California Fluoroscopy Test Bank 586 Questions and Correct Answers (Already Graded A+)
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Course
California Fluoroscopy
Institution
California Fluoroscopy
California Fluoroscopy Test Bank 586 Questions and Correct Answers (Already Graded A+)
Five major categories covered under HIPAA - Answer Insurance portability
Administrative simplification
Medical savings and tax deductions
Group health plan provisions
Revenue offset provisions
When w...
California Fluoroscopy Test Bank
586 Questions and Correct
Answers (Already Graded A+)
Five major categories covered under HIPAA - Answer ✔ Insurance portability
Administrative simplification
Medical savings and tax deductions
Group health plan provisions
Revenue offset provisions
When was HIPPA enacted - Answer ✔ Signed into law in 1996
Regulates privacy of patient health information
Health Integrity and Protection Data Bank (HIPDB): - Answer ✔ national data bank
collects reports and disclosure of actions taken
Wireless local area networks (WLANs): - Answer ✔ communication system used to
access patient records from central databases
Medical informatics: - Answer ✔ application of communication and information to
medical practice, research, and education
Telemedicine: - Answer ✔ use of communication and information technologies to
provide health care services to people at a distance
What is a matrix created by - Answer ✔ Pixels arranged into rows and columns
How is the matrix sized determined - Answer ✔ By number of pixels
What is the smallest element in a digital image - Answer ✔ The pixel
Smaller pixels increase what - Answer ✔ Visibility of smaller structures
Increases recorded detail
Smaller pixel size will result in - Answer ✔ Larger matrix size and increased spatial
resolution
,How is spatial resolution effected by matrix size - Answer ✔ The larger the matrix size
increases spatial resolution
Pixel bit depth determines - Answer ✔ The numbers of shades of gray that can be
displayed
Digital fluoro spatial resolution is determined by - Answer ✔ Image Matrix and input size
of the ii
Image Matrix - Answer ✔ Consists of pixels arranged into rows and columns
What determines spatial resolution in a digital image - Answer ✔ Size and density of
pixels
Spatial resolution is not related to - Answer ✔ The amount of exposure
What determines spatial resolution - Answer ✔ Pixel size
Define Signal to Noise Ratio - Answer ✔ The amount of image forming signal to
inherent noise in any electronic system
What effects Digital File Size - Answer ✔ Larger Matrix, Increasing pixel bit depth
Lossless image compression - Answer ✔ Larger file sizes with no loss of resolution
Lossy Image Compression - Answer ✔ Smaller file size with resulting loss of resolution
DF is configured to capture light from the output phosphor in two ways - Answer ✔
Analog to Digital Converter
CCD
What is the function of a ADC - Answer ✔ Converts video signal from analog TV camera
to digital data
What is sampling - Answer ✔ Process of digitizing an analog signal requires dividing the
continuous signal into discrete parts
What is Quantization - Answer ✔ Each sample of a signal is quantized
On the displayed image each pixel is a visual representation of - Answer ✔ Sampling
and quantization
Common matrix sizes for DF - Answer ✔ 512x512 or 1024x1024
,In DF the computer operates with - Answer ✔ Digitized data it received from the ADC in
a matrix format
The CCD is optically coupled to what - Answer ✔ The Output phospor of the ii
Are sampled charges from the CCD Analog or Digital? - Answer ✔ Analog and must be
digitized using a analog to digital converter
What size are most CCD Sensors - Answer ✔ 100mm x 100mm
CCD has greater sensitivity to light which is called - Answer ✔ Detective Quantum
Efficiency
CCD has what type of response Curve - Answer ✔ Linear-Provides improved dynamic
range and better contrast resolution
CCD image acquisition rates can range from - Answer ✔ 1 to 10 frames per second
Name two types of dynamic detectors - Answer ✔ Indirect digital detector
Direct digital detector
How does a Indirect Digital Detector work? - Answer ✔ 1. Scintillators create visible light
when absorbing x ray energy 2.Quantify light into proportional electronic charge
How does a Direct digital detector work? - Answer ✔ Directly converts incoming x-ray
energy to proportional electronic signal
Indirect Digital Detector emits light - Answer ✔ Isotopically which will reduce spatial
resolution
Each photodiode represents - Answer ✔ A pixel or picture element
Indirect Digital Detector cannot - Answer ✔ directly convert x-rays into an electric signal
The Detector Element DEL is - Answer ✔ a type of storage capacitor, that holds
electronic charge until transferred to the computer
Advantages of FPIR - Answer ✔ Distortion Free
Constant image quality
Impoved contrast resolution
High DQE
Unaffected by external magnetic fields
Moire Artifact - Answer ✔ Grid must be diagonal to the detector for FPD
, __________use continous x-ray output with an analog video camera as the receptor of
the virtual Image - Answer ✔ Conventional Fluoroscopy
Digital x-ray generators are - Answer ✔ 3 phased
High Frequency
How does the generator work in Pulse Progressive Fluoroscopy - Answer ✔ Generator
switching x-ray beam on and off
What mA does the DF fluoro operate at - Answer ✔ 100-1000's mA
What is DF image acquisition time - Answer ✔ 33ms image acquisition time per frame
Interrogation Time - Answer ✔ Time required for the x-ray tube to achieve full kvp,mA
and produce x-rays
Extinction Time - Answer ✔ Time for x-ray tube to be switched off, <1 msec
Duty cycle - Answer ✔ Fraction of time x-ray tube is energized and producing radiation
Temporal Subtraction - Answer ✔ Image obtained at one point in time and subtracted
from image obtained at a later time
An image intensifiers photocathode causes ___ to be given off in direct proportion to the
intensity of the fluorescent light:
a. remnant radiation
b. electrons
c. x-rays
d. light photons - Answer ✔ electrons
What fluoroscopic television system device decodes the video signal into a visible
image?
a. Vidicon camera
b. Camera control unit
c. Television monitor
d. Electron gun - Answer ✔ Television Monitor
Which of the following materials are used in the construction of a fluoroscopic tabletop?
1. Lead
2. Aluminum
3. Bakelite
4. Carbon fiber - Answer ✔ 2, 3, and 4
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