Abstract ID: 17261 Title: Radiography: 2D and 3D Metrics of Performance Towards Quality Index
Digital radiography has gained widespread usage essentially replacing analog techniques
in most clinics in the developed world. While the technology has correspondingly
matured over many decades, the variety in the technological offerings has also increased
ranging from computed radiography, to flat-panel technology, to CCD and CMOS based
sensors. Newest offerings include devices that can provide imaging signals wirelessly
enhancing the portability and retrofit use of the imaging devices. New dynamic detectors
have also enabled new image acquisition techniques including dual-energy and
tomosynthesis, increasing the dimensionality of the acquired image data. With the
increased complexity and variety, there is a need to have established performance
assessment techniques that provide standard means to understand and relate image
quality metrics across variety of devices and technologies. This presentation offers a
comprehensive tutorial for two and three-dimensional image quality evaluation of digital
radiographic systems. Topics covered include 2D and 3D resolution measurements,
noise characterization, DQE assessments, and DQE assessment in the presence of scatter
and magnification (effective DQE, eDQE). The presentation further attempts to define a
comprehensive quality index that may serve as a basis of imaging quality assessment and
optimization.
Learning objectives:
1. To understand methods for 2D and 3D resolution measurements.
2. To understand the basics for DQE and eDQE measurement techniques.
3. To relate physical metrics of performance to clinical image quality.