A device to measure with infrared radiation, then make a projection picture of, blood concentration inside the body of animals. Blood concentration in cancer masses increases, when compared to adjoining tissues, as flesh and bones, also with a disorganized capillary distribution. The device disclosed in this invention makes two types of images, a first image, which we call transmitted image, with infrared radiation that suffered no scattering as it propagates through the body or part of the body, and a second image, which we call scattered image, with radiation that suffered one or more scattering events, as it propagates through the body. Finally, a third image can be made from a combination of the first and second image after a suitable mathematical manipulation of the first and/or second images. Each of the three images may be used as an indication of cancer.