Administrators, Editors, Administrators
3,484
edits
Changes
Jump to navigation
Jump to search
→Evaluation: Yet
The exact geometric magnification of X-rays is generally not known, however, leaving the options:
*If a previous CT has been made, adjust the sizes from a by fixed reference point such as the width of a lumbar vertebra:<br>Actual width = ≈ Width in X-ray / (Width of vertebra on X-ray) x (Width of same vertebra on CT):Yet, this fully corrects the magnification only if the target structure and the reference point are at the same depth.
*Reporting a "roughly estimated" diameter by dividing the measured intestinal diameter in the image and dividing it by a rather arbitrary factor of 1.2. However, this confers a false impression of certainty.
*Reporting a qualitative diameter of the intestine, which may be on a mild-moderate-severe scale. However, the measured diameter still needs to be adjusted for geometric magnification in order to be compared to numbers in the table at right.
