Safety and compatibility of magnetic-controlled growing rods and magnetic resonance imaging

2.50
Hdl Handle:
http://hdl.handle.net/11287/593995
Title:
Safety and compatibility of magnetic-controlled growing rods and magnetic resonance imaging
Authors:
Budd, Henry R.; Stokes, Oliver M.; Meakin, J.; Fulford, J.; Hutton, Mike
Abstract:
PURPOSE: Magnetically controlled growth rods (MCGRs) are a new technology for the management of early-onset pediatric deformity enabling guided spinal growth by controlling the curvature. These rods contain a rare earth magnet and are contraindicated for MRI. We have investigated the behavior MCGRs to determine whether MRI adversely affects rod properties and to determine the extent of image distortion. METHODS: This is an in vitro experiment using two magnetic growth rods secured in a 1.5 T MRI. A gradient echo sequence MRI was performed to evaluate whether the rods elongated, contracted or rotated during scanning and a phantom model was used to evaluate the amount of artifact induced. RESULTS: The rod was not activated or subsequently impaired by the process of MRI. Image distortion of 28.9 cm along the long axis of the magnet and 20.1 cm perpendicular to this was seen with extension 10.6 cm cranial to the magnet housing. No negative effect was demonstrated on the magnetic rod elongation mechanism. CONCLUSIONS: This study has demonstrated that there are no detrimental effects of MRI on the MCGR and imaging of the head and neck phantom can still be interpreted. Further in vivo study is warranted.
Citation:
Eur Spine J. 2016 25(2) 578-82
Publisher:
Springer
Journal:
European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society
Issue Date:
Feb-2016
URI:
http://hdl.handle.net/11287/593995
DOI:
10.1007/s00586-015-4178-5
PubMed ID:
26272372
Additional Links:
http://dx.doi.org/10.1007/s00586-015-4178-5
Type:
Journal Article
Language:
Eng
ISSN:
1432-0932
Appears in Collections:
2015 RD&E publications; Exeter Spinal Surgery Unit

Full metadata record

DC FieldValue Language
dc.contributor.authorBudd, Henry R.en
dc.contributor.authorStokes, Oliver M.en
dc.contributor.authorMeakin, J.en
dc.contributor.authorFulford, J.en
dc.contributor.authorHutton, Mikeen
dc.date.accessioned2016-01-19T12:38:23Zen
dc.date.available2016-01-19T12:38:23Zen
dc.date.issued2016-02en
dc.identifier.citationEur Spine J. 2016 25(2) 578-82en
dc.identifier.issn1432-0932en
dc.identifier.pmid26272372en
dc.identifier.doi10.1007/s00586-015-4178-5en
dc.identifier.urihttp://hdl.handle.net/11287/593995en
dc.description.abstractPURPOSE: Magnetically controlled growth rods (MCGRs) are a new technology for the management of early-onset pediatric deformity enabling guided spinal growth by controlling the curvature. These rods contain a rare earth magnet and are contraindicated for MRI. We have investigated the behavior MCGRs to determine whether MRI adversely affects rod properties and to determine the extent of image distortion. METHODS: This is an in vitro experiment using two magnetic growth rods secured in a 1.5 T MRI. A gradient echo sequence MRI was performed to evaluate whether the rods elongated, contracted or rotated during scanning and a phantom model was used to evaluate the amount of artifact induced. RESULTS: The rod was not activated or subsequently impaired by the process of MRI. Image distortion of 28.9 cm along the long axis of the magnet and 20.1 cm perpendicular to this was seen with extension 10.6 cm cranial to the magnet housing. No negative effect was demonstrated on the magnetic rod elongation mechanism. CONCLUSIONS: This study has demonstrated that there are no detrimental effects of MRI on the MCGR and imaging of the head and neck phantom can still be interpreted. Further in vivo study is warranted.en
dc.language.isoEngen
dc.publisherSpringeren
dc.relation.urlhttp://dx.doi.org/10.1007/s00586-015-4178-5en
dc.titleSafety and compatibility of magnetic-controlled growing rods and magnetic resonance imagingen
dc.typeJournal Articleen
dc.identifier.journalEuropean spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Societyen

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