Newly developed application system for CT-guided puncture based on multidetector row CT without CT fluoroscopy.
OBJECTIVE
The aim of this article is to describe a preliminary clinical experience with a new multidetector CT (MDCT) system (GuideShot system) for CT-guided intervention.


METHODS
This system enabled simultaneous acquisition and quick display of three axial CT images. Only a single-shot mode was used, with no continuous CT fluoroscopic (CTF) mode. The exposure and the table movement could be controlled by the interventional radiologist using foot pedal switches that are on the floor beside the table. We used this system for biopsy (n = 48), drainage tube placement (n = 7), and hook wire placement prior to video-assisted thoracic surgery (n = 69).


RESULTS
Technical success was achieved in all 124 cases. In 123 of 124 cases, each intervention was done within a single breath-hold (99%). The table controller was used in 22 cases (17.7%), and the central portion of the target or the needle tip was easily shifted into the CT collimation after a single table movement.


CONCLUSIONS
This new system improved Z-axis orientation for the interventional radiologist and enabled rapid interventional procedures without the CTF system. MDCT with this system could be one of the options when single-slice CT with CTF is replaced by MDCT.
Irie
Toshiyuki
T
Department of Radiology, Hitachi General Hospital, Hitachi, Japan. toshiyuki.irie@ibabyo.Hitachi.co.jp
Kuramochi
Masashi
M
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001707:Biopsy, Needle / Q000379:methods; D004322:Drainage / Q000379:methods; D005260:Female; D006801:Humans; D008171:Lung Diseases / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D008297:Male; D008875:Middle Aged; D011677:Punctures / Q000379:methods*; D015641:Radiography, Interventional / Q000295:instrumentation / Q000379:methods*; D020775:Thoracic Surgery, Video-Assisted / Q000379:methods; D014057:Tomography, X-Ray Computed / Q000295:instrumentation / Q000379:methods*