Evaluation of Crossover Sign in Pelvis Models Made with a Three-Dimensional Printer.
biomechanical · Level V
Where this comes from
- Record sourced from PubMed, PMID 35663434.
- Also identified by DOI 10.1155/2022/4665342 and PMC identifier 9162839.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Investigation of the crossover sign (COS) in different degrees of tilt in pelvises made by three-dimensional printing of CT scans among patients with normal hip versions was carried out. Radiology CT scans of 8 normal pelvises reconstructed in 3D and the effect of sequential tilting on the presence of the false-positive COS in 48 radiographs were investigated. The COS was seen in 77% of the AP radiographs during tilt changes. The average distance between the tip of the coccyx and the symphysis pubis was 32.06 ± 10.99 mm. Also, COSs were present in all radiographs from 6 degrees tilt and above. Minor tilting of the pelvis can result in a false-positive crossover sign on AP plain radiographs.
Anatomy
- pelvis