نتایج جستجو برای: vessels detection

تعداد نتایج: 621769  

Journal: :Frontiers in radiology 2021

Angiogenesis is a key step in the initiation and progression of an invasive breast cancer. High microvessel density by morphological characterization predicts metastasis poor survival women with cancers. However, morphologic subject to variability only can evaluate limited portion Consequently, Magnetic Resonance Imaging (MRI) currently being evaluated assess vascularity. Recently, through new ...

Journal: :IEEE Access 2023

With the development of maritime economy and widespread adoption Automatic Identification System (AIS), number vessels at sea has surged. Unfortunately, some illicitly alter their Maritime Mobile Service Identity (MMSI) codes for personal gain, posing challenges to port management. Currently, detection “Multiple MMSI on a Single Vessel” still relies manual inspections by relevant authorities. T...

2016
Richard Nolz Ulrika Asenbaum Julia Furtner Ramona Woitek Sylvia Unterhumer Andreas Wibmer Alexander Prusa Christian Loewe Maria Schoder

PURPOSE To define the diagnostic precision of non-specialized readers in the detection of type 2 endoleaks (T2EL) in arterial versus venous phase acquisitions, and to evaluate an approach for radiation dose reduction. METHODS The pre-discharge and final follow-up multi-slice CT angiographies of 167 patients were retrospectively analyzed. Image data were separated into an arterial and a venous...

Journal: :medical journal of islamic republic of iran 0
m mohammadi naghadeh from the *department of physiology, faculty of medicinc, tabriz university olmedical sciences, tabriz,i.r. iran je mcgrath the clinicai research initiative in heart failure. west medical building, university ofglasgow. glasgow g21 8qq

we investigated neuronal uptake of noradrenaline (na) at the level of larger vessels (thoracic aorta and vena cava left renal artery and left renal vein lateral saphenous artery and lateral saphenous vein and finally central ear artery and marginal ear vein) in a model devised to mimic heart failure. the model presented here is the rabbit coronary ligation model in which myocardial infarction w...

Journal: :iranian journal of radiology 0
masoud pezeshki rad school of medicine, vascular and endovascular research center, imam reza hospital, mashhad university of medical sciences, mashhad, iran mahyar mohammadifard school of medicine, vascular and endovascular research center, imam reza hospital, birjand university of medical sciences, birjand, iran; chool of medicine, vascular and endovascular research center, imam reza hospital, birjand university of medical sciences, birjand, iran. tel: +98-5118414499, fax: +98-5612226898 hassan ravari school of medicine, vascular and endovascular research center, imam reza hospital, mashhad university of medical sciences, mashhad, iran donya farrokh school of medicine, vascular and endovascular research center, imam reza hospital, mashhad university of medical sciences, mashhad, iran emad ansaripour school of medicine, vascular and endovascular research center, imam reza hospital, mashhad university of medical sciences, mashhad, iran elena saremi school of medicine, vascular and endovascular research center, imam reza hospital, mashhad university of medical sciences, mashhad, iran

results color doppler usg had a sensitivity of 95% and specificity of 98% in diagnosis of arterial injury. positive and negative predictive values of doppler usg were 92.5% and 94.2%, respectively. conclusions color doppler usg can be used as a reliable modality with acceptable sensitivity and specificity values to screen hemodynamically stable patients with limb trauma suspicious for arterial ...

Journal: :anesthesiology and pain medicine 0
ziae totonchi rajaei cardiovascular, medical and research center, iran university of medical sciences, tehran, iran somayeh seifi rajaei cardiovascular, medical and research center, iran university of medical sciences, tehran, iran mitra chitsazan rajaei cardiovascular, medical and research center, iran university of medical sciences, tehran, iran; rajaei cardiovascular, medical and research center, iran university of medical sciences, tehran, iran. tel: +98-9122210385, fax: +98-2122042026, email: [email protected] alireza alizadeh ghavidel rajaei cardiovascular, medical and research center, iran university of medical sciences, tehran, iran farah baazm rajaei cardiovascular, medical and research center, iran university of medical sciences, tehran, iran seyedeh zahra faritus rajaei cardiovascular, medical and research center, iran university of medical sciences, tehran, iran

conclusions following cabg, the most severity of pain was reported at surgical incision on time t2. pain began to decrease from the third day following the operation. age, sex and bmi along with operation-related factors such as duration of cbp or chest tube drainage may affect the pain pattern following cabg surgery. patients and methods the present study was conducted on 138 patients who unde...

2013
Muhammad Waseem Khan

Diabetic retinopathy (DR) is a diabetes related eye disease which occurs when blood vessels in the retina become swelled and leaks fluid which ultimately leads to vision loss. Several image processing techniques including Image Enhancement, Segmentation, Image Fusion, Morphology, Classification, and registration has been developed for the early detection of DR on the basis of features such as b...

2016
S. Venkatesh

A new method for the detection of blood vessels that improves the detection of exudates in fundus photographs. The method starts with pre-processing to enhance the input image. The initial estimation of exudates is obtained by segmenting the optic disc and blood vessels from the fundus image. In order to segment the optic disc and blood vessel separate algorithm were used. First, optic disc is ...

2014
Michael Schuster Michael Blaich

Collision avoidance for vessels highly depends on a robust obstacle detection. This is commonly achieved by use of high precision radar sensing. For smaller vessels however, the use of low-cost sensors is typical. The idea of this work is to improve the robustness of collision avoidance by integrating a sensor model together with the collision avoidance algorithm in order to consider the accura...

2003
Thitiporn Chanwimaluang Guoliang Fan

This paper presents an efficient method for automatic detection and extraction of blood vessels in retinal images. Specifically, we also delineate vascular intersections/crossovers. The proposed algorithm is composed of four steps: matched filtering, local entropy thresholding, length filtering, and vascular intersection detection. The purpose of matched filtering is to enhance the blood vessel...

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