background: the radiation doses resulting from diagnostic x-ray examinations are routinely measured in terms of entrance surface dose (esd) and effective dose (ed). in this study, for the purpose of radiation protection, the radiation doses received from digital chest x-ray examination were evaluated in terms of esd and ed. material and methods: the ed was calculated by using the mcnp monte car...

Background and Aim: Cone beam computed tomography (CBCT) produces high-quality data in periodontal diagnosis and treatment planning. The aim of this study was to compare the accuracy of CBCT with intraoral digital and conventional radiography in the measurement of periodontal bone defects.  Methods and Materials: In this diagnostic research, two hundred and eighteen artificial osseous d...

UNLABELLED To assess the cost-effectiveness of various strategies for the diagnostic management of clinically suspected scaphoid fracture, a decision-analytic model was built to evaluate three strategies and to compare them with a (clairvoyant) reference diagnostic management strategy. METHODS Evaluated strategies were: (A) repeated radiography up to 2 wk; (B) repeat radiography up to 6 wk; a...

In October 2010, the National Cancer Institute (NCI) announced that patients who were randomly assigned to screening with low-dose computed tomography (CT) had fewer deaths from lung cancer than did patients randomly assigned to screening with chest radiography. The first report of the NCI-sponsored National Lung Screening Trial (NLST) in a peer-reviewed medical journal appears in this issue of...