A Split-and-Merge-Based Uterine Fibroid Ultrasound Image Segmentation Method in HIFU Therapy

Full coverage path planning algorithm for MRgFUS therapy

Background

High‐quality methods for Magnetic Resonance guided Focussed Ultrasound (MRgFUS) therapy planning are needed for safe and efficient clinical practices. Herein, an algorithm for full coverage path planning based on preoperative MR images is presented.

Methods

The software functionalities of an MRgFUS robotic system were enhanced by implementing the developed algorithm. The algorithm's performance in accurate path planning following a Zig‐Zag pathway was assessed on MR images. The planned sonication paths were performed on acrylic films using the robotic system carrying a 2.75 MHz single element transducer.

Results

Ablation patterns were successfully planned on MR images and produced on acrylic films by overlapping lesions with excellent match between the planned and experimental lesion shapes.

Conclusions

The advanced software was proven efficient in planning and executing full ablation of any segmented target. The reliability of the algorithm could be enhanced through the development of a fully automated segmentation procedure.

Effect of high-intensity focused ultrasound ablation on endometriosis of the abdominal wall

In this study, we aimed to explore the effect of high-intensity focused ultrasound (HIFU) ablation on endometriosis of the abdominal wall. A total of 25 patients with abdominal wall endometriosis were selected after HIFU treatment, and their demographic characteristics were retrospectively analyzed. The blood perfusion of focus before operation and the focus ablation during or after operation were evaluated using ultrasound contrast, and follow-up for 24 months. Thirty lesions were ablated in 25 patients. Intermittent pain disappeared 1 month after the operation, and patients' pain score significantly decreased, while the shrink ratio of lesions significantly increased with prolonged follow-up time. No severe complications were noted. HIFU ablation of abdominal wall endometriosis is an effective and safe method, with obvious long-term effects, and showed a significant guiding effect on the treatment of abdominal wall adenomyosis in the clinical setting.