نتایج جستجو برای: lesions volume
تعداد نتایج: 476769 فیلتر نتایج به سال:
BACKGROUND AND PURPOSE Brain injury after cardiac surgery is a serious concern for patients and their families. The purpose of this study was to use 3-T fluid attenuated inversion recovery MRI to characterize new and preexisting cerebral ischemic lesions in patients undergoing cardiac surgery and to test whether the accumulation of new ischemic lesions adversely affects cognition. METHODS Dig...
Background: The present study aimed to compare the clinical efficacy and safety profile of Ziferon and Betaferon. Objectives: In total, 41 consecutive patients with relapsing forms of Multiple Sclerosis (MS) were selected from the MS outpatient clinic affiliated to Tehran University of Medical Sciences. The patients were randomly assigned into two groups. Methods: Each group either received Z...
OBJECTIVE To evaluate the sensitivity of multiparametric magnetic resonance imaging (mp-MRI) for detecting prostate cancer foci, including the largest (index) lesions. PATIENTS AND METHODS In all, 115 patients with biopsy confirmed prostate cancer underwent mp-MRI before radical prostatectomy. A single expert radiologist recorded all prostate cancer foci including the index lesion 'blinded' t...
BACKGROUND AND PURPOSE Preventing cerebral embolisms is a major concern with carotid artery stenting (CAS). This study evaluated 3-dimensional T1-weighted gradient echo (3D T1GRE) sequence to predict cerebral embolism related to CAS. METHODS We performed quantitative analyses of the characteristics of 47 carotid plaques before CAS by measuring the signal intensity ratio (SIR) and plaque volum...
Objective To investigate the relationship between brain volume and disability worsening over ≥3 years in the natural history of primary progressive multiple sclerosis using data from the placebo group of the INFORMS trial (n = 487; clinicaltrials.gov NCT00731692). Methods Magnetic resonance imaging scans were collected annually. Brain volume loss was determined using SIENA. Patients were stra...
BACKGROUND Olfactory dysfunction in MS patients is reported in the literature. MRI of the olfactory bulb (OB) is discussed as a promising new testing method for measuring olfactory function (OF). Aim of this study was to explore reasons for and optimize the detection of olfactory dysfunction in MS patients with MRI. MATERIALS AND METHODS OB and olfactory brain volume was assessed within 34 MS...
3D volume reconstruction is used to identify the skin cancer at earlier stage. Through the person may be preventing from death. The subsurface information such as blood layer thickness and blood volume components can be identifying by multispectral transillumination images of the skin lesions. Lesions are simulated by using volume reconstruction, thus the result shows excellent volume with accu...
The hippocampus plays an essential role in spatial learning. To investigate whether the whole structure is equally important, we compared the effects of variously sized and localized hippocampal aspiration lesions on spatial learning in a Morris water maze. The volume of all hippocampal lesions was determined. Dorsal hippocampal lesions consistently impaired spatial learning more than equally l...
BACKGROUND AND PURPOSE Stereotactic radiosurgery is known to control 85%-95% of intracranial metastatic lesions during a median survival of 6-8 months. However, with the advent of newer systemic cancer therapies, survival is improving; this change mandates a longitudinal quantitative analysis of the radiographic response of brain metastases to radiosurgery. MATERIALS AND METHODS MR imaging of...
CONTEXT Hypointense lesions on T1-weighted spin-echo magnetic resonance images (T1 lesions) represent destructive multiple sclerosis (MS) lesions, consisting of axonal loss and matrix destruction. These lesions are being used as a secondary outcome measure in phase III clinical trials. Clinical determinants of T1 lesions may differ between subgroups of patients with MS and subsequently may have...
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