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Imaging of myocardial infarction with thermoacoustic tomography: An ex vivo study

100%
Weizhi Q., Wei C., Xi L., Jian R., Lin H.
X-Acoustics: Imaging and Sensing
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2014
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vol. 1
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issue 1
EN
In the present study, we evaluated the feasibility of thermoacoustic tomography (TAT) for imaging of ex vivo mouse hearts with myocardial infarction. A circular scanning TAT system with an unfocused transducer was used to recover the dielectric property distribution of normal andmyocardial infarcted mouse heart tissues. The applicability of this myocardial infarction imaging system was validated using a model of myocardial infarction in two Sprague-Dawley rats and verified through comparison with magnetic resonance imaging (MRI). TAT results not only indicated the location and ischemia and the extent of myocardial ischemia (MI), but also showed good imaging contrast between infarcted and normal myocardium without the use of contrast agent. The experimental results suggest that TAT may provide a unique opportunity to enable real-time precision imaging to determine the site of injury intraoperatively
2
Content available remote

Thermoacoustic imaging of human finger joints and bones

86%
Lin H., Weizhi Q., Yuan Z., Zihui C., Nengzhu Z., Jian R., Dakun L.
X-Acoustics: Imaging and Sensing
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2014
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vol. 1
|
issue 1
EN
In this study, we explore a new application of thermoacoustic tomography (TAT) for imaging human finger joints and bones. Three volunteers’ finger joints and bones were visualized with satisfying image contrast and spatial resolution by a TAT scanner. The recovered TAT images revealed apparent microwave absorption differences between the joint cavity and bone. Beyond the full single finger imaging, a volunteer’s four fingers were clearly and concurrently imaged. To confirm our observations, MRI images of two volunteers’ fingers were performed, and the TAT recovered shape/size of the fingers were consistent with the MRI findings. To further assess the feasibility of TAT for finger joint and bone imaging, we quantitatively calculated the conductivity of a case. This initial study suggests that TAT may be a good candidate for screening, diagnosing, and monitoring treatment of joint and bone diseases.
3
Content available remote

Thermoacoustic tomography: A novel method for early breast tumor detection

73%
Lin H., Weizhi Q., Jinyu X., Yuan Z., Zihui C., Dan W., Jian R., Dakun L.
X-Acoustics: Imaging and Sensing
|
2014
|
vol. 1
|
issue 1
EN
This article presents a comprehensive review on a non-invasive, high resolution and high contrast imaging modality, called thermoacoustic tomography (TAT). Details about the principles, history and future directions of TAT are described.
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