Abstract
Cardiovascular disease continues to lead as one of the greatest contributors to mortality [1]. Cardiac sarcoidosis is a lesser known but highly lethal clinical condition that has been increasing in incidence and prevalence globally [1]. Within the radiologic modalities, both cardiac magnetic resonance imaging (MR) and positron emission tomography-computed tomography (PET-CT) have emerged as ideal imaging modalities used in evaluating and assisting with treatment considerations for cardiac sarcoidosis. MR and PET-CT are complementary in regards to imaging capabilities but certain patient population considerations lend themselves to favoring PET-CT over MR, In particular, although an increasing number of implanted cardiac defibrillators (ICDs) are MR-compatible, many patients do not have MR-compliant devices and are unable to have MR for sarcoidosis evaluation due to the dangers inherent to the MR’s magnetic field and the ferromagnetic properties of ICDs. For patient safety, cardiac PET-CT may be the only effective imaging option available.
Highlights
To date, PET has not been widely used for cardiac sarcoidosis [2]
positron emission tomography-computed tomography (PET-computed tomography (CT)) scanners are principally used for oncology and neurology making the time available for cardiac imaging less likely
In terms of a mixed PET-CT imaging regimen including cardiology, neurology and oncology, one useful strategy is to perform cardiac PET-CT in dedicated slots that account for patient dietary prep and prolonged fasting as well the need for oncology imaging
Summary
PET has not been widely used for cardiac sarcoidosis [2]. This has largely been due to the limited availability of PET-CT imaging devices, the primacy of oncology for existing PET-CT scanner use and for many imaging departments, lack of knowledge base for optimized cardiac PET-CT and patient protocols. This time interval is inclusive of the Rb-82 perfusion imaging, fatty acid optimization, F-18 FDG uptake, imaging and processing. PET-CT scanners are principally used for oncology and neurology making the time available for cardiac imaging less likely.
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