Carbon-Ion Therapy Spares Surgery (IMAGE)

The National Institutes for Quantum Science and Technology

Carbon-Ion Therapy Spares Surgery

Caption

Typical dose distribution for carbon-ion radiotherapy in breast cancer and a representative case of right-sided breast cancer in a 61-year-old woman (T1cN0M0, tumor size 10 mm).

Top panel: Carbon-ion beams are delivered from three directions (yellow arrows). To maintain therapeutic efficacy while minimizing skin exposure, the 50% isodose line (green) of the prescribed dose (60 Gy [RBE]) is adjusted to avoid reaching the skin.

Bottom panel: Sagittal MRI images obtained before treatment, two years after treatment, and seven years after treatment. The lesion (circled in red) gradually regresses, completely disappears by two years, and shows no evidence of recurrence thereafter.

Credit

National Institutes for Quantum Science and Technology, Japan

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