BACKGROUND The prognostic value of early magnetic resonance imaging (MRI) in dogs after traumatic brain injury (TBI) remains unclear. OBJECTIVES Determine whether MRI findings are associated with prognosis after TBI in dogs. ANIMALS Fifty client-owned dogs. METHODS Retrospective study of dogs with TBI that underwent 1.5T MRI within 14 days after head trauma. MRI evaluators were blinded to...

among the causes of headache, cerebral venous and/or dural sinus thrombosis (cvt) is an important challenge because of its variable clinical presentation, having negative brain ct in up to 30% of cases and unavailability of mri in some situations. on the other hand as d-dimer (dd) test has been reported to be a sensitive test for the exclusion of venous thromboembolism, we sought whether it cou...

Since hyperpolarized 129Xe MRI was first demonstrated in the lung, air space imaging using hyperpolarized noble gases (129Xe and 3He) has progressed at a rapid rate (Goodson, 2002; Zhou, 2011c). Owing to high lipid solubility, absence of background signal in biological tissue, non-invasiveness, lack of radioactivity, different relaxation to oxygenated and deoxygenated blood, and larger chemical...

In this paper, a modified fuzzy c-means (FCM) clustering for medical image segmentation is presented. A conventional FCM algorithm does not fully utilize the spatial information in the image. In this research, we use a FCM algorithm that incorporates spatial information into the membership function for clustering. The spatial function is the summation of the membership function in the neighborh...

BACKGROUND AND PURPOSE Brain edema is a life-threatening consequence of stroke and leads to an extension of the affected tissue. The space-occupying effect due to brain edema can be quantified in rat stroke models with the use of MRI. The present study was performed to test 2 hypotheses: (1) Can quantification of the space-occupying effect due to brain edema serve as a noninvasive measure for b...

Background: Accurate brain tissue segmentation from magnetic resonance (MR) images is an important step in analysis of cerebral images. There are software packages which are used for brain segmentation. These packages usually contain a set of skull stripping, intensity non-uniformity (bias) correction and segmentation routines. Thus, assessment of the quality of the segmented gray matter (GM), ...

Background: While the blood–brain barrier (BBB) is often compromised in glioblastoma (GB), perfusion and consequent delivery of drugs are highly heterogeneous. Moreover, accessibility largely impaired margins tumor for infiltrating cells at origin recurrence. In this work, we evaluate value methods to assess hemodynamic changes induced by a hyperosmolar shock core GB model. Methods: Osmotic was...

The dopamine system in the brain is involved a variety of neurologic and psychiatric disorders, such as Parkinson’s disease, attention-deficit/hyperactivity disorder psychosis. Different aspects can be visualized measured with positron emission tomography (PET) single photon computed (SPECT), including receptors, transporters, release. New developments MR imaging also provide proxy measures bra...

A brain tumor is a mass of unnecessary cells growing in the brain. Brain tissue classification from magnetic resonance images (MRI) is of great importance for research and clinical studies of the normal and diseased human brain. In just a few decades, the use of magnetic resonance imaging (MRI) scanners has grown enormously. An MRI scan is the best way to see inside the human body without cutti...

PURPOSE 1) To evaluate and classify the indications for fetal brain MRI in a tertiary referral center. 2) To assess the contribution of fetal brain MRI to fetal neurosonography. MATERIALS AND METHODS A retrospective study in a tertiary medical center during a two-year period (2011 - 2012) included pregnant women who underwent fetal brain MRI. MRI was implemented at 32 weeks of gestation unles...