Accuracy of conventional radiography and computed tomography in predicting implant position in relation to the vertebral canal in dogs.

Hettlich, Bianca Felicitas; Fosgate, Geoffrey T; Levine, Jonathan M; Young, Benjamin D; Kerwin, Sharon C; Walker, Michael; Griffin, Jay; Maierl, Johann (2010). Accuracy of conventional radiography and computed tomography in predicting implant position in relation to the vertebral canal in dogs. Veterinary surgery, 39(6), pp. 680-687. Wiley-Blackwell 10.1111/j.1532-950X.2010.00697.x

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OBJECTIVE To compare the accuracy of radiography and computed tomography (CT) in predicting implant position in relation to the vertebral canal in the cervical and thoracolumbar vertebral column. STUDY DESIGN In vitro imaging and anatomic study. ANIMALS Medium-sized canine cadaver vertebral columns (n=12). METHODS Steinmann pins were inserted into cervical and thoracolumbar vertebrae based on established landmarks but without predetermination of vertebral canal violation. Radiographs and CT images were obtained and evaluated by 6 individuals. A random subset of pins was evaluated for ability to distinguish left from right pins on radiographs. The ability to correctly identify vertebral canal penetration for all pins was assessed both on radiographs and CT. Spines were then anatomically prepared and visual examination of pin penetration into the canal served as the gold standard. RESULTS Left/right accuracy was 93.1%. Overall sensitivity of radiographs and CT to detect vertebral canal penetration by an implant were significantly different and estimated as 50.7% and 93.4%, respectively (P<.0001). Sensitivity was significantly higher for complete versus partial penetration and for radiologists compared with nonradiologists for both imaging modalities. Overall specificity of radiographs and CT to detect vertebral canal penetration was 82.9% and 86.4%, respectively (P=.049). CONCLUSIONS CT was superior to radiographic assessment and is the recommended imaging modality to assess penetration into the vertebral canal. CLINICAL RELEVANCE CT is significantly more accurate in identifying vertebral canal violation by Steinmann pins and should be performed postoperatively to assess implant position.

Item Type:

Journal Article (Original Article)

Division/Institute:

05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV)
05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV) > Small Animal Clinic > Small Animal Clinic, Surgery
05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV) > Small Animal Clinic

UniBE Contributor:

Hettlich, Bianca Felicitas

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0161-3499

Publisher:

Wiley-Blackwell

Language:

English

Submitter:

Bianca Felicitas Hettlich

Date Deposited:

31 Mar 2016 08:52

Last Modified:

31 Mar 2016 08:52

Publisher DOI:

10.1111/j.1532-950X.2010.00697.x

PubMed ID:

20459486

URI:

https://boris.unibe.ch/id/eprint/77339

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