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A mathematical model for calculating the form distortion in rotational panoramic radiographic systems with a sliding beam path and an elliptical form of the sharply depicted plane was developed. The distortion of a spherical model object was calculated for two different systems exemplifying properties of commercially available equipment. The spherical object was distorted toward an ovoid shape in the image. No marked deviations were found between this ovoid distortion and the ellipsoid distortion previously calculated for a theoretical system having a constant effective projection radius and a cylindrical form of the sharply depicted plane. Except for extremely displaced objects in the anterior region the form reproduction in sliding rotational panoramic systems seems to be satisfactory for clinical purposes.
G Tronje, and
U Welander, and
W D McDavid, and
C R Morris
February 1983,
Tandlakartidningen,
G Tronje, and
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C R Morris
May 1993,
The Bulletin of Tokyo Dental College,
G Tronje, and
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C R Morris
January 1982,
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G Tronje, and
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W D McDavid, and
C R Morris
August 1991,
Dento maxillo facial radiology,
G Tronje, and
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C R Morris
January 1982,
Oral surgery, oral medicine, and oral pathology,
G Tronje, and
U Welander, and
W D McDavid, and
C R Morris
August 1981,
Oral surgery, oral medicine, and oral pathology,
G Tronje, and
U Welander, and
W D McDavid, and
C R Morris
December 1990,
Aichi Gakuin Daigaku Shigakkai shi,
G Tronje, and
U Welander, and
W D McDavid, and
C R Morris
January 1987,
Dento-maxillo-facial radiology. Supplement,
G Tronje, and
U Welander, and
W D McDavid, and
C R Morris
May 1990,
Tandlaegebladet,
G Tronje, and
U Welander, and
W D McDavid, and
C R Morris
May 1995,
Dento maxillo facial radiology,
