An image display system comprising: a tomographic image generation unit that: (i) is configured to control a radiation irradiation unit, which is disposed to oppose a radiation image detector, to irradiate a breast from different angles, wherein the breast is compressed between the imaging surface of an imaging table and a compression plate, and wherein the radiation image detector is disposed in the interior of the imaging table, (ii) is further configured to acquire a plurality of radiation images captured by the radiation image detector at the respective angles from the radiation image detector, and (iii) is further configured to generate, on the basis of the acquired plurality of radiation images, a tomographic image that is reconstructed by reference to the imaging surface; the image display system further comprising a height specification unit that specifies a height of a nipple of the breast by reference to the imaging surface; characterized in that the image display system comprises a display control unit that is configured to cause a display unit to display the tomographic image together with information relating to the nipple height specified by the height specification unit and information relating to a slice height of the tomographic image, which is displayed on the display unit, by reference to the imaging surface on a single axis representing a scale that shows the thickness of the compressed breast. a tomographic image generation unit that: (i) is configured to control a radiation irradiation unit, which is disposed to oppose a radiation image detector, to irradiate a breast from different angles, wherein the breast is compressed between the imaging surface of an imaging table and a compression plate, and wherein the radiation image detector is disposed in the interior of the imaging table, (ii) is further configured to acquire a plurality of radiation images captured by the radiation image detector at the respective angles from the radiation image detector, and (iii) is further configured to generate, on the basis of the acquired plurality of radiation images, a tomographic image that is reconstructed by reference to the imaging surface; the image display system further comprising a height specification unit that specifies a height of a nipple of the breast by reference to the imaging surface; characterized in that the image display system comprises (i) is configured to control a radiation irradiation unit, which is disposed to oppose a radiation image detector, to irradiate a breast from different angles, wherein the breast is compressed between the imaging surface of an imaging table and a compression plate, and wherein the radiation image detector is disposed in the interior of the imaging table, (ii) is further configured to acquire a plurality of radiation images captured by the radiation image detector at the respective angles from the radiation image detector, and (iii) is further configured to generate, a display control unit that is configured to cause a display unit to display the tomographic image together with information relating to the nipple height specified by the height specification unit and information relating to a slice height of the tomographic image, which is displayed on the display unit, by reference to the imaging surface on a single axis representing a scale that shows the thickness of the compressed breast.