Contrast-Enhanced Spectral Mammography - Physical Aspects and QA
M Yaffe1*, M Hill2, (1) Univ Toronto, Toronto, ON, (2) University of Toronto, Toronto, ONMO-E-217A-1 Monday 3:00:00 PM - 3:50:00 PM Room: 217A
Purpose: To describe the current state of dual energy contrast-enhanced digital mammography, to discuss those aspects of its operation that require evaluation or monitoring and to propose elements of a program for quality assurance of such systems.
Methods: The principles of dual-energy contrast imaging will be discussed and tools and techniques for assessment of performance will be described.
Results: Many of the elements affecting image quality and dose performance in digital mammography (eg noise, system linearity, consistency of x-ray output and detector performance, artifacts) remain important. In addition, the ability to register images can influence the resultant image quality. The maintenance of breast compression thickness during the imaging procedure and calibration of the system to allow quantification of iodine in the breast represent new challenges to quality assurance.
Conclusion: CESM provides a means of acquiring new information regarding tumor angiogenesis and may reveal some cancers that will not be detectable on digital mammography. It may also better demonstrate the extent of disease. The medical physicist must understand the dependence of image quality on physical factors. Implementation of a relevant QA program will be required if the promise of this new modality is to be delivered.