral head necrosis staging in the prior art.

A technology is provided that enables image reconstruction or supports a reconstruction method without having to assume a specific periodicity for the movement of a recorded object. According to one embodiment, an information processing system for processing projection images acquired with a CT device is provided. The information processing system includes a feature acquisition unit, a spectral decomposition unit, and a synchronization processing unit. The feature acquisition unit is configured to acquire waveform data representing feature quantities obtained from the respective projection images.The spectral decomposition unit is configured to obtain decomposed waveform data by applying a predetermined analysis method to the waveform data, wherein the decomposed waveform data is data of waveforms obtained by decomposing the waveform data. The synchronization processing unit is configured to determine, based on a waveform represented by the decomposed waveform data, those of the projection images to be used for reconstruction.

The application provides a magnetocardiogram registration system and method based on optical scanning, and the system comprises a bed body registration module and a CT image registration module. The bed body registration module comprises a first arc-shaped marker and an L-shaped base, and the CT image registration module comprises a second arc-shaped marker which is consistent in shape with the first arc-shaped marker of the bed body registration module. Both the bed body registration module and the CT image registration module are made of non-magnetic photosensitive resin material. Before magnetocardiogram (MCG) acquisition, the two registration modules are digitized by using a handheld optical scanner. According to the bed body registration module, the sensor array coordinate system and the human body coordinate system are aligned. When CT scanning is performed, the image structure of the trunk part of a subject is obtained. According to the CT image registration module, the human body coordinate system and the CT coordinate system are aligned. Correspondingly, the application also provides a registration method corresponding to the system, which significantly improves the efficiency and accuracy of the MCG registration process and promotes the subsequent medical research and application of MCG.

To provide a data processing method for static computed tomography scanning and a device.SOLUTION: The data processing method for static computed tomography scanning includes: performing, in response to receiving a beam synchronization pulse signal, a time synchronization on N angle pulse signals and a time synchronization on N belt pulse signals by using the beam synchronization pulse signal, so as to obtain N synchronization angle pulse signals and N synchronization belt pulse signals, respectively (operation S210); generating N timestamps based on the N synchronization angle pulse signals and the N synchronization belt pulse signals, where the N timestamps correspond to N scanning imaging systems of a static computed tomography scanning device, respectively, and each of the N timestamps includes angle data and belt data (operation S220); and packaging beam data, detection data, the angle data, and the belt data corresponding to each of the N scanning imaging systems to obtain N data packets (operation S230).SELECTED DRAWING: Figure 2

The radiation imaging apparatus of the present disclosure includes an image output unit that outputs a first radiation image included in a series of radiation images acquired by radiation imaging of a subject, an image brightness information extraction unit that acquires brightness information from the first radiation image, a first irradiation condition calculation unit that determines a first irradiation condition based on the brightness information, an irradiation control unit that controls the dose of radiation based on the first irradiation condition, a second irradiation condition calculation unit that determines a second irradiation condition based on a second radiation image generated based on the first irradiation condition when the imaging site of the subject is fixed, and a dose reduction unit that reduces or maintains the dose of radiation based on the second irradiation condition.

An X-ray diagnostic apparatus according to the embodiment includes an X-ray tube, an X-ray diaphragm assembly, an X-ray detector, and processing circuitry. The X-ray diaphragm assembly includes an X-ray diaphragm defining an irradiation field of X-rays emitted from the X-ray tube and has a characteristic object. The X-ray detector is configured to detect the X-rays emitted from the X-ray tube and passed through a subject. The processing circuitry is configured to calculate information indicating a relative positional relationship between the X-ray tube and the X-ray detector based on an image of the characteristic object depicted in an X-ray image being based on transmission data acquired by the X-ray detector.

A radiation imaging apparatus includes an image obtaining unit configured to obtain image data corresponding to incident radiation, and an image processing unit configured to perform a first bone density measurement based on image data obtained by the image obtaining unit with a first exposure field, and perform a second bone density measurement based on image data obtained by the image obtaining unit with a second exposure field narrower than the first exposure field.

The present invention provides an image inspection apparatus, a control console, and a radiographic imaging system that reduces the workload of an image inspection process by automatically and accurately overlaying marks indicating the photographic direction and / or laterality of a subject onto a radiographic image. The image inspection apparatus (10) includes: a radiographic image acquisition unit (11) for acquiring a radiographic image (16) of a subject photographed using radiation; a photographic condition recognition unit (13) for recognizing photographic conditions related to the photographic direction and / or laterality of the subject illuminated in the radiographic image (16); and a mark overlay unit (14) for overlaying marks indicating the photographic direction and / or laterality of the subject illuminated in the radiographic image (16) onto the radiographic image (16) using the recognition result of the photographic condition recognition unit (13).

The application relates to the technical field of image processing, and provides a tooth detection method and device, a terminal device and a readable storage medium, the method comprising the following steps: acquiring a CT image of a patient's oral cavity and preprocessing the CT image to obtain a three-dimensional tooth region image; performing post-processing by using a tooth detection model to obtain a tooth detection result of the patient; wherein the tooth detection model comprises a full-tooth segmenter, a tooth crown and root segmenter and a tooth crown classifier; when the post-processing is performed, the three-dimensional tooth region image is input into the full-tooth segmenter to obtain a full-tooth segmentation result; the full-tooth segmentation result and the CT image are input into the tooth crown and root segmenter to obtain a tooth crown and root segmentation result; and then the tooth crown and root segmentation result and the CT image are input into the tooth crown classifier to obtain a tooth crown classification result. The method can accurately obtain tooth segmentation information and missing tooth position information of the patient, and has high calculation speed.

The invention is suitable for the field of sports trauma repair and rehabilitation physical therapy instruments, and provides a real-time image monitoring and regulating system and device in tendon trauma treatment. In the embodiment provided by the invention, the system acquires real-time images in the pulsed electric field tendon functional wound repair and rehabilitation treatment process through the image acquisition module, and then determines a dynamic time evolution curve of the tendon repair and healing process according to the radioactive drug concentration through the image analysis module; and finally, performing high-intensity and low-intensity nanosecond pulse electric fields on target tendon anastomotic stoma and peritendon in different healing states according to the curve so as to realize differential stimulation regulation and control. Therefore, the intelligence and the accuracy of performing differential stimulation treatment on the tendon through the nanosecond pulse electric field are improved.

The disclosure relates to a system and method for correcting PET image data. PET image data of a first part of a subject may be obtained. CT image data of a second part of the subject may be obtained. The first part may include the second part. PET voxel data of the first part may be obtained based on the PET image data of the first part. A relationship between the CT image data and PET voxel data of the second part may be determined. CT image data of a third part of the subject may be determined based on the relationship and PET voxel data of the third part. The first part may include the third part. An attenuation map may be determined based on the CT image data of the second part and the third part. The PET image data of the first part may be corrected based on the attenuation map.

The invention relates to the technical field of auxiliary diagnosis and treatment systems, in particular to an auxiliary diagnosis and treatment system for oral treatment. Comprising an oral cavity data acquisition module, a data preprocessing module, an oral cavity three-dimensional model construction module, an oral cavity tissue health condition quantitative analysis module, an occlusion function evaluation and anomaly recognition module, a preliminary auxiliary diagnosis and treatment scheme making module, an auxiliary diagnosis and treatment scheme simulation module and an auxiliary diagnosis and treatment scheme optimization and adjustment module. According to the method, data such as teeth, periodontium and occlusion relation in the oral cavity of the patient can be comprehensively and accurately obtained through multi-dimensional oral cavity data collection in combination with a data integrity check formula, the problem that in the prior art, the data collection dimension is single and incomplete is solved, and high-quality basic data is provided for subsequent diagnosis and treatment.

A method for image generation. The method may comprise: obtaining a three-dimensional (3D) base image of a target subject (310), the 3D base image being captured by performing a 3D scan on the target subject with a preset posture; obtaining one or more two-dimensional (2D) scout images of the target subject (320), the one or more 2D scout images of the target subject being captured by performing a scout scan on the target subject with the preset posture after an internal structure of the target subject changes; generating a 3D predicted image of the subject based on the 3D base image and the one or more 2D scout images (330), the 3D predicted image indicating the internal structure of the target subject when the one or more 2D scout images are captured.

A radiation imaging apparatus includes: an image obtaining unit configured to obtain image data corresponding to incident radiation; and an image processing unit configured to perform first bone density measurement based on image data obtained by the image obtaining unit with a first exposure field and perform second bone density measurement based on image data obtained by the image obtaining unit with a second exposure field narrower than the first exposure field.

The invention discloses a voltage regulation and control X-ray subtraction imaging method, which is characterized in that high-energy and low-energy X-ray photons are absorbed by designing a high-thickness X-ray direct detector. The internal electric field distribution of the detector is adjusted by changing the bias voltage, and part of photon-generated carriers are selectively absorbed. X-rays obtained under different voltages are used for subtraction according to a certain algorithm, different substance attributes in an X-ray image can be judged, and images of substances with different attributes are separately displayed. According to the invention, a set of different energy spectrum X-ray image separation and subtraction algorithm is provided, and the spatial distribution of different density parts of a detected object is obtained by using X-ray transmission images under different bias voltages; and according to the spatial distribution of different densities of the detected object, separating to obtain independent X-ray images of different substance attribute components of the detected object.

Described herein is software and computer implemented methods for modeling a heart of an individual where the model presents or displays one or more cardiac parameters of the individual. In some embodiments, a model of the heart generated by the software and computer implemented methods described herein is a three-dimensional representation of the heart of an individual that is displayable on a display of a computing device.