G. R. Wittich, E. vanSonnenberg, M. P. Andre, R. F. Mattrey

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The purpose of this study was to define the relevance of various factors influencing sonographic needle visibility. The results reflect observations from in vitro studies and experience gained from 350 ultrasound guided percutaneous biopsies. Several recommendations can be made on the basis of this study: Since the major cause of non-visibility of the needle during ultrasound guided punctures appears to be needle deviation, the shortest possible approach to the target should be chosen. To reduce needle deviation the use of a short outer guiding cannula inserted into the subcutaneous tissue may be considered. If continuous monitoring of needle insertion is not successful, the needle tip can be localized by moving the entire needle, the stylet or inserting a small guide wire. Ultrasound is recommended as a guiding modality for sonographically visible large lesions as well as for small targets that are relative close to the skin (such as dilated bile ducts or a dilated pancreatic duct). The use of CT is recommended for all lesions that are not precisely delineated by ultrasound as well as for small targets that are relatively distant from the skin (such as small adrenal lesions).

Original languageEnglish (US)
Title of host publicationProceedings of the Annual Meeting of the American Institute of Ultrasound in Medicine
PublisherAmerican Inst of Ultrasound in Medicine (Suppl to Journal of Ultrasound in Medicine v 3 n 9 Sep 1984)
Number of pages1
StatePublished - Dec 1 1984

ASJC Scopus subject areas

  • General Engineering


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