Search Results
Results 1 - 50 of 1537
1 2 3 4 5 6 7 8 9 10 >
Cui Jiao-Long JL Department of Orthopaedics and Traumatology, The University of Hong Kong, 12 Sandy Bay Road, Pokfulam, Hong - - 2014
Cervical spondylotic myelopathy (CSM) is a common spinal cord disorder in the elderly. Diffusion tensor imaging (DTI) has been shown to be of great value for evaluating the microstructure of nerve tracts in the spinal cord. Currently, the quantitative assessment of the degeneration on the specific tracts in CSM is ...
Chaudhry U S US From the Department of Radiology (U.S.C., D.E.D., B.A.P.) and Section of Neuroradiology (D.E.D., B.A.P.), University of Iowa Hospitals and Clinics, Iowa City, - - 2014
Enhancing lesions on brain MR imaging can present a diagnostic quandary as both benign lesions such as brain capillary telangiectasia and pathologic lesions such as demyelination may appear similar. Stagnation of blood in low-flow venous channels of brain capillary telangiectasias results in susceptibility effect secondary to the increased local deoxyhemoglobin. ...
Oh Jungsu S JS Departments of aNuclear Medicine bNeurology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South - - 2014
The cerebellum (CB) consists of complex anatomical and functional subregions. To better investigate the complicated functional anatomy, a detailed subregional analysis and/or a precise spatial normalization of the fluorine-18 fluorodeoxyglucose (F-FDG) PET imaging data are essential. Here, the 28 MRIcron CB volumes of interests (VOIs) template merged into eight cerebellar ...
Gliebus Gediminas G Department of Neurology, Hahnemann University Hospital, Philadelphia, - - 2014
A 19-month-old, white, Pennsylvanian boy, with an unremarkable medical history, presented to our hospital with a 3-week history of nonbloody, nonbilious emesis up to 5 times a day and nonbloody diarrhea. Ten days before admission, his gait became progressively unsteady, until he finally refused to walk. A day before admission, ...
Edlow Brian L - - 2012
Intracerebral hemorrhage (ICH) expansion is common during the first 24 h after onset, but the pattern and pace of hyperacute hemorrhage growth have not been described because serial imaging is typically performed over the course of hours and days, not minutes. The purpose of this study is to elucidate the spatial ...
Rusu Mugurel Constantin - - 2012
The anatomy of the pterygopalatine fossa keeps a traditional level and is viewed as constant, even though a series of structures neighboring the fossa are known to present individual variations. We aimed to evaluate on 3D volume renderizations the anatomical variables of the pterygopalatine fossa, as related to the variable ...
Tuite Michael J - - 2012
PURPOSE: To determine the prevalence of a normal variant cleft/recess at the labral-chondral junction in the anterior, inferior, and posterior portions of the shoulder joint. MATERIALS AND METHODS: One hundred and three consecutive patients (106 shoulders) who had a direct MR arthrogram followed by arthroscopic surgery were enrolled in this ...
Moon Chan Hong - - 2012
Development of a dual-tuned proton/sodium radiofrequency (RF) coil for magnetic resonance imaging (MRI) of the rabbit spine and quantification of sodium concentration in intervertebral discs. To develop the dual-tuned proton/sodium MRI of rabbit lumbar spine to investigate proteoglycan matrix content and intervertebral disc degeneration (IDD). IDD is a common chronic ...
Moon Chan Hong - - 2012
Comparison of sodium concentration ([Na]) and proton T2 relaxation time between normal and degenerated discs in a rabbit model. The purpose of this article was to evaluate quantitative [Na] and T2 characteristics of discs associated with degenerative changes. Intervertebral disc degeneration is a common chronic condition that may lead to ...
Kranenburg Hendrik-Jan C - - 2012
A hydrogel nucleus pulposus prosthesis (NPP) was designed to swell in situ, have intrinsic radiopacity, and restore intervertebral disc height and biomechanical functionality. These features were examined using an ex vivo canine lumbar model. Nine NPPs were implanted in five spines and their visibility was assessed on radiography, computed tomography ...
Wang Yi-Xiang J - - 2012
OBJECTIVE: To determine the relative performance of T1rho and T2 relaxation times in disc degeneration assessment. METHODS: Lumbar sagittal MRI was performed at 3 T in 52 subjects. With a spin-lock frequency of 500 Hz, T1rho was measured using a rotary echo spin-lock pulse embedded in a three-dimensional (3D) balanced fast field ...
Teske W - - 2012
Free disc fragments end often up in the concavity of the anterior epidural space. This space consists of two compartments. The discrepancy between the impressive magnetic resonance imaging findings, clinical symptoms in patients and the problem of treatment options led us to the anatomical determination of anterior epidural space volumes. ...
Ichimura Shinya - - 2012
The drainage of the superficial middle cerebral vein (SMCV) is classified into four subtypes. The sphenobasal vein (SBV) drains from the SMCV to the pterygoid venous plexus at the temporal skull base. Epidural procedures in the standard anterior transpetrosal approach (ATPA) may damage the route of the SBV. We report ...
Nugent Allison C - - 2012
Multiple techniques exist for the automated segmentation of magnetic resonance images (MRIs). The validity of these techniques can be assessed by evaluating test-retest reliability, interscanner reliability, and consistency with manual segmentation. We evaluate these measures for the FSL/FIRST subcortical segmentation tool. We retrospectively analyzed 190 MRI scans from 87 subjects ...
Leckie Ashley E - - 2012
STRUCTURED ABSTRACT: Study Design: An in vitro biomechanical and imaging study generated from an in vivo porcine model of early stage degenerate disc disease was used to evaluate mechanical property restoration comparing 2 minimally invasive injection techniques.Objective: To evaluate the ability of an injectable hydrogel to restore the mechanical properties ...
Farghal Aser - - 2012
BackgroundSmall bowel peristalsis is a complex of many individual motion elements. Although each element of peristalsis can be measured there is no current global measure of peristalsis.PurposeTo examine the feasibility of automated computerized assessment of global small bowel motility using simple computational methods.Material and MethodsCoronal dynamic MR images were obtained ...
Singh Harmandeep - - 2012
ABSTRACT: Ectopic thoracic kidney is a very rare congenital defect and is usually diagnosed incidentally. Tc-dimercaptosuccinic acid SPECT-CT images of a 7-year-old boy with left ectopic thoracic kidney are presented here.
Streubel Robert - - 2012
Modification of the curvature in magnetic nanostructures is a novel and elegant way towards tailoring physical phenomena at the nanoscale, allowing to overcome limitations apparent in planar counterparts. Here, we address curvature-driven changes of static magnetic properties in cylindrically curved magnetic segments with different radius of curvature. The curved architectures ...
Gupta Pooja - - 2012
Placenta percreta (PP) is a rare condition and usually presents with postpartum hemorrhage. A 35-year-old woman with 15-weeks pregnancy presented with clot retention. She was diagnosed with PP that was invading the posterior bladder wall. The computed tomography (CT) scan and operative images are presented. She was managed by hysterectomy ...
Yildirim Duzgun - - 2012
PURPOSE: The aim of this study was to present the effect of the peristaltic segment sign for the differential diagnosis between malignant, physiological and gastrointestinal focal fluorodeoxyglucose (FDG) uptakes as an alternative method to maximum standardized uptake value (SUVmax). MATERIALS AND METHODS: Gastrointestinal tract (GIT) sections of 823 FDG positron ...
Sillanpää N - - 2012
BACKGROUND AND PURPOSE:The location of the clot is a major determinant of ischemic stroke outcome. We studied the impact of the location (ICA, proximal M1 segment of the MCA, distal M1 segment, and M2 segment and more distally) of the clot on the CT perfusion parametric maps, the mismatch ratio, ...
Vaccaro Alexander R - - 2012
Intra-abdominal vascular injuries are rare during posterior lumbar spinal surgery, but they can result in major morbidity or mortality when they do occur. We are aware of no prior studies that have used prone patient positioning during magnetic resonance imaging for the purpose of characterizing the retroperitoneal iliac vasculature with ...
Liu Limei - - 2012
Splitting a magnetic resonance imaging (MRI) magnet into two halves can provide a central region to accommodate other modalities, such as positron emission tomography (PET). This approach, however, produces challenges in the design of the gradient coils in terms of gradient performance and fabrication. In this paper, the impact of ...
Li D - - 2012
Purpose: In order to achieve tumor positioning for radiotherapy planning automatically and accurately, an efficient tumor positioning method is proposed by jointly registration and segmentation for 18F-FDG PET-CT scans. Methods: At the first stage, the tumor is segmented from PET scans by region growing using the manual seeds which employs ...
Pepe Pietro - - 2012
A 51-year-old man presented at our department 2 days after the onset of a painful mass in the perineum and dysuria. Diagnosis of partial priapism secondary to proximal segmental corpora cavernosa thrombosis was made through colordoppler ultrasound (CDU) and magnetic resonance imaging (MRI). Treatment consisted of administration of systemic anticoagulation ...
Knafo S Emmanuelle - - 2012
A 23-yr-old black bear (Ursus americanus) was examined because of paralysis of unknown duration. The precise onset of clinical signs was unknown as a result of seasonal torpor. The bear was immobilized and transported to a university veterinary teaching hospital for further evaluation and treatment. Radiography revealed increased mineral opacity ...
Sugimoto Naruto - - 2012
Radiation doses in paediatric computed tomography (CT) were investigated for various types of recent CT scanners with newborn and 6-y-old phantoms in which silicon-photodiode dosemeters were implanted at various organ positions. In the head, chest and abdominal CT for the newborn phantom, doses for organs within the scan region were ...
Cyril Chivot - - 2012
Dural arteriovenous fistula (DAVF) of the anterior condylar canal is a rare subgroup of posterior fossa DAVF. Successful treatment of this DAVF requires an accurate image diagnosis and the knowledge of the anatomy of the anterior condylar confluent. We present the imaging features of angiography and MR angiography of a ...
Yokota Hiroshi - - 2012
We report the clinical significance of anterior cerebral artery (ACA) notching on the optic nerve and chiasm in a 3.5-year-old girl with a craniopharyngioma and progressive blindness. She presented with a headache and vomiting, followed by binocular blindness. Magnetic resonance imaging (MRI) studies demonstrated severely distended A1 segments and ill-depicted ...
Yovel Oren S - - 2012
ABSTRACT:: A 49-year-old woman with painless reduction in visual acuity in her left eye was found to have nonarteritic anterior ischemic optic neuropathy (NAION). Fluorescein angiography revealed optic disc capillary leakage consistent with "luxury perfusion." Contrast-enhanced FLAIR magnetic resonance imaging (MRI) showed marked enhancement of the left optic disc. Resolution ...
Norris Francesca C FC Centre for Advanced Biomedical Imaging, Department of Medicine and UCL Institute of Child Health, University College London, London, United Kingdom. - - 2013
Effective methods for high-throughput screening and morphometric analysis are crucial for phenotyping the increasing number of mouse mutants that are being generated. Automated segmentation propagation for embryo phenotyping is an emerging application that enables noninvasive and rapid quantification of substructure volumetric data for morphometric analysis. We present a study to ...
Clark Robert A RA Department of Ophthalmology, University of California, Los Angeles, CA 90095-7002, - - 2012
The lateral rectus (LR) and medial rectus (MR) extraocular muscles (EOMs) have largely nonoverlapping superior and inferior innervation territories, suggesting functional compartmental specialization. We used magnetic resonance imaging (MRI) in humans to investigate differential compartmental activity in the rectus EOMs during head tilt, which evokes ocular counter-rolling, a torsional vestibulo-ocular ...
Hoppe Sven - - 2012
OBJECTIVES: To demonstrate the potential benefits of biochemical axial T2* mapping of intervertebral discs (IVDs) regarding the detection and grading of early stages of degenerative disc disease using 1.5-Tesla magnetic resonance imaging (MRI) in a clinical setting. METHODS: Ninety-three patients suffering from lumbar spine problems were examined using standard MRI ...
Fujimori Takahito - - 2012
Object In this paper, the authors' goals were to determine the extent of the effect of continuous-type ossification of the posterior longitudinal ligament (OPLL) of the cervical spine on intervertebral range of motion (ROM) and to examine the relationship between the 3D morphology of OPLL and intervertebral ROM. Methods The ...
Luo Jiajia - - 2012
Two-dimensional magnetic resonance imaging (MRI) of posterior vaginal prolapse has been studied. However, the three-dimensional (3-D) mechanisms causing such prolapse remain poorly understood. This discovery project was undertaken to identify the different 3-D characteristics of models of rectocele-type posterior vaginal prolapse (PVP(R)) in women. Ten women with (cases) and ten ...
Fan Shun-Wu - - 2012
The aim of this study was to evaluate early ASD at short-term follow-up in fused and unoperated patients with degenerative disc disease, using quantitative magnetic resonance imaging (MRI) analysis of the area, signal intensity and their product, i.e., MRI index of the central bright area of the disc as well ...
Teufack Sonia - - 2012
BACKGROUND: and Importance: Herniation of intervertebral discs is relatively common. Migration usually occurs in the ventral epidural space; very rarely discs migrate in the subdural space. No cases of intradural intramedullary disc have been reported in humans. CLINICAL PRESENTATION: A case of a herniated intervertebral disc directly into the spinal ...
He Xian - - 2012
ABSTRACT:: Study Design. A retrospective study of magnetic resonance imaging of the lower lumbar spine.Objective. To describe the characteristics of the concave angle of the vertebral endplate (CAVE) and study the association between CAVE and lumbar intervertebral disc degeneration (IVDD).Summary of Background Data. The vertebral endplate is responsible for transferring ...
Whorwell P J - - 2012
Bloating and distension are common complaints in patients with irritable bowel syndrome of which the cause has remained elusive, although it has been shown that the obvious explanation of excessive gas is unlikely. The recent application of technologies such as the gas challenge technique, abdominal inductance plethysmography, CT scanning, as ...
Klee Dirk - - 2012
BACKGROUND: ECG-gated non-enhanced balanced steady-state free precession (bSSFP) MR angiography requires neither breath-holding nor administration of contrast material. OBJECTIVE: To investigate the image quality of free-breathing ECG-gated non-enhanced bSSFP MR angiography of renal arteries in children. MATERIALS AND METHODS: Fourteen boys and seven girls (mean age, 9.7 years; range, 7 weeks-17 years) with ...
Deukmedjian Armen R - - 2012
Object The minimally invasive lateral interbody fusion of the lumbar spine through a retroperitoneal transpsoas approach has become increasingly used. Although preoperative imaging is performed supine, the procedure is performed with the patient in the lateral decubitus position. The authors measured the changes in location of the psoas muscle, aorta, ...
Dias Isabela Maddalena - - 2012
The aim was to evaluate the correlation between disc displacements and degenerative bone changes in magnetic resonance images (MRI) of 112 patients of both genders, with signs and symptoms of temporomandibular disorder. For this purpose, a calibrated examiner evaluated 224 MRI by assigning scores for the displacement of the disc ...
Park In-Seop - - 2012
The objective of this article is to report an anterior cruciate ligament variation that has not been previously described, in which the posterolateral bundle of anterior cruciate ligament is congenitally not developed. The clinical picture and the magnetic resonance images are presented, and the arthroscopic appearance is described.
Varanius Darius - - 2012
The laser intervertebral disc decompression may provide appropriate relief in properly selected patients with contained disc herniations. The present investigation aims to characterise intervertebral disc material by autofluorescence induced by laser light. Degeneration of the intervertebral disc is associated with progressive biochemical changes in disc material. Percutaneous laser disc decompression ...
Jang Ki-Mo - - 2012
This article describes a case of an arthroscopic partial meniscectomy of a posteriorly flipped superior leaflet in a horizontal medial meniscus tear using the posterior transseptal portal. An arthroscopic partial meniscectomy for bucket handle or flap tears in medial or lateral compartments using ordinary portals is a relatively common procedure ...
Stelzeneder David - - 2012
Diurnal changes in T2 values, indicative for changes in water content, have been reported in the lumbar intervertebral discs. However, data concerning short-term T2 changes are missing. The purpose of this study was to investigate the short-term effects of unloading on T2 values in lumbar intervertebral discs in vivo. Experimental ...
Choi Ja-Young - - 2012
Purpose:To compare the diagnostic performance of computed tomographic (CT) arthrography performed with external rotation and active supination (ERAS) with that of CT angiography performed in the neutral position for superior labral anterior-to-posterior (SLAP) lesions.Materials and Methods:Institutional review board approval and informed consent were obtained. CT arthrography in neutral and ERAS ...
Corson James - - 2012
Visualization of myelinated fiber arrangements, cytoarchitecture, and projection fields of afferent fibers in tandem revealed input target selectivity in identified subdivisions of the nucleus tractus solitarii (NTS). The central fibers of the chorda tympani (CT), greater superficial petrosal nerve (GSP), and glossopharyngeal nerve (IX), three nerves that innervate taste buds ...
Mohammadi Afshin - - 2012
Carpal tunnel syndrome (CTS) represents one of the most prevalent peripheral entrapment mononeuropathies. The purpose of our study was to assess the potential correlation between intraneural hypervascularization, flexor retinaculum bowing, and median nerve cross-sectional area and the severity of CTS in cases confirmed by nerve conduction study. Sixty consecutive patients ...
Chalian Majid - - 2012
Diagnosis of tibial neuropathy has been traditionally based on clinical examination and electrodiagnostic studies; however, cross-sectional imaging modalities have been used to increase the diagnostic accuracy and provide anatomic mapping of the abnormalities. In this context, magnetic resonance neurography (MRN) offers high-resolution imaging of the tibial nerve (TN), its branches ...
1 2 3 4 5 6 7 8 9 10 >