Transillumination imaging, also known as diaphanography, is being investigated to monitor organ disease in humans. This technology has many benefits, including the lack of ionizing radiation and cheaper costs associated with design and manufacture. The objective of the work was to create an optical tomography imaging system specifically for breast imaging. This was achieved by running simulations to identify the most effective configurations of light sources for producing transmitted images. This study used a 3D hemispherical breast model with four primary constituents: a skin layer, a fat layer, a muscle layer, and aberrant tissue. The 5 mm LED light sources at a wavelength of 950 nm were used and had optical powers of 0.1 W, 0.4 W, and 0.6 W, respectively. The findings indicated that the light distribution method successfully discriminated between instances with and without tumors but had difficulty distinguishing between tumors of various sizes. The research emphasized the visual obstacles and constraints associated with transillumination imaging, including the presence of blurred images and difficulty accurately discerning aberrant tissue sizes.