School Of Basic And Applied Sciences

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Subject: search.filters.subject.Magnetic resonance imaging

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    Superparamagnetic Iron Oxide-Based Nanomaterials for Magnetic Resonance Imaging
    (Springer Science and Business Media Deutschland GmbH, 2021-10-29T00:00:00) Niraula, Gopal; Mathpal, Mohan Chandra; Medrano, Jason J. A.; Singh, Manish Kumar; Coaquira, Jose A. H.; Verma, Ramesh; Sharma, Surender K.
    Magnetic resonance imaging (MRI) is the technique for the visualization of targeted macromolecules or cells in biological system. Nowadays, superparamagnetic iron oxide nanoparticles (SPIONs) have been attracted and remarkably emerging as a negative contrast agent (T2-weighted) offering sufficient detection sensitivity as compared to positive contrast agent (T1-weighted). In the present chapter, we first introduce the necessary background of superparamagnetic iron oxide-based nanoparticles and MRI taking into an account to discuss both T1�T2-weighted imaging. The liquid-based synthesis methods of SPIONs and their applicability in MRI have been thoroughly revised. Finally, several nanohybrids such as magnetic-silica, magneto-luminescent, magneto-plasmonic along with ferrite-based SPIONs are thoroughly presented in light of MRI application. � 2021, Springer Nature Switzerland AG.
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    Surface-engineered gadolinium oxide nanorods and nanocuboids for bioimaging
    (University of Science and Technology Beijing, 2020-04-04T00:00:00) Chawda, Nitya Ramesh; Mahapatra, Santosh Kumar; Banerjee, Indrani
    Abstract: Folic acid and D-gluconic acid-capped gadolinium oxide nanorods and nanocuboids were synthesized via co-precipitation method. Comparative study of relaxivity factor on the role of capping and morphology for enhancing contrast ability for T1 and T2 magnetic resonance imaging (MRI) was investigated. The obtained r2/r1 ratio for folic acid and D-gluconic acid-capped gadolinium oxide nanorods and nanocuboids was 1.5 and 1.3, respectively. The nanocrystals were characterized and presented with properties such as good dispersity and stability required for standard contrast agent used in MRI. The characterization and the analysis of capping agent for nanocrystals suggest the preferable use of carbohydrate moieties with higher number of hydroxyl functional group reacted with urea and hydrogen peroxide for desired morphology and anisotropic growth. Thermogravimetric�differential thermal analysis (TG�DTA) illustrated the amount of capping, transition temperature from Gd(OH)3 to GdOOH and crystallization temperature from GdOOH to Gd2O3. These nanocrystals would be significant for other biomedical applications such as drug delivery when equipped with well-functionalized drug molecules. Graphic abstract: Synergistic effects and mechanism of urea, hydrogen peroxide and capping agent for growth and morphology. [Figure not available: see fulltext.] � 2020, The Nonferrous Metals Society of China and Springer-Verlag GmbH Germany, part of Springer Nature.
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    Surface-engineered gadolinium oxide nanorods and nanocuboids for bioimaging
    (University of Science and Technology Beijing, 2020) Chawda, N.R; Mahapatra, S.K; Banerjee, I.
    Abstract: Folic acid and D-gluconic acid-capped gadolinium oxide nanorods and nanocuboids were synthesized via co-precipitation method. Comparative study of relaxivity factor on the role of capping and morphology for enhancing contrast ability for T1 and T2 magnetic resonance imaging (MRI) was investigated. The obtained r2/r1 ratio for folic acid and D-gluconic acid-capped gadolinium oxide nanorods and nanocuboids was 1.5 and 1.3, respectively. The nanocrystals were characterized and presented with properties such as good dispersity and stability required for standard contrast agent used in MRI. The characterization and the analysis of capping agent for nanocrystals suggest the preferable use of carbohydrate moieties with higher number of hydroxyl functional group reacted with urea and hydrogen peroxide for desired morphology and anisotropic growth. Thermogravimetric�differential thermal analysis (TG�DTA) illustrated the amount of capping, transition temperature from Gd(OH)3 to GdOOH and crystallization temperature from GdOOH to Gd2O3. These nanocrystals would be significant for other biomedical applications such as drug delivery when equipped with well-functionalized drug molecules. Graphic abstract: Synergistic effects and mechanism of urea, hydrogen peroxide and capping agent for growth and morphology. [Figure not available: see fulltext.] � 2020, The Nonferrous Metals Society of China and Springer-Verlag GmbH Germany, part of Springer Nature.