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Quantitative stress-redistribution thallium-201 SPECT using prone imaging: methodologic development and validation.

H Kiat1, K F Van Train, J D Friedman

  • 1Department of Medicine (Division of Cardiology), Cedars-Sinai Medical Center, University of California School of Medicine, Los Angeles 90048.

Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine
|August 1, 1992
PubMed
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Prone 201Tl myocardial perfusion SPECT imaging significantly reduces patient motion and diaphragmatic attenuation. This technique improves diagnostic accuracy for coronary artery disease, offering an alternative for patients unable to undergo supine imaging.

Area of Science:

  • Nuclear Cardiology
  • Medical Imaging

Background:

  • Diaphragmatic attenuation can reduce left ventricular inferior wall counts in supine myocardial perfusion SPECT.
  • Prone imaging may mitigate attenuation artifacts and improve image quality.

Purpose of the Study:

  • To develop and prospectively apply quantitative normal limits for prone 201Tl myocardial perfusion SPECT.
  • To evaluate the diagnostic performance and assess patient motion in prone SPECT compared to supine SPECT.

Main Methods:

  • Quantitative normal limits for prone SPECT were established and applied to 36 patients undergoing coronary angiography.
  • Patient motion was compared between 200 prone and 200 supine SPECT studies.
  • A prone imaging table with a cardiac cut-out was utilized, increasing myocardial counts.

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Main Results:

  • Prone SPECT demonstrated high overall sensitivity (93%) and specificity (80%) for detecting coronary artery disease.
  • Incidence of mild and severe patient motion was significantly lower in prone (3.5% and 0%) compared to supine (12% and 4%) imaging.
  • Improved inferior wall and septal counts were observed in prone SPECT, despite increased camera-to-chest distance.

Conclusions:

  • Prone 201Tl myocardial perfusion SPECT is a valuable tool for improving image quality and reducing motion artifacts.
  • It offers an effective alternative for patients with diagnostic dilemmas due to attenuation or motion on supine imaging.