PURPOSE: To develop a software program for computer-assisted instruction on MR imaging of congenital heart disease for medical students and residents to achieve repetitive and effective self-learning. MATERIALS AND METHODS: We used a film scanner(Scan Maker 35t) and IBM-PC(486 DX-2, 60 MHz) for acquisition and storage of image data. The accessories attached to the main processor were CD-ROM drive(Sony), sound card(Sound blaster-Pro), and speaker. We used software of Adobe Photoshop(v 3.0) and Paint Shop-Pro(v 3.0) for preprocessing image data, and Paint brush from Microsoft Windows 3.1 for labelling. The language used for programming was Visual basic(v 3.0)from Microsoft Corporation. RESULTS: We developed a software program for computer-assisted instruction on MR imaging of congenital heart disease as an effective educational tool.