TY - JOUR
T1 - Distribution of Iron Oxide-containing Embosphere Particles after Transcatheter Arterial Embolization in an Animal Model of Liver Cancer
T2 - Evaluation with MR Imaging and Implication for Therapy
AU - Lee, Kwang Hun
AU - Liapi, Eleni
AU - Vossen, Josephina A.
AU - Buijs, Manon
AU - Ventura, Veronica Prieto
AU - Georgiades, Christos
AU - Hong, Kelvin
AU - Kamel, Ihab
AU - Torbenson, Michael S.
AU - Geschwind, Jean Francois H.
N1 - Funding Information:
This research was funded in part by grants from Genentech (South San Francisco, California), MDS Nordion (Ottawa, Ontario, Canada), Biocompatibles (Surrey, United Kingdom), Biosphere Medical (Rockland, Massachusetts), Boston Scientific Oncology (Natick, Massachusetts), and The Charles W. Pratt Foundation for Liver Cancer. K.H.L. is a salaried employee of Boston Scientific. J.F.H.G. serves as a paid consultant for MDS Nordion, Biocompatibles, Biosphere Medical, Terumo (Tokyo, Japan), and Boston Scientific. None of the other authors have identified a conflict of interest.
PY - 2008/10
Y1 - 2008/10
N2 - Purpose: To test whether different-sized iron oxide-containing Embosphere (IOE) particles can be detected by dedicated magnetic resonance (MR) imaging when injected intraarterially in an animal model of liver cancer and whether their distribution could be accurately predicted by MR imaging before confirmation with histopathologic analysis. Materials and Methods: Twenty New Zealand White rabbits implanted with VX2 liver tumor were randomly assigned to undergo embolization with 100-300-μm particles (group S; n = 10) or 300-500-μm particles (group L; n = 10). Embolization was performed with the catheter placed in the proper hepatic artery. T2*-weighted multiplanar MR imaging was performed within 24 hours after the procedure to detect paramagnetic IOE susceptibility artifact. MR imaging interpretation parameters included presence of artifact in the artery and/or at the tumor bed. Hematoxylin and eosin- and Prussian blue-stained pathologic slides were also obtained and the presence of IOE was evaluated similarly. Results: The MR detectability rates for IOEs were 100% in both groups. Paramagnetic susceptibility IOE artifact inside the tumor was detected in 30% of group S animals. On pathologic analysis, IOE particles were detected inside the tumor in 70% of this group. IOEs in group L were found outside the tumor within the hepatic artery on MR imaging and histopathologic study (P < .05). Conclusions: MR imaging readily detected IOE particles in an animal model of liver cancer regardless of the particle size. The smaller particles (100-300 μm) were delivered inside the tumor or in close proximity to the tumor margin, justifying their use for drug delivery or precise embolization.
AB - Purpose: To test whether different-sized iron oxide-containing Embosphere (IOE) particles can be detected by dedicated magnetic resonance (MR) imaging when injected intraarterially in an animal model of liver cancer and whether their distribution could be accurately predicted by MR imaging before confirmation with histopathologic analysis. Materials and Methods: Twenty New Zealand White rabbits implanted with VX2 liver tumor were randomly assigned to undergo embolization with 100-300-μm particles (group S; n = 10) or 300-500-μm particles (group L; n = 10). Embolization was performed with the catheter placed in the proper hepatic artery. T2*-weighted multiplanar MR imaging was performed within 24 hours after the procedure to detect paramagnetic IOE susceptibility artifact. MR imaging interpretation parameters included presence of artifact in the artery and/or at the tumor bed. Hematoxylin and eosin- and Prussian blue-stained pathologic slides were also obtained and the presence of IOE was evaluated similarly. Results: The MR detectability rates for IOEs were 100% in both groups. Paramagnetic susceptibility IOE artifact inside the tumor was detected in 30% of group S animals. On pathologic analysis, IOE particles were detected inside the tumor in 70% of this group. IOEs in group L were found outside the tumor within the hepatic artery on MR imaging and histopathologic study (P < .05). Conclusions: MR imaging readily detected IOE particles in an animal model of liver cancer regardless of the particle size. The smaller particles (100-300 μm) were delivered inside the tumor or in close proximity to the tumor margin, justifying their use for drug delivery or precise embolization.
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U2 - 10.1016/j.jvir.2008.06.008
DO - 10.1016/j.jvir.2008.06.008
M3 - Article
C2 - 18755602
AN - SCOPUS:52349111799
SN - 1051-0443
VL - 19
SP - 1490
EP - 1496
JO - Journal of Vascular and Interventional Radiology
JF - Journal of Vascular and Interventional Radiology
IS - 10
ER -