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It refers to the position of a penis as it relates to pathology on an X-ray of a pelvis. When the penis (visible on the X-ray as a shadow) points towards the same side as a unilateral medical condition such as a broken bone, this is considered a "positive John Thomas sign," and if the shadow points to the other side, it is a "negative John ...
X-ray of the hips of a 40-year-old female, with dysplasia of her right hip. In the adult hip there are important landmarks to be recognized on plain film radiographs: [ 3 ] The iliopectineal or iliopubic line is formed by the arcuate line of the ilium and the superior border of the superior pubic ramus up to the pubic symphysis.
Pelvimetry is the measurement of the female pelvis. [1] It can theoretically identify cephalo-pelvic disproportion, which is when the capacity of the pelvis is inadequate to allow the fetus to negotiate the birth canal. However, clinical evidence indicate that all pregnant women should be allowed a trial of labor regardless of pelvimetry results.
Radiologic signs are the signs used for diagnosing physiological and pathological conditions in radiologic images. This list includes the names of radiologic signs in alphabetical order. This list includes the names of radiologic signs in alphabetical order.
It is used to ascertain the presence of a tumour or similar anatomy-altering disorders. The sequence of images is roughly as follows: plain or Control KUB image; immediate X-ray of just the renal area; 5 minute X-ray of just the renal area. 15 minute X-ray of just the renal area.
The x-ray film represents a two-dimensional image of a three-dimensional object due to the summary projection of different anatomical structures onto a planar surface. It requires certain skills for the correct interpretation of such images. Radiological anatomy is a necessary component of training for medical students and radiologists.
Atlas image: abdo_wall65 at the University of Michigan Health System - "The Coverings of the Inguinal Canal, External & Internal Oblique & Transversus Abdominis Removed" pelvis at The Anatomy Lesson by Wesley Norman (Georgetown University) (pelvissuperior2, pelvislateral, pelvisinside) Photo at nysora.com; Photo of dissection at chula.ac.th
The Risser sign is an indirect measure of skeletal maturity, whereby the degree of ossification of the iliac apophysis by x-ray evaluation is used to judge overall skeletal development. Mineralization of the iliac apophyses begins at the anterolateral crest and progresses medially towards the spine.