"Incomplete ring" sign: a simple method for CT detection of spondylolysis

Area of Science:

• Radiology
• Orthopedics
• Medical Imaging

Background:

• Spondylolysis diagnosis using lumbar CT scans presents challenges.
• Existing methods can be time-consuming and complex.

Purpose of the Study:

• To describe a simple and effective method for detecting spondylolysis on lumbar CT.
• To improve the efficiency and accuracy of spondylolysis diagnosis.

Main Methods:

• Review of lumbar CT images.
• Identification of intact cortical rings in each vertebra.
• Assessment of vertebral cortical ring integrity for spondylolysis detection.

Main Results:

• The presence of one intact cortical ring per vertebra definitively excludes spondylolysis.
• Absence of an intact cortical ring indicates a defect, confirming spondylolysis.
• This method simplifies the diagnostic process by reducing the need for exhaustive image searching.

Conclusions:

• A straightforward visual assessment of vertebral cortical rings on lumbar CT can reliably diagnose or exclude spondylolysis.
• This technique offers a more efficient alternative to conventional methods for identifying spondylolysis.
• Improved diagnostic accuracy and reduced interpretation time are key benefits.