Postfusion Magnetic Resonance Imaging Artifacts Caused by a Titanium, Cobalt-Chromium-Molybdenum, and Carbon Intervertebral Disc Spacer
| Autor: | Thorsten Ernstberger, Gabert Heidrich |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Swine
Image quality In Vitro Techniques Thoracic Vertebrae Vitallium 03 medical and health sciences 0302 clinical medicine medicine Animals Orthopedics and Sports Medicine Spinal canal Titanium 030222 orthopedics Artifact (error) medicine.diagnostic_test business.industry Magnetic resonance imaging Intervertebral disc Prostheses and Implants Image Enhancement Magnetic Resonance Imaging Carbon Spinal Fusion medicine.anatomical_structure Surgery Cortical bone Neurology (clinical) Artifacts business Cadaveric spasm 030217 neurology & neurosurgery Biomedical engineering A titanium |
| Zdroj: | Journal of Spinal Disorders & Techniques. 20:154-159 |
| ISSN: | 1536-0652 |
| DOI: | 10.1097/01.bsd.0000211244.52329.21 |
| Popis: | Intervertebral spacers for anterior spine fusion are made of different materials, such as titanium and CoCrMo-alloys or carbon fiber reinforced polymers (CFRP). Implant-related susceptibility artifacts can decrease the quality of magnetic resonance imaging (MRI) scans. This cadaveric study aimed to demonstrate the extent that implant-related MRI artifacting affects the postfusion differentiation of the spinal canal (SC) and intervertebral disc space (IDS). In 6 cadaveric porcine spines, we evaluated the postimplantation MRI scans of a titanium, CoCrMo-spacer and CFRP-spacer that differed in shape and surface qualities. A spacer made of human cortical bone was used as a control. A defined evaluation unit was divided into regions of interest (ROI) to characterize the SC and IDS. Considering 15 different MRI sequences read independently by an interobserver-validated team of specialists artifact-affected image quality of the median MRI slice was rated on a score of 0-1-2-3. A maximum score of 15 points for the SC and 9 points for the IDS (100%) was possible. Turbo spin echo sequences produced the best scores for both spacers and the control. Only the control achieved a score of 100%. For the IDS the CoCrMo-spacer, titanium and CFRP-spacer maximally scored 0%, 0% and 74%, for the SC 60%, 80% and 99%, respectively. By using favored T1 TSE sequences the CFRP-spacer represented clear advantages in postfusion spinal imaging. Independent of artifact dimensions the used scoring system allowed us to create an implant-related ranking of MRI scan quality in reference to the bone control. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|