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Updated: Jun 2, 2026

Introduction to the Ultrasound Targeted Microbubble Destruction Technique

Introduction to the Ultrasound Targeted Microbubble Destruction Technique

Published on: June 12, 2011

A simple method for quantifying ultrasound-triggered microbubble destruction.

Shuo-Hui Hung¹, Chih-Kuang Yeh, Tung-Hu Tsai

¹Department of Biomedical Imaging and Radiological Sciences, National Yang-Ming University, Taipei, Taiwan.

Ultrasound in Medicine & Biology

|May 7, 2011

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Ultrasound-triggered microbubble destruction (UTMD) monitoring was assessed using peripheral vessel signal intensity. Higher mechanical index (MI) values effectively quantified microbubble destruction, indicating this method

Area of Science:

Biomedical Engineering
Diagnostic Ultrasound
Pharmacology

Background:

Ultrasound-triggered microbubble destruction (UTMD) is crucial for targeted drug delivery.
Real-time monitoring of UTMD lacks a standardized gold standard.
Clinical diagnostic ultrasound scanners offer potential for UTMD quantification.

Purpose of the Study:

To quantify microbubble destruction using a clinical diagnostic ultrasound scanner.
To evaluate the impact of varying mechanical index (MI) values on microbubble destruction.
To establish peripheral vessel signal intensity as a measure of systemic microbubble concentration.

Main Methods:

Utilized Sprague-Dawley rats and SonoVue contrast agent.
Recorded time-intensity curves (TIC) in peripheral vessels to determine signal saturation.

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Introduction to the Ultrasound Targeted Microbubble Destruction Technique

Introduction to the Ultrasound Targeted Microbubble Destruction Technique

Published on: June 12, 2011

Multi-timescale Microscopy Methods for the Characterization of Fluorescently-labeled Microbubbles for Ultrasound-Triggered Drug Release

Multi-timescale Microscopy Methods for the Characterization of Fluorescently-labeled Microbubbles for Ultrasound-Triggered Drug Release

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Applied different MI values (0.2, 0.6, 1.0) to induce and quantify UTMD.

Main Results:

Higher MI values (0.6 and 1.0) significantly reduced TIC area under the curve and enhancement duration.
Peak signal intensity showed a slight, non-significant decrease post-sonication at higher MIs.
Pharmacokinetic analysis revealed faster clearance and shorter half-life of SonoVue at MI 0.6 and 1.0.

Conclusions:

Sonographic signal intensity in peripheral vessels is a feasible indicator of systemic microbubble concentration.
This method can quantify ultrasound-triggered microbubble destruction.
Diagnostic ultrasound provides a viable tool for real-time UTMD monitoring.