The reappearance and sign-noise ratio of laser Raman spectra of serum are better with the lower laser power and without heparin,which is a chief condition for the diagnosis of breast cancer.

• 血清不加抗凝素且使用低功率的激光可以得到重现性、信噪比都较好的谱图,以便利用光谱法诊断疾病。