Search results for "neuroradiology"
showing 10 items of 231 documents
Intraoperative imaging findings in transcranial MR imaging-guided focused ultrasound treatment at 1.5T may accurately detect typical lesional finding…
2020
To assess the intraoperative neuroimaging findings in patients treated with transcranial MR-guided focused ultrasound (tcMRgFUS) thalamotomy using 1.5T equipment in comparison with the 48-h follow-up.Fifty prospectively enrolled patients undergoing unilateral tcMRgFUS thalamotomy for either medication-refractory essential tremor (n = 39) or Parkinson tremor (n = 11) were included. Two radiologists evaluated the presence and size of concentric lesional zones (zone I, zone II, and zone III) on 2D T2-weighted sequences acquired intraoperatively after the last high-energy sonication and at 48 h. Sonication parameters including number of sonications, delivered energy, and treatment temperatures …
Forty-slice MDCT enteroclysis: evaluation after oral administration of isotonic solution in Crohn's disease.
2007
Objective. The aim of this study was to evaluate the accuracy of multidetector computed tomography (MDCT) enteroclysis after oral hyperhydration with isotonic solution in detecting bowel wall alterations in patients with Crohn’s disease. Materials and methods. Twenty-eight patients with a diagnosis of Crohn’s disease established by ileocolonoscopy and histology were enrolled in the study; 15 patients with negative ileocolonoscopy served as controls. In all cases, MDCT enteroclysis was performed after oral administration of 2,000 ml of isotonic solution and intravenous administration of N-butylscopolamine. Axial, isotropic multiplanar and volume-rendered reconstructions were used to evaluate…
The internal auditory artery: (embryology, anatomy, angiography, pathology).
1975
A review of the literature on the embryology, anatomy and angiography of the internal auditory artery has shown that there may be considerable variation as to the origin and number of internal auditory arteries. The present study, based on serial magnification angiographies of the internal auditory artery, has demonstrated 7 variants of the origin of this artery although in 45.4% of cases the internal auditory artery arose from the anterior inferior cerebellar artery. For the diagnosis of pathological processes in the cerebellopontine angle (tumors, sudden deafness, vascular abnormalities) magnification angiography is of special importance. Acoustic neurinomas in particular can be diagnosed…
Bone age determination based on the study of the medial extremity of the clavicle
1998
The development of the medial clavicular epiphysis and its fusion with the clavicular shaft have been a subject of medical research since the second decade of this century. Computed tomography provides the imaging modality of choice in analyzing the maturation process of the sternal end of the clavicle. In a retrospective study, we analyzed normal development in 380 individuals under the age of 30 years. The appearance of an epiphyseal ossification center occurred between ages 11 and 22 years. Partial union was found from age 16 until age 26 years. Complete union was first noted at age 22 years and in 100 % of the sample at age 27 years. Based on these data, age-related standardized age dis…
Characterisation of indeterminate focal breast lesions on grey-scale ultrasound: role of ultrasound elastography.
2011
PURPOSE: This study was undertaken to evaluate the role of ultrasound (US) elastography in characterising focal breast lesions classified as indeterminate on B-mode US. MATERIALS AND METHODS: Eighty-four focal breast lesions, 64 benign and 20 malignant (mean diameter, 15.1 mm), detected but not characterised on B-mode US in 72 women, Breast Imaging Reporting and Data System (BI-RADS) US category 3 (n=56) or category 4 (n=28), were studied with US elastography and classified in consensus by two radiologists according to a five-point colour scale. Sensitivity, specificity and positive and negative predictive values (PPV and NPV) of US elastography compared with conventional US were calculated…
Cerebral and spinal MR-findings in patients with postrepair myelomeningocele
1990
In 114 patients with postrepair myelomeningocele MRI of the spine was performed. Tethered cord (89%) and associated malformations (syrinx, lipoma etc.) (33%) were the most important findings. Additional MRI scans of the head (44 patients) revealed numerous further anomalies. Arnold Chiari malformation was found in 76% of the patients (ACM I: 32%, ACM II: 44%). In the ACM II group compression of lower cranial nerves, brain stem, and cerebellum can lead to considerable neurologic symptoms. Therefore in patients with progressive neurologic dysfunction a complete investigation of the whole spine and brain is necessary. MRI proves to be the diagnostic procedure of choice in patients with dysraph…
Anterior fusion for cervical spondylosis
1978
Anterior fusion was performed on 138 patients as treatment for degenerative changes of the cervical vertebral column. The results were checked after up to 11 years in 122 patients and were found to be good in 55%, fair in 3895% and poor in 6.5%. There were complications of phonetic paralysis in one case, Horner syndrome in two cases, 2 wound infections, and complaints about the iliac crest in 3 patients. Kyphosis at the fused segment occurred 26.1% of cases, the average angle being 15.3 degrees, but it did not influence the clinical results. Mortality was 2%. Inadequate visualization of the nerve roots at operation was probably the reason for the segmental deficits and suggestions were made…
Migraine and handedness.
2020
Migraine is a typically unilateral disorder in adulthood; however, the reasons for painful lateralization have been little investigated. The possible influence of manual dominance was suggested. We aimed to investigate the localization of pain in migraine attacks in right-handed and left-handed subjects. The retrospective study collected 546 patients with migraine aged between 16 and 65 years, reporting the manual dominance to the Edinburgh test. We included 466 right-handed and 80 left-handed subjects with migraine. We registered 4215 unilateral painful attacks. The right-handers had 3412 unilateral episodes; 62.8% of the attacks were characterized by pain on the right side and 37.2% by pa…
The diagnostic value of CT for radiotherapy of cerebral tumors
1978
The paper deals with CT followup studies on 73 patients with cerebral tumors who received radiotherapy. The value of CT for the indication of radiotherapy, for followup therapy and for the demonstration of therapeutic success are discussed. Since the cerebral tumors become visualized by means of CT in their entire extent and can be differentiated from perifocal edema, the question arises whether radiotherapy should consist of higher doses in the future. It is also suggested that the "clinical malignancy" may be used to compare the behavior of cerebral tumors when there is no exact histological classification. The possible histopathological effects of radiotherapy (edema, necrosis) and their…
Bickerstaff brainstem encephalitis. A case report
1992
A 33-year-old woman three weeks after a febrile illness presented with a syndrome of ophthalmoplegia, ataxia and areflexia (SOAA) that characterizes clinically both Bickerstaff and Miller Fisher syndromes. The normality of the electrophysiological tests performed, the CSF findings and the magnetic resonance images proved that the syndrome stemmed from brainstem pathology.