Quantitative digital subtraction angiography: two scanning techniques for correction of scattered radiation and veiling glare. Work in progress.

Abstract:

:Scattered radiation and veiling glare in digital subtraction angiography degrade contrast signals in a nonlinear and nonuniform way. This effect prohibits direct use of image data for accurate iodine measurement or energy subtraction imaging. Two techniques based on the use of scanning lead bars were proposed to measure the spatial distribution of scattered radiation and veiling glare in the unprocessed image data. With either technique, signals behind the lead bars were used to estimate the scatter-glare component and remove it from the image data. The scanning-lead-bar techniques can be used to reduce the scatter-glare component by a factor of up to 10. The scatter-glare correction leads to the recovery of degraded contrast signals and achieves reasonable linearity, uniformity, and consistency in the contrast measurement.

journal_name

Radiology

journal_title

Radiology

authors

Shaw CG,Plewes DB

doi

10.1148/radiology.157.1.3898220

subject

Has Abstract

pub_date

1985-10-01 00:00:00

pages

247-53

issue

1

eissn

0033-8419

issn

1527-1315

journal_volume

157

pub_type

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