Figure 9.

(A) EEM of the brain tissue. (B) EEM of the tumorous tissue. (C) Spectral curves at 380 nm excitation. The emitted photon numbers of normal tissues and tumorous tissues at the emission wavelength of 462 nm were approximately 4000 and 2000, respectively; the emitted photon numbers of normal tissues and tumorous tissues at the emission wavelength of 614 nm were approximately 2000 and 4000, respectively. (D) Spectral curves at 450 nm excitation. The emitted photon numbers of normal tissues and tumorous tissues at the emission wavelength of 550 nm were approximately 1500 and 800, respectively; the emitted photon numbers of normal tissues and tumorous tissues at the emission wavelength of 612 nm were approximately 1000 and 2000, respectively. (E) Distribution of R₁. (F) Distribution of R₂.