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Paramagnetic Ultrasmall Gadolinium Oxide Nanoparticles as Advanced T1 MRI Contrast Agent: Account for Large Longitudinal Relaxivity, Optimal Particle Diameter, and In Vivo T1 MR Images
Abstract
Paramagnetic ultrasmall gadolinium oxide (Gd(2)O(3)) nanoparticles with particle diameters (d) of approximately 1 nm were synthesized by using three kinds of Gd(III) ion precursors and by refluxing each of them in tripropylene glycol under an O(2) flow. A large longitudinal relaxivity (r(1)) of water proton of 9.9 s(-1) mM(-1) was estimated. As a result, high contrast in vivo T(1) MR images of the brain tumor of a rat were observed. This large r(1) is discussed in terms of the huge surface to volume ratio (S/V) of the ultrasmall gadolinium oxide nanoparticles coupled with the cooperative induction of surface Gd(III) ions for the longitudinal relaxation of a water proton. It is found from the d dependence of r(1) that the optimal range of d for the maximal r(1), which may be used as an advanced T(1) MRI contrast agent, is 1-2.5 nm.
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(1999) · Choice Reviews Online · doi:10.5860/choice.37-0940 · Cited by 14,314
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Ni, D., Bu, W., Ehlerding, E. B., Cai, W., & Shi, J. (2017) · Chemical Society Reviews · doi:10.1039/c7cs00316a · Cited by 484
Aghebati‐Maleki, A., Dolati, S., Ahmadi, M., Baghbanzhadeh, A., Asadi, M., Fotouhi, A., Yousefi, M., & Aghebati‐Maleki, L. (2020) · Journal of Cellular Physiology · doi:10.1002/jcp.29126 · Cited by 417
Metadata
- Authors
- Park, J. Y., Baek, M. J., Choi, E. S., Woo, S., Kim, J. H., Kim, T. J., Jung, J. C., Chae, K. S., Chang, Y., & Lee, G. H.
- Venue
- ACS Nano
- Publisher
- American Chemical Society (ACS)
- Published
- 2009-10-16
- Volume
- 3
- Issue
- 11
- Pages
- 3663-3669
- ISSN
- 1936-0851 (ISSN-L)
- 1936-086X
- OpenAlex
- W2035855761
- Cited by
- 504
- References
- 1
- FWCI
- 9.89
- Type
- journal article
- Language
- en
- Open access
- closed
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