Patient Dose Comparison for Intraoperative Imaging Devices Used in Orthopaedic Lumbar Spinal Surgery.
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Background:The aim of this study was to determine the amount of radiation exposure from intraoperative imaging during two-level and four-level lumbar fusions. Methods:Five imaging systems were studied: multidetector CT (MDCT) scanner (CT A); two mobile CT units (CT B and CT C); a C-arm (D); and fluoroscopy (E). Metal oxide semiconductor field effect transistor dosimeters measured doses at 25 organ locations using an anthropomorphic phantom. A fat-equivalent phantom was used to simulate an obese body mass index (BMI). Results:The effective dose (ED) for C-arm D was estimated using commercial software. The ED for others was computed from the measured mean organ doses. EDs for a normal BMI patient, receiving a four-level fusion, are as follows: CT A (12.00 ± 0.30 mSv), CT B (5.90 ± 0.25 mSv), CT C (2.35 ± 0.44 mSv), C-arm D (0.44 mSv), and fluoroscopy E (0.30 ± 0.3 mSv). The rankings are consistent across all three BMI values except CT C and fluoroscopy E, which peaked in the overweight size because of system limitations. The other machines' ED trended with patient BMI. Conclusion:The dose reduction protocols were confirmed according to the manufacturer's specifications. The results of this study emphasize the need for the appropriate selection of the imaging system, especially because the type of device could have a substantial effect on patient radiation risk.
Published Version (Please cite this version)10.5435/JAAOSGlobal-D-18-00030
Publication InfoFoster, Norah; Yoshizumi, Terry; Moore, Bria; Womack, K Roland; Nguyen, Giao; & Richardson, William (2018). Patient Dose Comparison for Intraoperative Imaging Devices Used in Orthopaedic Lumbar Spinal Surgery. Journal of the American Academy of Orthopaedic Surgeons. Global research & reviews, 2(7). pp. e030. 10.5435/JAAOSGlobal-D-18-00030. Retrieved from https://hdl.handle.net/10161/19051.
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Assistant Professor of Orthopaedic Surgery
I am an Orthopaedic spine surgeon who provides surgical management of the cervical, thoracic and lumbar spine. Among the conditions I see are cervical myelopathy and radiculopathy, disc herniations, lumbar spinal stenosis, degenerative disc disease, spondylolisthesis, scoliosis and spinal deformity, spinal tumors and trauma. I perform open procedures, and when appropriate, minimally invasive and motion-sparing procedures. My primary focus is reestablishing function and relieving pain related to
Professor of Radiology
Major research focus relates to the following areas: New radiation detector development and evaluation; 2-D radiochromic film dosimetry in CT; Development of 3-D dosimetry model in CT; Application of Presage 3D dosimetry in CT; Irradiator dosimetry; Stack monitoring of radioactive tritium gas and radioactive iodine; Shielding design of modern x-ray machines; MDCT and cone-beam CT dosimetry; Application of MOSFET technology in diagnostic radi
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