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Possibilities and Limitations of Radioactive Tracers in Hepatobiliary Studies

  • G. Galli
  • M. Salvatori
  • V. Valenza
Conference paper

Abstract

The advent of other imaging modalities has modified the role of radioisotopic techniques in liver diseases. For example, the radiocolloid liver scan, once of primary interest in every nuclear medicine center, is losing ground, and it is doubtful that recent improvements in the technique, such as those based on fractals [1], can revitalize the method. Nevertheless, we believe it can still find useful application in two field. One is in the diagnosis of the nature of solid intrahepatic lesions identified by other methods (mostly incidentally during an ultrasound investigation). An uptake of the radiocolloid excludes malignancy and points to the diagnosis of a focal nodular hyperplasia [2, 3]. The colloid examination combined with 99mTc-labeled IDA scintigraphy improves the diagnosis; and IDA uptake indicates that the mass is composed of hepatocytes, and that it is benign or, if malignant, well differentiated [4]. The association of the two examinations can provide a differential diagnosis of the primary tumor according to the criteria in Table 1, with a high degree of accuracy when the focal lesion is larger than 3–4 cm (Fig. 1). The second application is in liver cirrhosis. If a typical pattern is observed, it is pathognomonic for the diagnosis. The examination can be useful in the follow-up and can demonstrate the presence of photopenic lesions suspected of representing the initial stages of a liver carcinoma.

Keywords

Biliary Atresia Focal Nodular Hyperplasia Radioactive Tracer Bile Reflux Liver Carcinoma 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1991

Authors and Affiliations

  • G. Galli
  • M. Salvatori
  • V. Valenza

There are no affiliations available

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