81000120

open access

Version of Record

Anatomical Variations with Joint Space Measurements on CT

English (英語)

The Kobe journal of the medical sciences

53(5)

209-217

Kobe University School of Medicine

2007-01

2008-02-20

This study has been performed to demonstrate the type and frequency of theanatomical variations of the sacroiliac joint according to age, gender, Body Mass Indexand childbirth, and the influence of the anatomical variants to the uniformity andwidth of the joint space.It was conducted on 400 consecutive patients without sacroiliac complaint whounderwent pelvic CT scanning for various reasons. Patients' ages were 15 or above.Anatomical variants that we observed were accessory sacroiliac joint (70 patients,17.5%), iliosacral complex (38 patients, 9.5%), bipartite iliac bony plate (22 patients,5.5%), semicircular defects on iliac/ sacral side (19 patients, 4.8%), crescent like iliacbony plate (14 patients, 3.5%) and ossification centers (4 patients, 1.0%). The meanjoint space width of the 400 patients was 1.72±0.57 mm (from 0.77 mm to 4.39 mm). Inadults below 40 years of age, the measured width was 2.49±0.66 mm. In older patients,1.47±0.21 mm. Joints which presented anatomical variants (206 articulations) had anon-uniform joint space in 164 (79.6%), whereas uniform joint space were seen in 42(20.4%) articulations. The joint width were less than 2 mm in 193 (93.7%) articulationsand in 13 (6.3%) articulations were greater or equal to 2 mm.This study has demonstrated that anatomical variations and joint space areindependently related to age, gender, Body Mass Index and childbirth in patients. Webelieve that all this information is helpful to interpret and examine the sacroiliaccomputed tomography images.

computed tomography

紀要論文