A method and system is provided for repositioning a patient on a transfer surface (e.g., a hospital bed, a stretcher, an imaging system, or the like). The system comprises two rollers positioned on one side of the surface, and a retractable transfer sheet wound around the rollers. The transfer sheet may be unwound from the two rollers to form two layers between the patient and the transfer surface. The patient may then be moved by sliding a top layer of the transfer sheet relative to a second layer of the transfer sheet. After use, the sheet can be retracted around the roller(s), allowing it to be stored in a location that is convenient but out-of-the-way. Such a system may allow a patient to be moved with less force, in less time, with fewer personnel, or with some other benefit.