Logiq; 500 Clinical Measurement Accuracy; Logiq 500 Clinical Measurement Accuracy - GE Logiq 500 User Manual

LOGIQ

500 Clinical Measurement Accuracy

Basic Measurements
The following information is intended to provide guidance to the
user in determining the amount of variation or measurement
error that should be considered when performing clinical
measurements with this equipment. Error can be contributed
by equipment limitations and improper user technique. Be sure
to follow all measurement instructions and develop uniform
measurement techniques among all users to minimize the
potential operator error. Also, in order to detect possible
equipment malfunctions that could affect measurement
accuracy, a quality assurance (QA) plan should be established
for the equipment that includes routine accuracy checks with
tissue mimicking phantoms.
Please be advised that all distance and Doppler related
measurements through tissue are dependent upon the
propagation velocity of sound within the tissue. The
propagation velocity usually varies with the type of tissue, but
an average velocity for soft tissue is assumed. This equipment
is designed for, and the accuracy statements listed on 16–6
are based on, an assumed average velocity of 1540 m/s. The
percent accuracy when stated applies to the measurement
obtained (not the full scale range). Where the accuracy is
stated as a percent with a fixed value, the expected inaccuracy
is the greater of the two.
LOGIQ 500 Basic Users Manual
2233658–100 Rev. 0
System Data
16–5