SONOSIM LATEST UPDATE
Low impedance - ANSWER-paucity of returning sound waves = low amplitude =
dark/anechoic image
Acoustic coupling agents - ANSWER-Acoustic coupling gel
Water bath
Stand-off pad
General "GEN" mode - ANSWER-middle frequency of a transducer
Resolution "RES" mode - ANSWER-highest frequency of a transducer
Penetration "PEN" mode - ANSWER-lowest frequency of a transducer
High frequency transducers are best for ________ structures and low frequency
transducers are best for ________ structures - ANSWER-superficial, deep
standard transducer orientation - ANSWER-toward patient's right or cephalad
direction
Image artifact - ANSWER-incorrect representation of a structure or motion
Artifacts are caused by - ANSWER-Multiple echo paths
Velocity errors
Attenuation errors
Types of artifacts - ANSWER-Attenuation (shadowing)
Propagation (refraction)
Doppler artifacts
Low Attenuation (Increased Through-Transmission) - ANSWER-Sound waves can
travel through fluid-filled organs with little attenuation
When sound encounters low-attenuating tissue, echoes are enhanced posteriorly
Bladder can be used as an acoustic window
gain - ANSWER-controls the brightness of echo signals
Focal Zone - ANSWER-area where beam width is narrowest
Low impedance - ANSWER-paucity of returning sound waves = low amplitude =
dark/anechoic image
Acoustic coupling agents - ANSWER-Acoustic coupling gel
Water bath
Stand-off pad
General "GEN" mode - ANSWER-middle frequency of a transducer
Resolution "RES" mode - ANSWER-highest frequency of a transducer
Penetration "PEN" mode - ANSWER-lowest frequency of a transducer
High frequency transducers are best for ________ structures and low frequency
transducers are best for ________ structures - ANSWER-superficial, deep
standard transducer orientation - ANSWER-toward patient's right or cephalad
direction
Image artifact - ANSWER-incorrect representation of a structure or motion
Artifacts are caused by - ANSWER-Multiple echo paths
Velocity errors
Attenuation errors
Types of artifacts - ANSWER-Attenuation (shadowing)
Propagation (refraction)
Doppler artifacts
Low Attenuation (Increased Through-Transmission) - ANSWER-Sound waves can
travel through fluid-filled organs with little attenuation
When sound encounters low-attenuating tissue, echoes are enhanced posteriorly
Bladder can be used as an acoustic window
gain - ANSWER-controls the brightness of echo signals
Focal Zone - ANSWER-area where beam width is narrowest
