Simultaneous dual-radionuclide myocardial perfusion imaging with a solid-state dedicated cardiac camera

Area of Science:

• Nuclear Cardiology
• Medical Imaging Technology

Background:

• Conventional SPECT MPI involves separate stress and rest acquisitions, increasing patient time and resource utilization.
• Advancements in cardiac camera technology aim to improve efficiency and diagnostic accuracy in myocardial perfusion imaging.

Purpose of the Study:

• To compare simultaneous dual-radionuclide (DR) stress and rest myocardial perfusion imaging (MPI) using a novel solid-state cardiac camera (D-SPECT) against conventional SPECT MPI.
• To evaluate the diagnostic performance, image quality, and acquisition time of the D-SPECT system.

Main Methods:

• 24 patients underwent simultaneous DR MPI with (201)Tl (rest) and (99m)Tc-MIBI (stress) on a D-SPECT scanner, alongside conventional SPECT MPI.
• Acquisition times for DR D-SPECT were 15 minutes, compared to 21 minutes (stress) and 16 minutes (rest) for conventional SPECT.
• Image analysis involved visual assessment using the 17-segment model and calculation of summed stress and rest scores; image quality and gut activity were also assessed.

Main Results:

• The summed stress and rest scores from DR D-SPECT and conventional SPECT showed high correlation (r=0.9790 and r=0.9694).
• DR D-SPECT demonstrated comparable diagnostic performance to conventional SPECT, with high correlation in summed scores (r=0.9968).
• Stress perfusion defects were significantly larger in six patients on DR D-SPECT images, with five imaged earlier by D-SPECT.

Conclusions:

• Simultaneous DR MPI with D-SPECT is feasible, offering high quality and comparable diagnostic performance to conventional SPECT.
• The D-SPECT system enables efficient myocardial perfusion imaging in a single session, reducing overall acquisition time.
• This technology presents a promising advancement for nuclear cardiology, enhancing both patient experience and diagnostic capabilities.