Search Results
Results 301 - 350 of 1533
< 2 3 4 5 6 7 8 9 10 11 12 >
Rodríguez Jaime - - 2008
BACKGROUND AND OBJECTIVES: Imaging studies in humans have shown that intraneural injection of local anesthetic may be relatively frequent. The incidence of intraneural catheterization is unknown. We speculated that early neural blockade after the injection of a small dose of local anesthetic might be a common finding produced by unintended ...
Scheller Christian - - 2008
The intermediate nerve is seldom identified as the site of tumor origin in cerebellopontine angle schwannomas. A 29-year-old man presented with a 6-month history of slowly progressive hearing loss and dizziness; facial nerve weakness was not observed clinically. Magnetic resonance imaging revealed a tumor in the left cerebellopontine angle region ...
Bahmani Kashkouli Mohsen - - 2008
A 40-year-old man presented with a sudden severe headache and complete right-sided ptosis. Neuro-ophthalmic examination revealed a right oculomotor nerve palsy. Computed tomography of the brain showed a round isodense intrasellar mass. Magnetic resonance imaging demonstrated a pituitary tumor with some areas of infarction and invasion into the right cavernous ...
Merlini Laura - - 2008
Perineuroma, rare in children, presents as a painless mononeuropathy of a major nerve trunk. Resection of the lesion with end-to-end sural nerve grafting appears to be the treatment of choice. This technique is not recommended if the unhealthy segment of nerve is too long or if spinal roots are involved. ...
Adachi M - - 2008
A 36-year-old woman presented with glossopharyngeal and vagus nerve palsy, which proved to be herpes zoster based on the high titers of Varicella zoster virus antibody in her serum. Thin-section T1-weighted images with contrast media demonstrated swelling and distinct contrast enhancement of the glossopharyngeal and vagus complex, mimicking a tumor. ...
Mori Shintaro - - 2008
OBJECTIVE: The inferior alveolar nerve is the third branch (V3) of the trigeminal nerve and one of the important nerves in dental treatment clinically. In particular, in the assessment of nerve invasion by malignant tumors of jaw bone, diagnostic imaging of the inferior alveolar nerve is essential. The purpose of ...
Peter L M - - 2008
We report a patient with scleromyxoedema and peripheral neuropathy treated successfully with thalidomide. An objective evaluation was carried out using histopathology, cutaneous ultrasonography and magnetic resonance imaging (MRI). A 67-year-old woman presented with a leonine face, generalized thickened skin, an underlying peripheral neuropathy and a monoclonal gammopathy. She was treated ...
Koczman Jacob J - - 2008
PURPOSE: To report a case series of neuro-ophthalmic sarcoidosis manifestations from a predominantly Caucasian Midwest population. DESIGN: Retrospective non-comparative case series and literature review. PARTICIPANTS: Twenty patients with biopsy proven sarcoidosis cases and neuro-ophthalmic manifestations. METHODS: We reviewed 67 consecutive charts with the clinical diagnosis of neurosarcoidosis at the University ...
Veillon F - - 2008
A good examination in facial nerve imaging (CT or MR imaging) depends on a good knowledge of anatomy. Two clinical situations must be considered: imaging of patients with or without facial palsy. CT and MR imaging are very useful when the symptoms are atypical or progressive: MR imaging gives very ...
Mitchell John P - - 2008
Lateral rectus muscle (LRM) palsy due to a nuclear or fascicular sixth nerve lesion is rare as the presenting sign of multiple sclerosis (MS). It is more common to find this palsy in the company of other nearby cranial nerves deficits. Facial numbness in association with a LRM palsy or ...
Casselman Jan - - 2008
Magnetic resonance (MR) imaging is the method of choice to evaluate the cranial nerves. Although the skull base foramina can be seen on CT, the nerves themselves can only be visualized in detail on MR. To see the different segments of nerves I to XII, the right sequences must be ...
Little Andrew S - - 2008
OBJECTIVE: A two-stage approach using orbitozygomatic (OZ) and retrosigmoid (RS) craniotomies is one option for the management of petroclival lesions with supratentorial extension. The goal of this study was to investigate the supratentorial and infratentorial exposures of the clivus obtained through this staged approach. METHODS: Formalin-fixed, silicon-injected specimens underwent stereotactic ...
Becker Minerva - - 2008
Imaging of the trigeminal nerve requires a thorough understanding of its anatomy and function, clinical symptoms related to malfunction, and its key pathologies. Because of the nerve's long course from the brainstem nuclei to the peripheral branches, MR imaging and CT studies have to cover a large anatomic area while ...
Swartz Joel D - - 2008
Imaging of the vestibulocochlear nerve has evolved dramatically over the past few decades. The imaging specialist now is involved in the diagnosis of far more diagnostic entities than ever before. With this increased involvement comes the responsibility to increase collective knowledge regarding the pathophysiology of these diagnostic entities. This article ...
Miller Jonathan P - - 2008
OBJECTIVE: Trigeminal neuralgia (TN) is often associated with neurovascular compression. However, intracranial tumors are occasionally observed, particularly when symptoms are atypical. We describe three patients with Type-1 TN and trigeminal schwannoma diagnosed by magnetic resonance imaging, with concomitant arterial compression of the trigeminal nerve. CLINICAL PRESENTATION: All three patients had ...
Fischbach F - - 2008
BACKGROUND: High-field magnetic resonance imaging (MRI) at 3.0 Tesla (T) is rapidly gaining clinical acceptance. Whether doubling of the field strength of 1.5T and the subsequent increase in signal-to-noise ratio (SNR) leads to a significant improvement of image quality is not automatically given. PURPOSE: To evaluate the depiction of fine ...
Andreisek Gustav - - 2008
To investigate the role of MR imaging (MRI) in the evaluation of peripheral nerve lesions of the upper extremities and to assess its impact on the patient management. Fifty-one patients with clinical evidence of radial, median, and/or ulnar nerve lesions and unclear or ambiguous clinical findings had MRI of the ...
Yamabe Eiko - - 2008
PURPOSE: To prospectively evaluate signal intensity change on T2-weighted magnetic resonance (MR) images and the time course of T2 values and T2 ratios after reinnervation in various nerve injury models in rats. MATERIALS AND METHODS: Institutional animal use and care committee approval was obtained. Thirty male rats made up four ...
Chen Celia S - - 2008
Nonarteritic anterior ischemic optic neuropathy (NAION) is an optic nerve (ON) stroke and a leading cause of sudden ON-related vision loss. A primate (p)NAION model is crucial to further understanding of the clinical disorder and can provide information regarding the pathophysiology of other central nervous system (CNS) ischemic axonopathies. In ...
Karol Eduardo A - - 2009
BACKGROUND: We describe our method and mapping technique of the trigeminal nerve using a quadripolar electrode to minimize morbidity of percutaneous thermocoagulation as treatment of trigeminal neuralgia. METHOD: Of 381 patients selected for postgasserian thermocoagulation, 178 consecutive procedures were carried out using, in most cases, our painless and ambulatory method ...
Righini Andrea - - 2008
OBJECTIVE: Congenital optic nerve head coloboma represents an important cause of childhood visual impairment and blindness; it can be isolated or, more often, it can be associated with several syndromes. Ultrasound has limitations in depicting the posterior aspect of the fetal eye globe, so prenatal information about ocular coloboma are ...
Zhang Zhongwei - - 2008
PURPOSE: To depict the normal anatomy of cranial nerves in detail and define the exact relationships between cranial nerves and adjacent structures with three-dimensional reversed fast imaging with steady-state precession (FISP) (3D-PSIF) with diffusion-weighted MR sequence. MATERIALS AND METHODS: 3D-PSIF with diffusion-weighted MR sequence was performed and axial images were ...
Boretius Susann - - 2008
Neuritis of the optic nerve is one of the most frequent early symptoms of multiple sclerosis. There are only scarce data correlating magnetic resonance imaging (MRI) contrast alterations with the underlying pathology, that is inflammation, demyelination, and axonal damage. Here we studied optic neuritis in a rat model of experimental ...
Watanabe A - - 2008
The subarachnoid space around the optic nerve can be detected by fat-saturated T2-weighted MR imaging of the orbit, and dilation of this space reflects increased intracranial pressure. We examined 3 patients with CSF hypovolemia with MR imaging of the orbit and measured the optic nerve sheath diameter before and after ...
Lorenzoni Josè G - - 2008
OBJECTIVE: To study the influence of the anatomy of neurovascular compression (NVC) on pain outcome in patients with classic trigeminal neuralgia treated by radiosurgery. METHODS: Analysis of the anatomy of the trigeminal nerve, brainstem, and vessels was performed in 89 consecutive patients treated by Leksell gamma knife (Elekta Instruments, Stockholm, ...
Majdani Omid - - 2008
OBJECTIVE: High-precision intraoperative navigation using high-resolution flat-panel volume computed tomography makes feasible the possibility of minimally invasive cochlear implant surgery, including cochleostomy. Conventional cochlear implant surgery is typically performed via mastoidectomy with facial recess to identify and avoid damage to vital anatomic landmarks. To accomplish this procedure via a minimally ...
Weiss Jennifer M - - 2008
We report a rare case of femoral nerve palsy secondary to hematoma compression of the iliacus. The patient presented with pain 2 days after performing a double kick in karate. The femoral nerve symptoms (numbness and weakness) did not begin until 3 to 4 days after the initial trauma. Magnetic ...
Chung Soon-Cheol - - 2008
The purpose of the present study was to develop a magnetic resonance (MR) compatible photoplethysmograph (PPG) system that can measure the raw PPG signal during MR image acquisition. The system consists of an optic sensor that measures the optic signal, an optic cable that transmits a near-infrared optic signal, a ...
Gomes Ana Cláudia Amorim - - 2008
PURPOSE: The purpose of the study was to assess the sensitivity and specificity of maxillary radiographic image findings in predicting nerve lesions in third molar surgery. PATIENTS AND METHODS: A total of 260 third molars were assessed prior to surgical removal by means of panoramic radiography in the sample of ...
Medeiros Felipe A - - 2008
To compare retinal nerve fiber layer (RNFL) and optic disc topographic imaging for detection of optic nerve damage in patients suspected of having glaucoma. Observational cohort study. A cohort of 82 patients suspected of having glaucoma based on the appearance of the optic nerve. All patients were imaged using the ...
Hwang Jeong-Min - - 2008
BACKGROUND: Optic gliomas may unpredictably stabilize or progress. Prognosis was known to be better in patients with neurofibromatosis 1 (NF1) than those with non-NF1. The confusion over management is caused, at least in part, by the uncertain disease course of the tumor. CASE HISTORY: We report here a 13-year-old girl ...
Lim S A - - 2008
Acute visual loss can be caused by retrobulbar optic neuritis, radiation optic neuropathy or ischaemic optic neuropathy. Sinusitis affecting the Onodi cell, a posterior ethmoidal air cell that has encroached on the adjacent sphenoid bone forming the optic canal, can present rarely with visual loss. We report a 60-year-old man, ...
Ni Yusu - - 2008
OBJECTIVE: To investigate an effective method of quantitative analysis of the facial nerve and its adjacent structures on the basis of three-dimensional (3D) CT image reconstruction of the temporal bone. METHODS: The inner structures of the temporal bone from CT images of 34 healthy adults were reconstructed. Precise measurement of ...
Grant P Ellen - - 2008
Recent advances in radiographic imaging technology allow for therapeutic agents to be placed within the subepineurium of peripheral nerve tissue. Adriamycin, a chemotherapeutic agent, is retrogradely transported by nerves to their cell bodies residing in the dorsal root ganglia. The combined process of radiological approach, an understanding of the anatomy ...
Régis Jean - - 2008
RATIONALE: From frame placement to dose administration, each step of the procedure must be optimized in every detail for better preservation of global precision, accuracy, safety and efficacy. METHODS: Quality control for resolution, accuracy and acquisition parameter optimization of both computed tomography (CT) scanners and magnetic resonance imaging (MRI) must ...
Kimberly Heidi Harbison - - 2008
The current gold standard for the diagnosis of elevated intracranial pressure (ICP) remains invasive monitoring. Given that invasive monitoring is not always available or clinically feasible, there is growing interest in non-invasive methods of assessing ICP using diagnostic modalities such as ultrasound or magnetic resonance imaging (MRI). Increased ICP is ...
Strauss Mario - - 2008
While removing bone tissue of the mastoid, the facial nerve is at risk of being injured. In this contribution a model for nerve visualization in preoperative image data based on intraoperatively gained EMG signals is proposed. A neuro monitor can assist the surgeon locating and preserving the nerve. With the ...
Yu Zilong - - 2008
CONCLUSIONS: The facial nerve courses shown by preoperative CT imaging coincide with the surgical findings in most congenital aural atresia cases. CT scanning is critical in evaluation of a patient's candidacy for atresia surgery. OBJECTIVES: To evaluate the diagnostic value of preoperative CT scanning of the facial nerve course in ...
Jacovella Patricio F - - 2008
Radiesse (Bioform Inc, USA) is a sterile, latex-free, non-pyrogenic, semi-solid, cohesive subdermal, injectable implant, whose principal component is synthetic calcium hydroxylapatite, a biocompatible material with over 20 years of use in medicine. The semi-solid nature of the product is created by suspending calcium hydroxylapatite microspheres of 25-45 microns diameter in ...
Geeraerts Thomas T University Division of Anaesthesia and Wolfson Brain Imaging Center, University of Cambridge, Addenbrooke's Hospital, Hills Road, Cambridge, CB2 2QQ, UK. - - 2008
The dural sheath surrounding the optic nerve communicates with the subarachnoid space, and distends when intracranial pressure is elevated. Magnetic resonance imaging (MRI) is often performed in patients at risk for raised intracranial pressure (ICP) and can be used to measure precisely the diameter of optic nerve and its sheath. ...
Kim In Sup - - 2007
PURPOSE: To investigate the correlation between gadolinium enhanced magnetic resonance image (MRI) results and surgical findings of facial nerves in Bell's palsy and Ramsay Hunt syndrome. MATERIALS AND METHODS: From 1995 to 2004, MRI was performed on 13 patients with Bell's palsy or Ramsay Hunt syndrome, who were offered with ...
Gerevini Simonetta - - 2008
The imaging of the brachial plexus (BP) cannot easily be achieved because of the extension of the region to be studied, the different tissue compositions of the adjacent anatomic structures and the necessity to work with thin tissue slices. Here is a description of the brachial plexus MRI (bpMRI) protocol ...
Paladin Angelisa M - - 2008
A 4-year-old boy presented with moderate to profound mixed hearing loss in the right ear and moderate to severe mixed hearing loss in the left ear, prompting a temporal bone CT scan. Images revealed partial dehiscence of the right posterior semicircular canal. Semicircular canal dehiscence and its associated clinical syndrome ...
Davagnanam I - - 2008
Conventional imaging protocols are unable to visualize the intraforaminal/canalicular segments of the lower cranial nerves (IX-XII). On the basis of previous successful demonstration of individual cranial nerves within the cavernous sinus by constructive interference in steady-state MR imaging, we describe the use of contrast-enhanced 3D fast imaging employing steady-state acquisition ...
Sakas Damianos E - - 2007
The authors present the case of a 52-year-old female patient with a 6-year history of intractable paroxysmal otalgia. Preoperative magnetic resonance (MR) angiography demonstrated an anterior inferior cerebellar artery loop compressing the intermediate nerve in the seventh/eighth cranial nerve complex inside the internal auditory canal. The pain resolved completely after ...
Mallur Pavan S - - 2007
OBJECTIVE: To highlight diagnostic and management features of auditory neuropathy/auditory dyssynchrony (AN/DS) due to central demyelinating disorder. PATIENTS: A child with AN/DS due to central nervous system pathologic findings. INTERVENTIONS: Audiometry, auditory brainstem response (ABR) test, otoacoustic emission test, magnetic resonance imaging (MRI) with gadolinium contrast, intravenous corticosteroid treatment, antiviral ...
De Ridder Dirk - - 2007
Isolated abducent palsy is a symptom that can be caused by many different intracranial pathological conditions. In this report the authors describe the case of a patient who suffered isolated abducent palsy resulting from vascular compression of the sixth cranial nerve; surgical treatment consisted of microvascular decompression (MVD). This 56-year-old ...
Lian Hui-Cheng - - 2007
In this paper, we present a novel method for multi-view gender classification considering both shape and texture information to represent facial images. The face area is divided into small regions from which local binary pattern (LBP) histograms are extracted and concatenated into a single vector efficiently representing a facial image. ...
Chen Jern Yee - - 2007
Idiopathic intracranial hypertension can cause severe optic nerve damage with irreversible visual loss. Heidelberg retina tomography is a sensitive and reproducible tool that can be used in the monitoring of optic disc swelling due to IIH. We demonstrate that the three-dimensional images produced are easy to interpret, indicate progression or ...
Kayaoglu Cetin R - - 2007
Multiple schwannomas in the absence of neurofibromatosis is rarely reported in the literature. We present a 56-year-old female with a history of severe leg and back pain on the left side for one year. Magnetic resonance imaging revealed 4 schwannomas located in the cauda equina in the absence of von ...
< 2 3 4 5 6 7 8 9 10 11 12 >