Lesion movement during positron emission tomography (PET) scan acquisition due to normal respiration is a common source of artefact. A PET scan is acquired in multiple couch positions of between 2 and 5 min duration with the patient breathing freely. A PET-avid lesion will become blurred if affected by respiratory motion, an effect similar to that created when a person moves in a photograph. Th...

DESCRIPTION A 54-year-old patient underwent right radical nephrectomy for what was then diagnosed as a Stage-II (T2bN0M0) renal cell carcinoma (RCC). Four months after surgery, the patient reported of pelvic pain and had a rising serum alkaline-phosphatase level. The tecnetium-99 mmethylene-diphosphate (Tc99m-MDP) bone scan then demonstrated a focus of uptake in the right ischium, corresponding...

UNLABELLED (18)F-FDG PET/CT is used for detecting cancer and monitoring cancer response to therapy. However, because of the variable rates of glucose metabolism, not all cancers are identified reliably. Sodium (18)F was previously used for bone imaging and can be used as a PET/CT skeletal tracer. The combined administration of (18)F and (18)F-FDG in a single PET/CT study for cancer detection ha...

OBJECTIVES In clinical practice, approximately 10-25% of post-surgical differentiated thyroid carcinoma (DTC) patients with high serum thyroglobulin (Tg) and negative 131I whole-body scan (WBS) have poor prognosis due to recurrent or metastatic lesions after radioactive iodine treatment. The purpose of this study was to evaluate the value of 18F-FDG PET/CT scan in DTC patients with high serum T...

INTRODUCTION In spite of three decades of neuroimaging, we are unable to find consistent and coherent anatomical or pathophysiological basis for autism as changes are subtle and there are no studies from India. AIM To study the regional cerebral glucose metabolism in children with autism using positron emission tomography (PET) scan and to study the behavior and cognitive functioning among th...

prognosis after surgical resection can be expected in comparison with patients with preoperative confirmed N2 disease [8]. An additional advantage of the PET scan in comparison with mediastinoscopy is that the PET scan can indicate suspected lymph nodes in stations not amenable to mediastinoscopy (eg, paraesophageal or supraclavicular). Staging of the mediastinum using positron emission tomogra...

AIM The aim of this study was to evaluate the role of whole body PET/CT scan with (18)F-fluorodeoxyglucose (FDG) in the detection of the primary tumor in patients with metastatic cancer from unknown primary origin (CUP syndrome). METHODS Sixty-eight consecutive patients, with CUP syndrome (39 lymph nodes, 29 visceral biopsy proven tumor metastases), underwent a whole-body FDG-PET/CT study. Al...

Medical Imaging Research Center, Department of Nuclear Medicine, KU Leuven, Belgium With the improving resolution of modern PET scanners, any slight motion during the scan can cause significant blurring and loss of resolution. MRI scanners have the capacity to perform quick successive scans and thus provide a means to track motion during a scan. Hence, with the advent of simultaneous PET-MR sca...

FDG-PET is a sensitive but not specific test for myocardial sarcoidosis and its ability to define prognosis remains unclear. Combination with perfusion scanning may improve accuracy by differentiating scar from inflammation. We conducted this retrospective chart review to ascertain the utility of a rubidium -FDG PET scan for assessment of disease activity in patients with cardiac sarcoidosis. T...