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Dreha-Kulaczewski Steffi F - - 2012
PURPOSE: To apply myelin-sensitive quantitative magnetic resonance imaging (MRI) techniques in defined hypomyelinating conditions and to identify spatial patterns of myelination as criteria for characterization of undefined disorders. MATERIALS AND METHODS: Seven patients were included, based on the diagnosis of mitochondrial cytopathy, Pelizaeus-Merzbacher disease, GJA12/GJC2-related Pelizaeus-Merzbacher-like disease, hypomyelination with atrophy ...
Todorović Dajana - - 2012
Abstract PURPOSE: There is considerable concern about potential effects associated with exposure to magnetic fields on organisms. Therefore, duration of pupa-adult development and motor behaviour of adults were analyzed in Tenebrio obscursus and Tenebrio molitor after exposure to static magnetic field (50 mT). MATERIAL AND METHODS: The experimental groups were: ...
Jones T Matthew - - 2012
Leg swelling is a common cause for vascular surgical evaluation, and iliocaval obstruction due to May-Thurner syndrome (MTS) can be difficult to diagnose. Physical examination and planar radiographic imaging give anatomic information but may miss the fundamental pathophysiology of MTS. Similarly, duplex ultrasonographic examination of the legs gives little information ...
Watanabe Takashi - - 2012
This work compares magnetization transfer (MT) MRI of living mice with contrast-enhanced MT MRI using intraventricular administration of gadopentetate dimeglumine (Gd-DTPA), systemic administration of MnCl(2), and both. In MT MRI at 9.4T, the contrast-to-noise ratio (CNR) between white matter (WM) and gray matter (GM) increased by 85% after Gd-DTPA injection ...
Macnair Rory D - - 2012
This study aims to assess the accuracy of metal ion analysis in the diagnosis of adverse reaction to metal debris (ARMD) in patients with metal-on-metal hip arthroplasties by comparing the cobalt and chromium levels in 57 patients (62 hips) to findings on metal artifact reduction magnetic resonance imaging (MRI). An ...
Herda T J - - 2012
The purpose of the present study was to examine the time course of passive range of motion (PROM), passive torque (PAS(TQ) ), and musculo-tendinous stiffness (MTS) responses during constant-angle (CA) and constant-torque (CT) stretching of the leg flexors. Eleven healthy men [mean ± standard deviation (SD): age = 21.5 ± 2.3 years] performed 16 30-s bouts ...
Oyewale S - - 2012
Purpose: To investigate effects of metal artifacts on the dose calculation accuracy of three dose calculation algorithms on CT and cone-beam CT images. Methods: A phantom with and without metal objects was scanned using CT simulator and on-board kV CBCT. Conformal 5-field treatment plans with identical physical and dosimetric parameters ...
Yu P - - 2012
Purpose: Monte Carlo method is the most accurate dose calculation system in the modern world. And we use it to evaluate the influence of computed tomography (CT) metal artifacts resulted from the Henschke applicator in intracavitary brachytherapy dose distribution. Methods: The CT images of the Plastic Water® phantom with Henschke ...
Glide-Hurst C - - 2012
Purpose: High-Z material in CT yields metal artifacts that degrade image quality and may cause substantial errors in dose calculation. This study couples a metal artifact reduction (MAR) algorithm with enhanced 16-bit depth (vs. standard 12-bit) to quantify potential dosimetric differences. Methods: Extended CT to electron density (CT-ED) curves were ...
Mazura Jan C - - 2012
Image de-identification has focused on the removal of textual protected health information (PHI). Surface reconstructions of the face have the potential to reveal a subject's identity even when textual PHI is absent. This study assessed the ability of a computer application to match research subjects' 3D facial reconstructions with conventional ...
Samsonov Alexey - - 2012
Magnetization transfer (MT) imaging quantitatively assesses cerebral white matter disease through its sensitivity to macromolecule-bound protons including those associated with myelin proteins and lipid bilayers. However, traditional MT contrast measured by the MT ratio (MTR) lacks pathologic specificity as demyelination, axon loss, inflammation and edema all impact MTR, directly and/or ...
Hayter Catherine L - - 2012
Magnetic resonance imaging (MRI) is ideally suited to imaging the patient with painful hip arthroplasty due to its superior soft tissue contrast, multiplanar capabilities, and lack of ionizing radiation. MRI is the most accurate imaging modality in the assessment of periprosthetic osteolysis and wear-induced synovitis, and can also assess regional ...
Kasasbeh Aimen - - 2012
Object Mesial temporal sclerosis (MTS) is widely recognized as a significant underlying cause of temporal lobe epilepsy. Magnetic resonance imaging is routinely used in the preoperative evaluation of children with epilepsy. The purpose of this study was to evaluate the prevalence, reliability, and prognostic value of MRI identification of MTS ...
Bayer Thomas - - 2012
PURPOSE: To study the configuration of the proximal interphalangeal joint volar plate (VP) in the crimp grip position (metacarpophalangeal joint at 0° to 45° flexion, proximal interphalangeal joint at 90° to 100° flexion, and distal interphalangeal joint at 0° to 10° hyperextension) using magnetic resonance imaging techniques in healthy volunteers ...
Kim Jin Ho - - 2012
In this study, we compared the magnetic resonance (MR) image artifacts caused by a conventional metal-based cochlear implant and a newly developed liquid crystal polymer (LCP)-based device. The metal-based cochlear implant system (Nurobiosys Co.) was attached to side of the head of a subject and the LCP-based device was attached ...
Kotera Naoko - - 2012
Xenon capsule: A smart (129) Xe NMR-based sensor of Zn(2+) ions for magnetic resonance imaging (MRI) is proposed. The resonance frequency of xenon encapsulated in a cryptophane that bears a nitrilotriacetic ligand moiety varies when Zn(2+) ions are present in solution. With hyper-polarized gas, such a construct enables detection of ...
Carl Michael - - 2012
Recently developed techniques such as the multiple acquisition with variable resonance image combination and slice encoding for metal artifact correction techniques have improved the ability of clinical magnetic resonance scanners to image near metal implants. These sequences are based on fast spin echo sequences which preclude detection of short T(2) ...
Tao Kai - - 2012
OBJECTIVE: To introduce a useful and accurate technique for the locating and removal of small metal foreign bodies in the soft tissues. METHODS: Eight patients presented with suspected small metal foreign bodies retained in the soft tissues of various body districts. Under local anesthesia, 3-6 pieces of 5ml syringe needles ...
Lee Young Han - - 2012
OBJECTIVE: To assess the usefulness of gemstone spectral imaging (GSI) dual-energy CT (DECT) with/without metal artefact reduction software (MARs). METHODS: The DECTs were performed using fast kV-switching GSI between 80 and 140 kV. The CT data were retro-reconstructed with/without MARs, by different displayed fields-of-view (DFOV), and with synthesised monochromatic energy in ...
Nyc Mary Ann - - 2012
Objective. Otitis media (OM) is characterized by increased middle ear effusion and inflammation of middle ear tissue. In this study, we compared two radiographic methods of analyzing inflammation by measuring mucosal thickness (MT). Methods. 28 chinchillas were divided into three treatment groups consisting of a vehicle control group and two ...
Ishida Shimon - - 2012
A 38-year-old woman with Wilson's disease developed neurological deterioration after 25 years of low-dose penicillamine administration. She showed an akinetic-rigid syndrome and cerebellar motor ataxia. Brain MRI showed increased signal intensity at the bilateral pons, midbrain, putamen, and thalamus. 123I-IMP-SPECT revealed a diffuse reduction of cerebral blood flow at the ...
Mamedov Ilgar - - 2011
A Gd(3+) based paramagnetic dextran conjugate has been developed, which enables the tracking of neuroanatomical connectivity in the brain by both MR and optical imaging. Cell studies and subsequent in vivo experiments in rodents demonstrate efficient internalisation and transport properties of the new tracer molecule.
Zhou L - - 2011
Double layered metallic gratings have been investigated both theoretically and experimentally. The authors have reported that tunable magnetic resonance (MR) can be achieved by modulating the vertical chirped width dh which could be controlled conveniently in the common electron and/or ion beam microfabrications. The linear relationship between MR wavelength and ...
Ransberry Victoria E - - 2011
Abstract Critical thermal minimum (CT(min)), a measure of chill-coma onset temperature, and chill-coma recovery (CCR), the time taken to recover from chill coma, are common metrics of thermal tolerance in insects. We investigated the relationship between CT(min) and CCR in a single population of adult Drosophila melanogaster exposed to a ...
Gröhn Olli - - 2011
Status epilepticus or other brain-damaging insults launch a cascade of events that may lead to the development of epilepsy. MRI techniques available today, including T(2) - and T(1) -weighted imaging, functional MRI, manganese enhanced MRI (MEMRI), arterial spin labeling (ASL), diffusion tensor imaging (DTI), and phase imaging, can detect not ...
Varslot T - - 2011
Purpose: In this paper we show that optimization-based autofocus may be used to overcome the instabilities that have, until now, made high-resolution theoretically-exact tomographic reconstruction impractical. To our knowledge, this represents the first successful use of theoretically-exact reconstruction in helical micro computed tomography (micro-CT) imaging. We show that autofocus-corrected, theoretically-exact ...
Sumpf Tilman J - - 2011
To develop a model-based reconstruction technique for T2 mapping based on multi-echo spin-echo MRI sequences with highly undersampled Cartesian data encoding. The proposed technique relies on a nonlinear inverse reconstruction algorithm which directly estimates a T2 and spin-density map from a train of undersampled spin echoes. The method is applicable ...
Laurent Cédric P - - 2011
This study presents a new method for the 3D reconstruction of the human cranial vault from routine Computed Tomography (CT) data. The reconstruction method was based on the conceptualization of the shape of the cranial vault with a parametric description. An initialization was first realized with the identification of anatomical ...
Nakamura Shinichi - - 2011
Lanthanum carbonate (LC) is used to treat hyperphosphatemia. The purpose of this study was to investigate the signal intensity (SI) of LC on magnetic resonance imaging (MRI) scans of phantoms. LC tablets were thoroughly ground and mixed with distilled water or edible agar (0.05, 0.25, 0.5, and 2.5 mg/ml) in ...
Nagamoto Yukitaka - - 2011
STUDY DESIGN.: Kinematics of the cervical spine during head rotation was investigated using 3-dimensional (3D) magnetic resonance imaging (MRI) in patients with cervical spondylosis (CS). OBJECTIVE.: To demonstrate in vivo 3D kinematics of the spondylotic cervical spine during head rotation. SUMMARY OF BACKGROUND DATA.: Several in vivo studies have identified ...
Hecht Andrew C - - 2011
Symptomatic multilevel cervical myelopathy is often addressed using posterior decompression using two-dimensional fluoroscopy. Intraoperative three-dimensional fluoroscopy provides more accurate information on the position of instrumentation to prevent screw-related complications. We documented the incidence of hardware-related complications and evaluate cost-effectiveness when using intraoperative three-dimensional fluoroscopy (ISO-C CT) in posterior cervical spine ...
Morisaki Shinsuke - - 2011
PURPOSE: To evaluate the sensitivity of diffusion tensor imaging (DTI) in assessing peripheral nerve regeneration in vivo. We assessed the changes in the DTI parameters and histological analyses after nerve injury to examine degeneration and regeneration in the rat sciatic nerves. MATERIALS AND METHODS: For magnetic resonance imaging (MRI), 16 ...
Dunham C Michael - - 2011
Cervical spine (CS) magnetic resonance imaging (MRI) and collar use may prevent quadriplegia, yet create brain injury. We developed a computer model to assess the effect of CS management strategies on outcomes in comatose, blunt trauma patients with extremity movement and a negative CS CT scan. Strategies include early collar ...
Guo Jiqiang - - 2011
Traditional helical cone-beam Computed Tomography (CT) is based on the assumption that the entire cross-section of the scanned object is covered by x-rays at each view angle. Because of the size limitation of planar detector, the traditional helical cone-beam CT scanning is restricted when the cross-section of the object is ...
Dechaumphai Edward - - 2011
We report the fabrication of gold/polycarbonate (Au/PC) hybrid nano resonators on plastic substrates through a nano-transfer printing (nTP) technique, and the parametric studies of the resonant frequency of the resulting hybrid nano resonators. nTP is a nanofabrication technique that involves an assembly process by which a printable layer can be ...
Naganawa Toshitaka - - 2011
Comparison of magnetic resonance imaging (MRI) and computed tomography-myelography (CTM) for cervical intracanalar dimensions. To compare the capability and reproducibility of MRI and CTM in measuring the cross-sectional morphology of intracanalar lesions of the cervical spine. The relative advantages and disadvantages of MRI and CTM in measuring cervical intracanalar dimensions ...
Kim Daehyun - - 2011
Compressive sensing (CS) describes how sparse signals can be accurately reconstructed from many fewer samples than required by the Nyquist criterion. Since MRI scan duration is proportional to the number of acquired samples, CS has been gaining significant attention in MRI. However, the computationally intensive nature of CS reconstructions has ...
Merlet Sylvain - - 2011
We evaluate the impact of radial and angular sampling on multiple shells (MS) acquisition in diffusion MRI. The validation of our results is based on a new and efficient method to accurately reconstruct the Ensemble Average Propagator (EAP) in term of the Spherical Polar Fourier (SPF) basis from very few ...
Dennler Matthias - - 2011
To characterize the computed tomography (CT) features of thoracic lesions caused by infection with Angiostrongylus vasorum, pre- and postcontrast CT was performed in six experimentally infected Beagles 13 weeks postinoculation and in four of these 9 weeks postchemotherapy. Findings were compared with survey radiographs and necropsy findings. A multicentric bronchoalveolar ...
Agarwal Nivedita - - 2010
  Altered metabolism of membrane phospholipids has been implicated in bipolar disorder. In humans, uridine is an important precursor of cytidine diphosphate (CDP)-choline, which plays a critical role in phospholipid synthesis and is currently being evaluated as a potential treatment for bipolar depression.   A total of 17 healthy males ...
Balleyguier Corinne - - 2011
Objective: To design clear guidelines for the staging and follow-up of patients with uterine cervical cancer, and to provide the radiologist with a framework for use in multidisciplinary conferences. Methods: Guidelines for uterine cervical cancer staging and follow-up were defined by the female imaging subcommittee of the ESUR (European Society ...
Takasaki Hiroshi - - 2011
The Flexion-Rotation Test (FRT) is proposed to assess mobility primarily at C1-C2. However, there is no in vivo measurement investigating the validity of the FRT. The purpose of this study was 1) to examine measurement reliability of segmental upper cervical movements using magnetic resonance imaging and 2) to investigate the ...
Ramirez Pedro T - - 2010
To evaluate the utility of preoperative magnetic resonance imaging (MRI) in determining whether primary disease site is cervical or endometrial in patients with inconclusive preoperative endometrial biopsy. We retrospectively identified all patients who underwent pelvic MRI and who had a preoperative diagnosis of cervical or endometrial cancer at MD Anderson ...
Bhosale Priya - - 2010
Magnetic resonance imaging depicts the morphological details of the female pelvis and is useful for evaluating both benign and malignant cervical masses. Clinical assessment of the extent of cervical cancer is crucial in determining the optimal treatment strategy, but clinical staging by itself has limitations. Clinical staging, as defined by ...
Paik Nam Chull - - 2010
Cervical spondylolysis, which is defined as a cleft between the superior and inferior articular facets of the articular pillar, is a rare condition. The sixth cervical vertebra (C6) is the level most commonly affected. Cases involving C2, C3, C4, or C5 have also been reported. However, to date, no case ...
Moses Vinu - - 2010
Intraoperative ultrasound (IOUS) has been described to be useful during central corpectomy for compressive cervical myelopathy. This study aimed at documenting the utility of IOUS in oblique cervical corpectomy (OCC). Prospective data from 24 patients undergoing OCC for cervical spondylotic myelopathy and ossified posterior longitudinal ligament (OPLL) were collected. Patients ...
Sahdev Anju - - 2010
Imaging the cervix for benign and malignant disease can be achieved using transvaginal ultrasound, computed tomography (CT), magnetic resonance imaging, and 18-fluorodeoxyglucose positron emission tomography. The best established role of imaging is in cervical carcinoma where magnetic resonance imaging, CT and increasingly positron emission tomography-CT are the most frequently used ...
Kim Chung Reen - - 2010
OBJECTIVE: To determine relationships between increased signal intensity (ISI) on T2-weighted cervical spine magnetic resonance imaging (MRI) and parameters of gait analysis in patients with cervical spondylotic myelopathy (CSM). DESIGN: Retrospective comparative study. SETTING: Gait analysis laboratory. PARTICIPANTS: Patients (N=36) who undertook cervical laminectomy or laminoplasty because of CSM. INTERVENTIONS: ...
Hoang Jenny K - - 2010
CT fluoroscopy-assisted cervical transforaminal steroid injection is an effective therapeutic option for cervical radiculopathy, yet it is approached with trepidation by some interventionalists. CT fluoroscopy is superior to conventional fluoroscopy for delineating complex anatomic relations in the neck but must be combined with careful technique to avoid rare but serious ...
Tam Samantha - - 2010
Spinal cord compression may induce cortical reorganization. This study follows a patient with cervical spondylotic myelopathy to investigate changes in cortical activation before and after decompressive surgery. The relationship with functional recovery is also described. A 37-year-old right-hand-dominant man presented a 1-month history of rapidly worsening right-hand clumsiness, right-sided hemiparesis, ...
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