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NEUROSONOLOGY AND CEREBRAL HEMODYNAMICS
Official Journal of the Bulgarian Society of Neurosonology and Cerebral Hemodynamics
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Search Results for “search_doc_txt.php” – NEUROSONOLOGY AND CEREBRAL HEMODYNAMICS
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MRT
'.
1.
NEUROSONOLOGY AND CEREBRAL HEMODYNAMICS, vol. 2, 2006, No. 1
,
,
,
T2 and FLAIR positions of the
MRT
reveated medial temporal sclerosis bilaterally, more pronounced at right.
The beginning was in the early infant age, and at first the seizures have been partial at right. With the age they became generalized, and sometimes complex seizures have been observed by relatives. The neurological examination proved only a latent right-sided hemiparesis. There were focal signs as picks on the left site trace in a former EEG, and in the last one-slow-wave activity was presented. CT did not shure findings.
T2 and FLAIR positions of the MRT reveated medial temporal sclerosis bilaterally, more pronounced at right.
In IR local bilateral temporal atrophy was demonstrated, more pronounced at the left side. The medication during the last two years consisted of Tegretol 3x200 mg/d and Antelepsin 2x 0.5 mg/d. In the past other AEM have been tried, even in double combination. The level of Tegretol in the blood at the end of the last month before the procedures was 6.81 mg/l (referent values 4-12 mg/l).
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MRT
изследване от 02.11.2005 г.
MRT изследване от 02.11.2005 г.
Супратенториално на коронарните Т2 FLAIR образи в ляво в областта на хипокампус и гирус парахипокампалис се изобразява зона с повишен сигнален интензитет с неправилна форма. Подобна зона, но с по-високостепенно повишен интензитет се вижда и в десния хипокампус. На коронарните и IR образи се демонстрира мозъчна атрофия на целия ляв темпорален дял. Локална атрофия около темпоралния рог на десния вентрикул.
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2.
NEUROSONOLOGY AND CEREBRAL HEMODYNAMICS, vol. 5, 2009, No. 1
,
,
,
ller-Hartmann. Cerebral perfusion sonography in comparison with perfusion
MRT
: a study with healthy volunteers.
ller-Hartmann. Cerebral perfusion sonography in comparison with perfusion MRT: a study with healthy volunteers.
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Twenty three patients (21 men and 2 women, mean age 52.8 years) with clinical and CT/
MRT
evidence for vascular lesion of the retrochiasmal visual pathways have been examined.
Twenty three patients (21 men and 2 women, mean age 52.8 years) with clinical and CT/MRT evidence for vascular lesion of the retrochiasmal visual pathways have been examined.
The visual field defect was objectified by computed static perimeter Dicon TKS 5000. Two programs have been used – N 11 (“full field”) for the whole visual field and N 9 (“central grid”) for the central 30
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3.
NEUROSONOLOGY AND CEREBRAL HEMODYNAMICS, vol. 6, 2010, No. 2
,
,
,
Comparison between preoperative
MRT
(T2) and intraoperative neurosonography in extramedular neurinoma with cyst degeneration (Antony type B hystological variant)
Comparison between preoperative MRT (T2) and intraoperative neurosonography in extramedular neurinoma with cyst degeneration (Antony type B hystological variant)
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Comparison between
MRT
(T1) and ultrasound images of extramedular neurinoma (Verocai hystological type).
Comparison between MRT (T1) and ultrasound images of extramedular neurinoma (Verocai hystological type).
The tumor is hyperintensive on T1
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Calcium deposits in meningiomas are equally visible on inraoperative ultrasound and T1 images in
MRT
.
There is a distinct correlation between preoperative MRI images and intraoperative neurosonography of macrocysts in ependimomas. Microcysts are visible only on neurosonography. There is a better visualization of neurinoma microcyst when we use intraoperative ultrasound.
Calcium deposits in meningiomas are equally visible on inraoperative ultrasound and T1 images in MRT.
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basal ganglia, brain,
MRT
, thalamus
basal ganglia, brain, MRT, thalamus
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Several diseases may cause non specific
MRT
abnormalities of the bilateral basal ganglia and thalami.
Several diseases may cause non specific MRT abnormalities of the bilateral basal ganglia and thalami.
Etiological diagnosis based on brain imaging may be difficult. This review summarises diagnostic values of brain MRI and clinical data in different diseases causing bilateral basal ganglia and thalami MRI lesions: toxic, metabolic, vascular, infectious, inflammatory diseases and tumors.
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4.
NEUROSONOLOGY AND CEREBRAL HEMODYNAMICS, vol. 11, 2015, No. 2
,
,
,
The control
MRT
/MRA studies performed 6 months after the onset of the disease, established normal brain parenchyma, intracranial vascular system, orbits and retrobulbar spaces.
Head CT showed a pseudotumor formation in the left medial retrobulbar space with slight swelling of the left optic nerve. Four months later the local neuro-ophthalmic status established mild left exophthalmos, ptosis of the left eyelid, conjunctival hyporeflexia of the left eye and hyposmia associated with CT data for left ethmoid sinusitis. There were found periods of accelerated erythrocyte sedimentation rate (ESR), normalized after treatment with corticosteroids. Thyroid hormones and tumor markers (carcinoembryonic antigen and prostate specific antigen) were within reference ranges. The multimodal ultrasound neuroimaging showed left optic disc drusen, slightly increased diameters of the left optic nerve/sheath complex and thickened intima-media of the left internal carotid artery.
The control MRT/MRA studies performed 6 months after the onset of the disease, established normal brain parenchyma, intracranial vascular system, orbits and retrobulbar spaces.
The diagnosis of Tolosa-Hunt syndrome was based on the criteria of the Intrenational Headache Society.
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5.
NEUROSONOLOGY AND CEREBRAL HEMODYNAMICS, vol. 12, 2016, No. 1
,
,
,
The brain parenchyma is evaluated with magnetic resonance tomography (
MRT
) and tractography.
For the aim of the study, the patient underwent clinical, neurological and neuropsychological studies, EEG, visual and auditory evoked potential tests.
The brain parenchyma is evaluated with magnetic resonance tomography (MRT) and tractography.
The results of the neuroimaging studies of the patient’s brain are compared with those of a clinically healthy male of the same age. In order to find additional anomalies an echocardiography, pharyngoscopy, audiometry and neuroophtalmic studies were made.
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The findings are in contrast with the normal anatomy of the brain, portrayed by the
MRT
of the healthy control (fig.
located next to their medial side. There is also an alteration in the modelling of the sphenoid bone – reduced volume of the dorsal part.
The findings are in contrast with the normal anatomy of the brain, portrayed by the MRT of the healthy control (fig.
1D, E, F).
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The diagnostic value of the method is restricted, therefore when there is suspicion, a prenatal
MRT
is advised [5, 11, 15].
eral ventricles (colpocephaly), the discovery of high positioned third ventricle and abnormal vertical direction of the medial cortical sulci [3, 20].
The diagnostic value of the method is restricted, therefore when there is suspicion, a prenatal MRT is advised [5, 11, 15].
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All degrees of malformation of the corpus callosum can be evaluated with
MRT
of the brain, as well as additional brain anomalies, both prenatally and postnatally [20].
All degrees of malformation of the corpus callosum can be evaluated with MRT of the brain, as well as additional brain anomalies, both prenatally and postnatally [20].
Corpus callosum contributes to the forming of the contour and the size of the brain ventricles and that is the reason why, when anomalies in the development of the corpus callosum are present, specific changes in the structure, size and location of the ventricles are found. Heterotopically positioned callosal fibers, instead of crossing the midline, are oriented vertically and in that way they cause the parallel orientation of the lateral ventricles and the dilatation of their temporal and occipital horns – colpocephaly [18, 20]. These changes form the magnetic resonance image, which in axial view is described as “racing car sign”, due to the close resemblance of a race car. In the coronary view, the image resembles the helmet of a Viking or horns, made by the frontal horns of the lateral ventricles and therefore is called “steer – horn sign” or “Viking helmet” [12, 13]. The third ventricle may be abnormally dilated and moved cranio-dorsally, giving the image of a cyst, as well as it may communicate with the interhemispheric cistern.
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The control
MRT
/MRA studies performed 6 months after the onset of the disease, established normal brain parenchyma, intracranial vascular system, orbits and retrobulbar spaces.
Head CT showed a pseudotumor formation in the left medial retrobulbar space with slight swelling of the left optic nerve. Four months later the local neuro-ophthalmic status established mild left exophthalmos, ptosis of the left eyelid, conjunctival hyporeflexia of the left eye and hyposmia associated with CT data for left ethmoid sinusitis. There were found periods of accelerated erythrocyte sedimentation rate (ESR), normalized after treatment with corticosteroids. Thyroid hormones and tumor markers (carcinoembryonic antigen and prostate specific antigen) were within reference ranges. The multimodal ultrasound neuroimaging showed left optic disc drusen, slightly increased diameters of the left optic nerve/sheath complex and thickened intima-media of the left internal carotid artery.
The control MRT/MRA studies performed 6 months after the onset of the disease, established normal brain parenchyma, intracranial vascular system, orbits and retrobulbar spaces.
The diagnosis of Tolosa-Hunt syndrome was based on the criteria of the Intrenational Hedache Society.
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6.
NEUROSONOLOGY AND CEREBRAL HEMODYNAMICS, vol. 13, 2017, No. 1
,
,
,
41 patients with severe stenosis and 30 patients with occlusion of ICA underwent brain
MRT
, 3D TOF-MR-angiography, Color Doppler of extraand intracranial vessels to investigate collateral flow via the circle of Willis and via the ophthalmic artery (OphA).
41 patients with severe stenosis and 30 patients with occlusion of ICA underwent brain MRT, 3D TOF-MR-angiography, Color Doppler of extraand intracranial vessels to investigate collateral flow via the circle of Willis and via the ophthalmic artery (OphA).
Maps of the cerebral perfusion parameters were calculated.
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Изследвани са 41 пациенти с тежка стеноза и 30 пациенти с оклузия на ВСА чрез мозъчна
MRT
, 3D TOF-МР-ангиография и цветна доплерова сонография на екстраи интракраниалните съдове за прецизиране на колатералния кръвоток през Вилизиевия кръг и през офталмичната артерия (OA).
Изследвани са 41 пациенти с тежка стеноза и 30 пациенти с оклузия на ВСА чрез мозъчна MRT, 3D TOF-МР-ангиография и цветна доплерова сонография на екстраи интракраниалните съдове за прецизиране на колатералния кръвоток през Вилизиевия кръг и през офталмичната артерия (OA).
Изчислени са параметрите на мозъчна перфузия.
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All patients underwent a careful neurological and cardiological examination, ECG, transthoracic echocardiography, brain
MRT
, 3D TOF-MRangiography, Color Doppler of extraand intracranial vessels to investigate collateral flow via the circle of Willis: anterior communicating (AComA) and posterior communicating (PComA) arteries, and via the ophthalmic artery (OA).
All patients underwent a careful neurological and cardiological examination, ECG, transthoracic echocardiography, brain MRT, 3D TOF-MRangiography, Color Doppler of extraand intracranial vessels to investigate collateral flow via the circle of Willis: anterior communicating (AComA) and posterior communicating (PComA) arteries, and via the ophthalmic artery (OA).
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As seen on Table 1, in asymptomatic patients
MRT
revealed only 2 cases of socalled “silent” infarctions; one in the MCA supply area, onePCA supply area.
As seen on Table 1, in asymptomatic patients MRT revealed only 2 cases of socalled “silent” infarctions; one in the MCA supply area, onePCA supply area.
In this group prevalence of lacunar infarctions: 8 patients (38%) and subcortical
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In symptomatic (n=50) patients
MRT
found prevalence of cortical or cortical\subcortical infarctions of the MCA supply area: 13 (26%), and 10 (20%) cases of border-zone infarctions,
leukoencephalopathy: 6 patients (29%) was noted.
In symptomatic (n=50) patients MRT found prevalence of cortical or cortical\subcortical infarctions of the MCA supply area: 13 (26%), and 10 (20%) cases of border-zone infarctions,
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7.
NEUROSONOLOGY AND CEREBRAL HEMODYNAMICS, vol. 14, 2018, No. 2
,
,
,
A small hypointense zone in the left subcortical area was seen on
MRT
.
month after the onset of symptoms, confirmed with MRA.
A small hypointense zone in the left subcortical area was seen on MRT.
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8.
NEUROSONOLOGY AND CEREBRAL HEMODYNAMICS, vol. 15, 2019, No. 1
,
,
,
The patient is referred for
MRT
of the carotid arteries in order to make a detailed characterization of vascular wall changes.
The patient is referred for MRT of the carotid arteries in order to make a detailed characterization of vascular wall changes.
The examination is performed on 1.5T machine (Avanto, Siemens Erlangen). A standard protocol for evaluation of carotid vessels is used which includes high resolution morphological T1, T2, PD images with fat and flowing blood signal suppression ("double inversion" images), non-contrast MR angiography of cervical and intracranial arterial vessels (TOF), dynamic contrast enhanced MR angiography (TWIST) and late post-contrast T1 images.
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MRT
provides coverage of a larger volume within one examination without ionizing
The assessment accuracy of the grade of stenotic lesions reaches 98% when the latter technique is used. The application of contrast allows seeing enhancement in the vascular wall, which is a sign of active inflammation [1]. Highresolution morphological images give information about the thickness of the vascular wall and the type of changes: edema, hemorrhages, thrombi, and calcifications. The individual layers of the wall are clearly distinguishable; it is also possible to localize the different types of changes. Our case demonstrates the whole spectrum of changes in Takayasu disease: intimal edema, inflammation, hemorrhages and fibrosis in the media and adventitia, and wall thrombosis in the lumen of the aneurysms.
MRT provides coverage of a larger volume within one examination without ionizing
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MRT
has a clear advantage because of the multiparameter contrast and the lack of ionizing radiation, which allows a detailed characterization of the vascular wall and the acquisition of dynamic angiographic image of large vascular segments within a single study.
Computed and magnetic resonance tomography are non-invasive methods that allow assessing the changes in the vascular wall and the lumen of the vessel in cases of TA.
MRT has a clear advantage because of the multiparameter contrast and the lack of ionizing radiation, which allows a detailed characterization of the vascular wall and the acquisition of dynamic angiographic image of large vascular segments within a single study.
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