What is a characteristic of read magnification in image processing?

SPI Review Part 3

Quiz
•
Health Sciences
•
12th Grade
•
Hard
Momo's Class
FREE Resource
84 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Rescans and acquires new data
Reads old data
Increases line density
Improves spatial resolution
Answer explanation
Read magnification utilizes existing data to enhance the image display without rescanning. This means it reads old data, making it the correct choice, while other options imply new data acquisition or improvements that don't apply.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which type of magnification can improve temporal resolution if the region of interest is shallower?
Read magnification
Write magnification
Both read and write magnification
Neither read nor write magnification
Answer explanation
Write magnification enhances temporal resolution by focusing on a shallower region, allowing for faster image acquisition and improved detail in dynamic studies, unlike read magnification which does not affect temporal aspects.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In write magnification, what happens if the pixel size is unchanged?
Number of pixels decreases
Number of pixels increases
Spatial resolution decreases
Temporal resolution remains unchanged
Answer explanation
In write magnification, if the pixel size remains unchanged, the number of pixels increases to maintain detail, leading to higher pixel density. Thus, the correct answer is that the number of pixels increases.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the appearance of speckle in tissues?
Smooth and uniform
Grainy or granular
Bright and clear
Dark and shadowy
Answer explanation
Speckle in tissues appears grainy or granular due to the interference patterns created by scattered ultrasound waves. This texture is characteristic of the echogenicity of the tissue, distinguishing it from smooth or clear appearances.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What causes speckle in imaging artifacts?
Reflection of light
Refraction of sound
Interference effects of scattered sound
Absorption of heat
Answer explanation
Speckle in imaging artifacts is primarily caused by interference effects of scattered sound. This phenomenon occurs when sound waves scatter off small particles, creating a pattern of constructive and destructive interference.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the effect of speckle on image quality?
Enhances image contrast
Reduces image contrast and spatial resolution
Improves diagnostic accuracy
Increases image brightness
Answer explanation
Speckle reduces image contrast and spatial resolution by introducing noise, which can obscure fine details and make it harder to distinguish between different structures in the image.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is clutter in Doppler artifact?
Strong reflections from blood cells
Weak reflections from anatomic structures
Strong reflections from anatomic structures
Weak reflections from blood cells
Answer explanation
Clutter in Doppler artifact refers to strong reflections from anatomic structures, which can obscure the true Doppler signals from blood flow. This is why the correct answer is 'Strong reflections from anatomic structures'.
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