PMID- 20177567
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20110714
LR  - 20240322
IS  - 1998-3913 (Electronic)
IS  - 0971-6203 (Print)
IS  - 0971-6203 (Linking)
VI  - 35
IP  - 1
DP  - 2010 Jan
TI  - Monte Carlo simulation of a multi-leaf collimator design for telecobalt machine 
      using BEAMnrc code.
PG  - 23-32
LID - 10.4103/0971-6203.58780 [doi]
AB  - This investigation aims to design a practical multi-leaf collimator (MLC) system 
      for the cobalt teletherapy machine and check its radiation properties using the 
      Monte Carlo (MC) method. The cobalt machine was modeled using the BEAMnrc 
      Omega-Beam MC system, which could be freely downloaded from the website of the 
      National Research Council (NRC), Canada. Comparison with standard depth dose data 
      tables and the theoretically modeled beam showed good agreement within 2%. An MLC 
      design with low melting point alloy (LMPA) was tested for leakage properties of 
      leaves. The LMPA leaves with a width of 7 mm and height of 6 cm, with tongue and 
      groove of size 2 mm wide by 4 cm height, produced only 4% extra leakage compared 
      to 10 cm height tungsten leaves. With finite (60)Co source size, the interleaf 
      leakage was insignificant. This analysis helped to design a prototype MLC as an 
      accessory mount on a cobalt machine. The complete details of the simulation 
      process and analysis of results are discussed.
FAU - Ayyangar, Komanduri M
AU  - Ayyangar KM
AD  - International Cancer Center, Mahatma Gandhi Memorial Medical Trust Hospital, 
      Bhimavaram, AP-534 204, India.
FAU - Kumar, M Dinesh
AU  - Kumar MD
FAU - Narayan, Pradush
AU  - Narayan P
FAU - Jesuraj, Fenedit
AU  - Jesuraj F
FAU - Raju, M R
AU  - Raju MR
LA  - eng
PT  - Journal Article
PL  - India
TA  - J Med Phys
JT  - Journal of medical physics
JID - 9441104
PMC - PMC2825000
OTO - NOTNLM
OT  - BEAMnrc
OT  - Cobalt-60
OT  - Monte Carlo
OT  - multi-leaf collimator
COIS- Conflict of Interest: None declared.
EDAT- 2010/02/24 06:00
MHDA- 2010/02/24 06:01
PMCR- 2010/01/01
CRDT- 2010/02/24 06:00
PHST- 2009/05/26 00:00 [received]
PHST- 2009/07/14 00:00 [revised]
PHST- 2009/08/28 00:00 [accepted]
PHST- 2010/02/24 06:00 [entrez]
PHST- 2010/02/24 06:00 [pubmed]
PHST- 2010/02/24 06:01 [medline]
PHST- 2010/01/01 00:00 [pmc-release]
AID - JMP-35-23 [pii]
AID - 10.4103/0971-6203.58780 [doi]
PST - ppublish
SO  - J Med Phys. 2010 Jan;35(1):23-32. doi: 10.4103/0971-6203.58780.