Abstract:
:The imaging performance of new high-strip-density (HSD) grids having 57 lines/cm was compared with that of conventional low-strip-density (LSD) grids having 33 or 40 lines/cm. The unique advantage of HSD grids is that, under most standard radiographic conditions, the grid lines are not noticeable on the final image, even if the grid is stationary. This is due to the combined effect of the high fundamental spatial frequency of HSD grids, the modulation transfer function of screen-film systems and of the human visual system, and scattered radiation. Monte Carlo simulation studies, phantom images, and clinical evaluation indicate that HSD grids can provide contrast improvement factors and Bucky factors that are comparable to or slightly better than those obtained with LSD grids. Therefore, it may now be possible to eliminate moving Bucky trays from radiographic tables and fluoroscopic devices.
journal_name
Radiologyjournal_title
Radiologyauthors
Doi K,Frank PH,Chan HP,Vyborny CJ,Makino S,Iida N,Carlin Mdoi
10.1148/radiology.147.2.6340160subject
Has Abstractpub_date
1983-05-01 00:00:00pages
575-82issue
2eissn
0033-8419issn
1527-1315journal_volume
147pub_type
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