Hybrid detection systems and methods for C-arm interventional x-ray systems are provided. The hybrid detection system can have a changeable x-ray detection system that is coupled to an integrated within a C-arm x-ray imaging system. The changeable x-ray detector system can include an energy-integrating x-ray detector, and a photon-counting x-ray detector. The C-arm x-ray imaging system using only one detector at a time to acquire x-ray imaging data.

Described here are systems and methods for optimization techniques for automatically selecting x-ray beam spectra, energy threshold, energy bin settings, and other imaging technique parameters for photon-counting detector computed tomography (“PCCT”). The techniques described here are generally based on subject or object size, material of interest, and location of the target material. Advantageously, the optimizations can be integrated with different PCCT systems to automatically select optimal imaging technique parameters before scanning a particular subject or object.

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.

The present invention relates to an X-ray detector (10) comprising two or more scintillator layers, comprising: a first scintillator layer (20); a second scintillator layer (30); a first photodiode array (40); a second photodiode array (50); and at least one light emitting layer (60). The first scintillator layer is configured to absorb X-rays from an X-ray pulse and emit light. The first photodiode array is positioned adjacent to the first scintillators layer. The first photodiode array is configured to detect at least some of the light emitted by the first scintillator layer. The second scintillator layer is configured to absorb X-rays from the X-ray pulse and emit light. The second photodiode array is positioned adjacent to the second scintillator layer. The second photodiode array is configured to detect at least some of the light emitted by the second scintillator layer. The at least one light emitting layer is 10 configured to emit radiation such that at least some of the emitted radiation irradiates the first photodiode array and at least some of the emitted radiation irradiates the second photodiode array.

According to one embodiment, an X-ray diagnostic apparatus includes an X-ray irradiator, a scatterer, a grid, and a detector. The X-ray irradiator irradiates X-rays. The scatterer is provided between the X-ray irradiator and an object, that scatters the irradiated X-rays. The grid is provided between the scatterer and the object, that transmits the scattered X-rays within a predetermined angular range. The detector detects X-rays transmitted through the object together with an incident angle of the X-rays.

Methods, systems, and apparatus for performing spectral tomographic reconstruction of an object. The imaging system includes a power source that is configured to provide a variable high voltage. The imaging system includes a distributed X-ray source. The distributed X-ray source includes an array of X-ray emitters that allows fast switching “ON” and “OFF” using X-ray emitter grid electrode. The distributed X-ray sources is configured to generate an X-ray beam with an energy spectrum based on the variable high voltage and uses additional X-ray filters. The imaging system includes a controller. The controller is configured to operate synchronously with the change of the variable high voltage. The controller is configured to control a timing of when to engage an X-ray emitter of the array of X-ray emitters of the distributed X-ray source based on a predefined firing pattern.

A method and apparatus for x-ray fluorescence measurement in object (1) are disclosed. The method includes (a) producing x-ray beam (2) using source device (10), wherein beam extends through object parallel to a first projection direction, (b) irradiating object with beam at scan positions in first projection plane, which are set by scanning device (20) such that source device and object are moved relative to one another, (c) detecting x-ray radiation emitted from object using detector array device (30) securely connected to source device and including spectrally selective detector elements (31) arranged to detect radiation, and stop lamellas (32) extending in radial directions relative to beam direction shielding detector elements from radiation scattered in object and arranged such that detector elements are able to detect radiation from all locations, and (d) processing detector signals to capture x-ray fluorescence of target particles in radiation and to localize target particles in object.

One embodiment is circuitry for implementing a baseline restoration (“BLR”) circuit for a photon-counting computed tomography (“PCCT”) signal chain, the circuitry comprising a multi-level discriminator circuit for receiving a shaper voltage from the PCCT signal chain, the discriminator circuit outputting a digital signal indicative of one of a range of voltages within which the shaper voltage falls; a digital-to-analog converter (“DAC”) connected to receive the digital signal output from the discriminator circuit, the DAC converting the received digital signal to a corresponding active reference voltage; and a feedback circuit that injects a cancellation current proportional to the difference between the shaper voltage and the active reference voltage at the input of the PCCT signal chain.

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.

An apparatus, for dose measurement designed for use in an x-ray device, is disclosed. In an embodiment, the apparatus includes a mirror element designed to inject a light field into an x-ray beam penetrating through the mirror element; and a measuring device to measure radiation-induced changes to a carrier material. The carrier material is part of the mirror element and/or another component of the apparatus, which lies in the radiation field of the x-ray device when used normally in an x-ray device. A corresponding method for dose measurement and to an x-ray device is also disclosed.