【摘要】 在改进弛豫曲线拟合方程为双对数模型的基础上,提出一个能综合反映肺磁场弛豫特性的新参量α~*。通过对一批大剂量染铁硅混合尘的大鼠病理模型进行实验,得到了α~*随染尘后时间τ的变化规律,发现α~*随动物临床死亡后的时间以双曲线规律下降,弛豫α~*值与动物病理切片的评分值呈线性相关。更多还原

【Abstract】 Based on proposing a new equation B=Bo + BI In (t+1) +B11 1n2 (t + 1) for fitting the relaxation curve, a new relaxation parameter, which can characterize the curve comprehensively, is put forword. Byexperimentally investigating a number of rats exposed to 80 mg SiO2+20mg Fe3O4 particles, the variation law; of α* vs. the time after exposure &/or death are gained. A highly significant linear negative correlation between the α* values and the grade data got from the pathologic sections is discovered.更多还原