Search Results
Results 51 - 100 of 1533
1 2 3 4 5 6 7 8 9 10 >
Sasaji Tatsuro - - 2012
Intradural extra-arachnoid lumbar disc herniation is a rare disease. Few MRI findings have been reported. We experienced an intradural extra-arachnoid lumbar disc herniation. We reviewed the preoperative MRI findings. Lumbar spine T2-weighted sagittal MRI showed that one line of the ventral dura was divided into two by a disc herniation. ...
Hishida Hiroyuki - - 2012
The authors propose a CT image segmentation method using structural analysis that is useful for objects with structural dynamic characteristics. Motivation of our research is from the area of genetic activity. In order to reveal the roles of genes, it is necessary to create mutant mice and measure differences among ...
Chua Geok-Lin - - 2012
Integrins are signal transducer proteins involved in a number of vital physiological processes including cell adhesion, proliferation and migration. Integrin molecules are hetero-dimers composed of two distinct subunits, α and β. In humans, 18 α and 8 β subunits are combined into 24 different integrin molecules. Each of the subunit ...
Kasch Richard - - 2012
To evaluate changes in nucleus pulposus volume as a potential parameter for the effects of disc decompression. Fifty-two discs (T8 to L1) were extracted from 26 pigs and separated into thoracic (T8 to T11) and thoracolumbar discs (T12 to L1). The discs were imaged using 7.1 Tesla ultrahigh-field magnetic resonance ...
Claudia Chevrefils - - 2012
For some scoliotic patients the spinal instrumentation is inevitable. Among these patients, those with stiff curvature will need thoracoscopic disk resection. The removal of the intervertebral disk with only thoracoscopic images is a tedious and challenging task for the surgeon. With computer aided surgery and 3D visualisation of the interverterbral ...
Lim H K - - 2011
BACKGROUND AND PURPOSE:Current MRI with the CE T1-weighted sequence plays a limited role in the evaluation of facial neuritis due to prominent normal facial nerve enhancement. Our purpose was to retrospectively investigate the usefulness of the CE 3D-FLAIR sequence compared with the CE 3D-T1-FFE sequence in facial neuritis patients.MATERIALS AND ...
Chun Hyoung-Joon - - 2011
OBJECTIVE: The purpose of the present study is to assess the possibility of disc regeneration by treatment with adipose-derived stem cells (ADSCs) in a rabbit model of degenerative disc disease, and to evaluate the efficacy of a percutaneous technique for constructing a model of degenerative disc disease in rabbits. METHODS: ...
Byun W M - - 2011
BACKGROUND AND PURPOSE:Radiologic methods for the diagnosis of chemical radiculitis associated with anular tears in the lumbar spine have been rare. Provocative diskography is one of the methods for diagnosing diskogenic chemical radiculitis but is invasive. A reliable imaging method for replacing provocative diskography and diagnosing chemical radiculitis is required. ...
Akimoto Jiro - - 2012
Oculomotor ophthalmoplegic migraine (O-OPM) occurs in many children, and in some cases MRI shows a small mass in the root exit zone (REZ) of the oculomotor nerve. This mass is considered to result from nerve hypertrophy caused by repeated demyelination. A 51-year-old man has been on oral medication for O-OPM, ...
Kwon J W - - 2011
AIM: To compare three-dimensional (3D) isotropic T2-weighted magnetic resonance imaging (MRI) sequences and reformation with two-dimensional (2D) T2-weighted sequences regarding image quality of the cervical spine at 3T. MATERIALS AND METHODS: A phantom study was performed using a water-filled cylinder. The signal-to-noise and image homogeneity were evaluated. Fourteen (n=14) volunteers ...
Liu Zhan - - 2011
Brainstem tethering is a rare disease. We report and discuss a 20-year-old patient who experienced paroxysmal apnea (a symptom of Ondine's curse) during sleeping, causing him to wake up and control his breathing consciously. A magnetic resonance imaging study revealed that his medulla oblongata was twisted and displaced posteriorly by ...
Dilley Andrew - - 2011
In this pilot study we use T2-weighted magnetic resonance imaging (MRI) to identify possible peripheral nerve inflammation in 4 patients with diffuse chronic pain. In all 4 patients, there was an increase in median and ulnar nerve T2 signal intensity at the wrist (P < 0.05 vs. controls). Positive clinical ...
McCoul Edward D - - 2011
We conducted a retrospective study to compare the clinical characteristics of external auditory canal cholesteatoma (EACC) with those of a similar entity, keratosis obturans (KO). We also sought to identify those aspects of each disease that may lead to complications. We identified 6 patients in each group. Imaging studies were ...
Brodsky Michael C - - 2011
A 5-month-old boy developed a large-amplitude, horizontal pendular flutterlike oscillation of the eyes, when placed in the supine position. Magnetic resonance imaging (MRI) 1 month earlier had shown isolated thickening of the optic nerves and chiasm without other central nervous system signal abnormalities. Repeat MRI at 5½ months of age ...
de Malherbe Maxime - - 2012
To evaluate the accessibility of coronary arteries from chest CT examinations acquired without ECG gating or beta-blockade. Two hundred forty-two patients (median heart rate: 81.7 bpm) underwent a non-ECG-gated CT examination with high pitch and high temporal resolution. Image analysis was obtained by consensus between two readers. The percentage of accessible ...
Gazioglu Sibel - - 2011
Brachial neuritis is characterized by shoulder and arm pain followed by weakness and atrophy of affected muscles and sensory loss in the arm. Isolated sensory involvement of the brachial plexus is very rare. Diagnosis of brachial neuritis is usually based on clinical history and examination, with the confirmation by electrodiagnostic ...
Ueda Megumi - - 2011
PURPOSE: To assess the clinical features of the inferior alveolar canal (IAC) using computed tomography (CT) and to analyze the significance of CT examination at third molar surgery. MATERIALS AND METHODS: A retrospective cohort study was performed involving 99 patients (145 teeth). The relationship between cortication status, buccolingual position, and ...
Liao Cheng-De - - 2011
Purpose:To observe the longitudinal changes of nerve repair in rats after tissue-engineered construct implantation at magnetic resonance (MR) imaging and to determine whether the enhanced nerve regeneration with use of tissue-engineered constructs could be monitored with gadofluorine M-enhanced MR imaging or nerve T2 relaxation time measurement.Materials and Methods:All experimental protocols ...
Guan Jingxia - - 2011
To assess prospectively the significance of sonographic measurements of the median nerve in the diagnosis of carpal tunnel syndrome (CTS), to look for proper parameters and cutoff values for the sonographic diagnosis, and to correlate with the electrophysiological findings. This study involved 30 patients, who were clinically diagnosed as CTS ...
Korbmacher Dirk - - 2011
Petrous apex cholesterol granulomas are slowly expanding lesions that clinically present with a variety of cranial nerve deficits. We present a case of a 40-year-old man with a right-sided, sudden-onset hearing loss. Apart from a 60-dB high-frequency sensorineural hearing loss in the right ear, all other neurotologic examinations were normal. ...
Loke Y C - - 2011
A cantilever has been microfabricated for use in non-contact Atomic Force Microscopy (AFM) using a very thick magnetic film to actuate the cantilever motion. The thick magnetic block is deposited electrochemically over a defined area of the cantilever. This cantilever is particularly suitable for driving stiff AFM cantilevers in a ...
Kim Jae Hyoung - - 2012
To determine whether the abducens nerve is present in patients with type 2 Duane's retraction syndrome (DRS). Retrospective, observational case series. Twelve consecutive patients diagnosed with type 2 DRS. A retrospective review of medical records of ophthalmologic examination and thin-sectioned magnetic resonance imaging (MRI) at the brainstem level and the ...
Herrmann Karl-Heinz KH Medical Physics Group, Institute for Diagnostic and Interventional Radiology I, Jena University Hospital, Jena, Germany. - - 2012
To investigate the potential of a clinical 3 T scanner to perform MRI of small rodents. Different dedicated small animal coils and several imaging sequences were evaluated to optimize image quality with respect to SNR, contrast and spatial resolution. As an application, optimal grey-white-matter contrast and resolution were investigated for ...
Marini Cecilia - - 2011
PURPOSE: Conflicting results have been reported about the clinical value of fluorodeoxyglucose (FDG) imaging in predicting the risk of rupture of abdominal aortic aneurysm (AAA). The present study tests the hypothesis that FDG uptake is low in asymptomatic noninflammatory AAA due to the low cell density in aneurysmal walls. METHODS: ...
Tibesku C O - - 2011
PURPOSE: Long-term success of contemporary total knee replacements relies to a large extent on proper implant alignment. This study was undertaken to test whether specimen-matched cutting blocks based on computed axial tomography (CT) scans could provide accurate rotational alignment of the femoral component. METHODS: CT scans of five fresh frozen ...
Chen Yongsheng - - 2011
In patients presenting with neck and upper limb complaints, MRI changes suggestive of cervical disc disease do not exclude concomitant extraforaminal pathology, as shown in the series of three cases presented here. High-resolution ultrasound of the brachial plexus and peripheral nerves may be useful in identifying an extraforaminal pathology when ...
Yang I Y - - 2011
BACKGROUND: /st>We previously reported a modified transcrural coeliac plexus block (tCPB) case, using parameters obtained from a pre-procedural computed tomography (CT) image of that patient for the subsequent tCPB under fluoroscopy. In this study, we performed the same tCPB simulation on 200 CT images to determine optimal needle placement parameters ...
Işıldak Hüseyin - - 2011
Schwannomas arising from the cochlear nerve and confined to the internal auditory canal are rare. Clinically, a cochlear schwannoma can cause a progressive hearing loss. We report the case of a 56-year-old woman with a cochlear schwannoma that manifested as a slowly progressive hearing loss. The lesion was diagnosed by ...
Hunderfund Andrea N Leep - - 2011
Introduction: Our objective in this study was to assess the diagnostic utility of the median nerve cross-sectional area (CSA) at the wrist, the wrist-forearm ratio, and the wrist-forearm difference in patients with and without carpal tunnel syndrome (CTS). Methods: Individuals with electrodiagnostically proven CTS and asymptomatic control subjects were recruited ...
Ahmed Munawwar - - 2011
Cranial eumycetoma (CE) due to direct inoculation of Madurella grisea into the scalp is extremely rare. We describe a case of CE caused by direct inoculation of M. grisea with the characteristic MRI findings of the "dot-in-circle" sign and a conglomeration of multiple, extremely hypointense "dots."
Fiedorowicz Michal - - 2011
Glaucoma is the second leading cause of blindness. It affects retinal ganglion cells and the optic nerve. However, there is emerging evidence that glaucoma also affects other components of the visual pathway and visual cortex. There is a need to employ new methods of in vivo brain evaluation to characterize ...
Giesemann Anja M - - 2012
To determine features of hypoplasia and aplasia of the vestibulocochlear nerve (VCN) in combination with inner ear malformations (IEMs). Index cases were retrospectively selected from all IEMs collected since 1995. CT and MRI data were reviewed by two neuroradiologists. The number and thickness of visible nerves in the cerebellopontine angle ...
Tanitame Keizo - - 2011
The aim of this study was to compare the three-dimensional fat-suppressed balanced non-steady-state free precession (3D FS-nSSFP) sequence and the 3D T1-weighted spoiled gradient-recalled echo (3D T1-GRE) sequence for evaluating lumbar nerve root compression with continuous thin-slice coronal magnetic resonance (MR) images. The institutional review board approved this study, and ...
Wang Jia-Chi - - 2011
INTRODUCTION: Sciatic neuropathy is a rare but serious complication following surgery performed in the sitting position. METHODS: We report a case of a 12-year-old boy who developed bilateral sciatic neuropathy after a 9-h-long craniotomy while in the sitting position. RESULTS: Magnetic resonance imaging for the lower extremities revealed bilateral swelling ...
Banno Tomohiro - - 2011
Pseudomeningocele arises after spinal fracture and nerve root avulsion or after complications of spine surgery. However, traumatic pseudomeningocele with spina bifida occulta is rare. In this report, a traumatic pseudomeningocele in a patient with spina bifida occulta that required surgical treatment is documented. This 37-year-old man presented to the authors' ...
Tsai Tzu-Hsun - - 2011
To seek evidence of neurovascular compression of motor cranial nerves (CNs) in otherwise idiopathic neuropathic strabismus using high-resolution magnetic resonance imaging (MRI). Prospective, observational case series. High-resolution, surface coil orbital MRI was performed in 10 strabismic patients with idiopathic oculomotor (CN III) or abducens (CN VI) palsy. Relationships between CNs ...
Yamvamoto Junkoh - - 2011
Two women aged 48 and 73 years, respectively, presented with unilateral visual disturbance. On admission, magnetic resonance imaging (MRI) showed an extraaxial mass in the parasellar region. Contrast-enhanced fast imaging with steady-state acquisition (CE-FIESTA) showed that the optic nerves were compressed and encased by the tumors. At an early stage ...
Shabat Shay - - 2011
BACKGROUND: Cervical spine symptoms are a major cause of visits to general or spinal orthopedic surgeons or even primary care physicians. Although in this era the imaging studies can precisely rule out or diagnose pathologies in the spine, all of these studies have limitations. Computerized tomography (CT) scan consists of ...
Impink Bradley G - - 2011
OBJECTIVE: To quantify median nerve characteristics before and after strenuous wheelchair propulsion and relate them to symptoms of carpal tunnel syndrome (CTS). We hypothesized that persons with and without symptoms of CTS would have significantly different nerve characteristics at baseline and after propulsion. DESIGN: A repeated-measures design was used to ...
Chhabra Avneesh - - 2011
MR neurography (MRN) has increasingly been used in clinical practice for the evaluation of peripheral nerve disease. This article reviews the historic perspective of MRN, the current imaging trends of this modality, and the future directions and applications that have shown potential for improved imaging and diagnostic capabilities. MRN has ...
Uzar E - - 2011
Traditionally, nerve conduction study (NCS) are used to diagnose carpal tunnel syndrome (CTS). However, no NCS has the sufficient sensitivity or specificity values to diagnose CTS by itself. Median terminal latency index (mTLI) and median residual latency (mRL) are parameters that calculated to identify abnormalities in distal segments of the ...
Jinnou Hideo - - 2011
We report a male infant with pontocerebellar hypoplasia type 3 and tetralogy of Fallot. He showed optic nerve atrophy, progressive microcephaly, severe psychomotor developmental delay, and vesicoureteral reflux. Magnetic resonance imaging revealed severe hypoplasia of the cerebellar vermis and hemisphere, and of the brainstem including the pons, and simplified gyral ...
Mascitelli Justin R - - 2011
We report a 42-year-old man with a rare carpal tunnel syndrome (CTS) secondary to an osteophyte of the trapezium. The patient presented with a 3-year history of CTS, consisting of progressive pain and paresthesias in his right hand, positive Tinel and Phalen signs, and an electrodiagnostic study demonstrating median nerve ...
Keen Nayela N - - 2011
INTRODUCTION: Early diagnosis of ulnar neuropathy at the elbow is important. Magnetic resonance neurography (MRN) images peripheral nerves. We evaluated the usefulness of elbow MRN in diagnosing ulnar neuropathy at the elbow. METHODS: The MR neurograms of 21 patients with ulnar neuropathy were reviewed retrospectively. MRN was performed prospectively on ...
Zhou Qin - - 2011
Background Microvascular decompression is an etiological strategy for the therapy of trigeminal neuralgia (TN). Preoperative identification of neurovascular compression, therefore, could have an impact on the determination of appropriate treatment for TN. Purpose To evaluate the value of contrast-enhanced and unenhanced three-dimensional (3D) time-of-flight (TOF) MR angiography in the visualization ...
Joslyn Stephen - - 2011
A delay in imaging following intravenous contrast medium administration has been recommended to reduce misdiagnoses. However, the normal variation of contrast enhancement in dogs following a delay has not been characterized. Contrast-enhanced MR imaging of 22 dogs was assessed, in terms of identification of normal anatomic structures, to investigate the ...
Lacerda Leal Paulo Roberto - - 2011
Because diffusion tensor imaging (DTI) is able to assess tissue integrity, we used diffusion to detect abnormalities in trigeminal nerves (TGN) in patients with trigeminal neuralgia (TN) caused by neurovascular compression (NVC). We also studied anatomical TGN parameters (cross-sectional area [CSA] and volume [V]). Using DTI sequencing in a 3-T ...
Roll Shawn C - - 2011
A plethora of research investigates sonography vs. electrodiagnostic testing (EDX) for diagnosis of carpal tunnel syndrome (CTS). Through database searches, hand searches and communication with authors, 582 abstracts published from 1999 to 2009 were identified. A comprehensive systematic review process resulted in inclusion of 23 studies. Significant methodologic discrepancies among ...
Kim Jin - - 2011
HYPOTHESIS:: The purpose of this study was to investigate whether computed tomography (CT) could predict the possibility of first genu exposure of the facial nerve via the transmastoid approach in patients with acute facial paralysis. BACKGROUND:: Temporal bone CT is the best method for visualizing the intratemporal segment of the ...
Bohnstedt Bradley N - - 2011
BACKGROUND:: We describe the use of an intraoperative CT scan obtained using the Medtronic O-arm (Littleton, MA) for image-guided cannulation of the foramen ovale not previously accessible with the use of fluoroscopy alone. Unlike previously described procedures, this technique does not require placement of an invasive head clamp and may ...
1 2 3 4 5 6 7 8 9 10 >