Angiographic C-arm CT- versus MDCT-guided stereotactic punctures of liver lesions: nonrigid phantom study

Widmann, Gerlig; Wallach, Daphné; Toporek, Grzegorz; Schullian, Peter; Weber, Stefan; Bale, Reto (2013). Angiographic C-arm CT- versus MDCT-guided stereotactic punctures of liver lesions: nonrigid phantom study. American Journal of Roentgenology, 201(5), pp. 1136-1140. American Roentgen Ray Society 10.2214/AJR.12.10405

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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. MATERIALS AND METHODS C-arm CT and MDCT scans were obtained of a nonrigid 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. RESULTS Target registration error of the image fusion showed no significant difference (p > 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). 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.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research > ARTORG Center - Image Guided Therapy

UniBE Contributor:

Wallach, Daphné Alice; Toporek, Grzegorz Andrzej and Weber, Stefan

Subjects:

600 Technology > 610 Medicine & health

ISSN:

1546-3141

Publisher:

American Roentgen Ray Society

Language:

English

Submitter:

Kate Gerber

Date Deposited:

15 Apr 2014 11:53

Last Modified:

15 Apr 2014 11:53

Publisher DOI:

10.2214/AJR.12.10405

PubMed ID:

24147488

Uncontrolled Keywords:

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

URI:

https://boris.unibe.ch/id/eprint/46401

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