Dose evaluation of selective collimation effect in cephalography by measurement and Monte Carlo simulation

Boram Lee, Gwisoon Shin, Sunjung Kang, Boram Shin, Ilhong Back, Hyok Park, Changseo Park, Jeongwoo Lee, Wonho Lee, Jonghak Choi, Ryeonghwang Park, Youhyun Kim

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Recently, simulations based on the Monte Carlo code have been increasingly applied for physics phenomena, patient dose and quality assurance of radiation systems. The objective of this study was to use Monte Carlo simulation and measurement to verify dose and dose reduction in cephalography. The collimator was constructed with 3-mm thick lead plate, and attached to the tube head to remove regions of disinterest in the radiation field. A digital phantom patient was constructed to evaluate patient dose. In addition, detectors of pixel size 1×1 cm. 2 and 0.1×0.1 cm. 2 were constructed to check collimator location. The effective dose according to International Commission on Radiological Protection 103 was calculated with and without collimation. The effective doses for simulation with and without collimation were 5.09 and 11.32 μSv, respectively. The results of the calculated effective dose show 61.7 % reduction of field area and 55 % of effective dose. The Monte Carlo simulation is a good evaluation tool for patient dose.

Original languageEnglish
Article numberncq596
Pages (from-to)58-64
Number of pages7
JournalRadiation Protection Dosimetry
Issue number1
Publication statusPublished - 2012 Jan

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health
  • Radiation
  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging


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