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- M J Bradley.
- Department of Clinical Radiology, Southmead Hospital, Bristol, Westbury-on-Trym, BS10 5NB, U.K.
- Clin Radiol. 2001 Jun 1;56(6):495-8.
AimsTo describe the optimum conditions for successful free-hand ultrasound guided intervention using an in-vitro experiment.Materials And MethodsOptimal free-hand biopsy conditions were determined using targets buried in a purpose-built interventional phantom. The needle/probe distance and probe/phantom surface angle were changed whilst recording the needle track lengths and needle conspicuity.ResultsOptimal free-hand conditions included a needle/probe distance of 2-3 cm in combination with a needle/probe angle 55-60 degrees. This enabled excellent needle conspicuity with short needle track length and early needle tip visualization.ConclusionUnderstanding how to optimize the free-hand conditions will help the interventionalist to obtain greater performance using a variety of puncture devices. This concept is likely to be particularly important to the novice interventionalist as well as to those teaching the free-hand technique.
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