Shanxiang Zhang, Xiaoyu Tang, Huan Qin. Research Progress and Prospect of Microwave-Induced Thermoacoustic Imaging Technology[J]. Laser & Optoelectronics Progress, 2022, 59(6): 0617004
- Laser & Optoelectronics Progress
- Vol. 59, Issue 6, 0617004 (2022)
![Magnetron mode microwave source.(a) Schematic of the magnetron modulation mode; (b) typical magnetron modulation mode microwave generator[78]; (c) top view and side view of the miniaturized microwave generator[115]; (d) schematic of a small MTAI system115]](/richHtml/lop/2022/59/6/0617004/img_1.jpg)
Fig. 1. Magnetron mode microwave source.(a) Schematic of the magnetron modulation mode; (b) typical magnetron modulation mode microwave generator[78]; (c) top view and side view of the miniaturized microwave generator[115]; (d) schematic of a small MTAI system115]
![High voltage discharge mode microwave source.(a) Schematic of high voltage discharge mode; (b) schematic of USMP experimental device[74]](/richHtml/lop/2022/59/6/0617004/img_2.jpg)
Fig. 2. High voltage discharge mode microwave source.(a) Schematic of high voltage discharge mode; (b) schematic of USMP experimental device[74]
![Continuous modulation mode microwave source.(a) Schematic of continuous modulation mode; (b) schematic of experimental apparatus for observing TA effect and TAR effect induced by monopulse and multi-pulse microwave sources[90]](/Images/icon/loading.gif){kind=icon}
Fig. 3. Continuous modulation mode microwave source.(a) Schematic of continuous modulation mode; (b) schematic of experimental apparatus for observing TA effect and TAR effect induced by monopulse and multi-pulse microwave sources[90]
Fig. 4. Experimental diagram of unit ring scanning endoscopy imaging system and resolution[118]
Fig. 5. Structure diagram and physical diagram of ring array acquisition system[77]
Fig. 6. Multivariate data acquisition system. (a) MTAI system composed of concave array detectors; (b) flexible array detector[121]
Fig. 7. FP thermoacoustic detector. (a) Structure of FP thermoacoustic detector[122]; (b) lateral resolution of FP thermoacoustic detector[123]; (c) axial resolution of FP thermoacoustic detector[123]
Fig. 8. Image reconstruction process of thermoacoustic imaging
Fig. 9. Schematic of different imaging algorithms. (a) Schematic of BP algorithm; (b) schematic of HDCS-MTAI algorithm[124]; (c) schematic of 3D CS-MTAI algorithm[125]
Fig. 10. MTAI of mammary gland. (a) Schematic of a breast thermoacoustic scanner[26]; (b) thermoacoustic imaging of a series of coronal and sagittal sections of the female breast, arrows show a large lobulated enhanced mass[26]; (c) thermoacoustic imaging of the left breast and right breast of human[26]; (d) in vitro thermoacoustic imaging of tumor-bearing ewe breast[121]
Fig. 11. MTAI technique for brain imaging of rats in vivo[129]. (a) Thermoacoustic imaging system of rat brain structure; (b) thermoacoustic imaging results of rat brain structure
Fig. 12. MTAI technique for cerebral hemorrhage imaging[130]. (a) MTAI imaging system for GMH in mice; (b)-(e) thermoacoustic imaging of GMH in mice; (f)-(i) histological sections of mouse brain; (k)-(n) MTAI images after injection of 5 μL blood into the left ventricle; (j) indication of the location of blood injection; (o) histological images of Fig.12 (j); (p) TA signal curve along the dotted line shown in Fig.12 (l)
Fig. 13. MTAI system and microwave illumination methods[131]. (a) Schematic of the MTAI system; (b) pyramidal horn antenna; (c) parallel in-phase microwave illumination; (d) parallel anti-phase microwave illumination
Fig. 15. Schematic of different thermoacoustic probes. (a) Schematic of anti-Gall-Fe3O4 nanoparticles to enhance MTAI in nude mouse model with pancreatic cancer[132]; (b) schematic of TA signal generation mechanism in BSA-GO nanoparticles[141]; (c) schematic of TA signal and shock wave generation mechanism in defect-rich TiN NPs[142]; (d) UHF-RF-acoustic contrast preparation and in vitro imaging[143]
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Table 1. Microwave source types studied by each group
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Table 2. Thermoacoustic sensor types studied by each group
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