Figure 4From: Ultrasound entropy may be a new non-invasive measure of pre-clinical vascular damage in young hypertensive patientsWavelet energy distributions corresponding to 4 levels of detail. (A) An ordered signal with most spectral content within one frequency band. (B) An alternative ordered signal with almost all spectral content within one frequency band. (C) A disordered signal with energy distribution almostequal in all frequency bands. Adapted from (4).Back to article page