. Author manuscript; available in PMC: 2010 Nov 1.

Published in final edited form as: Arch Phys Med Rehabil. 2009 Nov;90(11):1829–1838. doi: 10.1016/j.apmr.2009.04.015

Table 1.

Ordinal Imaging Scores

Tissue Imaging Score (TIS)		Blood Flow Waveform Score (BFS)
Score	Criterion	Score	Criterion
0	No focal lesion on echo or stiffness image (includes heterogeneity)	0	Normal muscle flow, no visible blood vessel (Resistive index, RI^*=1)
1	Evidence of focal lesion on both echo and stiffness image	1	Elevated blood flow in diastole (Resistive index, RI<1)
2	Multiple focal lesions or marked heterogeneity on both echo and stiffness image	2	Oscillatory flow or sustained retrograde flow in diastole (Resistive index, RI>1)

RI = Resistive Index, see text for definition