| Budget Amount *help |
¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2009: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2008: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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| Research Abstract |
At phase-based gating, the dosimetric parameters and treatment times are similar, irrespective of whether gating is around end-expiration or end-inspiration. At amplitude-based gating, a greater reduction in the lung dose is obtained when gating is around end-inspiration rather than end-expiration, however, the treatment time is prolonged considerably. When a 30% duty cycle is used, significant reduction in lung dose is achieved at the expense of modest prolongation of treatment time using phase-based gating around end-expiration.
Three dimensional tumor motion, craniocaudal tumor motion, and the craniocaudal tumor position are useful for predicting the benefit of respiratory-gated radiotherapy in lung cancer patients. Tumor volume is not a useful factor.
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