To provide an image acquisition method and a display control program easy to use for a user of various scales such as a large hospital and a medical practitioner.

A controller 3 controlling a reader reading a radiation image recorded in a cassette is provided with a display control means 13 selectably displaying a pre-registration method of obtaining an image by previously registering correspondence between imaging position information and the cassette as imaging reservation information and then performing the imaging, a post-registration method of registering the correspondence between the imaging position information and a cassette insertion order as the imaging reservation information and obtaining the image, and a method of obtaining the image without registering the correspondence as the imaging reservation information and executes the sequential processing according to the method selected by the user.