Imagery is widely reported as a tool used by elite performers to improve their performance. Despite this, there is little clear information about the integration of imagery into music performance practice. A review of the research in this area reveals that the term imagery is an extremely broad description of the ways that mental imagery is used in almost any area or performance. In this paper I have selected a specific approach, the PETTLEP model of motor imagery rehearsal that is aimed at one specific area of performance, motor imagery. The PETTLEP model is based on an understanding, from research in neuroscience, of how the brain works in relation to motor imagery. After applying the model to music performance practice, a number of findings emerged. The model is well suited for the demands of music performance practice and had a positive effect on performance outcomes. There also emerged ways in which further use of the journaling and analysis method may be improved. The clarity and successful application of this model demonstrates that it would be possible to develop specific approaches to mental imagery in music performance practice.