Methodology for quantifying absolute myocardial perfusion with PET and SPECT.

Area of Science:

• Cardiovascular Imaging
• Nuclear Medicine
• Radiopharmaceutical Science

Background:

• Noninvasive quantitative myocardial perfusion measurement is crucial for cardiac research and clinical applications.
• Positron emission tomography (PET) offers established absolute perfusion quantification but requires an on-site cyclotron.
• Single-photon emission CT (SPECT) provides a more accessible alternative for myocardial perfusion quantification.

Purpose of the Study:

• To review the fundamental principles of absolute myocardial perfusion quantification.
• To discuss available radiopharmaceuticals for both PET and SPECT imaging.
• To examine advancements in instrumentation enhancing the practicality of absolute perfusion quantification in PET and SPECT.

Main Methods:

• Review of established principles in quantitative myocardial perfusion imaging.
• Analysis of radiopharmaceutical properties for PET and SPECT.
• Examination of recent instrumentation developments impacting perfusion quantification.

Main Results:

• Established methodologies exist for absolute myocardial perfusion quantification using PET.
• SPECT offers a viable, widely available alternative for quantitative perfusion assessment.
• Instrumentation advancements are improving the feasibility of absolute quantification in both modalities.

Conclusions:

• Absolute myocardial perfusion quantification is achievable noninvasively with PET and SPECT.
• Radiopharmaceutical selection and instrumentation play key roles in quantitative accuracy and clinical utility.
• Ongoing developments promise wider application of quantitative perfusion imaging in cardiology.