Toshiba Medical Systems Corporation

Liang Cai

Miesher Rodrigues

Hao Yang

Gin Chung Wang

Alan Karr

A computed tomography (CT) detector apparatus includes a plurality of detector arrays arranged in a ring, wherein for at least one array that includes a plurality of elements, an anode pixel pattern is non-uniform in a z-axis direction and a thickness of each element in the array is correspondingly non-uniform along the z-axis direction. A size of the anode pixels increases proportionally away from a center of the array, and a thickness of the elements increases away from the center of the array. The ratio of the thickness of the element to the size of the anode pixels is substantially the same over the array.

Non-uniform photon-counting detector array on a fourth-generation ring to achieve uniform noise and spectral performance in Z-direction

A computed tomography (CT) detector apparatus to increase energy resolution at a high count rate includes a plurality of fixed photon-counting detector (PCD) modules arranged in a ring, each PCD module including two Parallel-Transverse-Field (PTF) PCDs that are tilted with respect to a normal direction to a circumferential direction of the ring. Each PTF PCD includes a rectangular semiconductor crystal having a first face and a second face, wherein the first face and the second face are parallel, a cathode side including a cathode electrode covering the first face, and an anode side including a plurality of anode pixels on the second face. Each PTF PCD includes a collimator attached to a predetermined region of the PTF PCD, wherein the collimator blocks incident the X-rays.

Parallel transverse field (PTF) tilted and collimated detectors

A computed tomography (CT) detector apparatus includes a plurality of detectors arranged in a ring, each detector being arranged inside a Faraday cage having a plurality of voltage-biased side-electrodes arranged on a side surface of the Faraday cage. The detectors include photon-counting detectors (PCDs). A voltage applied to the voltage-biased side-electrodes decreases from the anode side of the PCD to the cathode side of the PCD.

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Liang Cai