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  • Title: 111-indium-DTPA-IgG lung imaging in patients with pulmonary and HIV infection.
    Author: Khalkhali I, Mena I, Rauh DA, Diggles LE, Pham HL, Mason GR.
    Journal: Chest; 1995 May; 107(5):1336-41. PubMed ID: 7750328.
    Abstract:
    111-Indium-DTPA-IgG (111In-IgG) is a new radiopharmaceutical that has been evaluated for the detection of infection without the need for in vitro cell labeling. We prospectively studied this agent in 33 patients suspected of having lung infections, most of whom also had HIV infection, and three patients with HIV infection and diarrhea without lung disease. Anterior and posterior lung images in the upright position were obtained within 24 h after intravenous administration of 2 mCi of 111In-IgG and were read in a blinded fashion by two nuclear medicine physicians. Of 29 patients suspected to have Pneumocystis carinii pneumonia (PCP), the diagnosis was confirmed by bronchoalveolar lavage in 18. Diffusely increased lung uptake of 111In-IgG was found in 17 of 18 patients who had PCP and was normal in 10 of 11 patients without PCP. The intensity of 111In-IgG uptake was related to sever gas exchange abnormality. Two patients with apparent bacterial lung infections had focal accumulation of 111In-IgG while two patients with minor radiographic abnormalities had no increased uptake. Normal lung uptake also occurred in two of three HIV-positive patients who had diarrhea and no lung disease. 111In-IgG appears to be useful in the detection of PCP and other pulmonary infections.
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