DAVIES SPI REVIEW 2026 1704 QUESTIONS
ANSWERS VERIFIED COMPREHENSIVE
STUDY PACKAGE GRADED A+
⩥ What component is necessary for a real-time B-mode scanner but is
not present in A-mode scanner?
A. Clock
B. Transmitter
C. Transducer
D. Scan converter
E. Receiver.
Answer: D. Scan converter
⩥ Preprocessing functions may be defined as:
A. Any function that can be performed on a frozen image
B. A function that takes place in the beam former and is not controllable
by the operator
C. A function that allows increased focusing of the sound beam
D. A function that is performed before the echo data are stored in
memory
,E. Any function that changes the quality of the ultrasound image.
Answer: D. A function that is performed before the echo data are stored
in memory
<Any function that occurs after this point is referred to as
postprocessing. The easiest way to distinguish pre- and postprocessing
functions is this: If it can't be performed on a frozen image, it is
preprocessing; if it can be performed on a frozen image, it is
postprocessing>
⩥ You have decreased the scan line density. What technique will be
employed to fill in the empt data between the scan lines?
A. Interpolation
B. Rejection
C. Compression
D. Autocorrelation
E. Demodulation.
Answer: A. Interpolation
<Interpolation is used to fill in the missing data between scan lines in
both gray-scale and color Doppler. The missing data are estimated from
the data present in nearby pixels on adjacent scan lines>
,⩥ Which of the following ultrasound examinations would require the
highest frame rate?
A. Small parts
B. Abdominal
C. Pelvic
D. Vascular
E. Cardiac.
Answer: E. Cardiac
<Since the heart is a rapidly moving structure, high frame rates are
required to assess it accurately>
⩥ A-mode display is most commonly used for what type of ultrasound
imaging?
A. Small parts
B. Abdominal
C. Cardiac
D. Vascular
E. Ophthalmologic.
Answer: E. Ophthalmologic
, ⩥ The spatial resolution of the scan converter is determined by:
A. Number of pixels in the scan converter matrix
B. Number of bits per pixel
C. The postprocessing settings
D. Brightness and contrast settings of the monitor
E. Interpolation scheme.
Answer: A. Number of pixels in the scan converter matrix
<A matrix of 512 x 512 pixels is capable of much better spatial
resolution than a similarly sized matrix containing only 64 x 64 pixels.
In the latter example, the image would appear blocky with discrete
square-shaped segments. Image resolution would be degraded>
⩥ A type of sonographic imaging that transmits two pulses of opposite
phase in rapid succession so they can be cancelled out upon reception is
termed:
A. Pulse inversion harmonics
B. Compound imaging
C. Speckle reduction imaging
D. Tomographic imaging
E. Panoramic imaging.
ANSWERS VERIFIED COMPREHENSIVE
STUDY PACKAGE GRADED A+
⩥ What component is necessary for a real-time B-mode scanner but is
not present in A-mode scanner?
A. Clock
B. Transmitter
C. Transducer
D. Scan converter
E. Receiver.
Answer: D. Scan converter
⩥ Preprocessing functions may be defined as:
A. Any function that can be performed on a frozen image
B. A function that takes place in the beam former and is not controllable
by the operator
C. A function that allows increased focusing of the sound beam
D. A function that is performed before the echo data are stored in
memory
,E. Any function that changes the quality of the ultrasound image.
Answer: D. A function that is performed before the echo data are stored
in memory
<Any function that occurs after this point is referred to as
postprocessing. The easiest way to distinguish pre- and postprocessing
functions is this: If it can't be performed on a frozen image, it is
preprocessing; if it can be performed on a frozen image, it is
postprocessing>
⩥ You have decreased the scan line density. What technique will be
employed to fill in the empt data between the scan lines?
A. Interpolation
B. Rejection
C. Compression
D. Autocorrelation
E. Demodulation.
Answer: A. Interpolation
<Interpolation is used to fill in the missing data between scan lines in
both gray-scale and color Doppler. The missing data are estimated from
the data present in nearby pixels on adjacent scan lines>
,⩥ Which of the following ultrasound examinations would require the
highest frame rate?
A. Small parts
B. Abdominal
C. Pelvic
D. Vascular
E. Cardiac.
Answer: E. Cardiac
<Since the heart is a rapidly moving structure, high frame rates are
required to assess it accurately>
⩥ A-mode display is most commonly used for what type of ultrasound
imaging?
A. Small parts
B. Abdominal
C. Cardiac
D. Vascular
E. Ophthalmologic.
Answer: E. Ophthalmologic
, ⩥ The spatial resolution of the scan converter is determined by:
A. Number of pixels in the scan converter matrix
B. Number of bits per pixel
C. The postprocessing settings
D. Brightness and contrast settings of the monitor
E. Interpolation scheme.
Answer: A. Number of pixels in the scan converter matrix
<A matrix of 512 x 512 pixels is capable of much better spatial
resolution than a similarly sized matrix containing only 64 x 64 pixels.
In the latter example, the image would appear blocky with discrete
square-shaped segments. Image resolution would be degraded>
⩥ A type of sonographic imaging that transmits two pulses of opposite
phase in rapid succession so they can be cancelled out upon reception is
termed:
A. Pulse inversion harmonics
B. Compound imaging
C. Speckle reduction imaging
D. Tomographic imaging
E. Panoramic imaging.
