To the Editor: In CPC Case 8–1975 Dr. Richard C. Pfister describes isotopic imaging as, “a safe, simple, noninvasive procedure.” Although I cannot argue with the reputed safety or simplicity of the test, the characterization of noninvasive seems open to some dispute. Clearly, there is a fundamental difference between a wholly external procedure, such as echocardiography or electroencephalography, and one requiring the injection of radioactive materials into a vein. This distinction can assume more than semantic importance. Viewing the test as safe, simple and noninvasive tends to obscure the patient's perceptions of that experience. The radiologist's apparent denial of the. . . No extract is available for articles shorter than 400 words.
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