نتایج جستجو برای: ray vrx ct scanner

تعداد نتایج: 414092  

2015
Hiroaki Hasegawa Masanori Sato Hiroshi Tanaka David O. Carpenter

The purpose of this study was to evaluate scatter radiation dose to the subject surface during X-ray computed tomography (CT) fluoroscopy using the integrated dose ratio (IDR) of an X-ray dose profile derived from an optically stimulated luminescent (OSL) dosimeter. We aimed to obtain quantitative evidence supporting the radiation protection methods used during previous CT fluoroscopy. A multis...

1997
Juichiro Ashi

Three-dimensional high-resolution images of density distributions were obtained on unsplit cores using a medical X-ray computed tomography (CT) scanner. The resolution of CT scanning is about 0.6 mm2 and allows a 5-mm depth for beam width. Electrical resistivity measurements were also conducted to know porosity at high depth resolution after core splitting. Wholeround core samples for this stud...

2002
Gabor Fichtinger Alexandru Patriciu Attila Tanacs Dumitru Mazilu James H. Anderson Ken Masamune Russell H. Taylor Dan Stoianovici

Materials and Methods. The coach-mounted system consists of a seven-degrees-of-freedom, passive mounting arm; a remote-center-of-motion robot; and a motorized, radiolucent needle-insertion device to deliver 17–18-gauge implant and biopsy needles into the prostate with the transperineal route. The robot is registered to the image space with a stereotactic adapter. The surgeon plans and controls ...

خرمیان, داریوش, سیستانی, سروش, هاشمی ملایری, بیژن,

Introduction: Noise and spatial resolution (SR) are the main characteristics of image quality in CT scanning affected by different radiation and technical parameters. One of the important parameters are reconstruction kernels. Different reconstruction kernels are used for noise reduction and/or edge-enhancement purposes. In this study, we investigate some reconstruction kern...

2016
John Marzo Melissa Kluczynski Anthony Notino Leslie Bisson

BACKGROUND Conventional computed tomography (CT) images are routinely used for diagnosing patellofemoral instability and are obtained with the patient in a supine position, nonweightbearing, with the knee in full extension, and with leg muscles relaxed. A new portable extremity cone beam CT (CBCT) scanner has been developed that may allow for more accurate diagnosis, as imaging can be performed...

2011
Mario de Denaro Paola Bregant

BACKGROUND The technologic improvements in Multislice scanners include the increment in the X-ray beam width. Some new CT scanners are equipped with a 320 detector row which allows a longitudinal coverage of 160 mm and a total of 640 slices for a single rotation. When such parameters are used the length of the traditional pencil chamber (10 cm) is no more appropriate to measure the standard wei...

Journal: :Japanese Journal of Radiological Technology 1979

Journal: :medical journal of islamic republic of iran 0
maryam mobini diabetes research center, mazandaran university of medical sciences, sari, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی مازندران (mazandaran university of medical sciences) leyla dehghan division of internal medicine, imam khomeini hospital, mazandaran university of medical sciences, sari, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی مازندران (mazandaran university of medical sciences) gholamali yosefi valiasr hospital, mazandaran university of medical sciences, ghaemshahr, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی مازندران (mazandaran university of medical sciences) reza ali mohammadpour diabetes research center, mazandaran university of medical sciences, sari, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی مازندران (mazandaran university of medical sciences) rohollah abdi mazandaran university of medical sciences, sari, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی مازندران (mazandaran university of medical sciences)

background: bisphosphonates (bps) are used extensively for managing the osteoporosis. there are some controversies on atypical fractures of femur that associated with increase in cortical thickness (ct) and bps' use. in this study, the effects of alendronate consumption were studied on femoral ct as a predictor for atypical fracture.   methods: forty nine post-menopausal women aged 50-70 years ...

2015
Olivier Cros

From an engineering background, it is often believed that the human anatomy has already been fully described. Radiology has greatly contributed to understand the inside of the human body without surgical intervention. Despite great advances in clinical CT scanning, image quality is still related to a limited amount X-ray exposure for the patient safety. This limitation prevents fine anatomical ...

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