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Significant Gastric Reflux of Technetium-99m-MIBI in SPECT Myocardial Imaging

Department of Medical Physics and Bioengineering, University Hospital of Wales, Cardiff, Wales
Department of Radiology, Princess of Wales Hospital, Bridgend, Wales

Correspondence: For correspondence or reprints contact: Gordon W. Middleton MSc, Department of Medical Physics and Bioengineering, University Hospital of Wales, Health Park, Cardiff, CF4 4XW, Wales, UK.

ABSTRACT

We present a case in which significant gastric reflux of ^99mTc-methoxy isobutylisonitrile (MIBI) was observed in a patient who underwent stress/rest ^99mTc-MIBI SPECT myocardial perfusion imaging for suspected coronary artery disease. The intense gastric activity partially obscured myocardial uptake of ^99mTc MIBI, particularly in the inferolateral wall of the left ventricle. The presence of significant gastric activity should be considered when performing SPECT myocardial imaging with ^99mTc MIBI, and, where necessary, steps should be taken to minimize this activity prior to commencing acquisition.

Key Words: technetium-99m-MIBI • gastric reflux • myocardial imaging • SPECT

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