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Erschienen in: International Journal of Computer Assisted Radiology and Surgery 12/2023

28.05.2023 | Original Article

Development and validation of a radiofrequency ablation treatment planning system for vertebral metastases

verfasst von: Cari M. Whyne, Grace Underwood, Sean R. H. Davidson, Normand Robert, Christine Huang, Margarete K. Akens, Gabor Fichtinger, Albert J. M. Yee, Michael Hardisty

Erschienen in: International Journal of Computer Assisted Radiology and Surgery | Ausgabe 12/2023

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Abstract

Purpose

Bone-targeted radiofrequency ablation (RFA) is widely used in the treatment of vertebral metastases. While radiation therapy utilizes established treatment planning systems (TPS) based on multimodal imaging to optimize treatment volumes, current RFA of vertebral metastases has been limited to qualitative image-based assessment of tumour location to direct probe selection and access. This study aimed to design, develop and evaluate a computational patient-specific RFA TPS for vertebral metastases.

Methods

A TPS was developed on the open-source 3D slicer platform, including procedural setup, dose calculation (based on finite element modelling), and analysis/visualization modules. Usability testing was carried out by 7 clinicians involved in the treatment of vertebral metastases on retrospective clinical imaging data using a simplified dose calculation engine. In vivo evaluation was performed in a preclinical porcine model (n = 6 vertebrae).

Results

Dose analysis was successfully performed, with generation and display of thermal dose volumes, thermal damage, dose volume histograms and isodose contours. Usability testing showed an overall positive response to the TPS as beneficial to safe and effective RFA. The in vivo porcine study showed good agreement between the manually segmented thermally damaged volumes vs. the damage volumes identified from the TPS (Dice Similarity Coefficient = 0.71 ± 0.03, Hausdorff distance = 1.2 ± 0.1 mm).

Conclusion

A TPS specifically dedicated to RFA in the bony spine could help account for tissue heterogeneities in both thermal and electrical properties. A TPS would enable visualization of damage volumes in 2D and 3D, assisting clinicians in decisions about potential safety and effectiveness prior to performing RFA in the metastatic spine.

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Metadaten
Titel
Development and validation of a radiofrequency ablation treatment planning system for vertebral metastases
verfasst von
Cari M. Whyne
Grace Underwood
Sean R. H. Davidson
Normand Robert
Christine Huang
Margarete K. Akens
Gabor Fichtinger
Albert J. M. Yee
Michael Hardisty
Publikationsdatum
28.05.2023
Verlag
Springer International Publishing
Erschienen in
International Journal of Computer Assisted Radiology and Surgery / Ausgabe 12/2023
Print ISSN: 1861-6410
Elektronische ISSN: 1861-6429
DOI
https://doi.org/10.1007/s11548-023-02952-9

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