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Supine and prone SPECT Tc-99m MIBI myocardial perfusion imaging for dipyridamole studies
R Lisbona1, L Dinh, V Derbekyan
1Department of Nuclear Medicine, Royal Victoria Hospital, Montreal, Canada.
Clinical Nuclear Medicine
|August 1, 1995
Abstract:
Aartifactual inferior wall defects of perfusion are a source of frequent concern during TI-201 exercise stress redistribution SPECT imaging in the supine position. These artifactual changes also affect Tc-99m sestamibi dipyridamole myocardial perfusion studies with supine SPECT yielding a specificity of only 58% for right coronary artery (RCA) disease. Complementary SPECT prone imaging will enhance this specificity for inferior wall abnormalities to 79% (P < 0.05) and is recommended for more accurate assessment of RCA stenosis, whether the patient challenge is pharmacological or by exercise.