Adaptive compensation of TGC effects in contrast-free ultrasensitive ultrasound Doppler imaging for improved resistivity index map visualization

2021 ◽  
Author(s):  
Lenin Chinchilla ◽  
Thomas Frappart ◽  
Christophe Fraschini ◽  
Jean-Michel Correas ◽  
Jean-Luc Gennisson
Keyword(s):  
Doppler Imaging ◽  
Adaptive Compensation ◽  
Resistivity Index ◽  
Ultrasound Doppler ◽  
Map Visualization

scholarly journals Ultrasound Doppler-guided real-time navigation of a magnetic microswarm for active endovascular delivery

2021 ◽  
Vol 7 (9) ◽  
pp. eabe5914 ◽  
Author(s):  
Qianqian Wang ◽  
Kai Fung Chan ◽  
Kathrin Schweizer ◽  
Xingzhou Du ◽  
Dongdong Jin ◽  
...  
Keyword(s):  
Blood Flow ◽  
Real Time ◽  
Targeted Delivery ◽  
Ex Vivo ◽  
Dynamic Environments ◽  
Doppler Imaging ◽  
Great Promise ◽  
Mean Velocity ◽  
Ultrasound Doppler ◽  
Flowing Blood

Swarming micro/nanorobots offer great promise in performing targeted delivery inside diverse hard-to-reach environments. However, swarm navigation in dynamic environments challenges delivery capability and real-time swarm localization. Here, we report a strategy to navigate a nanoparticle microswarm in real time under ultrasound Doppler imaging guidance for active endovascular delivery. A magnetic microswarm was formed and navigated near the boundary of vessels, where the reduced drag of blood flow and strong interactions between nanoparticles enable upstream and downstream navigation in flowing blood (mean velocity up to 40.8 mm/s). The microswarm-induced three-dimensional blood flow enables Doppler imaging from multiple viewing configurations and real-time tracking in different environments (i.e., stagnant, flowing blood, and pulsatile flow). We also demonstrate the ultrasound Doppler–guided swarm formation and navigation in the porcine coronary artery ex vivo. Our strategy presents a promising connection between swarm control and real-time imaging of microrobotic swarms for localized delivery in dynamic environments.

Pulpal Blood Flow Measurement with Ultrasound Doppler Imaging

2010 ◽  
Vol 36 (3) ◽  
pp. 419-422 ◽  
Author(s):  
Min-Jung Yoon ◽  
Euiseong Kim ◽  
Seoung-Jong Lee ◽  
Young-Min Bae ◽  
Sergey Kim ◽  
...  
Keyword(s):  
Blood Flow ◽  
Flow Measurement ◽  
Doppler Imaging ◽  
Blood Flow Measurement ◽  
Ultrasound Doppler ◽  
Pulpal Blood Flow

Magnetic Navigation of Collective Cell Microrobots in Blood Under Ultrasound Doppler Imaging

2021 ◽  
pp. 1-12
Author(s):  
Qianqian Wang ◽  
Yuan Tian ◽  
Xingzhou Du ◽  
Ho Ko ◽  
Bonaventure Yiu Ming Ip ◽  
...  
Keyword(s):  
Doppler Imaging ◽  
Magnetic Navigation ◽  
Ultrasound Doppler

Simultaneous Fetal Magnetocardiography and Ultrasound/Doppler Imaging

2007 ◽  
Vol 54 (6) ◽  
pp. 1167-1171 ◽  
Author(s):  
Hui Zhao ◽  
Mingli Chen ◽  
Barry D. Van Veen ◽  
Janette F. Strasburger ◽  
Ronald T. Wakai
Keyword(s):  
Doppler Imaging ◽  
Ultrasound Doppler ◽  
Fetal Magnetocardiography

A Preclinical Study to Explore Vasculature Differences Between Primary and Recurrent Tumors Using Ultrasound Doppler Imaging

2013 ◽  
Vol 39 (5) ◽  
pp. 860-869 ◽  
Author(s):  
Jia-Jiun Chen ◽  
Sheng-Yung Fu ◽  
Chi-Shiun Chiang ◽  
Ji-Hong Hong ◽  
Chih-Kuang Yeh
Keyword(s):  
Preclinical Study ◽  
Doppler Imaging ◽  
Ultrasound Doppler ◽  
Recurrent Tumors

Ultrasound Doppler Imaging and Navigation of Collective Magnetic Cell Microrobots in Blood

2021 ◽  
Author(s):  
Qianqian Wang ◽  
Yuan Tian ◽  
Xingzhou Du ◽  
Kai-Fung Chan ◽  
Li Zhang
Keyword(s):  
Doppler Imaging ◽  
Ultrasound Doppler

Vector Doppler imaging of a spinning disc ultrasound Doppler phantom

2006 ◽  
Vol 32 (7) ◽  
pp. 1037-1046 ◽  
Author(s):  
Oliver D. Kripfgans ◽  
Jonathan M. Rubin ◽  
Anne L. Hall ◽  
J. Brian Fowlkes
Keyword(s):  
Doppler Imaging ◽  
Ultrasound Doppler ◽  
Spinning Disc
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