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1.
Investigative Magnetic Resonance Imaging ; : 193-196, 2021.
Article Dans Anglais | WPRIM | ID: wpr-891150

Résumé

Congenital absence of the bilateral internal carotid arteries (ICA) is a very rare occurrence. Recognition of this rare anomaly is important, when considering intracranial endovascular interventions in the event of thromboembolic events with revascularization, transsphenoidal surgery, and the surveillance and detection of associated cerebral aneurysms. We report a case of a 25-year-old man who presented with headache since 2 years ago, and was incidentally discovered to have a congenital bilateral absence of ICAs.

2.
Investigative Magnetic Resonance Imaging ; : 193-196, 2021.
Article Dans Anglais | WPRIM | ID: wpr-898854

Résumé

Congenital absence of the bilateral internal carotid arteries (ICA) is a very rare occurrence. Recognition of this rare anomaly is important, when considering intracranial endovascular interventions in the event of thromboembolic events with revascularization, transsphenoidal surgery, and the surveillance and detection of associated cerebral aneurysms. We report a case of a 25-year-old man who presented with headache since 2 years ago, and was incidentally discovered to have a congenital bilateral absence of ICAs.

4.
Investigative Magnetic Resonance Imaging ; : 71-74, 2016.
Article Dans Anglais | WPRIM | ID: wpr-223255

Résumé

Wernicke's encephalopathy (WE) is an acute neurological disorder resulting from thiamine deficiency. Early diagnosis and treatment of WE is important to avoid persistent brain damage. Although histopathologic examination usually demonstrates pin-point hemorrhages in affected brain parenchyma, secondary hemorrhage is a rare but serious complication of WE. We experienced a rare case of intracranial hemorrhage related to WE in a 56-year-old male patient with malnourishment.


Sujets)
Humains , Mâle , Adulte d'âge moyen , Encéphale , Diagnostic précoce , Hémorragie , Hémorragies intracrâniennes , Imagerie par résonance magnétique , Maladies du système nerveux , Carence en thiamine , Encéphalopathie de Gayet-Wernicke
5.
Journal of the Korean Society of Magnetic Resonance in Medicine ; : 290-302, 2014.
Article Dans Anglais | WPRIM | ID: wpr-77851

Résumé

PURPOSE: Susceptibility-weighted magnetic resonance (MR) sequence is three-dimensional (3D), spoiled gradient-echo pulse sequences that provide a high sensitivity for the detection of blood degradation products, calcifications, and iron deposits. This pictorial review is aimed at illustrating and discussing its main clinical applications. MATERIALS AND METHODS: SWI is based on high-resolution, 3D, fully velocity-compensated gradient-echo sequences using both magnitude and phase images. To enhance the visibility of the venous structures, the magnitude images are multiplied with a phase mask generated from the filtered phase data, which are displayed at best after post-processing of the 3D dataset with the minimal intensity projection algorithm. A total of 200 patients underwent MR examinations that included SWI on a 3 tesla MR imager were enrolled. RESULTS: SWI is very useful in detecting multiple brain disorders. Among the 200 patients, 80 showed developmental venous anomaly, 22 showed cavernous malformation, 12 showed calcifications in various conditions, 21 showed cerebrovascular accident with susceptibility vessel sign or microbleeds, 52 showed brain tumors, 2 showed diffuse axonal injury, 3 showed arteriovenous malformation, 5 showed dural arteriovenous fistula, 1 showed moyamoya disease, and 2 showed Parkinson's disease. CONCLUSION: SWI is useful in detecting occult low flow vascular lesions, calcification and microbleed and characterising diverse brain disorders.


Sujets)
Humains , Malformations artérioveineuses , Encéphale , Encéphalopathies , Tumeurs du cerveau , Malformations vasculaires du système nerveux central , Ensemble de données , Lésion axonale diffuse , Fer , Imagerie par résonance magnétique , Masques , Maladie de Moya-Moya , Neuroimagerie , Maladie de Parkinson , Accident vasculaire cérébral
6.
Korean Journal of Radiology ; : S30-S33, 2008.
Article Dans Anglais | WPRIM | ID: wpr-65665

Résumé

Cholesterol granuloma (CG) is usually associated with chronic middle ear disease, and is not common in the paranasal sinuses. Additionally, it is very rare for cases of CG to be associated with a fungal infection. However, in this paper, we report a case of sphenoid sinus CG that is associated with aspergilloma in a 78-year-old male patient who presented with right hemifacial pain, headache and toothache. CT revealed the presence of an expansile cystic mass lesion in the sphenoid sinus that showed a high signal intensity on both the T1 and T2 weighted images. This mass was later determined to be CG. The suspected etiologic mechanisms of both CG and aspergilloma of the paranasal sinuses are similar, and impaired drainage and obstruction of the ventilation of the paranasal sinuses are considered to be the causative mechanism of both diseases. Overall, the results of this study indicate that the use of MRI findings could be helpful for differentiating CG from other paranasal sinus mass lesions.


Sujets)
Sujet âgé , Humains , Mâle , Aspergillose/complications , Granulome/diagnostic , Imagerie par résonance magnétique , Maladies des sinus/complications , Sinus sphénoïdal , Tomodensitométrie
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