Ferromagnetic Ultrasound Microbubbles Contrast Agent

Kawan Soetanto*, Hiroshi Watarai

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)


Microbubbles have attracted attention as ultrasonic contrast agents because their ultrasonic scattering property is excellent in comparison with other ultrasonic contrast agents. In the development of ultrasound contrast agent, the main difficulties accounted are the making of small microbubbles less than 10 μm and the elongation of the lifetime of microbubbles. A new ultrasonic contrast agent, which is microbubbles typed coating by surfactant, has been developed. The contrast images produced by different-sized microbubbles contrast agents are studied quantitatively. Furthermore, a ferromagnetic ultrasound contrast agent was also studied for its potential as a Drug Delivery System (DDS). In this paper, a new ultrasonic contrast agent for the Drug Delivery System will be discussed. Ferromagnetic materials are placed on the surfaces of the surfactant microbubbles developed in our laboratory for the above purpose. Multivalent ions such as calcium ions are used to put the ferromagnetic materials on the surfaces of the microbubbles. It is confirmed that the developed magnetic microbubbles could be lead by a permanent magnet. The performance of the magnetic microbubbles is evaluated by measuring the time dependence of the attenuation constant as one of their acoustic properties.

Original languageEnglish
Pages (from-to)1226-1229
Number of pages4
JournalAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Publication statusPublished - 2003
EventA New Beginning for Human Health: Proceddings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Cancun, Mexico
Duration: 2003 Sept 172003 Sept 21


  • Acoustic contrast agent
  • DDS
  • Magnetic carbon
  • Magnetic microbubbles
  • Magnetite

ASJC Scopus subject areas

  • Signal Processing
  • Biomedical Engineering
  • Computer Vision and Pattern Recognition
  • Health Informatics


Dive into the research topics of 'Ferromagnetic Ultrasound Microbubbles Contrast Agent'. Together they form a unique fingerprint.

Cite this