Method for obtaining image data with a tomographic apparatus

Details Method for obtaining image data with a tomographic apparatus Method for obtaining image data with a tomographic apparatus

1987-03-11

1989-02-28

Smith, Jerry

Boots, shoes, and leggings

364571, 378901, G06F 1542

Patent

active

048091723

ABSTRACT:
A method for obtaining image data for a target object with a tomographic apparatus in order to reconstruct a tomographic image of the target object. The method includes the step of determining correction constants for each detector of the tomographic apparatus.
The correction constants are determined as a function of the difference in performance of the tomagraphic apparatus when performing an air-wedge scan and when scanning a reference object. After the target object has been scanned, and the target object data calibrated against air-wedge scan data, the target object data is corrected using the correction constants. Data representing the difference between the calibrated target object data and the correction constants is used to reconstruct a tomographic image of the target object. The case where the target object is a human patient and the reference object is a water cylinder is considered. Use of the correction constants avoids the repeated scanning of water cylinders in order to calibrate the target object data.

REFERENCES:
patent: 4458358 (1984-07-01), Klausz
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patent: 4626991 (1986-12-01), Crawford
patent: 4654795 (1987-03-01), Shimoni
patent: 4654796 (1987-03-01), Takagi
patent: 4707786 (1987-11-01), Dehner
patent: 4712178 (1987-12-01), Tny
patent: 4714997 (1987-12-01), Crawford
patent: 4728791 (1988-03-01), Goto

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