Modern sonography enables the detection of small and subtle changes in the normal echo pattern. These might represent significant pathological changes which can not al methods be totally exposed by the echo pattern alone. There is, therefore, an increasing requirement for the supplement of the ultra sonically assisted percutaneous puncture, which can be per formed with fantastic accuracy and with practically no risk. Also, ultrasonically directed leak has actually shown indispensable for a variety of therapeutic functions. The first percutaneous puncture assisted by ultrasonic scanning using a specifically created transducer was per formed in 1969 at the ultrasonic lab in Gentofte, now Herlev, Hospital, Copenhagen. The concept was based on a punc ture transducer explained and utilized by Kratochwill for punc ture under the assistance of the ultrasonic A-presentation tech nique. The advancement in the field formed the basis of the First International Conference on Ultrasonically Guided Puncture at Herlev Hospital in 1978 sponsored by The Danish Society of Diagnostic Ultrasound. The understanding and experience of the speakers at that conference was assembled in the book “Ultrasonically Guided Leak Strategy” published in1980 Since then the Society has actually sponsored a conference at the very same place in 1980 and 1983, the current conference being called “Third International Conference on lnterventional Ultrasound”.
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