1Department of Urology, Kanto Central Hospital, 2Department of Diagnostic Imaging, Kanto Central Hospital, 3Department of Urology, Tokyo Medical & Dental University, 4Toshiba Corporation M.E.C.
intracorporal electronic linear scanning, ultrasonically guided puncture, selected needle biopsy of the prostate, cystic disease of the prostate, cystic disease of the seminal vesicle
The images obtained by intracorporal electronic linear scanning method are longitudinal tomograms in
real time, so that they are suitable for ultrasonically guided puncture of the deep pelvic organs as a prostate or seminal vesicles.
The guiding way by this scanning method is following two: transperineal puncture method and transrectal one. The transperineal puncture method is suitable for guiding a thick needle as a tru-cut biopsy needle. On the other hand, the transrectal puncture method is devised for guiding a thin needle as a aspiration needle.
At first we experimented with a transrectal lateral guiding attachment devised by Otto, secondary with a transrectal front-median guiding attachment devised by Oka. By this second method, puncture needle was always guided on the ultrasonic beam, so that we could easily watch the needle tip during procedure. Finally, we newly developed the intracorporal electronic linear scanning probe with a front-median guiding hole.
Our trial by this probe was very successful in selected aspiration biopsy of the prostate or puncturing of the cystic disease of the prostate, seminal vesicles etc.
The application of the transrectal ultrasonically guided puncture by newly developed probe was confirmed very hopeful for the diagnosis in this region.