PET Myocardial Glucose Metabolism and Perfusion Imaging: Part 1 — Data Acquisition and Patient Preparation

A cardiac PET scan is only as good as the preparation behind it. This is the first of a two-part ASNC technical guideline, and it covers the unglamorous but decisive groundwork: how to ready the patient and acquire the images so that the metabolic and perfusion data mean what the cardiologist thinks they mean.

Its concern is the protocol, not the diagnosis. PET imaging of glucose metabolism — used to tell living, hibernating heart muscle from scar — depends on getting the patient’s metabolic state right, often through careful glucose loading, before the scanner ever runs. Get the preparation wrong and the picture is uninterpretable. This document standardizes those steps so that scans done in different labs can be trusted and compared.

The honest framing is that this is a procedural standards document for the imaging laboratory, not a clinical decision guide for whether a patient should be scanned in the first place. Its audience is the technologist and the imaging physician; its evidence base is expert procedural consensus rather than outcomes data.

We rate the evidence limited in the sense the website uses — not because the guidance is wrong, but because it sits one step removed from the clinical question of how PET changes a patient’s diagnosis or treatment. It is foundational plumbing for a powerful test, paired with its companion document on interpretation and reporting.