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Abnormal extrapulmonary accumulation of 99mTc-MAA during lung perfusion scanning
1Department of Radiology, Yamaguchi University School of Medicine, Japan.
Annals of Nuclear Medicine
|November 1, 1995
Summary
Abnormal lung perfusion scans using 99mTc-MAA can reveal extrapulmonary accumulation, indicating unusual hemodynamics like right-to-left shunts. This finding is crucial for diagnosing conditions such as lung cancer and congenital heart disease.
Area of Science:
- Nuclear Medicine
- Radiology
- Cardiovascular Imaging
Background:
- Lung perfusion scintigraphy with 99mTc-MAA is standard for assessing pulmonary blood flow.
- Extrapulmonary accumulation of 99mTc-MAA on these scans is an uncommon finding.
- This finding suggests abnormal vascular pathways or shunts outside the lungs.