Tumor ablation therapy of liver cancers with an open magnetic resonance imaging-based navigation system

Takashi Maeda, Jaesung Hong, Kozo Konishi, Takanori Nakatsuji, Takefumi Yasunaga, Yo Ichi Yamashita, Akinobu Taketomi, Kazuhiro Kotoh, Munechika Enjoji, Hideaki Nakashima, Kazuo Tanoue, Yoshihiko Maehara, Makoto Hashizume

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


Background: As minimally invasive treatments for liver cancers, percutaneous ablation therapies represent a valid alternative to liver resections, especially in patients with poor liver function. Recently, image-guided surgical and interventional procedures using open magnetic resonance imaging (MRI) have been introduced. Methods: We performed percutaneous ablation therapy for 51 nodules of liver cancer in 34 patients using a navigation system based on open MRI. During the ablation therapy, the ultrasonography (US) probe, needle, and tumor were displayed on the MR image. Immediately after the procedure, the therapeutic effect was evaluated by open MRI. Results: In all cases, percutaneous puncture into the tumors was successful, even in the case of tumor undetectable by US. Mean fiducial registration error was approximately 3 mm. MR images captured after the procedure clearly demonstrated the ablated area. No mortality or major complications occurred, except for mild hemorrhage, pyrexia, and ascites. Conclusions: We developed a novel navigation system integrating US and MR images using open MRI for percutaneous ablation therapy of liver cancers. The presented system allows a safe and accurate approach to liver cancers, especially certain tumors that cannot be adequately visualized by US, and an evaluation of therapeutic results immediately after the procedures.

Original languageEnglish
Pages (from-to)1048-1053
Number of pages6
JournalSurgical endoscopy
Issue number5
Publication statusPublished - May 2009

All Science Journal Classification (ASJC) codes

  • Surgery


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