Investigation of transmolybdenum fluorescent anodes for mammography
Recent work has suggested a new approach to film/screen mammography through the use of transmolybdenum (Z > 42) fluorescent anodes. An experimental rhodium (Z = 45) anode with K emission at 20.0 - 23.2 keV has been compared to a conventional molybdenum anode. Previous spectral measurements have indicated a dose advantage for the Rh anode but no comparison of contrast has been made. A series of step wedges of different materials was imaged at several kVp and for several phantom thicknesses. The resulting data permits quantitative comparison of the radiographic contrast. At 40 kVp for an equivalent tissue thickness of 4.8 cm the radiographic contrast provided by the Rh anode is at least equal to and under some conditions actually superior to that provided by a Mo anode. © 1980 SPIE.
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Citation
Published In
DOI
EISSN
ISSN
Publication Date
Volume
Start / End Page
Related Subject Headings
- 5102 Atomic, molecular and optical physics
- 4009 Electronics, sensors and digital hardware
- 4006 Communications engineering