Effect of readout direction in the edge profile on the modulation transfer function of computed radiographic systems by use of the edge method

Nobukazu Tanaka, Junji Morishita, Norisato Tsuda, Masafumi Ohki

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

We investigated the effect of the readout direction of the edge profile obtained by the edge method on the presampled modulation transfer function (MTF) in various computed radiographic (CR) systems. There were no differences in the MTFs derived from two edge profiles in the sub-scanning direction of four CR systems used in this study. On the other hand, the MTFs measured at a readout direction from the low (edge) to the high (direct exposure) exposure region were higher than those measured at a readout direction from the high to the low exposure region in the laser-beam scanning direction for three of the four CR systems. Although this phenomenon depends on the CR system, it is important to understand and indicate both MTFs at the two edge profiles in the laser-beam scanning direction for accurate assessment of the resolution property.

Original languageEnglish
Pages (from-to)474-479
Number of pages6
JournalRadiological physics and technology
Volume6
Issue number2
DOIs
Publication statusPublished - Jul 2013

All Science Journal Classification (ASJC) codes

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

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