Introduction: The Diagnostic reference levels (DRLs) play a critical role in the optimization of radiation dose especially, in some conditions like pediatrics. They are useful indicators by which the radiologists can be aware of delivered excess radiation doses to the patients, and take corrective actions if necessary. In order to meet some requirements for establishing the nat...

We assess dose and image quality of a state-of-the-art angiographic C-arm system (Axiom Artis dTA, Siemens Medical Solutions, Forchheim, Germany) for three-dimensional neuro-imaging at various dose levels and tube voltages and an associated measurement method. Unlike conventional CT, the beam length covers the entire phantom, hence, the concept of computed tomography dose index (CTDI) is not th...

In this work management of pediatric patients doses for Computed Tomography examinations have been studied at KorleBu Teaching Hospital. The assessment of the management system involved: Estimation of Weighted Computed Tomography Dose Index (CTDIw), Volumetric Computed Tomography Dose Index (CTDIvol), Dose Length Product (DLP) and Effective dose (E); and Evaluation of quality assurance and qual...

Computed tomography (CT) images contribute to high-quality medical diagnosis, but radiation dose can be quite high, requiring accurate assessment. CT index (CTDI) was developed for dosimetric purposes, scanners operated exclusively in axial mode. Nowadays, CTDI underestimate patient helical exams. AAPM report TG111 (2010) suggested a new metric which the patient's is obtained from profiles cons...

Introduction: Nowadays, the demand for CT-scan is increased, and this issue has become a critical subject in radiation protection, because of the risk of cancer especially for children. The quality assurance of CT images is a necessary factor that can effect on children dose. The CT dose index is an important dosimetry index in CT-Scan dosimetry. The purpose of this study is t...

Background: The Diagnostic reference levels (DRLs) play a critical role in the optimization of radiation dose especially, in some conditions like pediatrics. They are useful indicators by which the radiologists can be aware of delivered excess radiation doses to the patients, and take corrective actions if necessary. In order to meet some requirements for establishing the national computed tomo...

The purpose of this paper is to present a comparison of doses delivered to the patients when dealing with intra-oral, panoramic and CT dental examinations. The technology progress will be discussed from a dose and an image quality point of view. DAP values were measured for two intra-oral systems using speed D and E/F dental films, and a digital system in two different acquisition modes (CCD te...

Image-guided techniques for radiation therapy have improved the precision of radiation delivery by sparing normal tissues. Cone-beam computed tomography (CBCT) has emerged as a key technique for patient positioning and target localization in radiotherapy. Here, we investigated the imaging radiation dose delivered to radiosensitive organs of a patient during CBCT scan. The 4D extended cardiac-to...