Investigation of optimum grid for digital radiography

Kentaro Naka, Nobukazu Tanaka, Seiji Kumazawa, Junji Morishita, Hidetaka Arimura, Fukai Toyofuku, Masafumi Ohki, Yoshiharu Higashida

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The purpose of this study was to investigate the optimal anti-scatter grid (grid) selection for digital radiography with a computed radiography (CR) system. Anterior-posterior lumbar spine radiographies were performed with no grid and grid ratios of 5, 8, 10, 12 and 14 under the same exposure conditions. An x-ray tube voltage of 80 kV and 20 mAs were used in all radiographies. Signal-to-noise-ratio (SNR) for all radiographic technique was measured as an image quality index. To consider the effect of image quality, scatter fractions, incident doses to imaging plate (IP) were also measured. The use of grid ratios of 10, 12 and 14 provided higher SNR than those of the images with grid ratios of 5 and 8 when same exposure conditions were used. Phantom radiographs also indicated that the images with 10, 12 and 14 grid ratios improved image quality over that obtainable with images of lower grid ratios although the images look noisy.

Original languageEnglish
Title of host publicationWorld Congress on Medical Physics and Biomedical Engineering
Subtitle of host publicationDiagnostic Imaging
PublisherSpringer Verlag
Number of pages3
ISBN (Print)9783642038785
Publication statusPublished - 2009
EventWorld Congress on Medical Physics and Biomedical Engineering: Diagnostic Imaging - Munich, Germany
Duration: Sept 7 2009Sept 12 2009

Publication series

NameIFMBE Proceedings
ISSN (Print)1680-0737


OtherWorld Congress on Medical Physics and Biomedical Engineering: Diagnostic Imaging

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Biomedical Engineering


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