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Patient A's neutron radiation therapy (NRT) 2 × 3 Gy plan showing radiation dose clouds (range: 1 to 6.9 neutron-Gy) demonstrating the out-of-field index lesions (blue) that were at the NRT field edge (A: index No. 1 1.0 neutron-Gy; B: index No. 2 1.98 neutron-Gy).
