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Technology Assessment for Radiologists¹

¹ From the Department of Research, American College of Radiology, 1891 Preston White Dr, Reston, VA 20191 (J.H.S.); Riley Hospital for Children, Indiana University Medical Center, Indianapolis (K.E.A.); and Department of Diagnostic Radiology, Yale University, New Haven, Conn (J.H.S.). Received August 10, 2003; revision requested August 19; revision received and accepted August 21. Address correspondence to J.H.S. (e-mail: jonathans@acr.org).

View larger version (20K): [in a new window]   Figure 1. Example of a typical imaging decision analysis tree. In this example, an imaging test is compared with clinical examination for the correct diagnosis of acute appendicitis.

View larger version (55K): [in a new window]   Figure 2. Additional procedures for enhancement of study quality and rapidity, with particular reference to a study of substantial scale.

View larger version (19K): [in a new window]   Figure 3. Example of length bias. Half of the cases are the more indolent form (longer preclinical phase, longer symptomatic phase, and less severe adverse events, as shown by a smaller x). At any point in time (t1 and t2 are randomly chosen points in time), however, two-thirds of the cases detectable only with screening are indolent.