New solid-state x-ray imagers known as digital flat-panel x-ray detectors are about to be launched in the field of medical diagnostics. The combination of active-matrix technologies developed for active-matrix liquid-crystal displays and x-ray detection materials constitutes the basis of the detectors. Recently, two kinds of direct-conversion detectors have been developed in order to improve their performance. One is a detector using a thick x-ray photoconductor (∼1 mm) made of amorphous selenium, and the other is a novel hybrid panel detector using an x-ray photoconductor made of polycrystalline Cd(Zn)Te. As a result, excellent resolution and good linear sensitivity have been achieved. These detectors have great promise as next-generation digital imaging systems for fluoroscopy and radiography.
[1]
J A Rowlands,et al.
X-ray imaging using amorphous selenium: feasibility of a flat panel self-scanned detector for digital radiology.
,
1995,
Medical physics.
[2]
Jean-Pierre Moy,et al.
Large area X-ray detectors based on amorphous silicon technology
,
1999
.
[3]
A. Shor,et al.
CdTe and CdZnTe materials for room-temperature X-ray and gamma ray detectors
,
1998
.
[4]
Shirley S. Chu,et al.
13.4% efficient thin‐film CdS/CdTe solar cells
,
1991
.
[5]
J A Rowlands,et al.
Digital radiology using active matrix readout of amorphous selenium: detectors with high voltage protection.
,
1998,
Medical physics.
[6]
T. Schlesinger,et al.
Semiconductors for room temperature nuclear detector applications
,
1995
.