Two different prototype high resolution digital x-ray radiographic imaging systems employing planar array charge-coupled device detectors have been constructed. Both proto-type imaging units have an ultimate resolution capability of at least 10 line pairs/mm. Each system employs a standard 20 x 30 cm x-ray intensifying phosphor screen as the input receptor. One unit operates as a scanning system utilizing a specially manufactured planar array (244 x 380 elements) operating in a time delay and integration mode (TDI). The other system employs a static array (640 x 1024 15 micron square pixels) operating in "snapshot" read out mode. Our studies utilizing these devices with standard clinical radiation exposures have shown a significant improvement in the visualization of low contrast objects in radiographic phantoms and both units have an ultimate resolution capability of at least 10 line pairs/mm.
[1]
David Gur,et al.
X-Ray Imaging With Two-Dimensional Charge-Coupled Device (CCD) Arrays
,
1984,
Medical Imaging.
[2]
R E Latchaw,et al.
Diode array digital radiography: initial clinical experience.
,
1982,
AJR. American journal of roentgenology.
[3]
A Fenster,et al.
Scanned-projection digital mammography.
,
1987,
Medical physics.
[4]
Morley Blouke,et al.
Charge-coupled devices in astronomy
,
1982
.
[5]
R T Droege,et al.
A practical method to routinely monitor resolution in digital images.
,
1983,
Medical physics.
[6]
K Doi,et al.
Image feature analysis and computer-aided diagnosis in digital radiography. I. Automated detection of microcalcifications in mammography.
,
1987,
Medical physics.