نتایج جستجو برای: contrast improvement
تعداد نتایج: 692741 فیلتر نتایج به سال:
Wireless Capsule Endoscopy (WCE) is a non-invasive as well as an innovative solution for the detection of gastrointestinal diseases especially for small bowel diseases, such as polyps that is a main cause for gastrointestinal bleeding. The quality in these Wireless Capsule Endoscopy (WCE) images is very critical for diagnosis. The image quality is often affected with noise or degradation in acq...
Images are very powerful tools to provide information to the viewers in every field i. e. medical images for doctors, forensic images for police investigation, text images for readers etc. In the process of image acquisition, image clarity is affected by lighting, weather, distance, or equipment used for image capture. Sometimes quality of the image may be corrupted differently in various regio...
Digital Image enhancement provides a multitude of choices for improving the visual quality of radiographic images. When the details of radiographic image are lost due to various reasons, image enhancement has been applied. Many algorithms have been proposed for image enhancement in the past decade. Contrast improvement algorithms are used to enhance image contrast and some algorithms come with ...
BACKGROUND Contrast-induced acute kidney injury (CI-AKI) is associated with increased morbidity and mortality after percutaneous coronary interventions and is a patient safety objective of the National Quality Forum. However, no formal quality improvement program to prevent CI-AKI has been conducted. Therefore, we sought to determine whether a 6-year regional multicenter quality improvement int...
In three patients undergoing mitral balloon valvuloplastyfor mitral stenosis transesophageal echocurdiogruphy was pedormed bdore, immediately afier, and 6 months afier the procedure. In the one patient with persistent hemodynamically favorable result, the spontaneous echocardiographic contrast, which was seen in all three preoperatively, did not recur; in the other two patients the phenomenon w...
Systemic inflammation is associated with reduced lung function in obese individuals. Whether aerobic training in obese subjects is associated with improvement in systemic inflammation and lung function is unclear. The aim of this study was to evaluate the effects of a 12 week aerobic training on C- reactive protein and lung function in obese men. Materials and Methods: Twenty-three obese subj...
Introduction: Tympanoplasty is the standard and well established procedure for closure of tympanic membrane perforations .This paper compares the results of tympanoplasty in terms of hearing improvement and graft incorporation in patients with chronic perforation of the tympanic membrane between two groups with and without active drainage at the time of surgery. Materials and Methods: Sixty re...
در سالهای اخیر،اختلالات کیفیت توان مهمترین موضوع می باشد که محققان زیادی را برای پیدا کردن راه حلی برای حل آن علاقه مند ساخته است.امروزه کیفیت توان در سیستم قدرت برای مراکز صنعتی،تجاری وکاربردهای بیمارستانی مسئله مهمی می باشد.مشکل ولتاژمثل شرایط افت ولتاژواضافه جریان ناشی از اتصال کوتاه مدار یا وقوع خطا در سیستم بیشتر مورد توجه می باشد. برای مطالعه افت ولتاژ واضافه جریان،محققان زیادی کار کرده ...
We present a new spatial compounding method to improve the contrast of ultrasonic images for non-delayed sequential beamforming (NDSB). Sequential adopts more than one beamformer reconstruct B-mode which has advantage simple front-end electronics and fast data transfer rate. Via field pattern analysis, we propose where two sub-images can be reconstructed along with NDSB sub-image. These seen as...
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