A 61-year-old woman underwent computed tomography (CT) angiography for evaluation of syncope and was found to have a central pulmonary artery filling defect (Fig. 1). During an attempted intravascular ultrasound-guided biopsy of the lesion, the patient coded and died. Autopsy confirmed the case as a rare presentation of Rosai-Dorfman disease (Fig. 2 and Supplementary Figs 1 and 2). Supplementar...

The brain MR images of 23 patients with angiographically proved moyamoya disease were reviewed to evaluate the capability of MR to demonstrate vascular and parenchymal abnormalities. All the MR images were obtained on a 2.0 T superconducting system and included T1-weighted sagittal and T2-weighted axial images without implementation of flow compensation (FC). The vascular abnormalities demonstr...

Objective: Multislice computed tomography is an emerging technology with the potential for non-invasive coronary investigation. The aim of this study was to evaluate the feasibility and limitations of multislice computed tomography in the detection of coronary artery disease. Patients and Methods: Multislice computed tomography was performed in symptomatic patients with atypical chest pain and ...

Abstract Objectives To determine the most preferable endoluminal contrast agent among mannitol, polyethylene glycol (PEG), iohexol, and water by comparing various qualitative (distension, fold visibility, homogeneity) quantitative parameters (distension) along with artifacts patient feedback for computed tomography enterography (CTE). Methods This was a prospective study including 120 patients ...

PURPOSE To evaluate the accuracy of CT angiography of occlusive disease of the carotid arteries using three-dimensional surface-rendered images alone and in conjunction with display of axial source images. METHODS Forty-eight symptomatic patients had conventional angiography followed by CT angiography within 24 hours. Images of 96 carotid arteries were acquired using contrast-enhanced spiral ...

BACKGROUND AND PURPOSE Microbleeds (MBs) visualized by use of T2*-weighted gradient-echo MR imaging are pathologic blood-breakdown products after tiny cerebral hemorrhages. The topographic distribution of the lesions has not been compared with that of symptomatic intracerebral hemorrhage (ICH). The purpose of this study was to evaluate the distribution of MBs in the pontocerebellar region and t...

Abstract The present paper analyzes an unsteady magnetohydrodynamic blood flow model of visco-elastic fluid through inclined porous stenosed artery with body acceleration and slip effect. Navier-Stokes equations have been used to describe the model. governing equation is solved by analytic method considering as incompressible, fluid, suspension RBC’s in plasma. Axial velocity, acceleration, rat...

OBJECTIVE To investigate the origin of signals from scanning laser Doppler flowmetry (SLDF) and the influence of axial scan depth on the measurement of blood flow in the rat retina. METHODS We performed SLDF in 5 adult Sprague-Dawley rats using a specially modified Heidelberg retina flowmeter. Axial scans were obtained from +2 diopters (D) to -3 D (in steps of 0.25 D) or from +1 D to -2 D (in...

pattern flap that consists of perforators of three arteries: the external pudendal, superficial femoral, and medial circumflex femoral arteries. The presence of axial vessels from the medial femoral circumflex artery and vein has been demonstrated by transillumination at the time of surgery and by cadaveric study [2,3,5]. Because of the longitudinal axial interconnections of these three vessels...

PURPOSE To evaluate the association of axial length and posterior segment length with central retinal vein occlusion (CRVO) using optical coherence interferometry. METHODS The study group consisted of 29 patients (13 female and 16 male) with unilateral CRVO who were referred to Farabi Eye Hospital. Patients with macular edema were excluded. The mean keratometry (mean K), axial lengths (AL), a...