Here we report a 58-year-old manwith chronic myelogenousleukemia in the chronic phase, who developed acute respiratory failure following administration of high dose natural interferon 3 (6,300xl04 units/week). Radiological and histological findings were consistent with acute interstitial pneumonia (AIP). Although the pathogenesis remains unclear, it is important to watch for the possible development of AIP when employing interferon 3 therapy, especially at high doses. (Internal Medicine 32: 716-718, 1993)

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An area-detector CT (ADCT) has a 320-detector row and can obtain isotropic volume data without helical scanning within an area of nearly 160 mm. The actual-perfusion CT data within this area can, thus, be obtained by means of continuous dynamic scanning for the qualitative or quantitative evaluation of regional perfusion within nodules, lymph nodes, or tumors. Moreover, this system can obtain CT data with not only helical but also step-and-shoot or wide-volume scanning for body CT imaging. ADCT also has the potential to use dual-energy CT and subtraction CT to enable contrast-enhanced visualization by means of not only iodine but also xenon or krypton for functional evaluations. Therefore, systems using ADCT may be able to function as a pulmonary functional imaging tool. This review is intended to help the reader understand, with study results published during the last a few decades, the basic or clinical evidence about (1) newly applied reconstruction methods for radiation dose reduction for functional ADCT, (2) morphology-based pulmonary functional imaging, (3) pulmonary perfusion evaluation, (4) ventilation assessment, and (5) biomechanical evaluation.