Unit 1 Flashcards
(27 cards)
_______ creates a quantity of necessary radiation energy that is eventually converted to data
mAs
______ functions to provide proper penetration of the radiation quantity for data conversion
kVp
What is the purpose of the PSP Cassette?
To protect the imaging plate it contains
What is the construction of the PSP cassette frame?
- Aluminum
- Plastic and/or steel
Is the front of the PSP cassette radiolucent or radiopaque?
What type of radiation hits the front of the cassette?
Radiolucent
Primary Radiation
Is the back of the PSP cassette radiolucent or radiopaque?
Radiopaque
What is the back of the PSP cassette lined with?
Lined with aluminum
Why is there different material on the back of the PSP cassette?
To absorb the backscatter
Photostimulable Phosphor Plate
The imaging plate has a wider dynamic range which results in _____ _________ ________ than film-screen imaging
Wider exposure latitude
Photostimulable Phosphor Plate
What are the 3 types of Fuji imaging plates?
- Standard
- Resolution
- Long Cassette
What is the imaging plate construction? How many layers are there? List the layers in order starting at the front of the plate
There are 6 layers to the imaging plate construction
- Protective Layer (front)
- Phosphor Layer
- Conductor Layer (provides a ground regarding energy)
- Support Layer
- Light Shield Layer
- Backing Layer
On the imaging plate, what does the front of it look like and what does it do?
Front side is white, contains PSP and hold the latent image
On the imaging plate, what does the back of it look like?
Back side is black with barcode stickers (base)
Imaging Plate Construction
What is the phosphor or active layer made of?
What does it protect from?
Polymer - plastic material
Protects from the mechanical wear from the reader device. Also prevents damage from cleaning solutions or body fluids
Photostimulable Phosphor or PSP is sensitive to what energy?
Sensitive to high intensity laser beam
Imaging Plate Construction
Reflective layer (RL) - required die to isotropic property of light; which means?
Emits light in all directions around it
Imaging Plate Construction
How does the reflective layer (RL) affect spatial resolution?
Increasing quantity the light energy
More it spreads out and the farther it travels, the more blur
Increasing the amount of data kept inside processing system
Imaging Plate Construction
What does BaFX: Eu2 + stand for?
Barium Fluorohalide w/ Europium Activators
Imaging Plate Construction
What is the activator responsible for in the barium fluorohalide w/ europium activators?
Storage aspect of PSL (via luminescence centers of the phosphors)
Imaging Plate Construction
In addition to exit energy from the patient, the phosphor is also sensitive to what type of energy?
Radiation
All forms of energy (ex: heat)
Imaging Plate Construction
Phosphor _______ differ with vendors
shapes
Light diffusion has what effect on spatial resolution?
Light diffusion = less spatial resolution
Imaging Plate Construction
Structured or needle phosphors have columns and produces less light diffusion which means what level of spatial resolution?
Produces less light diffusion = better spatial resolution
Phosphors shaped as a needle
Light emitted as a guide and travels down the needle
Less light diffusion
Imaging Plate Construction
Phosphor or active layer may contain a dye. What is dye?
Dye is seeking to reduce the spread of the light (data)
