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Characterization of magnetically fractionated magnetic nanoparticles for magnetic particle imaging
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10.1063/1.4829484
/content/aip/journal/jap/114/17/10.1063/1.4829484
http://aip.metastore.ingenta.com/content/aip/journal/jap/114/17/10.1063/1.4829484

Figures

Image of FIG. 1.
FIG. 1.

Schematic figure of a magnetic nanoparticle and its analytical model.

Image of FIG. 2.
FIG. 2.

Schematic figure of the preparation of magnetically fractionated MNPs (MS1, MS2, and MS3) from Ferucarubotran.

Image of FIG. 3.
FIG. 3.

Harmonic spectra of the immobilized MS series when an AC excitation field with frequency of 10 kHz is applied. The amplitude of the field is (a)  = 2.8 mT and (b)  = 28 mT.

Image of FIG. 4.
FIG. 4.

Static curve for each MS series.

Image of FIG. 5.
FIG. 5.

(a) Estimated distribution of the effective core size for each MS series. The vertical axis represents volume weighted number density of the MNPs. (b) Solid line represents the reconstructed core size distribution of Ferucarbotran, which was calculated from those of the MS series shown in Fig. 5(a) . Dotted line represents the effective core size distribution of Resovist®.

Image of FIG. 6.
FIG. 6.

Estimated correlations between the anisotropy energy barrier and magnetic moment for the MS series. Dotted and dashed-dotted lines represent the relationship for the case of  = 3 kJ/m3 and 4 kJ/m3 in Eq. (4) , respectively. was set to 360 kA/m.

Image of FIG. 7.
FIG. 7.

Hydrodynamic size distribution of each MS series measured with DLS. The vertical axis represents the volume weighted number density of the MNPs.

Image of FIG. 8.
FIG. 8.

Relationship between the mean core size and the mean hydrodynamic size for the MS series.

Image of FIG. 9.
FIG. 9.

Comparison between experimental harmonic spectra and corresponding numerical simulations from MS series when an AC excitation field with  = 28 mT and  = 10 kHz is applied.

Image of FIG. 10.
FIG. 10.

Harmonic signal strength generated by each effective core size distributed in (a) MS1, (b) MS2, and (c) MS3.

Tables

Generic image for table
Table I.

Parameters of the MS series, which were magnetically divided into three fractions from Ferucarbotran. The peak effective core size and peak hydrodynamic size were determined from Figs. 5(a) and 7 , respectively. The thickness of the coating material is calculated with  = ( )/2.

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/content/aip/journal/jap/114/17/10.1063/1.4829484
2013-11-05
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Characterization of magnetically fractionated magnetic nanoparticles for magnetic particle imaging
http://aip.metastore.ingenta.com/content/aip/journal/jap/114/17/10.1063/1.4829484
10.1063/1.4829484
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