نتایج جستجو برای: diagnostic reference level drl
تعداد نتایج: 1573319 فیلتر نتایج به سال:
OBJECTIVE Despite the obligatory recording of doses administered to patients during CT scans, this data is not easily accessible. The objective of this study was to implement and validate a computerised automated dose-recording system for CT scans, for a single radiology department. MATERIAL AND METHODS Every patient undergoing a CT scan in our department over a one-year period was included i...
Introduction The purpose was to determine if an age based, local diagnostic reference level for paediatric skeletal surveys could be established using retrospective data. Methods All children below two years of referred a primary survey as result suspected physical abuse during 2017 or 2018 (n = 45) were retrospectively included from large Danish university hospital. protocol total 33 images. D...
In Drosophila, odor information received by olfactory receptor neurons (ORNs) is processed by glomeruli, which are organized in a stereotypic manner in the antennal lobe (AL). This glomerular organization is regulated by Wnt5 signaling. In the embryonic CNS, Wnt5 signaling is transduced by the Drl receptor, a member of the Ryk family. During development of the olfactory system, however, it is a...
local-reference patient dose evaluation in conventional radiography examinations in mazandaran, iran
background: the most efficient application of ionizing radiation is serving medical purposes and using this radiation has caused people to learn that artificial sources of radiation exposure among these resources can be of highest exposure rate. objective: the present study is aimed at initially establishing a baseline for local-reference dose level in mazandaran, iran in 12 projections of th...
In ‘Comments on Theeuwes and Riemersma’s Revisit of Daytime Running Lights’ Williams and Farmer ( 1996) comment on a paper we published in Accident Analysis and Prevention. In this paper we show that the original claim by Andersson and Nilsson ( 198 1) that the nationwide implementation of Daytime Running Lights (DRL) in Sweden resulted in a reduction of multiple daytime accidents was not warra...
OBJECTIVE Aiming at contributing to the knowledge on doses in computed tomography (CT), this study has the objective of determining dosimetric quantities associated with pediatric abdominal CT scans, comparing the data with diagnostic reference levels (DRL). MATERIALS AND METHODS The study was developed with a Toshiba Asteion single-slice CT scanner and a GE BrightSpeed multi-slice CT unit in...
BACKGROUND Currently available tools for identifying individuals at high risk of type 2 diabetes can be invasive, costly and time consuming. This study aims to develop and validate a self-assessment tool for identifying individuals at high risk of type 2 diabetes in the Chinese general population. METHODS A cross-sectional survey was conducted from 2000 to 2001 in a nationally representative ...
PURPOSE To assess patient radiation doses during cerebral angiography and embolization of intracranial aneurysms across multi-centers and propose a diagnostic reference level (DRL). MATERIALS AND METHODS We studied a sample of 490 diagnostic and 371 therapeutic procedures for intracranial aneurysms, which were performed at 23 hospitals in Korea in 2015. Parameters including dose-area product ...
Differential reinforcement of low rate responding (DRL) can be defined as withholding reinforcement until probability of a target behaviour has decreased to a particular criterion. Typically, the DRL lowers the overall rate of a specific target response by incrementally increasing the time interval between responses and delivering reinforcement contingent upon a response occurring at or above t...
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