Measurement of internal radiation dose distribution in CT examinations using polyethylene terephthalate resin

C. Yamauchi-Kawaura*, S. Yamamoto, K. Fujii, M. Komori, M. Yamauchi, N. Ohzawa, M. Kozuka, N. Suga, N. Ito, A. Fukuyama

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

This study proposes a new dosimetry method for the estimation of the internal radiation dose distribution of a subject undergoing computed tomography (CT) examinations. In this novel method, dose distribution of a subject by CT scans was estimated based on radiophotoluminance distribution with polyethylene terephthalate (PET) resin which was cut to the average head size of a Japanese 1-year-old child. The difference in dose distribution depending on the type of bowtie filter was visualized by imaging luminance distribution with the PET phantom using a charge-coupled device camera. Dose distribution images simulated from a water phantom of the same size as the PET phantom were compared with the luminance distribution images. The linear correlation was demonstrated between luminance of the PET phantom and the simulated water dose. In comparison with the simulated water doses and the converted water doses from luminance of the PET phantom, the relative differences were within 20%.

Original languageEnglish
Pages (from-to)303-309
Number of pages7
JournalRadiation Protection Dosimetry
Volume181
Issue number4
DOIs
Publication statusPublished - 2018 Nov 1
Externally publishedYes

ASJC Scopus subject areas

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

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