Contrast-enhanced digital mammography (CEDM): imaging modeling, computer simulations, and phantom study

Biao Chen; Zhenxue Jing; Andrew Smith

doi:10.1117/12.595747

20 April 2005 Contrast-enhanced digital mammography (CEDM): imaging modeling, computer simulations, and phantom study

Biao Chen, Zhenxue Jing, Andrew Smith

Proceedings Volume 5745, Medical Imaging 2005: Physics of Medical Imaging; (2005) https://doi.org/10.1117/12.595747
Event: Medical Imaging, 2005, San Diego, California, United States

Abstract

Contrast enhanced digital mammography (CEDM), which is based upon the analysis of a series of x-ray projection images acquired before/after the administration of contrast agents, may provide physicians critical physiologic and morphologic information of breast lesions to determine the malignancy of lesions. This paper proposes to combine the kinetic analysis (KA) of contrast agent uptake/washout process and the dual-energy (DE) contrast enhancement together to formulate a hybrid contrast enhanced breast-imaging framework. The quantitative characteristics of materials and imaging components in the x-ray imaging chain, including x-ray tube (tungsten) spectrum, filter, breast tissues/lesions, contrast agents (non-ionized iodine solution), and selenium detector, were systematically modeled. The contrast-noise-ration (CNR) of iodinated lesions and mean absorbed glandular dose were estimated mathematically. The x-ray techniques optimization was conducted through a series of computer simulations to find the optimal tube voltage, filter thickness, and exposure levels for various breast thicknesses, breast density, and detectable contrast agent concentration levels in terms of detection efficiency (CNR²/dose). A phantom study was performed on a modified Selenia full field digital mammography system to verify the simulated results. The dose level was comparable to the dose in diagnostic mode (less than 4 mGy for an average 4.2 cm compressed breast). The results from the computer simulations and phantom study are being used to optimize an ongoing clinical study.

Citation Download Citation

Biao Chen, Zhenxue Jing, and Andrew Smith "Contrast-enhanced digital mammography (CEDM): imaging modeling, computer simulations, and phantom study", Proc. SPIE 5745, Medical Imaging 2005: Physics of Medical Imaging, (20 April 2005); https://doi.org/10.1117/12.595747

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KEYWORDS

Breast

X-rays

Iodine

Copper

X-ray imaging

Digital mammography

Computer simulations

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