Near-infrared autofluorescence detection and co-axial projection for identification of parathyroid gland

Aiming at convenient and quick identification of parathyroid glands, a set of portable rapid identification system of parathyroid glands was developed in this paper.According to autofluorescence characteristics of parathyroid glands, fluorescence excitation and capture system was designed. The annular row arrangement of excitation light source was designed for meeting the requirements of clinical operation. An co-axial projection indicating system, including projector and dichroic mirror, were designed. The projection field of view and shooting field of view were matched and not affected by the change of the working environment The upper computer software of the system was developed based on Python and PYQT. Based on the maximum peak value and average gray level of the histogram, the algorithm of histogram equalization clipping threshold parameter was improved. Comparing the subjective feeling and objective evaluation index of the enhanced image, the fluorescence image enhancement effect of this paper is better than that of common algorithms. Simulated clinical experiments have verified that the system can distinguish parathyroid glands from muscle and adipose tissue with accuracy.