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Robust GPU-based virtual reality simulation of radio-frequency ablations for various needle geometries and locations.

Abstract：

PURPOSE:Radio-frequency ablations play an important role in the therapy of malignant liver lesions. The navigation of a needle to the lesion poses a challenge for both the trainees and intervening physicians. METHODS:This publication presents a new GPU-based, accurate method for the simulation of radio-frequency ablations for lesions at the needle tip in general and for an existing visuo-haptic 4D VR simulator. The method is implemented real time capable with Nvidia CUDA. RESULTS:It performs better than a literature method concerning the theoretical characteristic of monotonic convergence of the bioheat PDE and a in vitro gold standard with significant improvements ([Formula: see text]) in terms of Pearson correlations. It shows no failure modes or theoretically inconsistent individual simulation results after the initial phase of 10 s. On the Nvidia 1080 Ti GPU, it achieves a very high frame rendering performance of > 480 Hz. CONCLUSION:Our method provides a more robust and safer real-time ablation planning and intraoperative guidance technique, especially avoiding the overestimation of the ablated tissue death zone, which is risky for the patient in terms of tumor recurrence. Future in vitro measurements and optimization shall further improve the conservative estimate.

journal_name

Int J Comput Assist Radiol Surg

journal_title

International journal of computer assisted radiology and surgery

authors

Kath N,Handels H,Mastmeyer A

doi

10.1007/s11548-019-02033-w

subject

Has Abstract

pub_date

2019-11-01 00:00:00

pages

1825-1835

issue

11

eissn

1861-6410

issn

1861-6429

pii

10.1007/s11548-019-02033-w

journal_volume

14

pub_type

杂志文章

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