Radiation dose reduction in thoracic and lumbar spine instrumentation using navigation based on an intraoperative cone beam CT imaging system: a prospective randomized clinical trial
- 22.07.2017
- Original Article
Erschienen in:
- Verfasst von
- Nathalie Pireau
- Virginie Cordemans
- Xavier Banse
- Nadia Irda
- Sébastien Lichtherte
- Ludovic Kaminski
- Erschienen in
- European Spine Journal | Ausgabe 11/2017
Abstract
Purpose
Spine surgery still remains a challenge for every spine surgeon, aware of the potential serious outcomes of misplaced instrumentation. Though many studies have highlighted that using intraoperative cone beam CT imaging and navigation systems provides higher accuracy than conventional freehand methods for placement of pedicle screws in spine surgery, few studies are concerned about how to reduce radiation exposure for patients with the use of such technology. One of the main focuses of this study is based on the ALARA principle (as low as reasonably achievable).
Method
A prospective randomized trial was conducted in the hybrid operating room between December 2015 and December 2016, including 50 patients operated on for posterior instrumented thoracic and/or lumbar spinal fusion. Patients were randomized to intraoperative 3D acquisition high-dose (standard dose) or low-dose protocol, and a total of 216 pedicle screws were analyzed in terms of screw position. Two different methods were used to measure ionizing radiation: the total skin dose (derived from the dose–area product) and the radiation dose evaluated by thermoluminescent dosimeters on the surgical field.
Results
According to Gertzbein and Heary classifications, low-dose protocol provided a significant higher accuracy of pedicle screw placement than the high-dose protocol (96.1 versus 92%, respectively). Seven screws (3.2%), all implanted with the high-dose protocol, needed to be revised intraoperatively. The use of low-dose acquisition protocols reduced patient exposure by a factor of five.
Conclusion
This study emphasizes the paramount importance of using low-dose protocols for intraoperative cone beam CT imaging coupled with the navigation system, as it at least does not affect the accuracy of pedicle screw placement and irradiates drastically less.
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- Titel
- Radiation dose reduction in thoracic and lumbar spine instrumentation using navigation based on an intraoperative cone beam CT imaging system: a prospective randomized clinical trial
- Verfasst von
-
Nathalie Pireau
Virginie Cordemans
Xavier Banse
Nadia Irda
Sébastien Lichtherte
Ludovic Kaminski
- Publikationsdatum
- 22.07.2017
- Verlag
- Springer Berlin Heidelberg
- Erschienen in
-
European Spine Journal / Ausgabe 11/2017
Print ISSN: 0940-6719
Elektronische ISSN: 1432-0932 - DOI
- https://doi.org/10.1007/s00586-017-5229-x
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