Multiple mode digital X-ray imaging system

Details Multiple mode digital X-ray imaging system Multiple mode digital X-ray imaging system

1997-11-25

1999-10-19

Bruce, David Vernon

X-ray or gamma ray systems or devices

Specific application

Absorption

378 988, G01N 2304

Patent

active

059701153

ABSTRACT:
A multiple mode digital X-ray imaging system providing for preprocessing "binning" of analog pixel signals from a detector array by selectively summing, within the detector array, adjacent pixel charges on a row-by-row basis and selectively summing, within detector array readout circuits, the previously summed pixel charges (by rows) on a column-by-column basis. An array, or mapping, of "defective pixel" flags is used to identify defective pixels within the detector array, with such flags being added to, or inserted into, the incoming data stream for dynamic processing along with the incoming pixel data. A buffer and filter is used to perform still image capture during the radiographic mode of operation and to recursively filter incoming data frames during the fluoroscopic mode of operation by summing a scaled amount of pixel data from prior data frames with a scaled amount of incoming pixel data from the present data frame.

REFERENCES:
patent: 5465284 (1995-11-01), Karellas
patent: 5506880 (1996-04-01), Scardino et al.
patent: 5657400 (1997-08-01), Granfors et al.
patent: 5864146 (1999-01-01), Karellas

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