10 Questions – Sonography Principles and Instrumentation Practice Exam

Principles and Instrumentation (SPI)

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Question 1
If an inpatient is brought to the Ultrasound department for an exam and does not have an ID bracelet what is the correct procedure?
A
Verify with the patient 2 separate patient identifiers.
B
Perform the exam but notify the charge nurse about the situation.
C
Verify patient identification with a family member.
D
Postpone exam until correct identification may be obtained.
Question 1 Explanation: 
The identification of the patient has two purposes: firstly, to safely determine the individual as being the legitimate receiver of the treatment or procedure; secondly, to ensure that the procedure to be undertaken is effectively that which the patient needs. The word here that determines your course of action is "inpatient", with an inpatient determining identity is different than with an outpatient. Inpatients don't tend to carry ID with them so they are identified during the admitting process. This is why ID bands are so important.
Question 2
λ = c/f is what equation?
A
Speed of a wave.
B
Amplitude of a wave.
C
Time of a wave.
D
Wavelength
Question 2 Explanation: 
λ (mm) = c (propagation speed mm/us) divided by f (MHz)
Question 3
What denotes the distance for a wave to complete a cycle?
A
Frequency
B
Wavelength
C
Cycle
D
Period
Question 3 Explanation: 
How far does the wave travel before it starts a new cycle. If it goes farther, longer wavelength, your frequency will be less. Takes longer for a wave to complete so you can't make as many.
Question 4
An US pulse has a PRP of 0.8 msec, a spatial pulse length of 2.0 mm and a wavelength of 2.0 mm. What is the longitudinal resolution of the system?
A
0.4 mm
B
0.5 mm
C
0.3 mm
D
1.0 mm
Question 4 Explanation: 
The equation for LARD Resolution is SPL / 2
Question 5
Which of the following will improve a system's temporal resolution?
A
Increased line density.
B
Increased PRF.
C
Increased sector angle.
D
Increased frequency.
Question 6
Side lobes usually display which artifact?
A
Reflectors appearing in improper locations on the image.
B
The bending of the sound beam due to difference in acoustic impedance.
C
Reflectors appearing too deep on the image.
D
Hollow structure's appearing anechoic on the image.
Question 7
What is the characteristic of a shadowing artifact?
A
Reflections are placed in multiple positions in the image
B
Reflectors are absent on the image
C
Structures are placed in an improper lateral position on the image
D
Structures appear too deep on the image
Question 8
When the ultrasound machine has a high frame rate...
A
The number of scan lines has increased
B
The system images moving structures poorly
C
The system images moving structures well
D
There are more scan lines than usual
Question 8 Explanation: 
When scanning you would notice a high frame rate because your image would move quickly. This happens when there are few focal zones and a minimal depth. It takes a lot of time to create each frame if you have many focal zones or are imaging at depth. So the rate will be high if you have a shallow structure and only use a single focal zone.
Question 9
What is comet tail artifact's fundamental mechanism of formation?
A
Refraction
B
Rarefaction
C
Redirection
D
Reflection
Hint:
Mirror image and comet tail are also reflection related artifacts.
Question 10
With a transducer that produces a 5 cm wide image and has 100 scan lines, the line density is what?
A
20/cm (20 lines per cm)
B
50/cm (50 lines per cm)
C
200/cm (200 lines per cm)
D
5/cm (5 lines per cm)
Question 10 Explanation: 
If you have an image that is 5 cm wide and has 100 scan lines you just divide the width by the total number of scan lines. 100 lines / 5 cm = 20 lines / cm
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      • Elaine Covaleski says:

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  5. Allan Tovar says:

    I am 21 yrs old i finished th eultrasound program in 2010 when i was 19 i have fallen off the wagon of studying this do to a lack of jobs available! but can anyone spare some notes and hints? i would appriciate it alot!