Abstract
Noninvasive liver imaging with radiocolloid agents has been available for almost two decades. There have been many changes in the radiopharmaceutical agents and in the instrumentation used in the procedure. The indications for ordering the procedure have been refined and the criterion for abnormality has become more structured. 8, 9, 11, 23 With the addition of the noninvasive diagnostic techniques of ultrasonography and computed tomography, there is need and requirement for the comparison of these different modalities. However, continuing technologic advances in ultrasound techniques and computed tomography, as well as advances in nuclear medicine, have made such comparisons very difficult. These techniques may well prove to be complementary rather than supplementary to one another. The following is a review of observer performance in radiocolloid liver scintigraphy and a comparison with results from ultrasound studies and computed tomography.
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