Spinal Cord Stimulator Explantation for Magnetic Resonance Imaging: A Case Series

2014 ◽  
Vol 18 (4) ◽  
pp. 285-288 ◽  
Author(s):  
Susan M. Moeschler ◽  
Rebecca A. Sanders ◽  
W. Michael Hooten ◽  
Bryan C. Hoelzer
Keyword(s):  
Magnetic Resonance Imaging ◽  
Spinal Cord ◽  
Magnetic Resonance ◽  
Case Series ◽  
Spinal Cord Stimulator ◽  
Resonance Imaging

scholarly journals Magnetic Resonance Imaging of the Lumbar Spine in a Patient with a Spinal Cord Stimulator

2013 ◽  
Vol 3;16 (3;5) ◽  
pp. E295-E300
Author(s):  
Thomas T. Simopoulos
Keyword(s):  
Magnetic Resonance Imaging ◽  
Spinal Cord ◽  
Case Report ◽  
Lumbar Spine ◽  
Magnetic Resonance ◽  
Adverse Events ◽  
Spinal Cord Stimulation ◽  
Spinal Cord Stimulator ◽  
Resonance Imaging ◽  
Lumbar Mri

Background: The use of magnetic resonance imaging (MRI) is continuously escalating for the evaluation of patients with persistent pain following lumbar spine surgery (LSS). Spinal cord stimulation (SCS) therapy is being clinically applied much more commonly for the management of chronic pain following LSS. There is an increased probability that these 2 incompatible modalities may be accidentally used in the same patient. Objectives: The purpose of this case report is to: (1) summarize a case in which a patient with a thoracic spinal cord stimulator underwent a diagnostic lumbar MRI, (2) describe the 3 magnetic fields used to generate images and their interactions with SCS devices, and (3) summarize the present literature. Study design: Case report. Setting: University hospital. Results: Aside from mild heat sensations in the generator/pocket site and very low intensity shocking sensations in the back while in the MRI scanner, the patient emerged from the study with no clinically detected adverse events. Subsequent activation of the SCS device would result in a brief intense shocking sensation. This persisted whenever the device was activated and required Implantable Pulse Generator (IPG) replacement. Electrical analysis revealed that some of the output circuitry switches, which regulate IPG stimulation and capacitor charge balancing, were damaged, most likely by MRI radiofrequency injected current. Limitations: Single case of a patient with a thoracic SCS having a lumbar MRI study. Conclusion: This case demonstrates the lack of compatibility of lumbar MRI and the Precision SCS system as well as one of the possible patient adverse events that can occur when patients are exposed to MRI outside of the approved device labeling. Key words: Spinal cord stimulation devices, magnetic resonance imaging

Feasibility of cerebral magnetic resonance imaging in patients with externalised spinal cord stimulator

2012 ◽  
Vol 114 (2) ◽  
pp. 135-141 ◽  
Author(s):  
Maarten Moens ◽  
Steven Droogmans ◽  
Herbert Spapen ◽  
Ann De Smedt ◽  
Raf Brouns ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Spinal Cord ◽  
Magnetic Resonance ◽  
Spinal Cord Stimulator ◽  
Resonance Imaging ◽  
Cerebral Magnetic Resonance Imaging

Magnetic resonance imaging in dogs with neuroangiostrongyliasis (rat lungworm disease)

Parasitology ◽  
2020 ◽  
pp. 1-8
Author(s):  
Matthew K. Wun ◽  
Richard Malik ◽  
Jane Yu ◽  
Kathleen E. Chow ◽  
Michelle Lau ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Spinal Cord ◽  
Magnetic Resonance ◽  
Case Series ◽  
Inversion Recovery ◽  
Larva Migrans ◽  
Enzyme Linked Immunosorbent Assay ◽  
Resonance Imaging ◽  
Elisa Testing ◽  
The Brain

Abstract The magnetic resonance imaging (MRI) appearance of the brain and spinal cord in humans with neuroangiostrongyliasis (NA) due to Angiostrongylus cantonensis infection has been well reported. Equivalent studies in animals are lacking. This case series describes clinical and MRI findings in 11 dogs with presumptively or definitively diagnosed NA. MRI of the brain and/or spinal cord was performed using high-field (1.5 T) or low-field (0.25 T) scanners using various combinations of transverse, sagittal, dorsal and three-dimensional (3D) T1-weighted (T1W), transverse, sagittal and dorsal T2-weighted (T2W), T2W fluid-attenuated inversion recovery (FLAIR) and T2*-weighted (T2*W) gradient echo (GRE), dorsal T2W short tau inversion recovery (STIR) and post-gadolinium transverse, sagittal, dorsal and 3D T1W and transverse T2W FLAIR sequences. In 4/6 cases where the brain was imaged, changes consistent with diffuse meningoencephalitis were observed. Evidence of meningeal involvement was evident even when not clinically apparent. The spinal cord was imaged in 9 dogs, with evidence of meningitis and myelitis detected in regions consistent with the observed neuroanatomical localization. Pathognomonic changes of neural larva migrans, as described in some human patients with NA, were not detected. NA should be considered in the differential diagnosis of dogs with MRI evidence of focal or diffuse meningitis, myelitis and/or encephalitis, especially in areas where A. cantonensis is endemic. If not precluded by imaging findings suggestive of brain herniation, cerebrospinal fluid (CSF) collection for cytology, fluid analysis, real-time polymerase chain reaction (qPCR) and enzyme-linked immunosorbent assay (ELISA) testing should be considered mandatory in such cases after the MRI studies.

scholarly journals Changes of Dorsal Root Ganglion Volume in Dogs with Clinical Signs of Degenerative Myelopathy Detected by Water-Excitation Magnetic Resonance Imaging

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1702
Author(s):  
Eiji Naito ◽  
Kohei Nakata ◽  
Yukiko Nakano ◽  
Yuta Nozue ◽  
Shintaro Kimura ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Spinal Cord ◽  
Magnetic Resonance ◽  
Clinical Signs ◽  
Intervertebral Disc Herniation ◽  
Resonance Imaging ◽  
Diagnostic Potential ◽  
Water Excitation ◽  
Spinal Cord Segment ◽  
Degenerative Myelopathy

Canine degenerative myelopathy (DM) is a progressive and fatal neurodegenerative disease. However, a definitive diagnosis of DM can only be achieved by postmortem histopathological examination of the spinal cord. The purpose of this study was to investigate whether the volumetry of DRG using the ability of water-excitation magnetic resonance imaging (MRI) to visualize the DRG in dogs has premortem diagnostic value for DM. Eight dogs with DM, twenty-four dogs with intervertebral disc herniation (IVDH), and eight control dogs were scanned using a 3.0-tesla MRI system, and water-excitation images were obtained to visualize and measure the volume of DRG, normalized by body surface area. The normalized mean DRG volume between each spinal cord segment and mean volume of all DRG between T8 and L2 in the DM group was significantly lower than that in the control and the IVDH groups (P = 0.011, P = 0.002, respectively). There were no correlations within the normalized mean DRG volume between DM stage 1 and stage 4 (rs = 0.312, P = 0.128, respectively). In conclusion, DRG volumetry by the water-excitation MRI provides a non-invasive and quantitative assessment of neurodegeneration in DRG and may have diagnostic potential for DM.

Multisession CyberKnife Radiosurgery for Intramedullary Spinal Cord Arteriovenous Malformations

Neurosurgery ◽  
2006 ◽  
Vol 58 (6) ◽  
pp. 1081-1089 ◽  
Author(s):  
John Sinclair ◽  
Steven D. Chang ◽  
Iris C. Gibbs ◽  
John R. Adler
Keyword(s):  
Magnetic Resonance Imaging ◽  
Spinal Cord ◽  
Magnetic Resonance ◽  
Arteriovenous Malformations ◽  
Conus Medullaris ◽  
Spinal Angiography ◽  
Resonance Imaging ◽  
Intramedullary Spinal Cord ◽  
Cyberknife Radiosurgery

Abstract OBJECTIVE: Intramedullary spinal cord arteriovenous malformations (AVMs) have an unfavorable natural history that characteristically involves myelopathy secondary to progressive ischemia and/or recurrent hemorrhage. Although some lesions can be managed successfully with embolization and surgery, AVM size, location, and angioarchitecture precludes treatment in many circumstances. Given the poor outlook for such patients, and building on the successful experience with radiosurgical ablation of cerebral AVMs, our group at Stanford University has used CyberKnife (Accuray, Inc., Sunnyvale, CA) stereotactic radiosurgery (SRS) to treat selected spinal cord AVMs since 1997. In this article, we retrospectively analyze our preliminary experience with this technique. METHODS: Fifteen patients with intramedullary spinal cord AVMs (nine cervical, three thoracic, and three conus medullaris) were treated by image-guided SRS between 1997 and 2005. SRS was delivered in two to five sessions with an average marginal dose of 20.5 Gy. The biologically effective dose used in individual patients was escalated gradually over the course of this study. Clinical and magnetic resonance imaging follow-up were carried out annually, and spinal angiography was repeated at 3 years. RESULTS: After a mean follow-up period of 27.9 months (range, 3–59 mo), six of the seven patients who were more than 3 years from SRS had significant reductions in AVM volumes on interim magnetic resonance imaging examinations. In four of the five patients who underwent postoperative spinal angiography, persistent AVM was confirmed, albeit reduced in size. One patient demonstrated complete angiographic obliteration of a conus medullaris AVM 26 months after radiosurgery. There was no evidence of further hemorrhage after CyberKnife treatment or neurological deterioration attributable to SRS. CONCLUSION: This description of CyberKnife radiosurgical ablation demonstrates its feasibility and apparent safety for selected intramedullary spinal cord AVMs. Additional experience is necessary to ascertain the optimal radiosurgical dose and ultimate efficacy of this technique.

scholarly journals Magnetic resonance imaging findings in children with Parry-Romberg syndrome and en coup de sabre

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Harry Knights ◽  
Elizabeth Minas ◽  
Faraan Khan ◽  
Lindsay Shaw ◽  
Muthana Al Obaidi ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
White Matter ◽  
Magnetic Resonance ◽  
Brain Imaging ◽  
Case Series ◽  
Dystrophic Calcification ◽  
Resonance Imaging ◽  
Cutaneous Manifestations ◽  
Street Hospital ◽  
Parry Romberg Syndrome

Abstract Background The aim of this study was to: (i) describe the abnormalities seen on brain imaging in a group of children with en coup de sabre (EDCS) with/without Parry-Romberg syndrome (PRS); and (ii) identify clinical predictors of brain imaging abnormalities. Methods This was a single centre (Great Ormond Street Hospital, London) retrospective case series of patients with ECDS/PRS seen from 2000 to 2018. We identified patients with cutaneous manifestations consistent with the clinical descriptions of ECDS/PRS. Presenting clinical, laboratory, and radiological brain findings are described. Results are expressed as medians and ranges or frequencies and percentages. Fisher’s exact test was used to identify clinical associations with magnetic resonance imaging (MRI) abnormalities. Results Fourteen patients were studied: 6 males and 8 females; median age 14 years (range 3–20). We observed neuroimaging abnormalities in 2/6 ECDS and 5/8 ECDS/PRS patients. White matter signal abnormality, dystrophic calcification, leptomeningeal enhancement, and sulcal crowding were the typical findings on brain imaging. A total of 50% of patients had no MRI abnormality despite some of these patients having neurological symptoms. The presence of seizures was significantly associated with ipsilateral enhanced white matter signalling on MRI (p < 0.05). Conclusions In summary, we observed several distinct radiographic patterns associated with ECDS/PRS. Seizure disorder was strongly associated with the presence of ipsilateral enhanced white matter signalling. Improved neuroimaging techniques that combine morphological with functional imaging may improve the detection rate of brain involvement in children with ECDS/PRS in the future.

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