نتایج جستجو برای: computed radiography

تعداد نتایج: 226905  

Journal: :Medical physics 2006
Jovan G Brankov Miles N Wernick Yongyi Yang Jun Li Carol Muehleman Zhong Zhong Mark A Anastasio

Conventional x-ray computed tomography (CT) produces a single volumetric image that represents the spatially variant linear x-ray attenuation coefficient of an object. However, in many situations, differences in the x-ray attenuation properties of soft tissues are very small and difficult to measure in conventional x-ray imaging. In this work, we investigate an analyzer-based imaging method, ca...

Journal: :Physics in medicine and biology 2006
O Rampado P Isoardi R Ropolo

Quality controls for testing the performance of computed radiography (CR) systems have been recommended by manufacturers and medical physicists' organizations. The purpose of this work was to develop a set of image processing tools for quantitative assessment of computed radiography quality control parameters. Automatic image analysis consisted in detecting phantom details, defining regions of ...

2017
Semra Dogan Asiye Safak Bulut

DOI: 10.14744/ejmo.2017.32042 EJMO 2017;1(2):108–110

2008
Meng ZHENG Keqin DING Guang CHEN

Computed radiography (CR) with storage phosphor based luminescence imaging plate (IP) is based on the principle that phosphors can be developed in such a way that they retain the latent image information until stimulated by laser light. This paper focuses on the application of industrial X-ray detecting and image processing techniques. In order to improve the validity of the images it is necess...

2004
Aaron Huser Gary Wendt

In order to accurately diagnose patient conditions, an exposure time must be assigned to any Xray image taken. Previously, X-rays were assigned a time based on their development, not exposure. In order to improve this process, a device was designed to accurately and automatically timestamp an X-ray radiograph upon exposure. The device will ultimately be affixed to the computed radiography (CR) ...

Journal: :International journal of radiation research 2021

Background: In diagnostic radiography, selection of kVp and mAs to produce acceptable image quality with a minimum dose has been challenge even for experience radiographers. The aim this study was determine optimal exposure factors lumbar spine AP examinations in computed radiograph using dose-image analysis. Materials Methods: A female anthropomorphic phantom used analysis the (mAs kVp) AP. In...

Journal: :Vlaams Diergeneeskundig Tijdschrift 2021

Radiography and/or ultrasonography are the first imaging modalities for diagnosing orthopedic pathology in equine patients. However, some cases, cross-sectional is necessary to reach a more accurate diagnosis. Six cases were retrospectively selected from database of Faculty Veterinary Medicine (Ghent University) illustrate benefits computed tomography (CT) In two CT demonstrated osteomyelitis l...

2016
Muhammed Alshamari Seppo Koskinen

Muhammed Alshamari (2016): Low-dose computed tomography of the abdomen and lumbar spine. Örebro Studies in Medicine 137. Radiography is a common radiologic investigation despite abundant evidence of its limited diagnostic value. On the other hand, computed tomography (CT) has a high diagnostic value and is widely considered to be among the most important advances in medicine. However, CT expose...

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