Ultrasound Physics - Mock Exam Questions for SPI. | COMPLETE
QUESTIONS WITH 100% RATED CORRECT ANSWERS!!
Ultrasound or ultrasonography uses _____ frequency sound waves and their echoes -
(answers)high
Ultrasound is similar to the echolocation used by _____, _____, and _____, as well as SONAR
used by _____ - (answers)bats; whales; dolphins; submarines
Ultrasound is the only diagnostic modality that does not use _____ - (answers)electromagnetic
radiation
MRI uses _____ - (answers)radiowaves
Diagnostic ultrasound sends a series of _____ waves into the body - (answers)sound
The sound waves sent into the body by US will:
1. interact with _____
2. be changed by interaction with _____
3. return useful information in a form in which we can _____ - (answers)tissue; tissue; interpret
The _____ generates a series of ultrasound waves which enter the body and encounter various
tissue interfaces. This tissue interaction causes some of the sound waves to be _____ back to the
transducer. - (answers)transducer; reflected
Some sound waves are transmitted until they reach another _____ and then get reflected -
(answers)boundary
When these waves a reflected back ("echoed") to the transducer:
1. some waves are reduced in _____ (strength) depending on tissue interaction
, 2. some waves take longer to return to the transducer because they traveled _____ into the body
('time of flight") - (answers)amplitude; further
The US machine calculates the distance from the probe to the tissue or organ using:
1. the speed of sound in tissue (approx. _____ m/s)
2. the time of each echo's return or "time of flight" (usually on the order of _____ of a second) -
(answers)1, 540; millionths
Returning ultrasound waves, or echoes, are transformed by the US machine into _____ signals
that are displayed as an array of "_____" on the monitor - (answers)electrical; dots
A 2-dimensional gray-scale image is produced by assigning different shades of _____ to the
varying echo strengths - (answers)grey
Stronger amplitude waves show up as _____, _____ "dots" - (answers)whiter; brighter
Waves that have longer "time of flight" are placed _____ deeper on the monitor display, this
corresponds to the _____ location of the echo-generating structure. - (answers)further; anatomic
_____ refers to the shades of blacks, whites, and grays of a tissue - (answers)echogenicity
_____ refers to the spacing of the "dots" that make up the images - (answers)echotexture
If something is dark on US we describe it as _____ - (answers)hypoechoic
If something is bright on US we describe it as _____ - (answers)hyperechoic
Echotexture is also how we recognize _____ - (answers)organs
_____ = bright, white echoes - (answers)hyperechoic
QUESTIONS WITH 100% RATED CORRECT ANSWERS!!
Ultrasound or ultrasonography uses _____ frequency sound waves and their echoes -
(answers)high
Ultrasound is similar to the echolocation used by _____, _____, and _____, as well as SONAR
used by _____ - (answers)bats; whales; dolphins; submarines
Ultrasound is the only diagnostic modality that does not use _____ - (answers)electromagnetic
radiation
MRI uses _____ - (answers)radiowaves
Diagnostic ultrasound sends a series of _____ waves into the body - (answers)sound
The sound waves sent into the body by US will:
1. interact with _____
2. be changed by interaction with _____
3. return useful information in a form in which we can _____ - (answers)tissue; tissue; interpret
The _____ generates a series of ultrasound waves which enter the body and encounter various
tissue interfaces. This tissue interaction causes some of the sound waves to be _____ back to the
transducer. - (answers)transducer; reflected
Some sound waves are transmitted until they reach another _____ and then get reflected -
(answers)boundary
When these waves a reflected back ("echoed") to the transducer:
1. some waves are reduced in _____ (strength) depending on tissue interaction
, 2. some waves take longer to return to the transducer because they traveled _____ into the body
('time of flight") - (answers)amplitude; further
The US machine calculates the distance from the probe to the tissue or organ using:
1. the speed of sound in tissue (approx. _____ m/s)
2. the time of each echo's return or "time of flight" (usually on the order of _____ of a second) -
(answers)1, 540; millionths
Returning ultrasound waves, or echoes, are transformed by the US machine into _____ signals
that are displayed as an array of "_____" on the monitor - (answers)electrical; dots
A 2-dimensional gray-scale image is produced by assigning different shades of _____ to the
varying echo strengths - (answers)grey
Stronger amplitude waves show up as _____, _____ "dots" - (answers)whiter; brighter
Waves that have longer "time of flight" are placed _____ deeper on the monitor display, this
corresponds to the _____ location of the echo-generating structure. - (answers)further; anatomic
_____ refers to the shades of blacks, whites, and grays of a tissue - (answers)echogenicity
_____ refers to the spacing of the "dots" that make up the images - (answers)echotexture
If something is dark on US we describe it as _____ - (answers)hypoechoic
If something is bright on US we describe it as _____ - (answers)hyperechoic
Echotexture is also how we recognize _____ - (answers)organs
_____ = bright, white echoes - (answers)hyperechoic
