Fig.12-5 Fig.12-6

Fig.12-5(left) The Process flow of dosimetry by JCDS Fig.12-6(right) Patient immobilization method using laser beams

Fig.12-5(left) The Process flow of dosimetry by JCDS

JCDS creates a patient s 3D model using patient's medical images. Doses are determined by calculation with Monte-Carlo transport code. Optimum conditions for irradiation are identified based on the calculation results.

Fig.12-6(right) Patient immobilization method using laser beams

Laser beams are directed at where points on the patient's face such as nasal apex, eyes, and ears should be. By aligning the actual patient s head with these beams, it is fixed accurately to the irradiation position.

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