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Instrumentation and methodology for the determination of gallstone volume from standard roentgenographic views have been developed. Evaluation of size is made by using video viewing, an operator-set electronic window, intercept registers, and the programming of a PDP/8E for handling the data. The programming makes corrections for geometric factors arising from anatomical variations, corrections for variations in technique, roentgenographic magnification, and provides for the use of several roentgenographic views. The precision of the measuring (video) technique is approximately 0.5 mm as measured on the roentgenogram. Estimates and test data indicate that this system should be capable of an absolute accuracy within 10% of the true volume.
N A Baily, and
R A Keller, and
E C Lasser
July 1990,
Investigative radiology,
N A Baily, and
R A Keller, and
E C Lasser
January 1992,
Archives of physical medicine and rehabilitation,
N A Baily, and
R A Keller, and
E C Lasser
May 2000,
Minerva anestesiologica,
N A Baily, and
R A Keller, and
E C Lasser
July 1985,
Nippon Ganka Gakkai zasshi,
N A Baily, and
R A Keller, and
E C Lasser
January 1998,
The International journal of oral & maxillofacial implants,
N A Baily, and
R A Keller, and
E C Lasser
June 1989,
Liver,
N A Baily, and
R A Keller, and
E C Lasser
January 1989,
The Journal of nursing administration,
N A Baily, and
R A Keller, and
E C Lasser
January 2017,
Journal of medical engineering & technology,
N A Baily, and
R A Keller, and
E C Lasser
February 1976,
Journal of neurology, neurosurgery, and psychiatry,
N A Baily, and
R A Keller, and
E C Lasser
July 1986,
British journal of diseases of the chest,
