نتایج جستجو برای: ultrasound image de

تعداد نتایج: 2000066  

2013
Navjot Kaur Sunil Khullar

Digital images are generally affected by noise due to acquisition process or by transmission process [7]. In most of the images we can found a large variety of noise. The numbers of algorithms are used to remove noise from the image depending upon noise model. Number of researchers are working on the field of de-noise the images [10]. In this paper we proposed an enhanced sticks filtering techn...

Journal: :Medical image computing and computer-assisted intervention : MICCAI ... International Conference on Medical Image Computing and Computer-Assisted Intervention 2005
Jeffrey A. Stoll Pierre E. Dupont

A family of passive markers is presented by which the position and orientation of a surgical instrument can be computed from its ultrasound image using simple image processing. These markers address the problem of imaging instruments and tissue simultaneously in ultrasound-guided interventions. Marker-based estimates of instrument location can be used in augmented reality displays or for image-...

Journal: :Journal of biomedical optics 2008
Roy G M Kolkman Peter J Brands Wiendelt Steenbergen Ton G van Leeuwen

A real-time photoacoustic imaging system is designed and built. This system is based on a commercially available ultrasound imaging system. It can achieve a frame rate of 8 frames/sec. Vasculature in the hand of a human volunteer is imaged, and the resulting photoacoustic image is combined with the ultrasound image. The real-time photo acoustic imaging system with a hybrid ultrasound probe is d...

2011
Jappreet Kaur Jasdeep Kaur Manpreet Kaur

Ultrasound imaging is the most commonly used imaging system in medical field. Main problem related to this imaging technique is introduction of speckle noise, thus making the image unclear. The success of ultrasonic examination depends on the image quality which is usually retarded due to speckle noise. There have been several techniques for effective suppression of speckle noise present in ult...

Objective- The aim of this study was to obtain first time diagnosis of pregnancy and study of fetal development in different times of pregnancy period. Design- ِDescriptive study. Animals- 8 pregnant Markhoz goats. Procedure- 2D ultrasound was performed from day 25 to 130 of gestation, twice in week from day 25 to 70 and once in week from day 70 to 130 of gestation on eight goa...

2014
Lu Yin Jiaan Zhu Qin Xue Niansong Wang Zhenlong Hu Yunxia Huang Fang Liu Bing Hu

OBJECTIVE To assess the value of MicroPure, a new ultrasound image processing technique, in identifying microcalcifications (formed by monosodium urate crystals) in the first metatarsophalangeal joints attacked by gout compared to gray-scale ultrasound images. MATERIALS AND METHODS Thirty-six patients who fulfilled the study inclusion criteria underwent gray-scale ultrasound and MicroPure exa...

Journal: :iranian journal of radiation research 0
d. han medical imaging center, the first hospital affiliated kunming medical college, kunming, 650032, china x.j. xie medical imaging center, the first hospital affiliated kunming medical college, kunming, 650032, china l. wen medical imaging center, the first hospital affiliated kunming medical college, kunming, 650032, china

background: this study set out to evaluate the utility of cerebrovascular virtual non-contrast (vnc) scans. materials and methods: conventional non-contrast (cnc) and dual-energy computed tomography angiography (de-cta) head scans were conducted on 100 subjects, of which 46 were normal, 15 had parenchymal hematomas of the brain, 13 had ischemic infarction, 22 had tumors, and 4 had calcified les...

Journal: :Computer methods and programs in biomedicine 2014
Christos P. Loizou Charoula Theofanous Marios Pantziaris Takis Kasparis

Ultrasound imaging of the common carotid artery (CCA) is a non-invasive tool used in medicine to assess the severity of atherosclerosis and monitor its progression through time. It is also used in border detection and texture characterization of the atherosclerotic carotid plaque in the CCA, the identification and measurement of the intima-media thickness (IMT) and the lumen diameter that all a...

2018
Sara Aldekhyl Rodrigo B. Cavalcanti Laura M. Naismith

INTRODUCTION The ability to maintain good performance with low cognitive load is an important marker of expertise. Incorporating cognitive load measurements in the context of simulation training may help to inform judgements of competence. This exploratory study investigated relationships between demographic markers of expertise, cognitive load measures, and simulator performance in the context...

Azadeh Bashiri, Behrouz Alizadeh Savareh Mehrnaz Mostafavi

Automated data analysis and pattern recognition techniques are the requirements of biological and proteomicsresearch studies. The analysis of proteins consists of some stages among which the analysis of two dimensionalelectrophoresis (2-DE) images is crucial. The aim of image capturing is to generate a Photostat that can be used infuture works such as image comparison. The researchers introduce...

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