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Radiation dose based imaging detector tile parameter compensation

A technology of detectors and detector pixels, applied in radiation measurement, instruments, etc.

Active Publication Date: 2012-09-05
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Unfortunately, the varying response of operating parameters can cause artifacts to be introduced into the image data

Method used

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  • Radiation dose based imaging detector tile parameter compensation
  • Radiation dose based imaging detector tile parameter compensation
  • Radiation dose based imaging detector tile parameter compensation

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Embodiment Construction

[0019] figure 1 An imaging system 100 such as a computed tomography (CT) scanner is illustrated. Imaging system 100 includes a generally stationary gantry 102 and a rotating gantry 104 . A rotating gantry 104 is rotatably supported by the stationary gantry 102 and rotates about an examination region 106 about a longitudinal or z-axis. A radiation source 108 , such as an X-ray tube, is supported by and rotates with the rotating gantry 104 and emits radiation through the examination region 106 .

[0020] The radiation sensitive detector array 112 subtends an angular arc across the examination region 106 opposite the radiation source(s) 108 and detects radiation passing through the examination region 106 . In the illustrated embodiment, the radiation-sensitive detector array 112 includes a plurality of detector modules 114 arranged relative to each other along a direction transverse to the z-axis. As shown, the detector module 114 includes a plurality of detector mosaics or ti...

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Abstract

A detector tile (116) of an imaging system (100) includes a photosensor array (204) and electronics (208) electrically coupled to the photosensor array (204), wherein the electronics includes a dose determiner (402) that determines a deposited dose for the detector tile (116) and generates a signal indicative thereof. In one non-limiting instance, this signal is utilized to correct parameters such as gain and thermal coefficients, which may vary with radiation dose.

Description

technical field [0001] The following generally relates to compensating various operating parameters of detector tiles based on deposited dose, and the following has particular application in computed tomography (CT). However, it is also suitable for other medical imaging applications as well as non-medical imaging applications. Background technique [0002] Computed tomography (CT) scanners include an X-ray tube mounted on a rotatable gantry that rotates around the examination area about a longitudinal or z-axis. The X-ray tube emits ionizing radiation through the examination region and the subject or object therein. The detector array subtends an angular arc relative to the x-ray tube opposite the examination region. A detector array detects radiation passing through the examination region and generates a signal indicative of the radiation. A reconstructor reconstructs volumetric image data indicative of the signal. The volumetric image data can be further processed to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T7/00
CPCG01T7/005
Inventor M·A·查波R·P·卢赫塔R·A·马特森
Owner KONINKLIJKE PHILIPS ELECTRONICS NV