Angiographic C-Arm CT-Versus MDCT-Guided Stereotactic Punctures of Liver Lesions: Nonrigid Phantom Study

作者：Widmann Gerlig^*; Wallach Daphne; Toporek Grzegorz; Schullian Peter; Weber Stefan; Bale Reto

来源：American Journal of Roentgenology, 2013, 201(5): 1136-1140.

DOI：10.2214/AJR.12.10405

• ablation
• accuracy
• C-arm CT
• image fusion
• stereotaxy

OBJECTIVE. Angiographic C-arm CT may allow performing percutaneous stereotactic tumor ablations in the interventional radiology suite. Our purpose was to evaluate the accuracy of using C-arm CT for single and multimodality image fusions and to compare the targeting accuracy of liver lesions with the reference standard of MDCT. %26lt;br%26gt;MATERIALS AND METHODS. C-arm CT and MDCT scans were obtained of a non-rigid rapid prototyping liver phantom containing five 1-mm targets that were placed under skin-simulating deformable plastic foam. Target registration errors of image fusion were evaluated for single-modality and multimodality image fusions. A navigation system and stereotactic aiming device were used to evaluate target positioning errors on postinterventional scans with the needles in place fused with the C-arm CT or MDCT planning images. %26lt;br%26gt;RESULTS. Target registration error of the image fusion showed no significant difference (p %26gt; 0.05) between both modalities. In five series with a total of 25 punctures for each modality, the lateral target positioning error (i.e., the lateral distance between the needle tip and the planned trajectory) was similar for C-arm CT (mean [+/- SD], 1.6 +/- 0.6 mm) and MDCT (1.82 +/- .97 mm) (p = 0.33). %26lt;br%26gt;CONCLUSION. In a nonrigid liver phantom, angiographic C-arm CT may provide similar image fusion accuracy for comparison of intra- and postprocedure control images with the planning images and enables stereotactic targeting accuracy similar to that of MDCT.

• 出版日期2013-11