X-ray dose compensation method and X-ray computed tomography apparatus

A dose compensation and X-ray technology, applied in X/γ/cosmic radiation measurement, radiation measurement, computerized tomography scanner, etc., can solve the problems of SNR deterioration, reconstructed image noise increase, severe and other problems, to improve SNR Effect
CN1757378AInactive Publication Date: 2006-04-12GE MEDICAL SYST GLOBAL TECH CO LLC
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
GE MEDICAL SYST GLOBAL TECH CO LLC
Publication Date
2006-04-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention provides an X-ray dose compensation method for X-ray dose compensation of the detector signals from a multiple array detector with improved SNR, used for the detector signal detected by using the multiple array detector in which a plurality of X-ray detector channels placed in one dimensional array in the channel direction is stacked in a plurality of rows in the row direction to form X-ray detector channels of two dimensional matrix. A plurality of specific X-ray detector channels in the multiple array detector or X-ray planar detector or X-ray image intensifier are used as the X-ray dose reference channels for the X-ray dose compensation by means of signal sum or mean of detector signals from those X-ray dose reference channels.
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Description

technical field

[0001] The present invention relates to an X-ray dose compensation method and an X-ray CT (Computer Computed Tomography) that compensates the X-ray dose by using an X-ray detection signal detected by a multi-array detector or an X-ray plane detector or an X-ray image intensifier (I.I.). Tomography) apparatus, more particularly to an X-ray dose compensation method and an X-ray CT apparatus capable of improving the SNR (signal-to-noise ratio) of X-ray tomography in all scanning modes including conventional scanning and helical scanning. The multi-array detector here includes multiple lines of multiple X-ray detection channels arranged one-dimensionally along the channel direction. Background technique

[0002] An X-ray CT device using a multi-array detector usually contains an X-ray dose detection channel, that is, an X-ray dose reference channel in each row, so that the reference channel of each row independently compensates the X-ray dose of the main detector...

Claims

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