PET/MR in prostate cancer: technical aspects and potential diagnostic value.

PET/MR is a new multimodal imaging technique that is expected to improve diagnostic performance of imaging in conditions in which assessment of changes in soft tissue is important such as prostate cancer. Despite substantial changes in PET technology compared to PET/CT, initial studies have demonstrated that integrated PET/MR provides comparable image quality to that of PET/CT, retaining PET quantification efficacy. In this review we briefly describe technological changes compared to PET/CT that made integrated PET/MR possible, propose acquisition protocols for evaluation of prostate cancer with this new multimodal approach, present initial results concerning the application of PET/MR in prostate cancer, and outline the potential for further clinical applications, focusing on potential incremental value compared to present diagnostic performance.

PET and MRI in cardiac imaging: from validation studies to integrated applications.

Introduction: Positron emission tomography (PET) is the gold standard for non-invasive assessment of myocardial viability and allows accurate detection of coronary artery disease by assessment of myocardial perfusion. Magnetic resonance imaging (MRI) provides high resolution anatomical images that allow accurate evaluation of ventricular structure and function together with detection of myocardial infarction.

Objective: Potential hybrid PET/MR tomography may potentially facilitate the combination of information from these imaging modalities in cardiology.

Postacquisition detection of tumor motion in the lung and upper abdomen using list-mode PET data: a feasibility study.

Unlabelled: One of the main degrading factors in the quality of oncologic PET images of the thorax and upper abdomen is respiratory motion of tumors. One method to reduce this effect is the acquisition of PET data in gated mode. A second method is the correction of studies for motion.