In a remote access environment that includes a server, a client device may remotely access, e.g., medical images from the server and may be provided with a mechanism to retrieve a test image, such as the TG-18 CT or TG-18 MP sample test patterns. The client device communicates display size information to the server, which generates the test image on-the-fly for the particular display size of the client device. For example, components in the test image and borders may be scaled to create an appropriate test image for any client device.