TY - JOUR
T1 - A simple method for measuring MTF in direct digital intraoral radiography. Technical note
AU - McDavid, William D.
AU - Welander, Ulf
AU - Sanderink, Gerard C.H.
AU - Dove, S. Brent
AU - Tronje, Gunilla
PY - 1994/12
Y1 - 1994/12
N2 - 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.
AB - 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.
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U2 - 10.1016/0030-4220(94)90099-X
DO - 10.1016/0030-4220(94)90099-X
M3 - Article
C2 - 7898914
AN - SCOPUS:0028718439
VL - 78
SP - 802
EP - 805
JO - Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
JF - Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
SN - 2212-4403
IS - 6
ER -