BioMed Research International

Research Article

Miniaturized Water-Jet Ultrasound Indentation System for Quantitative Assessment of Articular Cartilage Degeneration: A Validation Study

Table 1

Change of measured parameters before and after enzymatic digestions.


Parameters	Enzyme	Before treatment	After treatment	Change

Thickness (mm)	Trypsin
Thickness (mm)	Collagenase
IRC (dB)	Trypsin				]
IRC (dB)	Collagenase				]
Stiffness (MPa)	Trypsin				]
Stiffness (MPa)	Collagenase				]
(MPa)	Trypsin				]
(MPa)	Collagenase				]
EDR_WJ (%)	Trypsin				]
EDR_WJ (%)	Collagenase				]
EDR_RI (%)	Trypsin
EDR_RI (%)	Collagenase

Values are expressed as (SD). IRC: integrated reflection coefficient, E: Young’s modulus, EDR: energy dissipation ratio, WJ: water-jet, RI: Rigid indentation. Level of significance of change compared to pretreatment or comparison of changes between the two types of enzymatic digestion: , .