PET CT Indications | PET Scan Indications Guidelines

PET/CT: An integrated or multimodality PET/CT (positron emission tomography - computed tomography) system is a physical combination of PET and CT which allows sequential acquisition of PET and CT scanswith the patient in the same position for both examinations. Both datasets are intrinsically coregistered. In PET CT studies, attenuation correction and scatter correction are performed using the CT data

Indications for FDG PET-CT

• Differentiation of benign from malignant lesions
• Searching for an unknown primary tumour when metastatic disease is discovered as the first manifestation of cancer or when the patient presents with a paraneoplastic syndrome.
• Staging patients with known malignancies.
• Monitoring the effect of therapy on known malignancies.
• Determining whether residual abnormalities detected on physical examination or on other imaging studies follow-ing treatment represent tumour or posttreatment fibrosis or necrosis.
• Detecting tumour recurrence, especially in the presence of elevated tumour markers.
• Selection of the region of tumour most likely to yield diagnostic information for biopsy.
• Guiding radiation therapy planning.