Homework

  • Look up the uses and uptakes of different Tech tracers:

    • RBC

      assessment of occult gastrointestinal hemorrhage

      assessment of vascular lesions, e.g. hepatic hemangioma

      assessment of cardiac function, first pass or equilibrium

    • Tc pertechnetate

      thyroid imaging - Hashimoto and Graves (I-123 for nodules/cancer or thyrotoxicosis)

      Meckel scan

      testicular scintigraphy

      parathyroid subtraction study

      gastric emptying, intestinal and rectal functional studies

    • MAG3

      • renal imaging

    • DTPA

      • glomerular renal imaging

      • glomerular filtration rate

        • HIDA
        • MDP bone
      • bone scintigraphy
        • Tech pyrophosphate
      • cardiac amyloidosis imaging
        • MAA
      • lung perfusion imaging
        • Sulfur colloid

      splenic and hepatic imaging

      taken up by the spleen, Kupffer cells in the liver and a small proportion by bone marrow

      bone marrow and soft tissue infection scintigraphy

      lymphatic scintigraphy, e.g. sentinel node lymphoscintigraphy

    • Sestamibi

      cardiac imaging

      parathyroid imaging

  • Look up uses, half life, energies of:

    • Ga 67 citrate

      • (93, 185, 288, 394 KeV energy) spectra
      • t1/2 ~78hrs
      • crtiical organ is bone surfaces

      • localization of source of fever in cases of fever of unknown origin (FUO)

        sarcoidosis

        tuberculosis

        retroperitoneal fibrosis

        bleomycin and amiodarone induced pulmonary toxicity

        spinal osteomyelitis

        lung cancer

        ulcerative colitis

        non-specific tumor imaging agent (used in lymphomas in the past, before advent of F-18 FDG PET-CT)

        deep vein thrombosis

        interstitial nephritis

        pneumoconioses

    • Indium 111 WBC
      photon energy: 174 KeV, 247 KeV
      physical half-life: 2.8 days
      normal distribution: spleen, liver, bone (first 4 hours pulmonary activity seen)
      attempts to localize infection and/or inflammation by injecting the patient's previously extracted and radioactively-labeled WBCs

    • Different Iodines, which ones we use for what including I-124 and I-125