Siemens ACUSON Freestyle - Average Noise Level Indicator

6-8 ACUSON Freestyle User Manual
Wireless Probes
Average Noise Level Indicator
An additional indicator of wireless imaging quality, called the Average Noise Level (ANL)
has been calculated for various conditions. ANL is another tool to guide wireless scanning. It
provides a measure of the potential for a compromised wireless link to introduce noise artifact
into the image. ANL is displayed in real-time above the wireless signal quality meter.
ANL is displayed in dB. An ANL value of 0.0 represents the optimal setting and indicates that
the signal quality is very good and free of errors that might introduce noise into the image.
Be alert to the ANL level, in accordance with the guidance below. To insure optimal wireless
imaging, use the information from both the wireless signal quality meter and the ANL.
PATIENT NAME
PATIENT ID
XXX
XXX
XXX
XXX
XXX
XXX
XXX
XXX
L13-5
Nerve Gen
2.5cm
G 9
CG 10
SC 3
SF 6
PP 10
55dB
CF 1
CP 1
Vel 1
Pri 4
20 Hz
ANL 0.0 dB
XXX XXX XXX XXX
--------
ANL 0.0 dB
--------
ANL 0.5 dB
--------
ANL 1.3 dB
--------
ANL 2.9 dB
--------
--------
No Signal
OK
P S
P S
Five different Average Noise Level (ANL) conditions; last one showing “No Signal”