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Blood speed imaging with an intraluminal array.

J R Crowe¹, B M Shapo, D N Stephens

¹Dept. of Electr. Eng. and Comput. Sci., Michigan Univ., Ann Arbor, MI, USA.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

|February 2, 2008

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This study introduces a novel method using an FIR filter bank to estimate blood speed in ultrasound imaging, particularly for intravascular applications where Doppler is not feasible. The technique offers a hardware-free solution for enhanced blood flow visualization.

Area of Science:

Medical imaging
Biomedical engineering
Ultrasound technology

Background:

Doppler processing is often not feasible in specific ultrasound applications like side-looking intravascular imaging.
Alternative methods are needed to estimate blood speed in such scenarios.
Decorrelation methods offer a potential solution for blood speed estimation.

Purpose of the Study:

To present a new method for measuring relative blood speed using an FIR filter bank.
To estimate temporal decorrelation rates for blood speed assessment.
To demonstrate the utility of this method in intravascular imaging applications.

Main Methods:

Utilized a Finite Impulse Response (FIR) filter bank to estimate temporal decorrelation rates.
Implemented the method within a commercially available ultrasound imaging system without requiring additional hardware.

Related Experiment Videos

Validated the system through simulations and experiments using an intraluminal scanner for coronary artery imaging.

Contrasted the FIR filter bank approach with previous decorrelation methods.

Main Results:

The FIR filter bank method successfully estimated relative blood speed.
The system demonstrated feasibility for intravascular imaging, specifically in coronary arteries.
Real-time color flow images from a pig model further validated the method's utility.
The FIR filter bank approach showed comparable or improved performance against prior methods.

Conclusions:

The presented FIR filter bank method provides a viable alternative for blood speed estimation when Doppler is not possible.
This technique is implementable in existing ultrasound systems, offering a cost-effective solution.
The study confirms the method's effectiveness for intravascular imaging and blood flow assessment in coronary arteries.