نتایج جستجو برای: ct scan images
تعداد نتایج: 420213 فیلتر نتایج به سال:
Liver Cancer is one of the fastest growing cancer in the world. According to a survey the liver cancer ranks as the 11 most commonly occurring cancer. The survey was done on the basis of survival rate. If the person has survived for 5 years then the survival rate is chosen as 5 years. From study it is revealed that every one man among three and every one woman among nine has chance of getting l...
در این پروژه روشی برای مدل سازی قطعات صنعتی از عکسهای ct ارائه شده است. در فصل دوم فیزیک پرتو برداری ct و تولید تصویر به اختصار توضیح داده شده است. در فصل سوم الگوریتمهای پردازش تصویر که در این پروژه به کار رفته شرح داده شده است. توسط این الگوریتم ها عمل قطعه بندی و شناسایی لبه انجام می شود که در فصل مذکور روش های لبه یابی به کمک الگوریتم sobel و canny و مزایا و معایب هر کدام تشریح شده است و در...
Medical imaging is the technique and process used to create images of the human body for clinical purposes and diagnosis. Medical imaging is often perceived to designate the set of techniques that noninvasively produce images of the internal aspect of the body. The x-ray computed tomographic (CT) scanner has made it possible to detect the presence of lesions of very low contrast. The noise in t...
introduction: endoscopy is an invasive procedure and finding noninvasive alternative tools in detection of probable upper gastrointestinal (gi) tract injuries following caustic ingestion is an area of interest. the present study aimed to evaluate the screening performance characteristics of thoraco-abdominal computed tomography (ct) scan in this regard. methods: this prospective cross sectional...
introduction: various computer assisted medical procedures such as dental implant, orthodontic planning, face, jaw and cosmetic surgeries require automatic quantification and volumetric visualization of teeth. in this regard, segmentation is a major step. material and methods: in this paper, inspired by our previous experiences and considering the anatomical knowledge of teeth and jaws, we prop...
Lung cancer is one of the most serious health problems in the world. Lung Computer-Aided Diagnosis (CAD) is a potential method to accomplish a range of quantitative tasks such as early cancer and disease detection, analysis of disease progression. Edge detection in Lung image is a fundamental step in CAD system and many algorithms have suggested for edge detection in image. In this paper a new ...
To improve the identification of cardiac regions in Electrical impedance tomography (EIT) pulmonary perfusion images, a model of wavelet transform was developed. The main goal was to generate maps of the heart using EIT images in a controlled animal experiment using a healthy pig and in two human volunteers. The model was capable of identifying the heart regions, demonstrated robustness and gen...
FDG PET CT scan is considered to be a sensitive tool to detect skeletal metastasis in known malignancies. However, it’s high sensitivity and low specificity may account for false positive diagnosis in cases of trauma, infection, inflammation and other benign conditions. Skeletal hemangioma is one of the common benign conditions which are typically ametabolic on FDG PET CT with no uptake on bone...
We report a 31-year-old male with history of left forearm neuroma surgically removed, consulting for supraclavicular bultoma congruent the supradiaphragmatic lymphoproliferative syndrome in computed tomography (CT) scan. [18F]FDG PET/CT images helped to establish most diagnostic yield lesion biopsy, and allowed an accurate staging neurofibromatosis (NF) disease, leading appropriate therapeutic ...
PURPOSE Evaluation of a new software tool for generation of simulated low-dose computed tomography (CT) images from an original higher dose scan. MATERIALS AND METHODS Original CT scan data (100 mAs, 80 mAs, 60 mAs, 40 mAs, 20 mAs, 10 mAs; 100 kV) of a swine were acquired (approved by the regional governmental commission for animal protection). Simulations of CT acquisition with a lower dose ...
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