Thesis
Surgical decision making based on magnetic resonance imaging as compared to computed tomography in an identical population of chondrodystrophic dogs with intervertebral disc extrusion
Washington State University
Master of Science (MS), Washington State University
2015
Handle:
https://hdl.handle.net/2376/103055
Abstract
Objective – To determine the inter- and intra-observer agreement for hemilaminectomy with respect to surgical location, side of surgery and size of laminectomy defect planned from magnetic resonance (MR) imaging versus computed tomography (CT) in chondrodystrophic dogs with thoracolumbar intervertebral disc extrusion. Design – Prospective evaluation study. Sample Population – Chondrodystrophic dogs with intervertebral disc extrusion (sample size = 40). Procedure – Each dog underwent pre-operative magnetic resonance imaging and computed tomography scans. Images were randomized and observers were blinded to animal identity. Inter- and intra-observer of hemilaminectomy surgical plan was assessed. Hemilaminectomy plan included anatomic localization of laminectomy defect, side of surgical approach and number of articular facets removed. Results – The inter-observer agreement between MR and CT for hemilaminectomy site along the vertebral column was 71.9% and for lateralization it was 84%. Inter-observer agreement between MR and CT for the number of facets removed was 40.6%. The intra-observer agreement for location was as follows - Observer 1: 75%, Observer 2: 75%, Observer 3: 72%, Observer 4: 75%. The intra-observer agreement for lateralization was as follows - Observer 1: 93.8%, Observer 2: 96.9%, Observer 3: 90.6%, Observer 4: 93.8%. Observers 1, 2 and 4 planned on creating a larger hemilaminectomy more often when planning from CT as compared to MR (P = 0.7318, P = 0.6186, P = 0.7551 respectively). Conclusions and Clinical Relevance – Findings from this study indicated inter-observer and intra-observer agreement between MR and CT are good for location of the lesion and very good for lateralization. Inter-observer and intra-observer agreement for hemilaminectomy defect size was fair and good, respectively. There was a trend among observers to remove more facets when planning a hemilaminectomy using CT versus MR. Although this finding was not statistically significant, there are serious clinical consequences associated with an inaccurately-sized laminectomy defect with respect to perioperative morbidity, and spinal destabilization.
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Details
- Title
- Surgical decision making based on magnetic resonance imaging as compared to computed tomography in an identical population of chondrodystrophic dogs with intervertebral disc extrusion
- Creators
- Julie Ann Noyes
- Contributors
- Stephanie A. Thomovsky (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Veterinary Medicine, College of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525034601842
- Language
- English
- Resource Type
- Thesis