Radiopharmaceutical uptake within breast tissue may be symmetric (e.g., lactating breasts, gynecomastia) or asymmetric/focal (e.g., malignancy). Breast tissue is often a source of soft-tissue attenuation artifact which can create either fixed or reversible perfusion defects; attention to consistent breast position during rest and stress imaging sessions is important. Breast attenuation artifact typically includes the basal anterior wall, has a sharp crescentic border, and may spare the apex unlike the pattern seen with severe LAD coronary artery disease.
KeywordsReversible Perfusion Defect Attenuation Artifact Normal Wall Motion Fixed Perfusion Defect 99mTc Sestamibi
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