نتایج جستجو برای: digital imaging
تعداد نتایج: 748288 فیلتر نتایج به سال:
Although conventional or digital X-ray angiography is still the standard method in the diagnosis of intracranial vascular abnormalities, MR imaging is gaining a more prominent role in this respect. MR angiography is a new method of vascular imaging that provides projection images resembling conventional angiography [1 , 2]. We present the MR angiographic findings in two patients with primitive ...
The Human Vision and Electronic Imaging Conferences (HVEI) at the IS&T/SPIE Electronic Imaging meetings have brought together research in the fundamentals of both vision and digital technology. This conference has incorporated many color disciplines that have contributed to the theory and practice of today's imaging: color constancy, models of vision, digital output, high-dynamic-range imaging,...
X‐rays were discovered in 1895 by Wilhelm Roentgen. Digital radiology has overtaken conventional screen‐film radiography since it was introduced in the mid‐1980s.[1] Digital imaging uses sensor of solid‐state, and information is presented and stored as an image using a computer. The dawn of the digital era in dental radiography came in 1987 with the first digital radiography system called radio...
Detection of breast cancers with mammography is a challenging task. Images must be of high quality if cancers are to be found at the earliest possible time. This motivates the need for a quality assurance program. It has long been recognized that the performance of a complex imaging system such as mammography can drift over time and, therefore, quality control procedures must be in place to ens...
Introduction Digital dental radiography was introduced in 1987, and many thought this technology would quickly take over as the standard in dental radiology. However, this has not been the case as only 7% to 8% of dental professionals currently use digital imaging systems (1). Many dentists have been resistant to change as the diagnostic quality of digital radiography has been questionable when...
Cathy Treadaway is the Research Assistant (Textiles) at the University of Wales Institute Cardiff, U.K. and is currently investigating the impact of digital imaging on textile practice for a PhD research project. Trained as a surface pattern and textile designer she has worked digitally since 1982 and was an early exponent of computer-aided surface pattern and textile design within UK art educa...
The digital imaging of cultural and heritage objects has become commonplace as memory institutions create digital surrogates and representation of their holdings, generally to increase public access by providing the resulting images online, but also to provide accurate and detailed records, and to facilitate detailed analysis of objects, documents, buildings, and artefacts. Commercially availab...
up to 19% of breast malignancies may be missed by conventional imaging techniques, especially when they are concurrent or co-located with other benign lesions. however, more sensitive techniques, such as magnetic resonance imaging (mri), are often too expensive for routine use in developing countries. contrast-enhanced, dual-energy digital mammography (cesm) is a recently introduced imaging mod...
One of the most significant achievements in digital photogrammetry in the last decade is the development of large format digital mapping cameras. In addition to large format digital mapping cameras, a number of medium format digital mapping cameras systems have also been developed. At Pictometry, a medium format digital imaging system has been developed and been widely used for acquisition of b...
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