نتایج جستجو برای: digital imaging

تعداد نتایج: 748288  

IntroductionA fine balance of image quality and radiation dose can be achieved by optimization to minimize stochastic and deterministic effects. This study aimed in ensuring that images of acceptable quality for common radiographic examinations in digital imaging were produced without causing harmful effects. Materials and MethodsThe study was conducted in three phases. The pre-optimization inv...

Journal: :Toxicologic pathology 2006
Xiaoyou Ying Thomas M Monticello

Modern imaging technology, now utilized in most biomedical research areas (bioimaging), enables the detection and visualization of biological processes at various levels of the molecule, organelle, cell, tissue, organ and/or whole body. In toxicologic pathology, the impact of modern imaging technology is becoming apparent from digital histopathology to novel molecular imaging for in vivo studie...

2014
P. Sprawls

Use of digital imaging within all of the medical imaging modalities and methods provides many advantages and values to the practice of clinical medicine. However, the use of digital technology, digital image structure, and the ability to process digital image data in many ways add additional complexity to many imaging procedures. All medical imaging professionals, including radiologists, techno...

انتظار مهدی, محمد, خم خاجی, جمال, قدیری, حسین , مجرد کاهانی, محمد مهدی , هاشمی, سمانه, کمالی اصل, علیرضا ,

Background and purpose: Dual-energy mammography is a technique which is used to enhance the accuracy of breast cancer diagnosis especially in dense breasts. This study was conducted based on the simultaneous use of two contrast agents for automatic separation and also to evaluate their accuracy using dual-energy digital mammography. Materials and methods: A breast phantom was designed and b...

2008
David R. Dance

The use of X-ray image receptors that produce a digital image is becoming increasingly important. Possible benefits include improved dynamic range and detective quantum efficiency, improved detectability for objects of low intrinsic contrast, and reduced radiation dose. The image can be available quickly. The display is separated from the image capture so that processing and contrast adjustment...

Journal: :Optics express 2005
Lluis Torner Juan Torres Silvia Carrasco

A major application of optics is imaging all types of structural, physical, chemical and biological features of matter. Techniques based on most known properties of light have been developed over the years to remotely acquire information about such features. They include the spin angular momentum, encoded in the polarization, but not yet the orbital angular momentum encoded in its spiral spectr...

Journal: :IEEE transactions on image processing : a publication of the IEEE Signal Processing Society 1997
Gaurav Sharma H. Joel Trussell

This paper surveys current technology and research in the area of digital color imaging. In order to establish the background and lay down terminology, fundamental concepts of color perception and measurement are first presented using vector-space notation and terminology. Present-day color recording and reproduction systems are reviewed along with the common mathematical models used for repres...

2015
Edoardo Charbon

The appearance of miniaturized single-photon detectors has enabled massively parallel conversion of photons to digital signals that can be readily processed and/or transported with negligible losses. As a consequence, a new class of imaging sensors is emerging, known collectively as all-digital image sensors, for detection and processing of ultra-fast and complex photonic events, often present ...

2004
Steve Park

In this paper, the combined effects of image gathering, sampling, and reconstruction are analyzed in terms of image fidelity. The analysis is based upon a standard end-to-end linear system model which is sufficiently general so that the results apply to most line-scan and sensor-array imaging systems. Shift-variant sampling effects are accounted for with an expected value analysis based upon th...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید