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华西医学  2010 

优化牙釉质辐射剂量重建方法中的电子顺磁共振谱拟合程序

, PP. 2160-2163

Keywords: 牙釉质,电子顺磁共振

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Abstract:

【】 目的 优化牙釉质电子顺磁共振(EPR)谱拟合程序。 方法 将牙釉质EPR谱拟合程序中的RIS-BGS偏移量设置为定参,取优化值;增加手动拟合功能,可以将参数初始值直接代入高斯模型得到拟合谱。 结果 将牙釉质EPR谱拟合程序中RIS-BGS偏移量设置为定参后,其优化值为0.529,减少了变参数量;采用手动拟合功能有助于调整参数初始值;在自动拟合程序对于个别样品谱不能给出正确结果情况时,仍然可以通过手动拟合来得到一个近似的拟合结果。 结论 优化了EPR谱拟合程序的应用过程。?【Abstract】 Objective Tooptimizetheenamelelectronparamagneticresonance(EPR)spectrumfittingprocedure. Methods RIS-BGSoffsetwassetasadeterminedparameterinenamelEPRspectrumfittingprogram,andanoptimizedvaluewasgivenforRIS-BGSoffset.AmanualfittingfunctionwasdesignedthatcansubstitetheinitutialvalueintotheGaussianmodelfunctiondirectly. Results RIS-BGSoffsetwassetasadeterminedparameter,theoptimizedvalueofwhichwas0.529.Thenumberofparametersdecreased;themanualfittingfunctionmakediteasiertoselectinitialvaluesforparameters.WhentheautofittingprogramfailedtogiveacorrectresultforsomeEPRspectrum,afittingresultcouldstillbeobtainedwiththemanualfittingmethod. Conclusion Theapplicationofthespectrumfittingprocedurecanbeoptimized.

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