Near‐infrared tomographic imaging of tissue can give structural anatomy data based on the attenuation coefficients and absorption spectra of biological tissue. The near infrared spectrum ranges from wavelengths of 650 to 1350 nm where the light has its maximum depth of penetration in tissue. The equipment developed with a diode laser source and an array of 32 photodiode detectors and was based on the 3rd generation CT in fan-beam with rotating source and detectors. The imager moves through 360 degrees and takes projections of the object and tomographic image of the phantom was obtained by reconstructing the using filtered back projection algorithm.