The preservation of image collections is a goal of many libraries and organizations. Among the considerations for long-term preservation is the choice of file format. An emerging file format for preservation is PDF/A, which is a proposed international standard for long-term electronic document preservation. Since this file format can be used for image preservation, there are a number of considerations to be followed for converting image files to PDF/A, and also for ultimately migrating from PDF/A to successor file formats. As a result of research and development in electronic document delivery and file conversion, an Internet-based file migration system called MyMorph has been created at the National Library of Medicine. MyMorph was developed as a file migration service that allows the bulk conversion of electronic documents to PDF in a manner that minimizes certain aspects of the migration cost. The user interface permits file migration to proceed in batch mode, requiring minimal user interaction regardless of the number of files converted. After more than two years of use, the system is being modified to facilitate the creation of PDF/A files from source files consisting of scanned images. This paper details the design decisions for extending MyMorph to create image-based PDF/A files.