17results about "Radiation diagnostics testing/calibration" patented technology

The invention relates to a device for performing an examination of an object by means of X-ray radiation, wherein the device has a functional element which is movably arranged in a radiation region in a movement direction and a position sensor, the functional element having an electrically and / or magnetically conductive region, wherein the position sensor is an electric coil assembly for detecting the conductive region and for providing an overall voltage depending on the detection of the conductive region, wherein the coil assembly has an excitation coil for providing an alternating magnetic field and two series-connected detection coils for detecting at least a portion of the alternating magnetic field, wherein the detection coils and the excitation coil are arranged such that the overall voltage over the two detection coils is dependent on the position of the functional element relative to the position sensor, wherein the device is configured to derive a position signal dependent on the position of the functional element relative to the position sensor from the overall voltage.

Systems and methods for analyzing images. The methods comprise using an imaging device to acquire a pre-shot image of a target anatomical area of an individual; analyzing the pre-shot image to assess image quality of one or more regions within the pre-shot image; and determining acquisition parameters for a full-dose image from the one or more measures of image quality. The methods also include acquiring, by the imaging device, a full-dose image using the acquisition parameters determined during analysis of the pre-shot image; and generating a final image from the full-dose image.

A radiographic imaging apparatus of the present disclosure includes an image outputter outputting a first radiographic image included in continuous radiographic images obtained by radiographic imaging of a subject, an image brightness information extractor obtaining brightness information from the first radiographic image, a first irradiation condition calculator determining a first irradiation condition based on the brightness information, an irradiation controller controlling a radiation dose based on the first irradiation condition, a second irradiation condition calculator determining a second irradiation condition based on a second radiographic image generated based on the first irradiation condition when an imaging site of the subject is fixed, and a dose reducer reducing or maintaining the radiation dose based on the second irradiation condition.

A functional component is arranged in the radiation region, configured to move in a movement direction and has at least one conductive region. A position sensor has an electrical coil arrangement configured to provide a summation voltage based on sensing of the at least one conductive region. The electrical coil arrangement includes an exciter coil configured to provide an alternating magnetic field, and two series-connected sense coils configured to sense at least part of the alternating magnetic field. The sense coils and the exciter coil are arranged such that the summation voltage across the sense coils depends on a position of the functional component relative to the position sensor. The apparatus is configured to determine a position signal based on the summation voltage, the position signal relating to the position of the functional component relative to the position sensor.

The embodiment of the present application discloses a three-dimensional camera calibration method, device and storage medium in X-ray imaging. The method comprises the following steps: obtaining a three-dimensional image of a calibration board photographed by a three-dimensional camera, wherein the calibration board contains a positioning mark, and the calibration board has a predetermined distance from an X-ray bulb; determining a first three-dimensional coordinate of the positioning mark in a three-dimensional camera coordinate system based on the three-dimensional image; determining a second three-dimensional coordinate of the positioning mark in an X-ray bulb coordinate system based on the distance; and determining a conversion matrix suitable for calibrating the three-dimensional camera based on the first three-dimensional coordinate and the second three-dimensional coordinate. The embodiment of the present application can overcome the system error caused by the difference between coordinate systems.

The invention relates to a scattered radiation mask for reducing X-ray scattered radiation, in particular for X-ray imaging, comprising a layer stack having a first X-ray transparent layer, a second X-ray absorbing layer and a third X-ray transparent layer, wherein the first layer, the second layer and the third layer each have at least one planar sub-layer, and adjacent sub-layers of the layer stack are coated one above the other in the stacking direction by means of an additive manufacturing method. The invention also relates to a device for X-ray imaging, a method for producing a scattered radiation mask, a facility for additive production of a scattered radiation mask, and the use of a facility with a coating unit for additive production of a scattered radiation mask.

The absorber mask according to the invention for shaping a plurality of therapeutic X-rays, in particular for radiotherapy of a patient, comprises: - a layer stack, - wherein the layer stack comprises several X-ray-absorbing layers, - wherein the several X-ray-absorbing layers each comprise at least one planar layer, - wherein adjacent layers of the layer stack are applied planarly to one another in the stacking direction by means of an additive manufacturing process, - wherein at least one X-ray-transparent layer and / or at least one X-ray-absorbing strip extending in the width direction is arranged between the several X-ray-absorbing layers.

A computed tomography (CT) imaging system includes a gantry having a bore, rotatable about an axis of rotation. The CT imaging system also includes a table configured to move a subject to be imaged into and out of the bore of the gantry. The CT imaging system further includes a radiation source mounted on the gantry and configured to emit an X-ray beam. The CT imaging system even further includes one or more smart sensors integrated with one or more components of the CT imaging system, wherein the one or more smart sensors are configured to monitor for one or more conditions related to the CT imaging system. The CT imaging system still further includes a controller configured to receive feedback from the one or more smart sensors and to adjust scheduling of service on the CT imaging system based on the feedback from the one or more smart sensors.

A removable crane for servicing a medical system is provided. In a first implementation, the removable crane couples to a couch of the medical system, wherein upon securing the removable crane to the couch, a jib of the removable crane is positioned to enter a bore of a drum of the medical system upon a movement of the couch towards the drum. In a second implementation, the crane is permanently coupled to the gantry, such that the crane can be in a first configuration for use and a second stowed configuration.

A computed tomography (CT) imaging system includes a gantry having a bore, rotatable about an axis of rotation. The CT imaging system also includes a table configured to move a subject to be imaged into and out of the bore of the gantry. The CT imaging system further includes a radiation source mounted on the gantry and configured to emit an X-ray beam. The CT imaging system even further includes one or more smart sensors integrated with one or more components of the CT imaging system, wherein the one or more smart sensors are configured to monitor for one or more conditions related to the CT imaging system. The CT imaging system still further includes a controller configured to receive feedback from the one or more smart sensors and to adjust scheduling of service on the CT imaging system based on the feedback from the one or more smart sensors.

An absorber mask for shaping a plurality of therapeutic x-rays includes a stack of slices. The stack of slices has a number of x-ray radiation-absorbing slices. The number of x-ray radiation-absorbing slices each have at least one planar layer. Neighboring layers of the stack of slices are applied to one another in a planar manner and in the stack direction by an additive manufacturing method. At least one x-ray radiation-transparent slice and / or at least one x-ray radiation-absorbing strip extending in the width direction is arranged between the number of x-ray radiation-absorbing slices.

Provided is an imaging processing apparatus including a first correcting unit configured to correct, in a case where a first pixel group continuing to a first defect pixel in an image includes a second defect pixel, a value of the second defect pixel by using values of a second pixel group continuing to the second defect pixel, and a second correcting unit configured to correct a value of the first defect pixel by using values of the first pixel group including a value corrected by the first correcting unit.

Systems and methods for analyzing images. The methods comprise using an imaging device to acquire a pre-shot image of a target anatomical area of an individual; analyzing the pre-shot image to assess image quality of one or more regions within the pre-shot image; and determining acquisition parameters for a full-dose image from the one or more measures of image quality. The methods also include acquiring, by the imaging device, a full-dose image using the acquisition parameters determined during analysis of the pre-shot image; and generating a final image from the full-dose image.

A scattered radiation mask for reduction of scattered x-ray radiation, the scattered radiation mask comprising: a stack of slices, wherein the stack of slices has an x-ray radiation-transparent first slice, an x-ray radiation-absorbing second slice and an x-ray radiation-transparent third slice. The first slice, the second slice and the third slice each have at least one planar layer, and neighboring layers of the stack of slices are applied to each other in a planar manner and in a stack direction via an additive manufacturing method.

This invention discloses a head pose detection method, a mobile CT scanner, an electronic device, and a storage medium. The head pose detection method is applied to a mobile CT scanner, which includes a camera within its cavity. The method includes: acquiring a head image based on the camera and detecting the nose region within the head image to obtain a nose region image; performing ellipse recognition on the nose region image to obtain multiple elliptical regions; determining nose feature information based on the multiple elliptical regions; determining the degree of head offset based on the nose feature information; and detecting head pose based on the degree of head offset. This invention's head pose detection method performs ellipse detection on the nose region and extracts nose feature information, achieving head pose detection based on this nose feature information. This solves the problem of traditional head pose estimation methods heavily relying on complete facial key points, making the method simpler and more efficient.

Various methods and systems are provided for calibrating a camera-based feature detection system (81) of an x-ray system (10). The x-ray system has a support surface (20), a gantry (12) operably connected to the support surface (20), and a light source (85) disposed on the gantry (12), wherein the gantry (12) defines a system frame of reference (33). The x-ray system (10) includes a camera (80) spaced apart from the gantry (12) and operably connected to the calibration system (81), the camera (80) defining a camera frame of reference (83) within which the support surface (20) and the gantry (12) are positioned. The calibration system (81) registers the camera frame of reference (83) to the system frame of reference (33) by operating the light source (85) to position an indication (90) on the support surface (20) and acquiring a plurality of camera images of the indication (90) on the support surface (20) and corresponding locations of the indication within the system frame of reference (33).