One of the areas of greatest innovation these days in Radiology is in the coupling of PET scanning and CT scanning into a hybrid system that allows both studies to be done together in what is now known as a PET/CT scanner. These systems in addition to minimizing study times provide the post processing tools to allow for interactive analysis of both datasets as either distinct studies or as an accurate merged dataset. The use of PET/CT is growing across a wide range of indications including lung cancer, colon cancer, melanoma, lymphoma and ovarian cancer.
The key advantage of PET scanning over CT is that while CT is an anatomic based examination PET is a physiologic based study. That is, FDG-PET looks for changes in glucose metabolism and so is very sensitive for small tumor implants as well as tumor in normal sized structures (i.e. small lymph nodes). As with all imaging studies PET has its limitations and pitfalls. However, when combined with CT many of these limitations are overcome and many of the pitfalls avoided.
In this feature we present a current state of the art review of PET/CT scanning as viewed from the perspective of a dedicated CT imager. Through a series of case studies, teaching files, detailed review of the published literature as well as summary articles and select lectures we present what we hope you will find to be a valuable learning expereience. We hope you enjoy the show.