A simple method for measuring MTF in direct digital intraoral radiography. Technical note

William D. McDavid, Ulf Welander, Gerard C.H. Sanderink, S. Brent Dove, Gunilla Tronje

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Conventional methods for measuring the modulation transfer function require the exposure of a narrow slit or straight edge followed by computationally intense data analysis. An alternative method applicable to digital systems uses the standard deviation of gray levels within different frequency regions of a bar pattern. To verify that this method gave reliable results, measurements performed for two systems for intraoral radiography with the use of this method have been compared with modulation transfer function values calculated from Fourier transformations of line spread functions measured for the two systems. The almost identical results confirm the consistency of both sets of modulation transfer function measurements and demonstrate the utility of the bar pattern method for performing rapid measurements.

Original languageEnglish (US)
Pages (from-to)802-805
Number of pages4
JournalOral Surgery, Oral Medicine, Oral Pathology
Volume78
Issue number6
DOIs
StatePublished - Dec 1994

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Dentistry(all)

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