Comparison of low-contrast detail perception on storage phosphor radiographs and digital flat panel detector images

A contrast detail analysis was performed to compare perception of low-contrast details on X-ray images derived from digital storage phosphor radiography and from a flat panel detector system based on a cesium iodide/amorphous silicon matrix. The CDRAD 2.0 phantom was used to perform a comparative co...

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Bibliographic Details
Published in:IEEE transactions on medical imaging 2001-03, Vol.20 (3), p.239-242
Main Authors: Peer, S., Neitzel, U., Giacomuzzi, S.M., Peer, R., Gassner, E., Steingruber, I., Jaschke, W.
Format: Article
Language:English
Subjects:
Amorphous silicon
Biological and medical sciences
Humans
Image analysis
Image processing
Image storage
Imaging phantoms
Investigative techniques, diagnostic techniques (general aspects)
LCDs
Liquid crystal displays
Medical sciences
Miscellaneous. Technology
Observer Variation
Performance analysis
Phantoms, Imaging
Phosphors
Radiodiagnosis. Nmr imagery. Nmr spectrometry
Radiographic Image Enhancement - methods
Radiography
Silicon
X-ray detection
X-ray detectors
X-ray imaging
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Summary:A contrast detail analysis was performed to compare perception of low-contrast details on X-ray images derived from digital storage phosphor radiography and from a flat panel detector system based on a cesium iodide/amorphous silicon matrix. The CDRAD 2.0 phantom was used to perform a comparative contrast detail analysis of a clinical storage phosphor radiography system and an indirect type digital flat panel detector unit. Images were acquired at exposure levels comparable to film speeds of 50/100/200/400 and 800. Four observers evaluated a total of 50 films with respect to the threshold contrast for each detail size. The numbers of correctly identified objects were determined for all image subsets. The overall results show that low-contrast detail perception with digital flat panel detector images is better than with state of the art storage phosphor screens. This is especially true for the low-exposure setting, where a nearly 10% higher correct observation ratio is reached. Given its high detective quantum efficiency the digital flat panel technology based on the cesium iodide scintillator/amorphous silicon matrix is best suited for detection of low-contrast detail structures, which shows its high potential for clinical imaging.
ISSN:0278-0062
1558-254X
DOI:10.1109/42.918474