Abstract: The invention relates to a system and a method for determining a characteristic of a blood vessel portion, which comprises blood including a contrast agent exhibiting resonant absorption of x-ray photons at a specific energy. The system comprises a tunable monochromatic x-ray source (21) emitting x-ray radiation, an x-ray detector device (22) for detecting the x-ray radiation after it has travelled through the blood vessel portion. A control unit (26) varies a tuning of the x-ray source (21) to vary the energy of the x-ray radiation emitted by the x-ray source (21), and an evaluation unit (27) determines a tuning of the x-ray source (21) at which nuclear resonant absorption of the x-ray radiation incident onto the blood vessel portion occurs and estimates the characteristic on the basis of the determined tuning. The characteristic may particularly be the blood velocity in the blood vessel portion.

Abstract: Disclosed herein is a dual energy X-ray imaging apparatus. The dual energy X-ray imaging apparatus includes: an X-ray generator configured to generate a predetermined dose of X-rays; an X-ray detector configured to detect the X-rays received from the X-ray generator; an X-ray filter located between the X-ray generator and the X-ray detector, and configured to filter out part of the generated X-rays so that X-rays of two dose types reach the X-ray detector; and a medical image processing unit configured to generate medical images corresponding to the two dose types recognized by the X-ray detector.

Abstract: A computed tomography device includes, in an embodiment, a gantry including a tunnel-shaped opening, an examination object being introducible into the tunnel-shaped opening for an examination via the computed tomography device; and a radiation protection apparatus to cover the tunnel-shaped opening, the radiation protection apparatus including a first connector and the gantry includes a second connector. In an embodiment, a detachable connection is formable via the first connector and the second connector, to counteract removal of the radiation protection apparatus from the tunnel-shaped opening.

Abstract: Volume data is generated by performing a CT scan with a spherical calibration jig having known dimensions in contact with an object. A profile of the surface shape of the object in the volume data is obtained, and a boundary surface of the spherical calibration jig is calculated from the center coordinates of the spherical calibration jig. A correction value for adjusting a boundary surface of the object determined from the gradient of the profile to the boundary surface of the spherical calibration jig is determined, and the boundary surface of the object is corrected by using the correction value. The shape of the object is determined by using the corrected boundary surface. The precision of measurement X-ray CT can thus be increased by accurately detecting the boundary surface of the object.

Abstract: The disclosure provides a low-dose image reconstruction method and system based on prior anatomical structure difference.

Abstract: Systems and methods for determining one or more target examination parameters is provided. The methods may include obtaining target examination information of a subject and generating one or more initial examination parameters based on the target examination information. The methods may further include obtaining one or more historical examination parameters associated with the subject and updating at least one of the one or more initial examination parameters based on the one or more historical examination parameters to obtain one or more target examination parameters. The one or more target examination parameters may be used for performing a target examination on the subject.

Abstract: According to one embodiment, an X-ray computed tomography apparatus includes an X-ray tube, a photon counting detector, and processing circuitry. The X-ray tube radiates X-rays. The photon counting detector detects the X-rays radiated from the X-ray tube and transmitted through a subject. The processing circuitry adjusts a temperature adjustment amount used for regulating a temperature of the photon counting detector according to an imaging mode.

Abstract: A radiation therapy system comprising a therapeutic radiation system (e.g., an MV X-ray source, and/or a linac) and a co-planar imaging system (e.g., a kV X-ray system) on a fast rotating ring gantry frame. The therapeutic radiation system and the imaging system are separated by a gantry angle, and the gantry frame may rotate in a direction such that the imaging system leads the MV system. The radiation sources of both the therapeutic and imaging radiation systems are each collimated by a dynamic multi-leaf collimator (DMLC) disposed in the beam path of the MV X-ray source and the kV X-ray source, respectively. In one variation, the imaging system identifies patient tumor(s) positions in real-time. The DMLC for the imaging radiation source limits the kV X-ray beam spread to the tumor(s) and/or immediate tumor regions, and helps to reduce irradiation of healthy tissue (e.g., reduce the dose-area product).

Abstract: The present invention relates to a method for the evaluation of tissue gadolinium deposition that offers advantages compared with known methods. Comparison of different gadolinium-based contrast agents (GBCAs) based on retention, organ distribution, washout and safety is facilitated using the methods of the present invention.

Abstract: A processor acquires first-direction and second-direction radiographic images captured by emitting radiation in different directions. The processor derives a bone mineral content for each pixel in the bone portion included in the first-direction and second-direction radiographic images. The processor divides the bone portion included in the first-direction and second-direction radiographic images into a plurality of small regions and derives first and second evaluation results for each small region of the bone portion on the basis of the derived bone mineral content.

Abstract: In described examples, a charge sensitive amplifier (CSA) generates an integrated signal in response to a current signal. A high pass filter is coupled to the CSA and receives the integrated signal and an inverse of an event signal, the high pass filter generates a coarse signal. An active comparator is coupled to the high pass filter and receives the coarse signal and a primary reference voltage signal, the active comparator generates the event signal.

Abstract: An image processing system comprising includes: an acquisition unit that acquires a plurality of projection images obtained by tomosynthesis imaging in which radiation is emitted from a radiation source to a breast at different irradiation angles and a projection image is captured at each irradiation angle by a radiation detector; a tomographic image generation unit that generates a plurality of tomographic images in each of a plurality of tomographic planes of the breast, from the plurality of projection images; a composite two-dimensional image generation unit that generates a composite two-dimensional image from a plurality of images selected from among the plurality of projection images and the plurality of tomographic images; an information generation unit that generates correspondence relationship information representing a correspondence relationship between a position in the composite two-dimensional image and a depth of a tomographic plane corresponding to the position; a display controller that perf

Abstract: Systems and methods for breast x-ray tomosynthesis that enhance spatial resolution in the direction in which the breast is flattened for examination. In addition to x-ray data acquisition of 2D projection tomosynthesis images ETp1 over a shorter source trajectory similar to known breast tomosynthesis, supplemental 2D images ETp2 are taken over a longer source trajectory and the two sets of projection images are processed into breast slice images ETr that exhibit enhanced spatial resolution, including in the thickness direction of the breast. Additional features include breast CT of an upright patient's flattened breast, multi-mode tomosynthesis, and shielding the patient from moving equipment.

Abstract: A baggage cart is disclosed. The baggage cart is used for security inspection in an airport, comprising: a cart body, comprising at least one compartment having a door; and a locking device, coupled to the compartment and configured to lock the compartment in response to receiving an indication signal.

Abstract: Methods, devices, and systems for processing ray data are provided. The methods include: smoothing initial ray data based on collection of a detector of a CT device through at least two time windows to obtain smoothed ray data corresponding to each time window having a different window length, the initial ray data including attenuation values of rays passing through an object to be examined and being obtained at a sampling frequency within a specified time period, determining initial fluctuating data based on the initial ray data and smoothed ray data corresponding to one of the time windows, the initial fluctuating data being associated with a fluctuation due to occlusion of the rays by a collimator of the CT device, and removing the fluctuation from the initial ray data to obtain target ray data based on the smoothed ray data corresponding to each time window and the initial fluctuating data.

Abstract: A radiation detector module includes a frame, a module circuit board connected to the frame, detector units that each include radiation sensors disposed above the frame and electrically connected to the module circuit board, and an optically and infrared radiation opaque, X-ray transparent, electrically insulating detector shield covering a top surface and at least one side surface of the radiation sensors.

Abstract: A flexible digital radiographic detector assembly uses a conformable bag having granular media therein to enclose the detector and to help fit the detector onto a curved object. The conformable bag is evacuated to hold the detector against the object to be imaged. An image of the object is acquired by aiming x-rays through the object toward the detector.

Abstract: A display control unit displays, on a display unit, at least some of a plurality of images included in each of a plurality of image sets of the same object which have been captured at different imaging dates and times and each of which consists of the plurality of images including at least a plurality of tomographic images acquired by performing tomosynthesis imaging for the object. A setting unit sets at least one past image set, which was acquired at an imaging date and time before the latest imaging date and time and includes images at least some of which have been displayed, among the plurality of image sets as having been displayed.

Abstract: X-ray backscatter imaging (XBI) methods and systems are provided that enable depth-sensitive information to be obtained from images acquired during a single scan from a single side of an object being imaged. The depth-sensitive information is used in combination with other image information acquired during the scan to produce high-resolution 2-D or 3-D images, where at least one of the dimensions of the 2-D or 3-D image corresponds to depth in the object.

Abstract: A computed tomographic (CT) system includes a gantry having a rotating part including a light source, a light source drive control circuit, a rechargeable battery, and a rotating part interface. The gantry includes a detector, a detector control and signal processing circuit, and an image memory. The rotating part may rotate around a central axis. The CT system includes a gantry table on which the gantry is mounted and which includes a host interface. The CT system includes a motor that may cause the gantry to move within a gantry moving range, and a control unit that may process and display image data obtained from the gantry. The rotating part interface may face the host interface, such that the rotating part and host interfaces are configured to be electrically connected with each other, based on the gantry being at a predetermined position within the gantry moving range.