The objective of this contribution consists in segmenting dissected aortas in computed tomography angiography (CTA) data in order to obtain morphological specifics of each patient’s vessel. Customdesigned stent-grafts represent the only possibility to enable minimally invasive endovascular techniques concerning Type A dissections, which emerge within the ascending aorta (AA). The localization o...

Often in neurosurgical planning a dual echo acquisition is performed that yields proton density (PD) and T2-weighted images to evaluate edema near a tumour or lesion. The development of vessel segmentation algorithms for PD images is of general interest since this type of acquisition is widespread and is entirely noninvasive. Whereas vessels are signaled by black blood contrast in such images, ...

One strategy was compression ultrasonography, followed by anticoagulation in case of positive results (high probability ventilation-perfusion (VQ) scans) or by VQ scan or spiral computed tomography (CT) in case of negative results. Low probability VQ scans resulted in no treatment, whereas high probability VQ scans resulted in anticoagulation. Intermediate tests were followed by a second test (...

One strategy was compression ultrasonography, followed by anticoagulation in case of positive results (high probability ventilation-perfusion (VQ) scans) or by VQ scan or spiral computed tomography (CT) in case of negative results. Low probability VQ scans resulted in no treatment, whereas high probability VQ scans resulted in anticoagulation. Intermediate tests were followed by a second test (...

Many cases in which the skin complication are caused by increased exposure dose to skin by interventional radiology (IVR) are reported. Therefore, the decrease of patient exposure dose at IVR is important. Patient exposure dose by using IVR-computed tomography (CT) unit is defined as the sum of exposure dose from both angiography and CT scanner. The dose decrease with the CT device was examined...

introduction bolus is a soft and resilient material which is used for increasing skin dose or to even out the irregular patient contour. the main property of various materials used presently as bolus is the water-equivalent electron density. ethyl methacrylate is used as a soft-liner in dentistry and its physical and chemical properties are proved to be nontoxic for human body. the goal of this...

Abstract Background The prevalence of coronary artery fistula (CAF) among Egyptian population is increasing due to widespread availability CT angiography using high-end scanners. purpose this observational study was determine the incidence and types CAF detected during routinely performed angiography. Results Among 2263 retrospectively evaluated studies, only in 17 (0.75%) patients with proxima...

chronic rhinosinusitis (crs) is a common disease which is usually diagnosed clinically, considering the combination of natural history, physical examination and imaging studies. this study aimed to evaluate the clinical value of routine postoperative histopathologic examination (pohe) in patients with a clinical diagnosis of chronic rhinosinusitis with polyposis (crswp), or without polyposis (c...

in this study, 22 patients (15-75 years old) were selected and transferred to ct scan for tumor ablation. for ablations, after prep and drep under the local anesthesia and mild sedation in proper position, small incision made and special needle inserted and guided by proper direction to the core of the tumor. then, laser probe inserted through the needle and laser energy delivered. although we ...