ARDMS SPI EXAM LATEST REAL
150 QUESTIONS AND CORRECT
ANSWERS 3
⩥ Lateral resolution is dependent on? Answer: beam diameter
⩥ Where does the beam of an unfocused transducer diverge? Answer:
Fraunhofer zone
⩥ Reverberation artifacts are a result of Answer: two or more strong
reflecting surfaces
⩥ True/False: Grating lobes are essential for the proper operation of a
linear phased array. Answer: False
⩥ True/False: Electronically steered scanners always produce higher
resolution images than do mechanically steered scanners. Answer: False
⩥ True/False: An annular array scanner uses mechanical beam steering.
Answer: True
,⩥ True/False: A linear sequenced array cannot be dynamically focused.
Answer: False
⩥ registration or B-mode alignment Answer: Which AIUM test object
function utilizes all the groups of wires in the AIUM 100 mm test
object?
⩥ axial resolution Answer: Which AIUM test object function utilizes the
A group of wires in the AIUM 100 mm test object?
⩥ lateral resolution Answer: Which AIUM test object function utilizes
the B group of wires in the AIUM 100 mm test object?
⩥ dead zone Answer: Which AIUM test object function utilizes the D
group of wires in the AIUM 100 mm test object?
⩥ depth calibration Answer: Which AIUM test object function utilizes
the C or E groups of wires in the AIUM 100 mm test object?
⩥ What happens to axial resolution when spatial pulse length is
decreased? Answer: improves
⩥ How much will a 3.5 MHz pulse be attenuated after passing through 2
cm of soft tissue? Answer: 3.5 dB
,⩥ Propagation speed errors result in Answer: improper axial position
⩥ Enhancement is caused by Answer: weakly attenuating structures
⩥ The Doppler shift frequency is Answer: directly proportional to the
velocity of the reflector
⩥ The number of frames per second necessary for a real-time image to
be flicker free is Answer: more than 15
⩥ True/False: The SPTA intensity will always be larger than the SATA
intensity. Answer: True
⩥ The intensity of the ultrasound beam is usually greater at the focal
zone because of Answer: the smaller beam diameter
⩥ If the amplitude is doubled, the intensity is Answer: quadrupled
⩥ The attenuation for soft tissue is Answer: increased with tissue
thickness
, ⩥ The acoustic impedance of the matching layer Answer: can be chosen
to improve transmission into the body
⩥ True/False: In a pulse-echo system, the quality factor should be made
as large as possible. Answer: False
⩥ True/False: The beam diameter is constant in the near zone. Answer:
False
⩥ The operating frequency is dependent on Answer: thickness of the
crystal
⩥ The period of an ultrasound wave is Answer: the time of one
wavelength
⩥ The dynamic range of a system is Answer: the ratio of smallest to
largest power level that the system can handle
⩥ True/False: The intensity of an ultrasonic beam can be measured with
radiation force balance. Answer: True
⩥ Increasing the pulse repetition period Answer: increases the maximum
depth that can be imaged
150 QUESTIONS AND CORRECT
ANSWERS 3
⩥ Lateral resolution is dependent on? Answer: beam diameter
⩥ Where does the beam of an unfocused transducer diverge? Answer:
Fraunhofer zone
⩥ Reverberation artifacts are a result of Answer: two or more strong
reflecting surfaces
⩥ True/False: Grating lobes are essential for the proper operation of a
linear phased array. Answer: False
⩥ True/False: Electronically steered scanners always produce higher
resolution images than do mechanically steered scanners. Answer: False
⩥ True/False: An annular array scanner uses mechanical beam steering.
Answer: True
,⩥ True/False: A linear sequenced array cannot be dynamically focused.
Answer: False
⩥ registration or B-mode alignment Answer: Which AIUM test object
function utilizes all the groups of wires in the AIUM 100 mm test
object?
⩥ axial resolution Answer: Which AIUM test object function utilizes the
A group of wires in the AIUM 100 mm test object?
⩥ lateral resolution Answer: Which AIUM test object function utilizes
the B group of wires in the AIUM 100 mm test object?
⩥ dead zone Answer: Which AIUM test object function utilizes the D
group of wires in the AIUM 100 mm test object?
⩥ depth calibration Answer: Which AIUM test object function utilizes
the C or E groups of wires in the AIUM 100 mm test object?
⩥ What happens to axial resolution when spatial pulse length is
decreased? Answer: improves
⩥ How much will a 3.5 MHz pulse be attenuated after passing through 2
cm of soft tissue? Answer: 3.5 dB
,⩥ Propagation speed errors result in Answer: improper axial position
⩥ Enhancement is caused by Answer: weakly attenuating structures
⩥ The Doppler shift frequency is Answer: directly proportional to the
velocity of the reflector
⩥ The number of frames per second necessary for a real-time image to
be flicker free is Answer: more than 15
⩥ True/False: The SPTA intensity will always be larger than the SATA
intensity. Answer: True
⩥ The intensity of the ultrasound beam is usually greater at the focal
zone because of Answer: the smaller beam diameter
⩥ If the amplitude is doubled, the intensity is Answer: quadrupled
⩥ The attenuation for soft tissue is Answer: increased with tissue
thickness
, ⩥ The acoustic impedance of the matching layer Answer: can be chosen
to improve transmission into the body
⩥ True/False: In a pulse-echo system, the quality factor should be made
as large as possible. Answer: False
⩥ True/False: The beam diameter is constant in the near zone. Answer:
False
⩥ The operating frequency is dependent on Answer: thickness of the
crystal
⩥ The period of an ultrasound wave is Answer: the time of one
wavelength
⩥ The dynamic range of a system is Answer: the ratio of smallest to
largest power level that the system can handle
⩥ True/False: The intensity of an ultrasonic beam can be measured with
radiation force balance. Answer: True
⩥ Increasing the pulse repetition period Answer: increases the maximum
depth that can be imaged
