Microbubbles and ultrasound: a bird's eye view

Area of Science:

• Biomedical Engineering
• Ultrasound Technology
• Nanotechnology

Background:

• Gas-filled microbubbles were first utilized as ultrasound contrast agents due to their blood-like rheology.
• Their intravascular behavior allows for quantification of tissue transit using ultrasound.

Purpose of the Study:

• To review the diverse applications of microbubbles in ultrasound-based diagnostics and therapeutics.
• To highlight advancements in molecular imaging, drug/gene delivery, and bioeffect induction.

Main Methods:

• Review of existing literature on microbubble applications.
• Discussion of ultrasound principles for microbubble detection and manipulation.
• Analysis of ligand incorporation for molecular targeting.

Main Results:

• Microbubbles are effective ultrasound contrast agents.
• Surface-modified microbubbles enable molecular imaging of vasculature.
• Ultrasound-induced microbubble disruption facilitates targeted drug and gene delivery.
• Localized microbubble disruption can induce angiogenesis.

Conclusions:

• Microbubbles represent a multimodal platform for advanced ultrasound applications.
• Future research directions include optimizing targeted delivery and therapeutic bioeffects.