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Abstract #0975

Cervical-Cancer Imaging for brachytherapy planning employing an endo-vaginal array that includes an enhanced forward-looking coil

Akbar Alipour1, Eric S Meyer1, Hassan Elahi1, Sarah Fink1, Henry R Halperin1, Akila N Viswanathan1, and Ehud J Schmidt1

1School of Medicine, Johns Hopkins University, Baltimore, MD, United States

Advanced cervical-cancer spreads from the cervix to the posterior-endometrium and vaginal walls. Improving imaging SNR in this region shortens scan-times required for precisely localizing live-tumor locations before high-dose-rate (HDR) interstitial radiation-therapy. Current endo-vaginal coils focus on vaginal-wall imaging and are in-effective for posterior-endometrium/cervix imaging. This study designs and builds an endo-vaginal array which contains sideways-looking vaginal-wall, and forward-looking cervix/posterior-endometrium elements. The forward-looking “spiral”-coil is metallic-backed, pushing the RF-lobe upwards, enlarging its FOV. The array was designed with electromagnetic simulation and tested in phantoms and swine. Forward-looking SNR over a 3x3x3 cm3 FOV was ~4-8 times that of the spine-array.

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