Abstract:
:The line spread function (LSF) and modulation transfer function (MTF) of 9 rare-earth screen/film systems were measured and compared with those of two fast calcium tungstate systems, using double-emulsion films sandwiched between two screens and mounted in regular cassettes. The LSFs were found to fit exponential functions. These results indicate that the increased sensitivity of rare-earth phosphors over calcium tungstate can be used to construct screens with a higher MTF or increased speed. The fast rare-earth systems allow the use of smaller focal spots for increased resolution while reducing the radiation dose to the patient.
journal_name
Radiologyjournal_title
Radiologyauthors
Arnold BA,Eisenberg H,Bjärngard BEdoi
10.1148/121.2.473subject
Has Abstractpub_date
1976-11-01 00:00:00pages
473-7issue
2eissn
0033-8419issn
1527-1315journal_volume
121pub_type
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