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从漫射近似理论出发，详细讨论了漫射投影系统的透射光斑的点扩散函数与时间门的时间分辨率、探测器的有限大小、生物组织的厚度以及积分时间的关系
Based on the theory of diffuse approximation, the relationship between the point spread function of diffuse projection system and the temporal resolution of the time gate, the finite size of the detector, the thickness of the biological tissue and the integration time are discussed in detail