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High Speed X-Ray Assessment of the Bony Kinematics of the Cervical Spine During Frontal Impacts
Technical Paper
2005-01-0309
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The aim of this study was to assess the feasibility of using a high speed x-ray system (capable of 1000 frames/sec) to evaluate the bony kinematics of post mortem human surrogate (PMHS) cervical spines at real world speeds during frontal impact.
Whole body frontal impact sled tests were performed on two fresh PMHS specimens. Screws were inserted into the tips of the spinal processes to optimize contrast on the high speed cine x-ray. Head, T1 and sternum accelerations, as well as shoulder, and lap belt forces were recorded.
Vertebral motion was captured using a modified mobile c arm x-ray system, and an image intensifier linked to a high speed camera (Kodak motion corder analyzer, model SR 1000C, Kodak, San Diego, CA, USA)
The variable parameters for the tests were camera frame rate and sled velocity. Tests were performed with delta-V’s (Δv) of approximately 15 kph (8G) and 21 kph (10G). Cine x-rays of the tests were recorded at 250, 500 and 1000 frames/sec. Motion tracking analysis of the bony elements of the cervical spine was performed.
Only tests recorded a 250 frames/sec produced high enough quality images to perform motion analysis.
The results show high speed cine x-ray can be used to directly visualize the bony skeleton, for the assessment of skeletal kinematics during impact. Analysis of bony kinematics using high speed cine x-ray reduces errors caused by extrapolating data from external surface makers. Additionally, the system also offers the potential for detecting the site at which fractures originate. It also allows visualization of the timing of fractures, and the order they occur in.
Further research and testing is required to optimize the use of the system, to increase the field of view and improve image quality at the highest frame rates (> 500 frames/sec).
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Authors
- S. A. Millington - Frank Stronach, Vehicle Safety Institute, Technical University of Graz
- E. Tomasch - Frank Stronach, Vehicle Safety Institute, Technical University of Graz
- E. Mayrhofer - Frank Stronach, Vehicle Safety Institute, Technical University of Graz
- H. Hoschopf - Frank Stronach, Vehicle Safety Institute, Technical University of Graz
- M. Hofinger - Frank Stronach, Vehicle Safety Institute, Technical University of Graz
- H. Steffan - Frank Stronach, Vehicle Safety Institute, Technical University of Graz
- E. P. Leinzinger - The legal Institute for Medicine, Medical University, Graz
- M. Darok - The legal Institute for Medicine, Medical University, Graz
Topic
Citation
Millington, S., Tomasch, E., Mayrhofer, E., Hoschopf, H. et al., "High Speed X-Ray Assessment of the Bony Kinematics of the Cervical Spine During Frontal Impacts," SAE Technical Paper 2005-01-0309, 2005, https://doi.org/10.4271/2005-01-0309.Also In
SAE 2005 Transactions Journal of Passenger Cars: Mechanical Systems
Number: V114-6; Published: 2006-02-01
Number: V114-6; Published: 2006-02-01
References
- Cholewicki J Panjabi MM Nibu K Babat LB Grauer JN Dvorak J Head kinematics during in vitro whiplash simulation Accident Analysis and Prevention 30 (4) 469 79 1998
- Ewing CL Thomas DJ Lustick L Becker E Willems G Muzzs WH III The effect of the initial position of the head and neck on the dynamic response of the human head and neck to Gx – impact acceleration Proceedings of the 19th Stapp car crash conference San Diego 487 512 1975
- Ferrari R The whiplash encyclopaedia 0834216612 Jones and Bartlett Publishers 1999
- Galasko CSB Murray PM Pitcher M Chamber H Mansfield M Madden M Jordan C Kinsella A Hodson M Neck sprains after road traffic accidents: a modern epidemic Injury 24 155 157 1993
- Huelke DF Mackay GM Morris A Bradford M Non-head impact cervical spine injuries in frontal car crashes to lap shoulder-belt occupants International congress and exposition, Detroit, Michigan. SAE paper number 920560 1992
- Huelke DF Mackay GM Morris A Vertebral column injuries and lap-shoulder belts Journal of trauma, injury, infection and critical care 38 (4) 547 556 1995
- Kaneoka K Ono K Inami S Hayashi K. Motion analysis of cervical vertebrae during whiplash loading Spine 24 (8) 763 770 1999
- Kullgren A Krafft M Nygren A Tingvall C Neck injuries in frontal impact: influence of crash plse characteristics on injury risk Accident analysis and prevention 32 197 205 2000
- Langwieder K Hell W Neck injuries in car accidents, causes, problems and solutions Proceedings of the ATA conference Capri P131 146 1996
- Larder DR Twiss MK Mackay GM Neck injury to car occupants using seat belts Proceedings of the 29 th Association for the Advancement of Automotive Medicine conference 1995
- Luan F Yang KH Deng B Begeman PC Tashman S King AI Qualitative analysis of neck kinematics during low speed rear-end impact Clinical Biomechanics 15 649 657 2000
- Matsushita T Sato TB Hirabayashi K Fujimura S Asazuma T Takatori T X-ray study of the human neck motion due to head inertia loading Proceedings of the 38th Stapp Car Crash Conference Fort Lauderdale, Florida p55 64 1994
- Ono K Kaneoka K Wittek A Kajzer J. Cervical injury mechanism based on analysis of human cervical vertebral motion and head-neck-torso kinematics during low speed rear impacts Proceedings of the 41 st Stapp Car Crash Conference, SAE paper number 973340 1997
- Panjabi MM Cholewicki J Nibu K Grauer J Babat LB Dvorak J Critical load of the human cervical spine: an in vitro experimental study Clinical biomechanics 13 239 49 1998a
- Panjabi MM Cholewicki J Nibu K Babat LB Dvorak J Simulation of whiplash trauma using whole cervical spine specimens Spine 23 (1) 17 24 1998b
- Panjabi MM Cholewicki J Nibu K Grauer J Vahldiek M Capsular ligament stretches during in vitro whiplash simulations Journal of Spinal Disorders 11 (3) 227 32 1998c
- Panjabi MM Nibu K Cholewicki J Whiplash injuries and the potential for mechanical instability European Spine Journal 7 (6) 484 92 1998d
- Spitzer WO Skovron ML Salmi LR Cassidy JD Duranceau J Suiss S Ziess E Scientific monograph of the Quebec task force on whiplash associated disorders: redefining whiplash and its management Spine 20 (Apr Suppl) S1 73 1995
- Temming J Zobel R frequency and risk of cervical spine distortion injuries in passenger car accidents: significance of human factors data Proceedings of the International Reasearch Council On biomechanics of Impact (IRCOBI) 219 233 1998
- Walz FH Muser MH Biomechanical aspects of cervical spine injuries. SAE international congress and exhibition, Detroit Michigan SAE paper 950658 1995