echosens FibroScan 502 touch - Shear Wave Speed Results Area

(ETS FIBROSCAN 502 TOUCH USER MANUAL FibroScan
Invalid measurements
The measurement is automatically rejected by the algorithms if the pulse sent out by the
transducer could not be delivered successfully and/or if the shear wave propagation maps
are not satisfactory.
The message 'INVALID' is then displayed above the shear wave propagation map.
6.6.6. Shear wave speed results area
Median
Shear wave speed is expressed in meters per second (m/s). This value is the median of all
valid measurements performed during the examination.
If the repeat measurement is invalid, the median is not recalculated. To obtain a reliable and
representative shear wave speed measurement in the liver, at least 10 valid measurements
must be taken.
个 Refer to the warning in Chapter 2 concerning interpretation of the result.
Interquartile range (IQR)
The interquartile range (IQR) is expressed in meters per second (m/s). It represents the
interval around the median within which will fall 50% of all valid measurements. It is
recalculated after each new valid measurement.
36 03/2017 - ECHOSENSTM AND FIBROSCAN® ARE TRADEMARKS © COPYRIGHT ECHOSENS - ALL RIGHTS RESERVED E300M017.4