In addition, we will perform the same scans on 4 volunteers who have no history of sarcoma. Scanning volunteers will allow us to optimize the imaging technique by 1.) Determine the best combination of pulse-sequence and magnetization transfer technique to obtain the greatest contrast and 2.) Determine the parameters of repetition time (TR), echo time (TE) and magnetization transfer time and power in order to reduce overall image acquisition time while optimizing image quality. Honing this technique on volunteers will allow us to decrease scan time and potential discomfort for patients.