Molecular photoacoustic imaging using gold nanoparticles as a contrast agent

  • Chulhong Kim
  • , Eun Chul Cho
  • , Jingyi Chen
  • , Kwang Hyun Song
  • , Leslie Au
  • , Christopher P. Favazza
  • , Qiang Zhang
  • , Claire M. Cobley
  • , Younan Xia
  • , Lihong V. Wang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Gold nanoparticles have received much attention due to their potential diagnostic and therapeutic applications. Gold nanoparticles are attractive in many biomedical applications because of their biocompatibility, easily modifiable surfaces for targeting, lack of heavy metal toxicity, wide range of sizes (35-100 nm), tunable plasmonic resonance peak, encapsulated site-specific drug delivery, and strong optical absorption in the near-infrared regime. Specifically, due to their strong optical absorption, gold nanoparticles have been used as a contrast agent for molecular photoacoustic (PA) imaging of tumor. The plasmonic resonance peak of the gold nanocages (AuNCs) was tuned to the near-infrared region, and the ratio of the absorption cross-section to the extinction cross-section was approximately ~70%, as measured by PA sensing. We used PEGylated gold nanocages (PEG-AuNCs) as a passive targeting contrast agent on melanomas. After 6-h intravenous injection of PEG-AuNCs, PA amplitude was increased by ∼14 %. These results strongly suggest PA imaging paired with AuNCs is a promising diagnostic tool for early cancer detection.

Original languageEnglish
Title of host publicationPhotons Plus Ultrasound
Subtitle of host publicationImaging and Sensing 2010
PublisherSPIE
ISBN (Print)9780819479600
DOIs
StatePublished - 11 Feb 2011
Externally publishedYes
EventPhotons Plus Ultrasound: Imaging and Sensing 2010 - San Francisco, CA, United States
Duration: 24 Jan 201026 Jan 2010

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume7564
ISSN (Print)1605-7422

Conference

ConferencePhotons Plus Ultrasound: Imaging and Sensing 2010
Country/TerritoryUnited States
CitySan Francisco, CA
Period24/01/1026/01/10

Keywords

  • B16 melanoma
  • Gold nanoparticles
  • Molecular imaging
  • Photoacoustic tomography

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