Combined Supine-Prone Myocardial Perfusion Imaging: Enhancing Diagnostic Accuracy

Area of Science:

• Nuclear Cardiology
• Medical Imaging

Background:

• SPECT myocardial perfusion imaging (MPI) is crucial for diagnosing coronary artery disease.
• Supine-only imaging can be limited by attenuation artifacts, particularly in the inferior and anterior walls.
• These artifacts may be misinterpreted as true perfusion defects, reducing diagnostic accuracy.

Purpose of the Study:

• To evaluate the benefits of a combined supine-prone imaging protocol for SPECT MPI.
• To assess the ability of prone imaging to differentiate true perfusion defects from attenuation artifacts.
• To determine the impact of this protocol on diagnostic specificity and accuracy.

Main Methods:

• Patients underwent standard supine SPECT MPI.
• Prone imaging was added when perfusion defects were identified on supine images.
• Comparison of supine and prone images was performed to identify artifacts versus true defects.

Main Results:

• The supine-prone protocol effectively distinguished attenuation artifacts from true myocardial perfusion defects.
• This differentiation led to improved specificity and diagnostic accuracy.
• The additional time for prone imaging was significantly less than standard supine imaging (20%-40% reduction).

Conclusions:

• Combined supine-prone SPECT MPI is a valuable protocol for enhancing diagnostic accuracy.
• It offers substantial benefits, especially for labs without attenuation correction technology.
• Implementation optimizes patient care by providing more reliable perfusion assessments.