Targeted PARACEST nanoparticle contrast agent for the detection of fibrin
| Autor: | Shelton D. Caruthers, J. David Robertson, Patrick M. Winter, Garry E. Kiefer, Gregory M. Lanza, Junjie Chen, Carolyn E. Buff, Samuel A. Wickline, Christopher Adair, Patrick J. Gaffney, Phillip S. Athey, Kejia Cai |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Fibrin
Magnetic Resonance Spectroscopy biology Chemistry media_common.quotation_subject Contrast Media Nanoparticle Pulse sequence Nuclear magnetic resonance spectroscopy Image Enhancement Magnetic Resonance Imaging Article Nuclear magnetic resonance biology.protein Nanoparticles Bound water Contrast (vision) Radiology Nuclear Medicine and imaging Chelation Particle Size Molecular imaging media_common |
| Zdroj: | Magnetic Resonance in Medicine. 56:1384-1388 |
| ISSN: | 1522-2594 0740-3194 |
| DOI: | 10.1002/mrm.21093 |
| Popis: | A lipid-encapsulated perfluorocarbon nanoparticle molecular imaging contrast agent that utilizes a paramagnetic chemical exchange saturation transfer (PARACEST) chelate is presented. PARACEST agents are ideally suited for molecular imaging applications because one can switch the contrast on and off at will simply by adjusting the pulse sequence parameters. This obviates the need for pre- and postinjection images to define contrast agent binding. Spectroscopy (4.7T) of PARACEST nanoparticles revealed a bound water peak at 52 ppm, in agreement with results from the water-soluble chelate. Imaging of control nanoparticles showed no appreciable contrast, while PARACEST nanoparticles produced >10% signal enhancement. PARACEST nanoparticles were targeted to clots via antifibrin antibodies and produced a contrast-to-noise ratio (CNR) of 10 at the clot surface. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text