Dose reduction technique in diagnostic X-ray computed tomography by use of 6-channel multileaf collimators

Fumio Hashimoto, Atsushi Teramoto, Yasuki Asada, Shoichi Suzuki, Hiroshi Fujita

Research output: Contribution to journalArticle

Abstract

Recently, region-setting computed tomography (CT) has been studied as a region of interest imaging method. This technique can strongly reduce the radiation dose by limiting the irradiation field. Although mathematical studies have been performed for reduction of the truncation artifact, no experimental studies have been performed so far. In this study, we developed a three-dimensional region-setting CT system and evaluated its imaging properties. As an experimental system, we developed an X-ray CT system with multileaf collimators. In this system, truncated projection data can be captured by limiting of the radiation field. In addition, a truncated projection data correction was performed. Finally, image reconstruction was performed by use of the Feldkamp–Davis–Kress algorithm. In the experiments, the line profiles and the image quality of the reconstructed images were evaluated. The results suggested that the image quality of the proposed method is comparable to that of the original method. Furthermore, we confirmed that the radiation dose was reduced when this system was used. These results indicate that a 3D region-setting CT system using 6-channel multileaf collimators can reduce the radiation dose without in causing a degradation of image quality.

Original languageEnglish
Pages (from-to)60-67
Number of pages8
JournalRadiological Physics and Technology
Volume10
Issue number1
DOIs
Publication statusPublished - 01-03-2017

Fingerprint

X Ray Computed Tomography
collimators
Radiography
tomography
Radiation
dosage
Tomography
x rays
radiation
projection
Computer-Assisted Image Processing
image reconstruction
Artifacts
radiation distribution
artifacts
degradation
irradiation
profiles
approximation

All Science Journal Classification (ASJC) codes

  • Radiation
  • Physical Therapy, Sports Therapy and Rehabilitation
  • Radiology Nuclear Medicine and imaging

Cite this

Hashimoto, Fumio ; Teramoto, Atsushi ; Asada, Yasuki ; Suzuki, Shoichi ; Fujita, Hiroshi. / Dose reduction technique in diagnostic X-ray computed tomography by use of 6-channel multileaf collimators. In: Radiological Physics and Technology. 2017 ; Vol. 10, No. 1. pp. 60-67.
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Dose reduction technique in diagnostic X-ray computed tomography by use of 6-channel multileaf collimators. / Hashimoto, Fumio; Teramoto, Atsushi; Asada, Yasuki; Suzuki, Shoichi; Fujita, Hiroshi.

In: Radiological Physics and Technology, Vol. 10, No. 1, 01.03.2017, p. 60-67.

Research output: Contribution to journalArticle

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