Southwest Diagnostic Imaging Center May 8, 2007 Mr. Terry Quincy Senior vice President Qualified Systems Installations, Inc. 7515 Greenville Ave. LB522 Dallas, TX 75231-3821 Dear Terry: Southwest Diagnostic Imaging Center is proud to have Qualified Systems Installations, Inc. (QSI) as its modular furniture provider. You have been providing us with superior service and installations of modular furniture since 1994. In my experience with you and the staff of QSI, you have proven to be informative, thorough, and accommodating to all off our furniture needs. Your service and expertise has excelled whether it is in the installation of large modular furniture projects, designing and installing modular furniture in a new space, or reworking and designing modular furniture configurations in an existing space. QSI has always completed projects for us in a timely and efficient manner, whether the job is small or complex. We strongly value our relationship with QSI and look forward to many years of continued service. Sincerely, Joanne Center Administrator