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MR neurography

Atsushi Mizuma, Chikage Kijima, Eiichiro Nagata, Shunya Takizawa
Metastasis of breast cancer is often detected through a long-term course and difficult to diagnose. We report a case of brachial plexopathy suspected to be the initial lesion of breast cancer metastasis, which was only detected by magnetic resonance (MR) neurography. A 61-year-old woman was admitted to our hospital within 2 years after operation for breast cancer because of progressive dysesthesia and motor weakness initially in the upper limb on the affected side and subsequently on the contralateral side...
May 2016: Case Reports in Oncology
Xiaoling Zhang, Meizhi Li, Jian Guan, Huanjun Wang, Shurong Li, Yan Guo, Mingjuan Liu
PURPOSE: To investigate the feasibility of three-dimensional MR neurography (3D MRN) for the sacral plexus using sampling perfection with application-optimized contrasts using different flip angle evolution (SPACE) sequences, and to demonstrate structural abnormalities in the pelvic nerve of women with pelvic endometriosis. MATERIALS AND METHODS: Twenty patients with pelvic endometriosis and 20 healthy controls were examined by contrast-enhanced 3D short time inversion recovery T2-weighted imaging (CE 3D STIR T2WI) SPACE sequences on 3 Tesla MRI...
September 26, 2016: Journal of Magnetic Resonance Imaging: JMRI
Hongjing Bao, Shanshan Wang, Guangbin Wang, Li Yang, Mansoor-Ul Hasan, Bin Yao, Chao Wu, Xu Zhang, Weibo Chen, Queenie Chan, Lebin Wu, Avneesh Chhabra
OBJECTIVES: To investigate the feasibility of diffusion-weighted magnetic resonance neurography (DW-MRN) in the visualisation of extremity nerves in the wrist and palm. METHODS: Thirty-two volunteers and 21 patients underwent imaging of the wrist and palm on a 3-T MR scanner. In all subjects, two radiologists evaluated the image quality on DW-MRN using a four-point grading scale. Kappa statistics were obtained for inter-observer performance. In volunteers, the chi-squared test was used to assess the differences in nerve visualisation on DW-MRN and axial fat-suppressed proton density weighted imaging (FS-PDWI)...
September 15, 2016: European Radiology
Stephen Fisher, Vibhor Wadhwa, Christine Manthuruthil, Jonathan Cheng, Avneesh Chhabra
OBJECTIVES: To study the impact of brachial plexus magnetic resonance neurography (MRN) in diagnostic thinking and therapeutic management of patients with suspected plexopathy. METHODS: MRN examinations of adult brachial plexuses over a period of 18 months were reviewed. Relevant data collection included - patient demographics, clinical history, pre-imaging diagnostic impression, pre-imaging treatment plan, post-imaging diagnosis, post-imaging treatment plan, surgical notes, and electrodiagnostic (ED) results...
August 25, 2016: British Journal of Radiology
Avneesh Chhabra, Courtney A McKenna, Vibhor Wadhwa, Gaurav K Thawait, John A Carrino, Gary P Lees, A Lee Dellon
AIM: To evaluate the pudendal nerve segments that could be identified on magnetic resonance neurography (MRN) before and after surgical marking of different nerve segments. METHODS: The hypothesis for this study was that pudendal nerve and its branches would be more easily seen after the surgical nerve marking. Institutional board approval was obtained. One male and one female cadaver pelvis were obtained from the anatomy board and were scanned using 3 Tesla MRI scanner using MR neurography sequences...
July 28, 2016: World Journal of Radiology
Satish Khadilkar, Bhagyadhan Patel, Khushnuma A Mansukhani, Sunila Jaggi
INTRODUCTION: Immune-mediated demyelinating radiculopathies restricted to proximal sensory or motor roots are uncommon. METHODS: We report the clinical, electrophysiological, biochemical, and radiological features in 2 patients with chronic immune sensorimotor polyradiculopathy (CISMP). RESULTS: The patients presented with sensory ataxia, weakness of the lower limbs, and areflexia. Electrophysiological studies revealed involvement of proximal sensorimotor roots, as evidenced by changes in somatosensory evoked potentials, F-waves, and H-reflexes...
August 17, 2016: Muscle & Nerve
Tomomasa Ishikawa, Kunihiko Asakura, Yasuaki Mizutani, Akihiro Ueda, Ken-Ichiro Murate, Chika Hikichi, Sayuri Shima, Madoka Kizawa, Masako Komori, Kazuhiro Murayama, Hiroshi Toyama, Shinji Ito, Tatsuro Mutoh
INTRODUCTION: To visualize peripheral nerves in patients with chronic inflammatory demyelinating polyneuropathy (CIDP), we used magnetic resonance (MR) imaging. We also quantified the volumes of the brachial and lumbar plexus and their nerve roots. METHODS: Thirteen patients with CIDP and 12 healthy volunteers were enrolled. Whole-body MR neurography based on diffusion-weighted whole-body imaging with background body signal suppression (DWIBS) was performed. Peripheral nerve volumes were calculated from serial axial MR images...
August 8, 2016: Muscle & Nerve
Michael Vaeggemose, Mirko Pham, Steffen Ringgaard, Hatice Tankisi, Niels Ejskjaer, Sabine Heiland, Per L Poulsen, Henning Andersen
PURPOSE: To evaluate if diffusion tensor imaging MR neurography (DTI-MRN) can detect lesions of peripheral nerves in patients with type 1 diabetes. MATERIALS AND METHODS: Eleven type 1 diabetic patients with polyneuropathy (DPN), 10 type 1 diabetic patients without polyneuropathy (nDPN), and 10 healthy controls (HC) were investigated with a 3T MRI scanner. Clinical examinations, nerve-conduction studies, and vibratory-perception thresholds determined the presence of DPN...
July 29, 2016: Journal of Magnetic Resonance Imaging: JMRI
Elisa Ventura, Concetta Manno, Claudio Gobbi, Valerio A Vitale, Alessandro Cianfoni
No abstract text is available yet for this article.
July 12, 2016: Neurology
G Cho Sims, E Boothe, R Joodi, A Chhabra
BACKGROUND AND PURPOSE: The number of centers currently performing 3D fat-suppressed isotropic imaging is limited. If the angular orientations of the major lumbosacral plexus nerves on 3D isotropic MR neurography could be determined, similar planes could be prescribed during acquisition of 2D or 3D nonisotropic techniques for optimal depiction of various nerves. Our aim was to determine oblique sagittal and coronal angular measurements for longitudinal depiction of lumbosacral plexus nerves...
July 7, 2016: AJNR. American Journal of Neuroradiology
Avneesh Chhabra, John A Carrino, Sahar J Farahani, Gaurav K Thawait, Charlotte J Sumner, Vibhor Wadhwa, Vinay Chaudhary, Thomas E Lloyd
PURPOSE: To evaluate the feasibility of whole-body magnetic resonance neurography (WBMRN) in polyneuropathy for technical feasibility, distribution of nerve abnormalities, and differentiation. MATERIALS AND METHODS: Twenty WBMRN examinations were performed on a 3T scanner over 2 years. Patient demographics including history of hereditary and acquired neuropathy were recorded. The images were evaluated by two independent readers with nerve imaging experience for quality...
April 29, 2016: Journal of Magnetic Resonance Imaging: JMRI
Alessandro Salvalaggio, Mario Cacciavillani, Daniele Coraci, Carmen Erra, Roberto Gasparotti, Stefano Ferraresi, Luca Padua, Chiara Briani
No abstract text is available yet for this article.
March 22, 2016: Neurology
Lixia Wang, Yanfeng Niu, Xiangquan Kong, Qun Yu, Xiangchuang Kong, Yinzhang Lv, Heshui Shi, Chungao Li, Wenjun Wu, Bing Wang, Dingxi Liu
OBJECTIVE: To introduce a new 3D magnetic resonance neurography (MRN) method involving a paramagnetic contrast-based T2 effect coupled with an advanced 3D heavily T2W SPACE-STIR high resolution imaging sequence that would enhance the contrast between nervous tissue and surrounding tissues. METHODS: Thirty subjects (average age, 39.6±17.0 years; 18 male and 12 female) were enrolled, including three patients with brachial plexopathy and 27 healthy volunteers. Subjective scores from two neuroradiologists, evaluating noncontrast MRN (cMRN) and 3D SPACE-STIR contrast enhanced MRN (ceMRN) 3D data using a 3-point scoring system, were compared using Wilcoxon signed-rank test...
March 2016: European Journal of Radiology
Andrei Manoliu, Michael Ho, Daniel Nanz, Evelyn Dappa, Andreas Boss, David M Grodzki, Wei Liu, Avneesh Chhabra, Gustav Andreisek, Felix P Kuhn
PURPOSE: Panoramical radiographs or cone-beam computed tomography (CT) are the standard-of-care in dental imaging to assess teeth, mandible, and mandibular canal pathologies, but do not allow assessment of the inferior alveolar nerve itself nor of its branches. We propose a new technique for "MR neurographic orthopantomograms" exploiting ultrashort echo-time (UTE) imaging of bone and teeth complemented with high-resolution morphological and functional MR neurography. MATERIALS AND METHODS: The Institutional Review Board approved the study in 10 healthy volunteers...
August 2016: Journal of Magnetic Resonance Imaging: JMRI
Qi Wan, Shiyang Wang, Jiaxuan Zhou, Qiao Zou, Yingshi Deng, Shouyang Wang, Xiaoying Zheng, Xinchun Li
PURPOSE: To investigate the potential of diffusion tensor imaging (DTI) and T2 measurements in the evaluation of radiation-induced peripheral nerve injury (RIPNI). MATERIALS AND METHODS: RIPNI was produced in a randomly selected side of sciatic nerve in each of 21 rabbits while the contralateral side served as the control. The limb function and MR parameters were evaluated over a 4-month period. Fractional anisotropy (FA), axial diffusivity (λ∥ ), radial diffusivity (λ⊥ ) and T2 values were obtained using 3T MR for quantitative analysis...
June 2016: Journal of Magnetic Resonance Imaging: JMRI
Chengde Liao, Rui Zheng, Changzheng Wei, Jun Yan, Yingying Ding, Guangshun Wang, Zhuolin Li, Zhiping Zhang
PURPOSE: To observe the longitudinal changes in peripheral nerve repaired with chitosan conduits in a rat model of radiation-induced neuropathy. MATERIALS AND METHODS: Four months after 40 Gy radiation to the right lower limbs, forty-two rats were divided randomly into three groups. Chitosan conduits were implanted with (group A, n=12) or without (group B, n=12) mesenchymal stem cells (MSCs), and untreated controls (group C, n=12). Following sciatic nerve MR imaging (including T2WI and Gd-DTPA enhanced T1WI), functional evaluation and electrophysiological exam were performed two-monthly, final histological assessments were done at the end of one year...
May 2016: Magnetic Resonance Imaging
Merel Huisman, Robert M Staruch, Michelle Ladouceur-Wodzak, Maurice A van den Bosch, Dennis K Burns, Avneesh Chhabra, Rajiv Chopra
PURPOSE: Ultrasound (US)-guided high intensity focused ultrasound (HIFU) has been proposed for noninvasive treatment of neuropathic pain and has been investigated in in-vivo studies. However, ultrasound has important limitations regarding treatment guidance and temperature monitoring. Magnetic resonance (MR)-imaging guidance may overcome these limitations and MR-guided HIFU (MR-HIFU) has been used successfully for other clinical indications. The primary purpose of this study was to evaluate the feasibility of utilizing 3D MR neurography to identify and guide ablation of peripheral nerves using a clinical MR-HIFU system...
2015: PloS One
Jan Fritz, Arnold Lee Dellon, Eric H Williams, Allan J Belzberg, John A Carrino
Interventional magnetic resonance (MR) neurography is a minimally invasive technique that affords targeting of small nerves in challenging areas of the human body for highly accurate nerve blocks and perineural injections. This cross-sectional technique uniquely combines high tissue contrast and high-spatial-resolution anatomic detail, which enables the precise identification and selective targeting of peripheral nerves, accurate needle guidance and navigation of the needle tip within the immediate vicinity of a nerve, as well as direct visualization of the injected drug for the assessment of appropriate drug distribution and documentation of the absence of spread to confounding nearby nerves...
November 2015: Magnetic Resonance Imaging Clinics of North America
Avneesh Chhabra, Allan J Belzberg, Gedge D Rosson, Gaurav K Thawait, M Chalian, Sahar J Farahani, Jaimie T Shores, Gene Deune, Shar Hashemi, Shrey K Thawait, Ty K Subhawong, John A Carrino
OBJECTIVE: To evaluate the impact of magnetic resonance neurography (MRN) on diagnostic thinking and therapeutic choices in patients with suspected peripheral neuropathy. METHODS: IRB approval was obtained for this HIPAA-compliant study. Questionnaires were administered to six surgeons regarding the diagnosis and treatment in 85 patients suspected of having peripheral neuropathy, before (pretest) and after (posttest) MRN. Multiple outcome measures related to diagnostic confidence and surgical decision-making were assessed...
May 2016: European Radiology
Mirko Pham, Dimitrios Oikonomou, Benjamin Hornung, Markus Weiler, Sabine Heiland, Philipp Bäumer, Jennifer Kollmer, Peter P Nawroth, Martin Bendszus
OBJECTIVE: The aim of this work was to localize and quantify alterations of nerve microstructure in diabetic polyneuropathy (DPN) by magnetic resonance (MR) neurography with large anatomical coverage. METHODS: Patients (N = 25) with mild-to-moderate (Neuropathy-Symptom-Score [NSS]/Neuropathy Deficit Score [NDS] 3.8 ± 0.3/2.6 ± 0.5) and patients (n = 10) with severe DPN (6.2 ± 0.6/7.4 ± 0.5) were compared to patients (n = 15) with diabetes but no DPN and to age-/sex-matched nondiabetic controls (n = 25)...
December 2015: Annals of Neurology
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