Approach to 3D dose verification by utilizing autoactivation
Artikel i vetenskaplig tidskrift, 2011

To evaluate the deposited dose distribution in a target, we have proposed to utilize the annihilation gamma-rays emitted from the positron emitters distributed in the target irradiated with stable heavy-ion beams. Verification of the one dimensional (1-D) dose distributions along and perpendicular to a beam axis was achieved through our previous works. The purpose of this work is to verify 3-D dose distributions. As the first attempt uniform PMMA targets were irradiated in simple rectangular parallelepiped shapes, and the annihilation gamma-rays were detected with a PET scanner. By comparing the detected annihilation gamma-ray distributions with the calculated ones the dose distributions were estimated. As a result the estimated positions of the distal edges of the dose distributions were in agreement with the measured ones within 1 mm. However, the estimated positions of the proximal edges were different from the measured ones by 5-9 mm depending on the thickness of the irradiation filed.

PET

Carbon therapy

3-D

Verification

fragmentation reactions

Dose

Författare

Y. Nakajima

Tokyo Institute of Technology

T. Kohno

Tokyo Institute of Technology

T. Inaniwa

National Institute of Radiological Sciences

S. Sato

National Institute of Radiological Sciences

E. Yoshida

National Institute of Radiological Sciences

T. Yamaya

National Institute of Radiological Sciences

Y. Tsuruta

Tokyo Institute of Technology

Lembit Sihver

Chalmers, Teknisk fysik, Nukleär teknik

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

0168-9002 (ISSN)

Vol. 648 (Supplement 1) S119-S121

Ämneskategorier

Subatomär fysik

DOI

10.1016/j.nima.2010.12.078