Background and Purpose— To explore relationships among gender, body size, neck the diameters of common carotid artery (CCA) internal (ICA). Methods— Using multivariate regression, best predictors sonographic CCA ICA were determined based on age, height, weight, mass index, surface area, circumference, length, blood pressure. Results— Measurements obtained in 500 consecutive patients (age 52±15 years; 61% women). Mean (4.66±0.78 mm) (6.10±0.80 women significantly smaller than men: 5.11±0.87...

Purpose: To develop and retrospectively determine the accuracy of a magnetic resonance (MR) imaging strategy to differentiate intraaxial brain masses, with histologic findings or clinical diagnosis as reference standard. Materials Methods: The study was HIPAA compliant approved by institutional review board. A waiver informed consent obtained. developed on basis conventional MR imaging, diffusion-weighted perfusion proton spectroscopy classify masses low-grade primary neoplasms, high-grade...

Only a limited number of transcranial color-coded Doppler studies have provided ranges for the normal reference values cerebral hemodynamic parameters. These reports are not fully convergent in relation to range or age and sex dependence blood flow The aim present study was provide data regarding ranges.We examined 182 healthy volunteers (79 men 103 women; range, 20-86 years old) with sonography via temporal acoustic window 2.5-MHz probe. subjects were divided into three groups: 20-40 old...

Identification of the epidermal growth factor receptor variant III (EGFRvIII) mutation in glioblastoma has become increasingly relevant optimization therapy. Traditionally, determination tumor EGFRvIII-expression relied on tissue-based diagnostics. Here, we assess accuracy magnetic resonance perfusion-weighted imaging (MR-PWI) discriminating EGFRvIII-expressing subtype. We analyzed RNA from 132 primary human tissue samples by reverse-transcription polymerase chain reaction (RT-PCR) for...

<h3>BACKGROUND AND PURPOSE:</h3> Oligodendrogliomas with 1p/19q chromosome LOH are more sensitive to chemoradiation therapy than those intact alleles. The usefulness of dynamic susceptibility contrast–PWI-guided ¹H-MRS in differentiating these 2 genotypes was tested this study. <h3>MATERIALS METHODS:</h3> Forty patients oligodendrogliomas, (<i>n</i> = 23) and alleles 17), underwent MR imaging 2D-¹H-MRS. VOI overlaid on FLAIR images encompass the hyperintense abnormality...

Purpose: To prospectively determine whether diffusion-tensor magnetic resonance (MR) imaging in conjunction with two-dimensional chemical shift can assist identifying upper motor neuron involvement and disease severity duration be predicted based on parameters patients amyotrophic lateral sclerosis (ALS). Materials Methods: Institutional review board approval informed consent were obtained for this HIPAA-compliant study. Fifteen ALS (12 men, three women; mean age, 57.3 years) clinical...

To determine the accuracy of relative cerebral blood volume (rCBV) fraction for distinguishing high-grade recurrent neoplasm from treatment-related necrosis (TRN) in enhancing masses identified on surveillance magnetic resonance (MR) images following treatment primary or secondary brain neoplasm.This institutional review board approved and HIPAA-compliant retrospective study included 30 patients undergoing resection mass appearing after with surgery radiation, without chemotherapy. The was...

Recent evidence suggests that physiological changes in the concentration of endogenous estrogens may influence stroke outcome. The purpose this study was to determine a menstrual cycle-related profile blood flow through carotid arteries and its correlation with estrogen concentration.The velocity cross-sectional area common artery, internal artery (ICA), external (ECA) were measured duplex Doppler sonography throughout cycle 14 healthy women. Concentration plasma 17beta-estradiol,...

Object Treatment of patients with oligodendrogliomas relies on histopathological grade and characteristic cytogenetic deletions 1p 19q, shown to predict radio- chemosensitivity prolonged survival. Perfusion weighted magnetic resonance (MR) imaging allows for noninvasive determination relative tumor blood volume (rTBV) has been used the astrocytic neoplasms. The aim this study was use perfusion MR profile in oligodendroglial Methods Thirty neoplasms who underwent preoperative were...

Object The authors conducted a study to compare the sensitivity and specificity of helical CT angiography (CTA) digital subtraction (DSA) in detecting intracranial arterial injuries after penetrating traumatic brain injury (PTBI). Methods In retrospective evaluation 48 sets angiograms from 45 consecutive patients with PTBI, 3 readers unaware DSA findings reviewed CTA images determine presence or absence injuries. A fourth reader all disagreements decided among interpretations. Sensitivity,...

PURPOSE: To prospectively determine the accuracy of transcranial color-coded duplex ultrasonography (US) used alone and in conjunction with carotid artery US for diagnosis middle cerebral (MCA) spasm, intraarterial digital subtraction angiography (DSA) as reference standard. MATERIALS AND METHODS: The institutional ethics committee approved study. Each patient, or members patient's family, gave informed consent. One hundred twenty consecutive patients (64 women, 56 men; mean age, 45.5 years...

ABSTRACT PURPOSE AND BACKGROUND To determine whether the proportion of patients with suitable temporal bone acoustic windows is different for conventional transcranial Doppler sonography (TCD) and color‐coded duplex (TCCS), based on a head‐to‐head comparison in same population patients. SUBJECTS METHODS Ninety patients, age 22–88 years (mean 57.1 ± 11.7 years), 46 women 44 men, 66 Caucasian, 19 African‐American, five Hispanic, underwent routine TCD TCCS examination close time to each other....

<b>BACKGROUND AND PURPOSE:</b> Nonimaging transcranial Doppler sonography (TCD) and imaging TCD (TCDI) are used for determination of the risk stroke in children with sickle cell disease (SCD). The purpose was to compare angle-corrected, uncorrected TCDI, blood flow velocities SCD. <b>MATERIALS METHODS:</b> A total 37 (mean age, 7.8 ± 3.0 years) without intracranial arterial narrowing determined MR angiography, were studied use TCDI at same session. Depth insonation mean correction angle...

To prospectively compare accuracies of transcranial color-coded duplex sonography (TCCS) and Doppler (TCD) in the diagnosis middle cerebral artery (MCA) vasospasm.Prospective blinded head-to-head comparison TCD TCCS methods using digital subtraction angiography (DSA) as reference standard.Department Radiology a tertiary university health center metropolitan area.Eighty-one consecutive patients (mean age, 53.9 +/- 13.9 years; 48 women). The indication for DSA was subarachnoid hemorrhage 71...

A significant number of nonenhancing (NE) gliomas are reported to be malignant. The purpose this study was compare the value advanced MR imaging techniques, including T2*-dynamic susceptibility contrast PWI (DSC-PWI) and proton magnetic resonance spectroscopy ( 1 HMRS) in evaluation NE gliomas. Twenty patients with underwent MRI DSC-PWI HMRS. relative CBV (rCBV) measurements were obtained from regions maximum perfusion. peak ratios choline/creatine (Cho/Cr) myo-inositol/creatine (mIns/Cr)...

This study evaluated the relationship of cerebrovascular reactivity in young healthy women with changes concentrations circulating ovarian hormones throughout menstrual cycle. Nineteen nulliparous, right-handed, regularly menstruating (age 23–25 years) underwent color-coded duplex sonography common (CCA), internal (ICA) and external (ECA) carotid arteries on both sides. Mean blood flow velocity values measured before ten minutes after intravenous administration 1000 mg acetazolamide (ACE)...

Object The authors’ aim was to assess the ability of apparent diffusion coefficient (ADC) ratios in distinguishing brain abscesses from cystic or necrotic neoplasms. Methods Fifty-three patients with rim-enhancing masses observed on T 1 -weighted MR images were included: 26 had (14 bacterial, six nonbacterial, and unknown origin), 11 glioblastoma multiforme, 16 metastasis. ADC values, derived diffusion-weighted imaging, measured most homogeneous portion component mass. calculated by dividing...

To determine the specific facial computed tomographic (CT) findings that can be used to predict traumatic optic neuropathy (TON) in patients with blunt craniofacial trauma and propose a scoring system identify at highest risk of TON.This study was compliant HIPAA, permission obtained from institutional review board. Facial CT examination 637 consecutive history were evaluated retrospectively. The following variables evaluated: midfacial fractures, extraconal hematoma, intraconal hematoma...

<h3>BACKGROUND AND PURPOSE:</h3> Age-related changes in brain morphology are crucial to understanding the neurobiology of sickle cell disease. We hypothesized that growth trajectories for total GM volume, WM and regional volumes altered children with disease compared controls. <h3>MATERIALS METHODS:</h3> analyzed T1-weighted images brains 28 (mean baseline age, 98 months; female/male ratio, 15:13) healthy age- sex-matched controls 99 16:12). The number MR imaging examinations was 141 (2–4...

A Guide to the Identification of Major Cerebral Arteries with Transcranial Color Doppler SonographyJ. Krejza1, Z. Mariak2, E. R. Melhem3 and J. Bert4Audio Available | Share