Modelling 6 MV photon beams of a stereotactic radiosurgery system for Monte Carlo treatment planning

Stereotactic Radiosurgery (SRS) has evolved as a unique discipline that combines aspects of both surgery and radiation oncology. Technological developments in the past few decades have provided a wide array of treatment techniques, including (i) the Gamma KnifeTM; (ii) Linac-based stereotactic techniques using circular collimators or using micro multileaf collimators (mMLCs); (iii) the Cyber KnifeTM, using an x-band linac mounted on a robotic arm; and (iv) serial and spiral tomotherapy. This paper provides a review of the treatment planning methods for stereotactic radiosurgery. Because of the differences in planning strategies used for each SRS technique, this paper will provide both a general review of the pre-requisites and common features of SRS treatment planning and the planning techniques specific to each of the SRS techniques.

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OC-0466 VIRTUAL SOURCE MODELLING OF PHOTON BEAMS FOR MONTE CARLO BASED RADIATION THERAPY TREATMENT PLANNING

Radiotherapy and Oncology ◽

10.1016/s0167-8140(12)70805-8 ◽

2012 ◽

Vol 103 ◽

pp. S186-S187 ◽

Cited By ~ 2

Author(s):

M. Sikora ◽

M. Alber

Keyword(s):

Monte Carlo ◽

Radiation Therapy ◽

Treatment Planning ◽

Virtual Source ◽

Photon Beams ◽

Radiation Therapy Treatment Planning ◽

Therapy Treatment

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Application of Monte-Carlo Code to dose distribution calculation in a case of lung cancer by the emitted photon beams from Linear Accelerator

Nuclear Science and Technology ◽

10.53747/jnst.v5i4.205 ◽

2015 ◽

Vol 5 (4) ◽

pp. 39-44

Author(s):

Thanh Xuan Le ◽

Cam Thu Nguyen Thi ◽

Van Nghia Tran ◽

Hong Loan Truong Thi ◽

Thanh Nhon Vo

Keyword(s):

Lung Cancer ◽

Monte Carlo ◽

General Hospital ◽

Treatment Planning ◽

Dose Distribution ◽

Linear Accelerator ◽

Treatment Plan ◽

Monte Carlo Code ◽

Photon Beams ◽

Distribution Calculation

The dose distribution calculation is one of the major steps in radiotherapy. In this paper the Monte Carlo code MCNP5 has been applied for simulation 15MV photon beams emitted from linear accelerator in a case of lung cancer of the General Hospital of Kien Giang. The settings for beam directions, field sizes and isocenter position used in MCNP5 must be the same as those in treatment plan at the hospital to ensure the results from MCNP5 are accurate. We also built a program CODIM by using MATLAB® programming software. This program was used to construct patient model from lung CT images obtained from cancer treatment cases at the General Hospital of Kien Giang and then MCNP5 code was used to simulate the delivered dose in the patient. The results from MCNP5 show that there is a difference of 5% in comparison with Prowess Panther program – a semi-empirical simulation program which is being used for treatment planning in the General Hospital of Kien Giang. The success of the work will help the planners to verify the patient dose distribution calculated from the treatment planning program being used at the hospital.

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