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Timing algorithm for bolus chase MR digital subtraction angiography
Author(s) -
Wang Yi,
Lee Howard M.,
Avakian Rosalynn,
Winchester Priscilla A.,
Khilnani Neil M.,
Trost David
Publication year - 1998
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.1910390504
Subject(s) - bolus (digestion) , digital subtraction angiography , angiography , algorithm , nuclear medicine , medicine , subtraction , radiology , computer science , mathematics , surgery , arithmetic
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.