title: Microwave-induced thermal acoustic tomography for breast tumor based on compressive sensing.
abstract: Microwave-induced thermal acoustic tomography (MITAT) is an innovative technique to image biomedical tissues based on their electric properties. It has the advantages of both high contrast and high spatial resolution. Image reconstruction method in MITAT is always a critical issue. In this paper, a CS-MITAT (CS: compressive sensing) imaging method is proposed. Compressive sensing (CS) is a recently developed sparse signal representation and analysis framework which handles medical imaging measurements using low sampling rate or increasing imaging quality. The CS-MITAT imaging method applies CS theory to the MITAT for breast tumor imaging. In this method, an over-complete dictionary is established to make sparse measurements in the spatial domain. This treatment greatly saves measurement time. Simulations and experiments with real breast tumor tissues demonstrate the feasibility and effectiveness of the method. Compared with conventional time reversal mirror method which has been used in MITAT research, CS-MITAT provides the same peak signal-to-noise ratio imaging quality by using significantly fewer acoustic sensor positions or scanning times.
authors.affiliation: School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China.
authors.forename: Xiaozhang
authors.initials: X
authors.lastname: Zhu
authors.forename: Zhiqin
authors.initials: Z
authors.lastname: Zhao
authors.forename: Jinguo
authors.initials: J
authors.lastname: Wang
authors.forename: Jian
authors.initials: J
authors.lastname: Song
authors.forename: Qing Huo
authors.initials: QH
authors.lastname: Liu
mesh_terms: D001940:Breast / Q000033:anatomy & histology / Q000473:pathology; D001943:Breast Neoplasms / Q000473:pathology*; D003198:Computer Simulation; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008872:Microwaves; D019047:Phantoms, Imaging; D012815:Signal Processing, Computer-Assisted; D059629:Signal-To-Noise Ratio; D014054:Tomography / Q000379:methods*