SPI review
allow for the display of more shades of gray
*each bit can display 2^n shades of grat, 4 bits =2^4= 2 x 2 x 2 x2= 16 shades of gray
ANSWER increasing the number of bits assigned to a pixel will:
evaluation of gallbladder function
ANSWER Ultrasound contrast media is least likely to be used in which of the following exams?
IF the reflector and the sound source are moving at the same speed and direction, the doppler
shift will:
ANSWER Not be detected
D. Filtering and compression
ANSWER Which of the following is a function of the signal processor?
Changing the color flow Doppler velocity scale alters the:
ANSWER Pulse Repetition Frequency
As the element diameter decreases, the focal length _______
ANSWER will decrease
Which of the following best describes ultrasound?
ANSWER A mechanical vibration transmitted through a medium as a longitudinal wave
Which of the following is correct regarding endocavity probes?
, ANSWER The most commonly incorporate a curved array of elements that are electronically
site an extended field of view
if you obtain a peak velocity of 60 cm/s with the Doppler correction angle set to 60 degrees and
you change it to 0 degrees, what is the displayed velocity in the vessel?
ANSWER 30 cm/s
Which of the following correctly describes the duty factor of an US system?
ANSWER Duty factor refers to the amount of time sound waves are being produced
What US system function converts the returned waves into all positive
voltages(compressions)?
ANSWER Rectification
If more cycles are added to a pulse, which of the following types of resolution is degraded?
ANSWER Axial
* if more cycles are added to a pulse, the SPL increases. Axial resolution is equal to 1/2 of the
SPL. if SPL increases, the larger the minimum reflector separation required to proper
resolution.
Which of the following describes a Multi-dimensional array?
ANSWER has thousands of elements arranged in a matrix pattern.
* A multi-dimensional trandsducer has thousands of elements arranged in a matrix pattern.
The element arrangement improves elevational resolution by reducing the slice thickness.
They are used to produce 3D/4D images.
allow for the display of more shades of gray
*each bit can display 2^n shades of grat, 4 bits =2^4= 2 x 2 x 2 x2= 16 shades of gray
ANSWER increasing the number of bits assigned to a pixel will:
evaluation of gallbladder function
ANSWER Ultrasound contrast media is least likely to be used in which of the following exams?
IF the reflector and the sound source are moving at the same speed and direction, the doppler
shift will:
ANSWER Not be detected
D. Filtering and compression
ANSWER Which of the following is a function of the signal processor?
Changing the color flow Doppler velocity scale alters the:
ANSWER Pulse Repetition Frequency
As the element diameter decreases, the focal length _______
ANSWER will decrease
Which of the following best describes ultrasound?
ANSWER A mechanical vibration transmitted through a medium as a longitudinal wave
Which of the following is correct regarding endocavity probes?
, ANSWER The most commonly incorporate a curved array of elements that are electronically
site an extended field of view
if you obtain a peak velocity of 60 cm/s with the Doppler correction angle set to 60 degrees and
you change it to 0 degrees, what is the displayed velocity in the vessel?
ANSWER 30 cm/s
Which of the following correctly describes the duty factor of an US system?
ANSWER Duty factor refers to the amount of time sound waves are being produced
What US system function converts the returned waves into all positive
voltages(compressions)?
ANSWER Rectification
If more cycles are added to a pulse, which of the following types of resolution is degraded?
ANSWER Axial
* if more cycles are added to a pulse, the SPL increases. Axial resolution is equal to 1/2 of the
SPL. if SPL increases, the larger the minimum reflector separation required to proper
resolution.
Which of the following describes a Multi-dimensional array?
ANSWER has thousands of elements arranged in a matrix pattern.
* A multi-dimensional trandsducer has thousands of elements arranged in a matrix pattern.
The element arrangement improves elevational resolution by reducing the slice thickness.
They are used to produce 3D/4D images.
