TY - JOUR
T1 - The Effect of Lung Tumors Target Movement on Neutron Dose
AU - Nistiyanti, I.
AU - Putranto, A. M.Y.
AU - Nugroho, F.
AU - Nainggolan, A.
AU - Fadli, M.
AU - Liura, S.
AU - Tursinah, R.
AU - Pawiro, S. A.
N1 - Funding Information:
This work was fully funded by DPRM Universitas Indonesia with Hibbah PITTA 2018, Grant no: 2317/UN2.R3.1/HKP 05.00/2018, supported Batan Tenaga Nuklir Nasional (BATAN), Jakarta, Indonesia and RS Khusus Kanker MRCCC Siloam Semanggi, Jakarta, Indonesia.
Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2020/6/15
Y1 - 2020/6/15
N2 - In radiation therapy, high energy photon above 10 MV could produce neutron. Small dose of neutron can provide biological effect in patient's body in a long term with high risk. The study aims to recognize the distribution of neutron dose for the moving and non-moving target of tumor. Neutron dose was measured by using TLD 600(LiF: Mg,Ti) and TLD 100 (LiF: Mg.Ti) in tumor target and spinal cord as organs at risk (OAR). The study used In-House Dynamic Thorax phantom movable in translation and rotation within the amplitude of 5, 10, and 15 mm. Phantom was irradiated by the techniques of 3DCRT, IMRT, and VMAT using 15 MV. The result by calculation using thermal calibration factor shows that the average of distribution the neutron dose of tumor target was increase caused by the amplitude movements. On the technique 3DCRT, the dose of neutron increased by 9%, 34%, 68% respectively on the amplitude movements of 5, 10, and 15 mm, respectively, whereas increased by 2%, 25%, 70% respectively on the amplitude movements for IMRT techniques. Moreover, on the VMAT technique, it also increased by 3%, 8%, 54% respectively on the amplitude movements. The result of study shows that the distribution of neutron dose of tumor target and spinal cord increased with the amplitude increment and VMAT technique provided the highest dose of neutron compared to other techniques of irradiation.
AB - In radiation therapy, high energy photon above 10 MV could produce neutron. Small dose of neutron can provide biological effect in patient's body in a long term with high risk. The study aims to recognize the distribution of neutron dose for the moving and non-moving target of tumor. Neutron dose was measured by using TLD 600(LiF: Mg,Ti) and TLD 100 (LiF: Mg.Ti) in tumor target and spinal cord as organs at risk (OAR). The study used In-House Dynamic Thorax phantom movable in translation and rotation within the amplitude of 5, 10, and 15 mm. Phantom was irradiated by the techniques of 3DCRT, IMRT, and VMAT using 15 MV. The result by calculation using thermal calibration factor shows that the average of distribution the neutron dose of tumor target was increase caused by the amplitude movements. On the technique 3DCRT, the dose of neutron increased by 9%, 34%, 68% respectively on the amplitude movements of 5, 10, and 15 mm, respectively, whereas increased by 2%, 25%, 70% respectively on the amplitude movements for IMRT techniques. Moreover, on the VMAT technique, it also increased by 3%, 8%, 54% respectively on the amplitude movements. The result of study shows that the distribution of neutron dose of tumor target and spinal cord increased with the amplitude increment and VMAT technique provided the highest dose of neutron compared to other techniques of irradiation.
UR - http://www.scopus.com/inward/record.url?scp=85086805874&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/1505/1/012006
DO - 10.1088/1742-6596/1505/1/012006
M3 - Conference article
AN - SCOPUS:85086805874
SN - 1742-6588
VL - 1505
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012006
T2 - 3rd Annual Scientific Meeting on Medical Physics and Biophysics, PIT-FMB in conjunction with the 17th South-East Asia Congress of Medical Physics, SEACOMP 2019
Y2 - 8 August 2019 through 10 August 2019
ER -