Figure 3
From: Dynamic 31P-MRI and 31P-MRS of lower leg muscles in heart failure patients

PCr imaging. Representative cross-sectional PCr image of the calf muscle from a volunteer (top) and a HF-patient (bottom), obtained from pre, after exercise and end of recovery respectively. The low SNR of HF-patient image is due to the low PCr concentration of the calf muscles compared to volunteer. The first column shows images with 10 averages to increase SNR.