actual focal spot automatic exposure control comparator coulomb/kilogram detector effective focal spot focal spot blooming grid latitude grid uniformity half-value layer high-frequency homogenous phantom ion chamber kilowatt rating Law of Reciprocity linear tomography line focus principle linearity mobile x-ray generator objective plane photodetector pluridirectional tomography portable x-ray g...

INTRODUCTION The advances in genomic analysis technologies have conducted to the development of new diagnostic tests in the clinical practice. As well as it happened in other diagnostic fields, the knowledge of the main flaws affecting genetic investigation will facilitate the application of the results. METHODS We included 44 original articles that evaluate diagnostic exactitude of genetic a...

BACKGROUND Mammography is a radiological diagnostic method which relies on an X-ray examination of breasts and is a process involving the use of low-dose amplitude-X-rays (usually around 0.7 mSv). Combining the use of small doses and high quality images requires extensive quality protocols, part of them being included in regulations adopted by the Minister of Health. AIM The aim of this study...

Maintaining quality, competitiveness and innovation in global health technology is a constant challenge for manufacturers, while affordability, access and equity are challenges for governments and international agencies. In this paper we discuss these issues with reference to rapid diagnostic tests for malaria. Strategies to control and eliminate malaria depend on early and accurate diagnosis. ...

Biological experiments are usually set up in technical replicates (duplicates or triplicates) in order to ensure reproducibility and, to assess any significant error introduced during the experimental process. The first step in biological data analysis is to check the technical replicates and to confirm that the error of measure is small enough to be of no concern. However, little attention has...

Genetic data are often critical for defining populations for management purposes (e.g., identifying geographic boundaries or diagnostic characters for genetically discrete subunits) but can be called into question by both scientific and legal review. This can result in reversed or delayed implementation of management actions. We discuss methods for data quality control and quality analysis and ...

A deformable phantom was developed to aid in quality assurance for dynamic imaging and targeting techniques in radiation therapy. Made of simple materials combined with standard components for imaging and motion experiments, this phantom can be relatively easily constructed and used for both diagnostic imaging and dosimetry. Repeat imaging studies indicate that the phantom meets criteria of rel...