For mammography research, the Zhou Laboratory uses Rachel anthropomorphic breast phantom and BR12 to find the optimal acquisition techniques for the optimal automatic exposure control (AEC).
|Lesion (mass and microcalcification) simulation on the Rachel phantom with 5 cm thickness. The left and right images corresponding to AEC Table 0 and AEC Table 1, respectively. Reprinted from J Xray Sci Technol, Vol. 22(3), Zhou Y, Scott II A, Allahverdian J, Frankel, S. Evaluation of automatic exposure control options in digital mammography. Pages 377-394. Copyright 2014, with permission from IOS Press.|
Both the figure-of-merit calculation and visual comparison from the lesion simulation on the breast showed automatic exposure control Table 1 as a better option, especially for microcalcification detection.
|Realistically shaped abdomen phantom with the low contrast image quality insert. The insert contains one- and two-percent targets ranging from 1.8 mm to 7 mm.|
On the research of computed tomography, the Zhou Lab has identified the relationship of minimum detectable contrast to lesion size and patient dose using a power law model and incorporated the patient size dependency in the proportionality factor.
|Examples of the minimum detectable contrast versus the target (lesion) size and dose for the small and large phantoms.|