A multiple frame x-ray imaging system is disclosed with capability of differential x-ray exposure of different input areas of an image intensifier or other x-ray detector. Collimators are provided to control the amount of radiation in various regions of the image and image processing is provided to provide the display of images of different qualities.

A fixture for a fluoroscopic x-ray imaging system is discussed, wherein the fluoroscopic imaging system includes a C-arm, an x-ray source at a first end of the C-arm, and an x-ray detector at a second end of the C-arm. The fixture includes a processor and memory coupled with the processor. The memory includes instructions that are executable by the processor so that the processor is configured to detect an x-ray emission from the x-ray source toward the x-ray detector, determine an offset of the x-ray source relative to the x-ray detector responsive to detecting the x-ray emission, and provide an indication of the offset of the x-ray source to a medical navigation system. Related methods and robotic systems are also discussed.

An apparatus for determining material property, includes: an interface configured to obtain a first HU value associated with a first image of an object, and to obtain a second HU value associated with a second image of the object, wherein the first image is created using a first energy having a first energy level, and wherein the second image is created using a second energy having a second energy level that is different from the first energy level; and a processing unit configured to determine a weighted property value for the object based at least in part on the first HU value and the second HU value.

The invention relates to a test body for checking the transmission properties of volume tomographs, in particular radiological tomographs, which comprises several plates (2) that are connected to form a stack, in which adjacent plates (2) contact each other and said body comprises spheres (4) made of at least one material that is different from the plates (2) and having different diameters, wherein the respective spheres (4) are arranged in and/or between at least some of the plates (2), and wherein on/in the test body, preferably in the stack, at least one rod-shaped hollow profile, in particular at least one pipe having a circular cross section, is arranged. The invention further relates to a method for checking the transmission properties of a tomograph using such a test body (1).

Disclosed are a mammography system and a mammography imaging method that can prevent a subject from being exposed to radiation more than necessary by setting an optimum imaging condition according to a thickness of a subject's breast, and can obtain a high-quality medical image by setting an optimum FOV and correcting projection data according to the thickness of the breast. The mammography system includes: a mammography imaging device including a detector and an X-ray tube, and obtaining X-ray image data of a subject's breast from multiple angles; a thickness obtaining unit obtaining information on a thickness of the breast; and a rotation angle calculator calculating a rotation angle range of the X-ray tube, based on the information of the thickness of the breast, wherein the mammography imaging device obtains the X-ray image data from multiple angles by performing radiography while rotating the X-ray tube within the rotation angle range.

Methods for the correction of drive, tilt and scanning speed errors in imaging systems such as CT machines.

Provided herein is a phantom and a phantom system, the phantom including a plurality of blocks combined having different elastic modulus, and thus may be easily manufactured in various shapes, movements, and densities and may exactly imitate movements of a tissue such as in a lung that has high volume change rates and has a high possibility that a position and shape of a tumor may change, thereby providing an effect of being used in replacement of patients when evaluating 4D-CT performance and measuring radiation amounts.

There is provided a method and corresponding system and apparatus for image reconstruction based on image data from a photon-counting multi-bin x-ray detector. The method includes determining (S1) parameter(s) of a given functional form of the relationship between comparator settings expressed in voltage in the read-out chain of the x-ray detector and the corresponding energy threshold values expressed in energy based on a fitting procedure between a first set of data representative of a measured pulse height spectrum and a second set of data representative of a reference pulse height spectrum. The method also includes performing (S2) image reconstruction based on the image data and the determined parameter(s). In this way, efficient high-quality image reconstruction can be achieved.

A respiratory gating phantom device includes a first airbag, a second airbag, a first catheter, a second catheter, a fixture, and an air pressure gating device. The first catheter and the second catheter are respectively installed in the first airbag and the second airbag. The fixture is provided with a phantom tumor and adjustably installed in the first catheter or the second catheter, thereby installing the phantom tumor in the first catheter or the second catheter. The air pressure gating device, connected to the first airbag and the second airbag, inflates and deflates the first airbag and the second airbag to simulate breathing. The first catheter and the second catheter respectively move along three-dimensional direction and two-dimensional direction in response to motions of the first airbag and the second airbag.

Pose of an ultrasound transducer is recovered. In one approach, inertial measurement units are positioned on the ultrasound transducer. The measurements from the inertial measurement units are used with pose or measurements from another position sensor (e.g., x-ray, electromagnetic, or optical) to improve accuracy and/or provide pose information at a greater rate. In another approach, a curve, line, or other connected shape of light emitting diodes are incorporated into the transducer. Optical tracking, with a filter specific to the light emitting diodes, using the connected shape pattern is used to determine the pose.