Dental Press J Orthod 42 2010 Sept-Oct;15(5):42-3 * Access www.dentalpress.com.br/journal to read the full article. Editor’s summary The voxel size, the smallest unit of a ConeBeam Computed Tomography (CBCT) image, is related to the definition of tomographic image. The question raised by the authors of this study is whether voxel size can affect radiation dose during CT scanning. Measurement of...

BACKGROUND The seventh Committee on "Biological Effects of Ionizing Radiation" (BEIR VII, 2006) underlines "the need of studies of infants who are exposed to diagnostic radiation because catheters have been placed in their hearts". OBJECTIVE To determine the lifetime attributable risk (LAR) of cancer associated with the estimated cumulative radiological dose in 59 children (42 male, age 2.8+/...

Background: This study aimed to estimate and compare the absorbed dose, lifetime cancer risk and mortalities due to cone-beam computed tomography (CBCT) and panoramic examinations on patients. Materials and Methods: The exposure factors were applied to 332 patients in two age groups (6-10, and ˃18-year-old). The dose-area product (DAP) values were measured for CBCT and panoramic radiographies. ...

Conversion factors, which relate the kerma-area product to effective dose, have been estimated for paediatric cardiac x-ray angiography. Monte Carlo techniques have been used to calculate the conversion factors for a wide range of projection angles for children of five ages and for adults. Correction factors are provided so that the conversion factors can be adjusted for different tube potentia...

BACKGROUND AND OBJECTIVE A novel tiotropium bromide monodose capsule dry powder inhaler (DPI) formulation and device have been developed. The formulation was based on a spray-dried matrix that enhances the aerosolizaton properties, allowing a less active tiotropium metered dose (13 µg/capsule) while maintaining the same delivered dose (10 µg/actuation). This study describes the pharmacokinetic ...

Introduction: The study was undertaken to evaluate the practice of chest radiography using different digital imaging systems and its influence on dose and image quality.  Materials and Methods: The study was carried out in two hospitals from March 2016 to June 2016. Sixty ambulatory patients aged 21 to 60 years who were able to cooperate without difficulty and weighed between 60 to 80 kg were ...

Background: Coronary angiography is a commonly performed diagnostic procedure with life saving benefits for the patient. However, this procedure involves relatively high radiation dose. The purpose of this study was to determine the average effective dose of patients undergoing coronary angiography and to estimate the associated radiation risk in terms of fatal malignancy. Materials an...

Interventional cardiology is a medical specialty widely known to deliver high radiation dose to patients, who may receive, in some complex cases, skin doses over the threshold for deterministic effects. Because several studies have demonstrated large variability in delivered doses, European SENTINEL consortium has carried out a patient dose survey to propose regional Reference Levels (RL) as a ...

The National Patient Dose Database (NPDD) is maintained by the Radiation Protection Division of the Health Protection Agency. The latest review of the database analysed the data collected from 316 hospitals over a 5-year period to the end of 2005. The information supplied amounted to a total of 23 000 entrance surface dose measurements and 57 000 dose–area product measurements for single radiog...