A Correction Method of Dose to Attenuation Rate of Transmitting Photon Beam Through Couch Top for Radiosurgery Using Novalis.
- Author:
Sung Joon KIM
1
;
Hyun Soo SHIN
;
Seung Young KO
;
Hyeli PARK
;
Ja Young KIM
;
Bo Mi LEE
;
Ji Woon YEA
;
Sung Kyu KIM
Author Information
1. Department of Physics, College of Science, Yeungnam University, Gyongsan, Korea.
- Publication Type:Original Article
- Keywords:
Novalis;
Couch top;
Radiosurgery;
Transmission rate;
Attenuation rate
- MeSH:
Humans;
Radiosurgery;
Spine
- From:Korean Journal of Medical Physics
2011;22(1):12-17
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
This study has its own goal to deliver the accurate dose on the target volume by calculating and modifying the attenuation rate of photon beam transmitting the couch top with geometric model. The experiment was that the transmission rate and attenuation rate of photon beam transmitting the couch top was predicted by the geometric model, then compared and analyzed with what was measured experimentally based on that. The result showed that the predicted value by the geometric model accorded closely with the experimental value. In addition, in order to judge whether the practical clinical application is available, the point dose, measured after modifying the attenuation rate modelinged according to the treatment plan of a patient of spine radiosurgery, was compared with the one done nothing. The result was that the former showed decreased error range with treatment planned one than the latter. This papers calculated the transmission and attenuation rate with the geometric model transmitting the couch top and verified it experimentally. This method is expected to be very useful in not only the radiosurgery using Novalis but also the general radiation therapy.
