Hee-Won Kim1,2, Karam Souibri3,
Gerald M. Pohost1,4
1Radiology, University of Southern
California, Los Angeles, CA, United States; 2Cardiology, Heart and
Vascular Institute, Hollywood Presbyterian Hospital, Los Angeles, CA, United
States; 3Cardiology, University of Southern California, Los
Angeles, CA, United States; 4Electrical Engineering, University of
Southern California, Los Angeles, CA, United States
A
stress control system was developed and evaluated to obtain improved
precision of the stress MR studies. The stability in stress was achieved by
the feed-forward or feedback control and audio-visual stimulation actuated by
the error signal. The system performance was evaluated by cardiac P-31 MRS at
3T. With the control system, it was clearly demonstrated that the stress
level is far more stable during the entire session and inter-subject
variation in the metabolic alterations is significantly reduced. It is
expected to assess cardiac function and metabolite alteration during moderate
stress with higher precision by using automatic stress control system.
Keywords