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ESTRO IG and Adaptive

Course Parikh 25.10.2016

MR-IGRT APBI Approach

Patient characteristics:

Women with Stage 0-1 breast cancer,

status post lumpectomy, appropriate candidates for APBI,

who were not eligible for brachytherapy. Enrolled on

institutional registry. (N = 30 patients)

Treatment:

MR-IGRT APBI, 38.5 Gy/10 fx BID

Treatment planning:

CT and MRI simulation (Supine, arms up, AC, Lucite brackets)

PTV = CTV = Cavity + 1 cm

Cavity localization on volumetric MRI prior to each fraction

Continuous cine acquisition during delivery of each fraction

Patient time in room per fraction: mean 36 minutes

Courtesy of Maria Thomas, MD, PhD

MRG-RT: Moderate Experience - Breast