Quatech Audio/Video Capture USB 2.0 Spécifications télécharger pdf (Page 373)

z.one ultra and z.one ultra sp OPERATOR MANUAL 15-7



Side lobes (from single-element transducers) and grating lobes (from array

transducers) cause objects that are not directly in front of the transducer to be

displayed incorrectly in lateral position.

Speckle appears as tissue texture close to the transducer but does not

correspond to scatterers in tissue. It is produced by ultrasound wave interference

and results in general image degradation.

Spectral broadening is a display phenomenon that occurs when the number of

energy-bearing Fourier frequency components increases at any given point in

time. As a consequence, the spectral display is broadened. Spectral broadening

can indicate the disturbed flow caused by a lesion, and therefore it is important

diagnostically. However, broadening can also result from interaction between flow

and sample volume size, in which case it is an artifact.

Speed of sound artifacts occur if the sound propagation path to a reflector is

partially through bone, and the speed of sound is greater than in the average soft

tissue. Echo position registration artifacts will be produced. Reflectors appear

closer to the transducer than their actual distance because of this greater speed

of sound, resulting in a shorter echo transit time than for paths not containing

bone.

Power-ON

Problems

 SmartCart/SmartCart sp (Docked Scan Engine/Scan Module) Fails To

Power ON

• Ensure the AC power is connected to a wall outlet.

• Ensure the AC power cord is fully seated in the socket on the rear of the cart.

• Ensure the circuit breaker (located in the lower-left of the rear panel) is in the

ON (“I” pressed in) position.

• With active AC power applied and a docked Scan Engine/Scan Module on the

Cart, verify that LEDs located at bottom/rear of

SmartCart/SmartCart sp are in

the following condition:

 LED #1: Flashing (Power Supply “heartbeat” – supply is alive)

 LED #2: ON (or flashing) if system is equipped with ZPAK battery

OFF if system does not have ZPAK battery

 LED #3: OFF (always)

 LED #4 ON, after Cart Power ON/OFF button on scanner deck is

pressed

 LED #5: ON (with docked scanner)

•Verify the Scan Engine/Scan Module is securely docked on the docking plate

of the Cart and then repeat the power-on procedure.

• If the Cart still does not power ON and is equipped with a Scan Engine, remove

the

Scan Engine and attempt to operate the Scan Engine in standalone mode

(powered by its internal battery) to determine if the problem is with the Cart or

Scan Engine.

NOTE: The Scan Module cannot be operated undocked from the Cart.

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Quatech Audio/Video Capture USB 2.0 Spécifications Page 373

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