Shear wave elastography in healthy patients: Pancreatic stiffness is less reliable than liver and spleen measurements

Table 1 Descriptive statistics of the “healthy” study population

Variables	Total	Males	Females
Age (years)	37 ± 10	39 ± 11	35 ± 9
BMI (kg/m2)	23 ± 3	24 ± 2	21 ± 2
Spleen bipolar diam (cm)	10.8 ± 1.3	11.6 ± 0.9	9.8 ± 1.0
Spleen area (cm2)	33.3 ± 8.6	37 ± 8	29 ± 7
Pancreas body thick (cm)	1.1 ± 0.3	1.2 ± 0.3	1.1 ± 0.2

BMI: Body mass index.

Table 2 Median liver stiffness values

SWE technique	2D-QElaXto (10 mm ROI)	2D-QElaXto (15 mm ROI)	p-QElaXto (5 meas)	p-QElaXto (10 meas)	SSI (10 mm ROI)	SSI (15 mm ROI)
Mean liver stiffness (kPa)	3.9	3.9	4.4	4.4	4.6	4.7
Range (kPa)	2.4-6.5	2.7-6.8	3-0-8.1	3.0-8.0	3.5-7.3	3.5-7.1
SD	0.8	0.8	0.9	0.9	0.9	0.9
95%CI	3.66-4.11	3.69-4.15	4.13-4.66	4.12-4.65	4.41-4.89	4.44-4.93

2D-QElaXto: 2-dimensional-shear wave elastography; p-QElaXto: Point-shear wave elastography; SSI: SuperSonic Imagine; ROI: Region of interest; CI: Confidence interval.

Table 3 Median spleen stiffness values

SWE technique	2D-QElaXto (10 mm ROI)	2D-QElaXto (15 mm ROI)	p-QElaXto (5 meas)	p-QElaXto (10 meas)	SSI (10 mm ROI)	SSI (15 mm ROI)
Mean spleen stiffness (kPa)	19.4	20.0	23.0	22.9	21.9	21.7
Range (kPa)	9.8-26.7	11.7-32.6	13.5-46.9	13.1-36.1	13.4-35.9	13.5-33.8
SD	3.9	4.3	6.1	5.0	4.8	4.6
95%CI	18.27-20.60	18.72-21.20	21.10-24.86	21.45-24.34	20.57-23.33	20.37-23.04

2D-QElaXto: 2-dimensional-shear wave elastography; p-QElaXto: Point-shear wave elastography; SSI: SuperSonic Imagine; ROI: Region of interest; CI: Confidence interval.

Table 4 Median pancreas stiffness values

SWE technique	2D-QElaXto	p-QElaXto (5 meas)	p-QElaXto (10 meas)	SSI
Mean pancreas stiffness (kPa)	5.2	5.9	6.1	7.6
Range (kPa)	2.9-15.0	2.8-17.4	3.1-18.0	2.7-17.2
SD	1.9	2.5	2.4	2.6
95%CI	4.63-5.80	5.03-6.70	5.40-6.83	6.86-8.41

2D-QElaXto: 2-dimensional-shear wave elastography; p-QElaXto: Point-shear wave elastography; SSI: SuperSonic Imagine; CI: Confidence interval.