用于小动物在体肿瘤成像的荧光分子层析成像系统

Abstract

A fluorescence molecular tomography system for in vivo tumor imaging is developed using a 748-nm continuous wave diode laser as an excitation source.A high sensitivity cooled charge-coupled device (CCD) camera with excitation and emission filters is utilized to obtain the excitation and fluorescence images.The laser beam performs fast raster scanning using a dual-axis galvanometric scanner.The accuracy of the laser spot position at the source window is within ±200 µm.Based on the phantom experimental results, the spatial resolution is less than 1.7 mm, and the relative quantitation error is about 10%.In vivo imaging of a tumor-bearing nude mouse tagged with near-infrared dye demonstrates the feasibility of the system.