Comparison Between CT and MR Images as More Favorable Reference Data Sets for Fusion Imaging-Guided Radiofrequency Ablation or Biopsy of Hepatic Lesions: A Prospective Study with Focus on Patient's Respiration

作者：Cha Dong Ik; Lee Min Woo^*; Kang Tae Wook; Oh Young Taek; Jeong Ja Yeon; Chang Jung Woo; Ryu Jiwon; Lee Kyong Joon; Kim Jaeil; Bang Won Chul; Shin Dong Kuk; Choi Sung Jin; Koh Dalkwon; Kim Kyunga

来源：CardioVascular and Interventional Radiology, 2017, 40(10): 1567-1575.

DOI：10.1007/s00270-017-1666-5

• Fusion imaging
• Ultrasonography
• Computed tomography
• Magnetic resonance imaging
• Automatic registration

To identify the more accurate reference data sets for fusion imaging-guided radiofrequency ablation or biopsy of hepatic lesions between computed tomography (CT) and magnetic resonance (MR) images.
This study was approved by the institutional review board, and written informed consent was received from all patients. Twelve consecutive patients who were referred to assess the feasibility of radiofrequency ablation or biopsy were enrolled. Automatic registration using CT and MR images was performed in each patient. Registration errors during optimal and opposite respiratory phases, time required for image fusion and number of point locks used were compared using the Wilcoxon signed-rank test.
The registration errors during optimal respiratory phase were not significantly different between image fusion using CT and MR images as reference data sets (p = 0.969). During opposite respiratory phase, the registration error was smaller with MR images than CT (p = 0.028). The time and the number of points locks needed for complete image fusion were not significantly different between CT and MR images (p = 0.328 and p = 0.317, respectively).
MR images would be more suitable as the reference data set for fusion imaging-guided procedures of focal hepatic lesions than CT images.

• 出版日期2017-10