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Freestyle

RDT 115 - MIDTERMS

Damsel Murakam

12

20 na tanong

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Pampublikong quiz

# 1Multiple Choice
How does the collimation impact the z axis resolution in ct

Nakatago ang lahat ng sagot sa ngayon.

Wider collimation improve z axis resolution
Narrower collimation reduces radiation dose
Narrower collimation enhances z axis resolution
Wider Collimation reduces pitch ratio
# 2Multiple Choice
Which artifacts prevents in alternating brighter and dark dense?
Beam hardening artifact
Aliasing artifact
Zebra artifact
Coupling artifact
# 3Multiple Choice
What is the term of the overlap image data in helical scanning?
Reconstruction interval
Pitch ratio
Overlapping SFOV
Interpolation artifact
# 4Multiple Choice
Which artifacts results from insufficient x ray photon energy in highly attenuating tissues?
Photon starvation artifact
Motion artifact
Aliasing artifact
Ring artifact
# 5Multiple Choice
What technique is used to minimize artifact cause by respiratory motion?
Respiratory Bleeding
Interrogative reconstruction
Shorter scan times
Increase kVp
# 6Multiple Choice
Which reconstruction of algorithms is correct for photon attenuation in ct imaging?
Photon back projection
Interrogative reconstruction
Maximum intensity projection
Surface shaded display
# 7Multiple Choice
Which ct protocol is most appropriate for detecting pulmonary embolism?
Non contrast brain ct
Ct angiography
Virtual fluoroscopy
Low dose chest ct
# 8Multiple Choice
Which factor most influences linearity of ct numbers?
Detector calibration
kVp settings
Window width
Reconstruction algorithm
# 9Multiple Choice
Which reconstruction technique is used to create volume-rendered 3D image?
MIT
SSD
VRT
FBP
# 10Multiple Choice
Which scan mode allows for continuous data acquisition?
Axial mode
Spiral mode
Multiplanar reformatting
2d projection
# 11Multiple Choice
What is the term thin layer of lead inside the ct scanner to shield x rays?
Collimator lining
Radiation shield
Lead housing
Xray attenuator
# 12Multiple Choice
How does a scout image assist in ct imaging?
Measures HU value of soft tissues
Defines scattering and Reduces visibility saddle soft positioning
Determining the pitch ratio
Generates 3d image film view
# 13Multiple Choice
What is the role of kvp in ct imaging?
Controls the x ray beam
Adjustment of scan pitch
Radiation of gantry spin
Determination of slice interval
# 14Multiple Choice
Which CT artifact occurs due to under-sampling during rapid rotation?
Aliasing
photon starvation
streak
cupping artifacts
# 15Multiple Choice
Which plane is reconstructed in coronal reformats?
Anterior posterior
Inferior superior
Mediolateral
Axial
# 16Multiple Choice
What is the main function of gray edge filtering in dual energy ct?
Reduce scan time
Optimize HU values of bone
Differentiating between tissues with similar densities
Reducing photon starvation artifact
# 17Multiple Choice
Which parameters is commonly adjusted to reduce noise while rotating image quality?
Increase pitch
Decrease matrix size
Higher snr
Decrease scan time
# 18Multiple Choice
Which technique minimizes metal artifacts in ct?
Increasing ma and reducing kvp
Using algorithm reconstruction
Narrowing of collimation width
Increasing pitch to 2 is to 1
# 19Multiple Choice
What is the effect of using a wide window width in imaging soft tissues?
Reduces visibility saddle soft positioning tissue differences
Enhances of spatial resolution
Minimizes of photon starvation artifact
Increases temporal resolution
# 20Multiple Choice
What is the main goal of the artifact direction algorithm in ct?
Enhance of spatial resolution
Reduce noise without increasing dose
Correct formation motion
Eliminate HU value discrepancies
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