What is the potential role of FDG PET or MRI in the oncological setting? MRI provides high spatial resolution and soft tissue contrast and is complementary with PET. Therefore, FDG PET/MRI is most promising for the evaluation of patients with tumors that arise from anatomic sites that are suboptimally evaluated at CT, including the brain, …
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What are the main applications of FDG PET in the oncological setting? • Lesion characterization (as benign or malignant, and as indolent or aggressive). • Tumor staging and pretreatment planning. • Prognostication of clinical outcome (prior to therapy). • Tumor response assessment (during or after therapy). • Tumor restaging (for detection and localization of sites of recurrent disease).
How does hybrid PET combined with structural imaging such as CT or MRI improve diagnostic performance in cancer patients? Hybrid PET imaging in conjunction with CT or MRI provides coregistered molecular and structural images, leading to improved image quality, improved anatomic localization of sites of radiotracer uptake, and increased sensitivity, specificity, accuracy, and confidence levels …
What is the significance of increased FDG uptake in the endometrium or adnexa? In premenopausal women, mild FDG uptake may normally be seen in the endometrium during the early menstrual cycle or in midcycle, and in the fallopian tubes or ovaries during midcycle. However, in postmenopausal women, increased endometrial or adnexal FDG uptake is generally …
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What is the significance of increased FDG uptake in the bowel? Focal FDG uptake in the bowel is generally considered as suspicious for malignancy until proven otherwise and requires further evaluation such as with computed tomography (CT), magnetic resonance imaging (MRI), fluoroscopy, or endoscopy with tissue sampling. Diffuse FDG uptake in the bowel is often …
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What is the significance of increased FDG uptake in the thyroid gland? Focal FDG uptake in the thyroid gland is generally considered as suspicious for thyroid malignancy until proven otherwise and requires further evaluation with thyroid ultrasonography or tissue sampling. This is in contradistinction to diffuse FDG uptake in the thyroid gland, which may be …
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What is the normal pattern of FDG uptake in the body? High FDG uptake is observed in the gray matter of the brain. Also, high FDG activity is seen in the collecting systems, ureters, and bladder due to urinary excretion of FDG, which can be mitigated by patient hydration and voiding prior to image acquisition. …