Abstract: A nervous tissue imaging system includes a pair of matched filters, including an excitation light filter that only passes excitation light in a first wavelength range from 365 nm to 400 nm, and a received light detection filter that only passes received light in a second wavelength range from 433 nm to 450 nm. An endoscope is connected with a first source optical train for guiding excitation light through the first source optical train and the excitation light filter to uniformly illuminate the excitation light on a patient's tissue region of interest inside an enclosed cavity of the patient's body. The endoscope is connected to a camera device and a receiving optical train and the received light detection filter for receiving and passing into the camera device light signals including autofluorescence light in the second wavelength range from healthy nervous tissue in the patient's tissue region of interest.