Research Areas

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.