Abstract
Pelvic measurements by means of roentgen rays are indicated and are usually requested in those pregnancies where some abnormality is suspected which might interfere with a normal delivery. Various methods for such measurements have been devised and a review of the literature shows that in each instance either the original author or others have subsequently modified or simplified the technic in an effort to obtain greater accuracy and to eliminate complicated tables of figures or special equipment. Presumably, every known method of measuring the diameters of the pelvis, whether upon the x-ray film or upon the patient by pelvic calipers, has some limitations and is subject to some error. Undoubtedly the most accurate measurements obtainable in the living subject are the true linear diameters as calculated by any of the various methods of roentgen pelvimetry with corrections for the distortion caused by projection of shadows onto the film. Many of the radiographic methods of measuring the pelvic diameters ar...
Published Version
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