Feasibility of Respiratory Triggering for MR-Guided Microwave Ablation of Liver Tumors Under General Anesthesia
- Shiga University of Medical Science, Seta Tsukinowa-cho, Ohtsu, Molecular Neuroscience Research Center (Japan)
- Shiga University of Medical Science, Department of Surgery (Japan)
- GE-Yokogawa Medical Systems (Japan)
We obtained clear and reproducible MR fluoroscopic images and temperature maps for MR image-guided microwave ablation of liver tumors under general anesthesia without suspending the artificial ventilation. Respiratory information was directly obtained from air-way pressure without a sensor on the chest wall. The trigger signal started scanning of one whole image with a spoiled gradient echo sequence. The delay time before the start of scanning was adjusted to acquire the data corresponding to the k-space center at the maximal expiratory phase. The triggered images were apparently clearer than the nontriggered ones and the location of the liver was consistent, which made targeting of the tumor easy. MR temperature images, which were highly susceptible to the movement of the liver, during microwave ablation using a proton resonance frequency method, could be obtained without suspending the artificial ventilation. Respiratory triggering technique was found to be useful for MR fluoroscopic images and MR temperature monitoring in MR-guided microwave ablation of liver tumors under general anesthesia.
- OSTI ID:
- 21088252
- Journal Information:
- Cardiovascular and Interventional Radiology, Vol. 27, Issue 4; Other Information: DOI: 10.1007/s00270-003-0079-9; Copyright (c) 2004 Springer-Verlag; Article Copyright (c) 2004 Springer-Verlag New York, Inc; Country of input: International Atomic Energy Agency (IAEA); ISSN 0174-1551
- Country of Publication:
- United States
- Language:
- English
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