The sacroiliac joints: anatomic, plain roentgenographic, and computed tomographic analysis

Area of Science:

• Radiology
• Anatomy
• Medical Imaging

Background:

• The sacroiliac joint's complex anatomy presents challenges for conventional radiography.
• Accurate imaging is crucial for diagnosing conditions like sacroiliitis.

Purpose of the Study:

• To compare the diagnostic accuracy of computed tomography (CT) versus conventional radiography for evaluating the sacroiliac joint.
• To assess CT's efficacy in detecting early signs of sacroiliitis and joint space narrowing.

Main Methods:

• Utilized a tilted gantry and paraaxial scanning technique with CT.
• Compared CT findings with conventional radiography in patients with sacroiliac joint pathology.

Main Results:

• CT demonstrated superior accuracy in detecting early erosive sacroiliitis.
• CT provided better visualization of joint space narrowing compared to conventional radiography.
• Discrepancies favored CT, with changes often only visible or better seen on CT scans.

Conclusions:

• Computed tomography, particularly with a tilted gantry technique, is more accurate than conventional radiography for sacroiliac joint assessment.
• CT is the preferred imaging modality for early detection of sacroiliitis and joint space narrowing.