Pdds

• Gallium-67 Citrate (67 Ga) can be useful in demonstrating the presence and extent of malignancies associated with Hodgkin's disease, lymphomas, and bronchogenic carcinoma.
• Gallium-67 Citrate (67 Ga) can also be useful for the localization of focal inflammatory lesions (e.g., sarcoidosis, abscesses, pyelonephritis).
• Two scintillation detectors are placed on either side of the tissue, connected to a coincident circuit, resulting in a low-background detector with excellent resolution.
• Carbon-11 has a half-life of 20 minutes and has found utility in the study of myocardial metabolism.
• Tositumomab with 131I (Bexxar) is also known as Metastron.
• 131I is indicated for the evaluation of size, thyroid nodules, carcinoma, and masses in the lingual region, neck, and mediastinum and in the localization of functioning metastatic thyroid tumors.
• Tositumomab with 131I (Bexxar) is a MAB product that has a radioactive substance, 131I attached to it.
• 18F has a relatively long half-life among positron emitters, 110 minutes, and is applied in the imaging of cerebral, myocardial, and tumor metabolism.
• 13N ammonia has been used as a tracer for cerebral and myocardial blood flow and demonstrates a half-life of 10 minutes.
• The decay of 131I results in the emission of two photons with specific energy (511 KeV) and 180° emission.
• 15O is the radionuclide of oxygen with the longest half-life, 2.04 minutes, and has been used in hemodynamic studies, cerebral oxygen extraction, and metabolism.
• 68Ga citrate is very useful in studies of regional plasma volume and 68Ga-transferrin PET study allows calculation of the regional hematocrit.
• Gallium-67 Citrate (67 Ga) is most important in the diagnosis and monitoring of Pneumocystis carinii pneumonia of AIDS.
• Gallium-67 Citrate (67 Ga) can be used as a diagnostic screen in cases of prolonged fever.
• Indium-111 Chloride (111 In) has a half-life of 10 to 14 days and is used diagnostically to evaluate thyroid function and morphology.
• Indium-111 Chloride (111 In) has an effective half-life of 13 hours and its principal therapeutic application is in RIT of solid large tumors and lymphomas.
• Sodium Iodide-123 (123 I) is used diagnostically to evaluate thyroid function and morphology and has an effective half-life of 13 hours.
• Sodium Iodide-123 (123 I) is used in RIT of solid large tumors and lymphomas.
• Sodium Iodide-131 (131 I) is used in small amounts for thyroid function studies or thyroid uptake tests and has an effective half-life of 13 hours.
• Sodium Iodide-131 (131 I) is used in the diagnosis of hyperthyroidism and in calculating the activity to be administered for radioactive iodine therapy.