Fast 3D Pulse-Echo Ultrasound Imaging Using Diffraction Tomography

2012 ◽  
Vol 57 (SI-1 Track-B) ◽  
Author(s):  
T. Jansen ◽  
M. F. Schiffner ◽  
G. Schmitz
Keyword(s):  
Ultrasound Imaging ◽  
Diffraction Tomography ◽  
Pulse Echo

scholarly journals A High Frequency Geometric Focusing Transducer Based on 1-3 Piezocomposite for Intravascular Ultrasound Imaging

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Xiaohua Jian ◽  
Zhile Han ◽  
Pengbo Liu ◽  
Jie Xu ◽  
Zhangjian Li ◽  
...  
Keyword(s):  
Intravascular Ultrasound ◽  
Ultrasound Imaging ◽  
High Frequency ◽  
High Sensitivity ◽  
Single Element ◽  
Small Aperture ◽  
Intravascular Ultrasound Imaging ◽  
Intensity Field ◽  
Imaging Resolution ◽  
Pulse Echo

Due to the small aperture of blood vessel, a considerable disadvantage to current intravascular ultrasound (IVUS) imaging transducers is that their lateral imaging resolution is much lower than their axial resolution. To solve this problem, a single-element, 50 MHz, 0.6 mm diameter IVUS transducer with a geometric focus at 3 mm was proposed in this paper. The focusing transducer was based on a geometric-shaped 1-3 piezocomposite. The impedance/phase, pulse echo, acoustic intensity field, and imaging resolution of the focusing transducer were tested. For comparison, a flat IVUS transducer with the same diameter and 1-3 piezocomposite was made and tested too. Compared with their results, the fabricated focusing transducer exhibits broad bandwidth (107.21%), high sensitivity (404 mV), high axial imaging resolution (80 μm), and lateral imaging resolution (100 μm). The experimental results demonstrated that the high frequency geometric focusing piezocomposite transducer is capable of visualizing high axial and lateral resolution structure and improving the imaging quality of related interventional ultrasound imaging.

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