Abstract | OBJECTIVES: To assess the contrast-enhancing effects of citrate-coated superparamagnetic iron oxide particles (VSOP-C184) in a rat liver tumor model using dynamic and delayed magnetic resonance imaging in comparison to carboxydextran-coated particles ( ferucarbotran) and a hepatobiliary contrast medium ( gadobenate dimeglumine). MATERIALS AND METHODS: A total of 32 male rats with liver tumors (CC-531 colorectal carcinoma) were examined at 1.5 T with a T1-weighted dynamic series (3D gradient echo sequence) and T1-weighted and T2*-weighted images (2D gradient echo sequences) before and 15 and 90 minutes after injection. VSOP-C184 was investigated at doses of 0.015, 0.045, and 0.06 mmol Fe/kg, ferucarbotran at 0.015 mmol Fe/kg, and gadobenate dimeglumine at 0.025, 0.05, and 0.1 mmol Gd/kg. Liver- tumor contrast-to-noise ratio (CNR) was calculated and statistically compared. RESULTS: T1-weighted dynamic images: VSOP-C184 has significantly higher CNR values at a dose of 0,015 mmol Fe/kg than ferucarbotran at the same dose (P = 0.001). VSOP-C184 produces a significantly higher CNR at a dose of 0.045 mmol Fe/kg than gadobenate dimeglumine at a dose of 0.05 mmol Gd/kg (P = 0.019). At a dose of 0.06 mmol Fe/kg, the CNR for VSOP-C184 is significantly lower than that of gadobenate dimeglumine (0.1 mmol Gd/kg) (P = 0.005).T2-weighted delayed images: CNR values of VSOP-C184 are similar to those of ferucarbotran and are significantly higher than those of gadobenate dimeglumine (P < 0.05). CONCLUSIONS: On T1-weighted magnetic resonance imaging of liver tumors VSOP-C184 produces a high contrast comparable to that of a hepatobiliary contrast medium in addition to its contrast-enhancing effect in T2-weighted imaging.
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Authors | Nicola Kaufels, Ronny Korn, Susanne Wagner, Tania Schink, Bernd Hamm, Matthias Taupitz, Jörg Schnorr |
Journal | Investigative radiology
(Invest Radiol)
Vol. 43
Issue 7
Pg. 496-503
(Jul 2008)
ISSN: 1536-0210 [Electronic] United States |
PMID | 18580332
(Publication Type: Comparative Study, Evaluation Study, Journal Article)
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Chemical References |
- Anions
- Contrast Media
- Dextrans
- Magnetite Nanoparticles
- Oxides
- ferumoxtran-10
- Iron
- Gadolinium DTPA
- Ferrosoferric Oxide
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Topics |
- Animals
- Anions
- Contrast Media
(pharmacokinetics)
- Dextrans
- Ferrosoferric Oxide
- Gadolinium DTPA
(pharmacokinetics)
- Iron
(pharmacokinetics)
- Liver Neoplasms
(diagnosis, secondary)
- Magnetic Resonance Imaging
(methods)
- Magnetite Nanoparticles
- Metabolic Clearance Rate
- Organ Specificity
- Oxides
(pharmacokinetics)
- Rats
- Rats, Wistar
- Sensitivity and Specificity
- Tissue Distribution
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