Podcast
Questions and Answers
What is the primary function of the conductive layer in the imaging plate?
What is the primary function of the conductive layer in the imaging plate?
- To absorb and reduce static electricity (correct)
- To reflect emitted light in a forward direction
- To trap electrons during exposure
- To minimize the light spread
What is the purpose of the dye added to the phosphor layer in the imaging plate?
What is the purpose of the dye added to the phosphor layer in the imaging plate?
- To reduce the spread of stimulating light (correct)
- To increase the sensitivity of the phosphor layer
- To increase the emission of light
- To enhance the absorption of stimulating light
What is the function of the reflective layer in the imaging plate?
What is the function of the reflective layer in the imaging plate?
- To send light in a forward direction when released in the cassette reader (correct)
- To protect the phosphor layer from mechanical damage
- To absorb and reduce static electricity
- To trap electrons during exposure
What is the purpose of the barcode label on the cassette?
What is the purpose of the barcode label on the cassette?
What is the primary function of the antistatic material in the cassette?
What is the primary function of the antistatic material in the cassette?
What is the primary function of the aluminum or lead sheet in a PSP cassette?
What is the primary function of the aluminum or lead sheet in a PSP cassette?
What takes the place of radiographic film in cassette-based PSP systems?
What takes the place of radiographic film in cassette-based PSP systems?
During the reading process, what happens to the stored light in the phosphor?
During the reading process, what happens to the stored light in the phosphor?
What is the main difference between cassette-based and cassette-less PSP systems?
What is the main difference between cassette-based and cassette-less PSP systems?
Why is a basic understanding of PSP important for technologists?
Why is a basic understanding of PSP important for technologists?
Study Notes
Digital Radiographic Image Acquisition and Processing
- Digital radiographic image acquisition and processing refers to the different ways of acquiring and processing digital radiographic images.
Photostimulable Phosphor (PSP) Systems
- PSP systems are a method of acquiring and processing digital radiographic images.
- PSP systems can be either cassette-based or cassette-less in design.
Key Topics in PSP Technology
- Technical factors
- Equipment selection
- Exposure indicators
- Image data recognition
- Artifacts
Radiographic vs. Other Digital Modalities
- Radiographic refers to general X-ray procedures, distinct from other digital modalities such as:
- Computed Tomography (CT)
- Magnetic Resonance Imaging (MRI)
- Ultrasound (US)
PSP Technology Basics
- PSP technology stores an image formed by incident X-ray photon excitation of phosphors on an imaging plate.
- The imaging plate takes the place of radiographic film.
- During the reading process, the phosphor releases the stored light and converts it into an electrical signal, which is then digitized.
Cassette-Based PSP Systems
- The cassette is a lightproof container that protects the imaging plate from light and handling.
- The cassette contains:
- A durable, lightweight plastic material
- A thin sheet of aluminum or lead that absorbs backscatter X-ray photons
- An antistatic material (usually felt) to protect against static electricity buildup, dust collection, and mechanical damage to the plate
Imaging Plate Construction
- The imaging plate consists of several layers:
- Protective layer
- Phosphor layer (or active layer)
- Reflective layer
- Conductive layer
- Color layer (in newer plates)
- Support layer
- Backing layer
Cassette-Based PSP System Features
- A window with a barcode label or barcode sticker on the cassette allows the technologist to match the image information with the patient-identifying barcode on the examination request.
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Description
Learn about digital radiographic image acquisition and processing, including photostimulable phosphor (PSP) systems, technical factors, and equipment selection. Understand how to acquire an image using PSP technology and more.
