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Timing algorithm for bolus chase MR digital subtraction angiography

✍ Scribed by Yi Wang; Howard M. Lee; Rosalynn Avakian; Priscilla A. Winchester; Neil M. Khilnani; David Trost

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
806 KB
Volume
39
Category
Article
ISSN
0740-3194

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✦ Synopsis

Abstract

Acquire multiple longitudinal locations in the lower extremity after a single contrast injection, appropriate table translation and contrast injection are required. An approximate model based on constant bolus velocity was developed to describe the space‐time course of a contrast bolus in the lower extremity. This model was verified in dynamic MR angiograms acquired in a group of patients using time‐resolved 2D MR digital subtraction angiography (MRDSA). From this contrast bolus passage model, a timing algorithm for table translation and contrast injection was developed for bolus chase MRDSA, subsequently validated in bolus chase 2D MRDSA experiments. All targeted major peripheral arteries were well depicted in bolus chase 2D MRDSA using this timing algorithm and a single 15‐ml contrast dose.

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