RuPAC2016 - List of Authors (Yakovlev, I.A.)

Paper	Title	Page
WEPSB045	The Way To Improve Conformity Of Proton Therapy	464
	I.A. Yakovlev, S.V. Akulinichev, Y.K. Gavrilov RAS/INR, Moscow, Russia R.D. Ilich VINCA, Belgrade, Serbia
	Funding: Institute for nuclear research of RAS (INR), Moscow 117312, Russia In the case of small tumors the pencil beam width may be comparable with the target size. In these cases the application of classic method of passive beam scattering with a one-stage formation of dose distribution may be reasonable. However, the last method in its standard implementation fails to provide the dose conformity: either the maximal dose exceeds the tumor volume on its proximate site or the dose deviates too much within the tumor. In order to overcome this shortcoming of the passive scattering method, we suggest a new construction of a two-component ridge filter (the corresponding patent is pending). We have performed a series of calculations with the Monte-Carlo code SRNA in order to find the optimal construction from the point of view of dose delivery accuracy and of the device manufacturability. With that ridge filter the 95% isodose does not notably leave the tumor volume. The usual 'wings' of isodoses on proximate side are now absent and the volume of irradiated healthy tissue is significantly reduced. The experimental tests with proton beams are now in progress.
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Paper

Title

Page

The Way To Improve Conformity Of Proton Therapy

464

I.A. Yakovlev, S.V. Akulinichev, Y.K. Gavrilov
RAS/INR, Moscow, Russia
R.D. Ilich
VINCA, Belgrade, Serbia

Funding: Institute for nuclear research of RAS (INR), Moscow 117312, Russia
In the case of small tumors the pencil beam width may be comparable with the target size. In these cases the application of classic method of passive beam scattering with a one-stage formation of dose distribution may be reasonable. However, the last method in its standard implementation fails to provide the dose conformity: either the maximal dose exceeds the tumor volume on its proximate site or the dose deviates too much within the tumor. In order to overcome this shortcoming of the passive scattering method, we suggest a new construction of a two-component ridge filter (the corresponding patent is pending). We have performed a series of calculations with the Monte-Carlo code SRNA in order to find the optimal construction from the point of view of dose delivery accuracy and of the device manufacturability. With that ridge filter the 95% isodose does not notably leave the tumor volume. The usual 'wings' of isodoses on proximate side are now absent and the volume of irradiated healthy tissue is significantly reduced. The experimental tests with proton beams are now in progress.

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