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• W2174903274 abstract "P904 is a novel ultra-small superparamagnetic iron oxide (USPIO) contrast agent. This study was conducted to investigate the optimal dose of P904 for magnetic resonance imaging (MRI) of lymph nodes.T2*-weighted 3T MRI was performed in 14 normal mice before and 24 h after P904 injection at varying doses. Normalized signal intensity (nSI), signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), and contrast ratio (CR) were calculated to determine the optimal dose. MRI of the metastatic lymph node models (n=5) was acquired using the optimal dose and correlated with pathological results to calculate sensitivity and specificity. The mean SI ratio between pre- and postcontrast MRI was also calculated for each lymph node.The mean nSI and SNR values on postcontrast images were significantly lower at 300 μmol Fe/kg than at 75 μmol Fe/kg (p<0.001). The mean CNR and CR values were significantly higher at 300 μmol Fe/kg than at the other two doses (p<0.05). At the optimal dose of 300 μmol Fe/kg, the mean SI ratio of benign lymph nodes was significantly lower than that of metastatic lymph nodes (p<0.001). The Az (areas under the receiver operating characteristic curves) value for diagnosing lymph node metastasis at the optimal dose was 0.97.The optimal dose for P904-enhanced MRI of the lymph nodes was 300 μmol Fe/kg, which could be used for the diagnosis of lymph node metastasis." @default.
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• W2174903274 date "2014-10-01" @default.
• W2174903274 modified "2023-09-29" @default.
• W2174903274 title "Optimization of ultrasmall superparamagnetic iron oxide (P904)-enhanced magnetic resonance imaging of lymph nodes: initial experience in a mouse model." @default.
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