Authors: Takefumi Yasunaga Kozo Konishi Shohei Yamaguchi Ken Okazaki Jaesung Hong Satoshi Ieiri Hideaki Nakashima Kazuo Tanoue Tsuneo Fukuyo Makoto Hashizume
Publish Date: 2007/05/12
Volume: 2, Issue: 1, Pages: 11-18
Abstract
Objects We have developed a new MRcompatible laparoscope that incorporates a distally mounted chargecoupled device CCD The MRcompatibility and feasibility of laparoscopy using the new laparoscope were evaluated during MR imageguided laparoscopic radiofrequency ablation therapy RFAMaterials and methods MR compatibility of the laparoscope was investigated in terms of MR image artifact caused by electromagnetic interference EMI and susceptibility MR images were obtained using spin echo and gradient echo pulse sequences with a 03 T open MRI unit We performed an in vivo experiment with MR imageguided laparoscopic RFA on three pigs near realtime MR images and 3D navigation were possible using intraoperative MR images Agarose gel was injected into the pigs’ livers as puncture targets the diameter of each target was approximately 20 mmResults Artifacts resulting from EMI were not found in phantom experiments MR imageguided laparoscopic RFA was successfully performed in all procedures Both the laparoscopic vision and near realtime MR images were clear No artifact was detected on the MR images and the surgeon was able to confirm the true position of the probe and target during treatment using the near realtime MR images
Keywords: