The following references explain the rationale and methods used by Dental Radiology QA. Better image quality through science.

Quality assurance phantom for digital dental imaging. This journal article reviews some general principles of quality assurance as it relates to digital intraoral radiography. It also describes the development, design, utilization and validation of a novel radiographic phantom (DDQA) for image quality optimization and quality assurance for digital dental imaging. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2011:112:632-639

 Evaluation of image quality parameters of representative intraoral digital radiographic systems. This journal article describes the use of the Digital Dental Quality Assurance (DDQA) phantom to objectively analyze and compare 20 different digital intraoral imaging systems. This is the most comprehensive objective analysis of imaging parameters (contract/detail resolution, spatial resolution and dynamic range) for commercially available digital dental intraoral imaging systems every reported in the dental literature. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2013:116:774-783

Digital intraoral radiographic quality assurance. Working with a representative sample of private practice dental offices, this study examined and evaluated the entire digital intraoral radiographic system used in each operatory. General Dentistry September/October 2014

Acceptance Testing and Quality Control of Dental Imaging Equipment. This report developed by the American Association of Physicists in Medicine (AAPM) provides clear and concise guidelines for developing a quality assurance program for dental imaging equipment. Recommendations for specific parameter evaluations and practical procedures for quality assurance evaluations of dental imaging equipment are described.  AAPM TG 175 Report

Quality Assurance for Digital Intra-Oral Radiographic Systems. This technical report developed by the American Dental Association (ADA) is intended to be used by dental professionals that perform intra-oral radiography using digital radiographic systems. The purpose of this document is to establish practical protocols to ensure adequate quality assurance for digital intra-oral radiography. The report covers quality assurance of the intra-oral x-ray source, the image display device (computer/monitor and display-software), and the digital image acquisition device (solid-state sensor or PSP imaging plate and scanner, and associated acquisition-software). ADA TR 1094 Report