UBC Undergraduate Research

Brachytherapy Strand Localization Using Average-Reflected-Power Ultrasound Data and Echogenic Echo Strands Zheng, Jack


This project aims to determine if average-reflected-power ultrasound imaging and echogenic Echo Strands improve real-time brachytherapy strand localization on the ultrasound. The rst part of the experiment compares both regular and Echo strand image intensities at various orientations and the ability to attribute these strands to di erent image planes. The second part directly com- pares the abilities of average-re ected-image imaging and regular B-Mode imaging in contrasting both strand types against a noisy background. The Echo strand is visually and quantitatively found to give a stronger intensity response and better contrast to background noise ratio than regular strands, particularly at non-parallel strand orientations. Both strands can be attributed to associated image plane with a small degree of error though this was more di cult for regular strands at non-parallel orientations. The average- re ected-power imaging technique greatly enhances the contrast to background of both strands across all orientations compared with regular B-Mode imaging. Overall, the combination of Echo strand and average-re ected-power imaging is found to improve the strand localization abilities of the ultrasound. A clinical study can be conducted to further build on the conclusions arrived in this project. Jack Zheng - jackz@interchange.ubc.ca

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