Module 1
Help!
|
|
||||
---|---|---|---|---|---|
Which X-ray beam contains the useful or diagnostic information that is transferred to the image receptor? | show 🗑
|
||||
What is a major advantage of digital imaging over analog? | show 🗑
|
||||
show | 1)Allows us to see structures that would have previously required additional imaging; 2)Radiologists can manipulate the image to see structures differently; 3)Making multiple copies is simple; 4)Can be electronically distributed
🗑
|
||||
In an analog image receptor, the intensifying screen converts the __________ _______ _______ exiting the patient into __________. | show 🗑
|
||||
With an analog IR, the _______ is the recording device and uses the x-rays reaching the _________ and __________ produced by the intensifying screen to create the image. | show 🗑
|
||||
show | Latent; Processed; Manifest
🗑
|
||||
During Analog to Digital Conversion (ADC) the process of assigning numeric values to the analog output signal of the photo detector is termed ________________. | show 🗑
|
||||
The quantization of the analog signal to numeric values determines the __________ levels of the image. | show 🗑
|
||||
Binary language consists of a system of ______ symbols, either a _____ or _____ to manage data. | show 🗑
|
||||
Each number in binary language is called a _______, short for __________ _________. | show 🗑
|
||||
A _______ is a string of _____ bits, also referred to as a ________. | show 🗑
|
||||
show | Bit Depth
🗑
|
||||
show | 64; 256
🗑
|
||||
show | 8 bits
🗑
|
||||
show | Side to side; Center; Center of an adjacent pixel
🗑
|
||||
The size of each pixel within a matrix determines ___________ ___________. | show 🗑
|
||||
show | Recorded Detail will Increase
🗑
|
||||
show | Recorded detail will decrease
🗑
|
||||
show | 3000 x 3000; 12; 512 x 512; 16
🗑
|
||||
Name the 4 types of digital image receptors: | show 🗑
|
||||
Flat-Panel detectors with thin-film transistors can either be __________-based or _______________-based. | show 🗑
|
||||
____________: The ability of certain materials to respond to excitation and give off light. | show 🗑
|
||||
show | 1)Absorption Efficiency 2)Conversion Efficiency 3)Detective Quantum Efficiency
🗑
|
||||
show | Absorption Efficiency
🗑
|
||||
show | Conversion Efficiency
🗑
|
||||
show | Detective Quantum Efficiency
🗑
|
||||
show | Red Laser Light; Blue light
🗑
|
||||
What happens to the electrons in a PSP image plate after it is scanned and releases the energy from the X-ray beam? | show 🗑
|
||||
show | Flat-Panel; Electrons; Amorphous Selenium or Amorphous Silicon
🗑
|
||||
The Thin-Film Transistor in a flat-panel image plate collects the released electrons in an area of the circuit assembly called ___________ ___________ or _______. | show 🗑
|
||||
show | Noise
🗑
|
||||
The measure of the useful information captured to the nonuseful, random variations captured is referred to as the _________ to ___________ ratio. | show 🗑
|
||||
show | Lower Light Levels
🗑
|
||||
show | Low-Dose imaging; Quickly; Instantly Refresh
🗑
|
||||
show | Fluoroscopic
🗑
|
||||
show | DQE
🗑
|
||||
show | More Efficient; Lower
🗑
|
||||
show | Spatial Resolution; Line Pairs per mm
🗑
|
||||
show | Line Pairs Per millimeter
🗑
|
||||
show | PSP; Pixel; Spatial Resolution
🗑
|
||||
Lower sampling frequencies for a PSP plate reader means that __________ samples are taken and a __________ pixel size which will result in ___________ spatial resolution. | show 🗑
|
||||
Sampling frequencies for PSP readers can range from _______ pixels per mm to _______ pixels per mm. The _______ pixels per mm provides better spatial resolution. | show 🗑
|
||||
With Flat Panel Detectors (FPD) ___________ are collected in the ______s of the _______-________ _________. | show 🗑
|
||||
Thinking of the DELs in a Flat Panel Detector as a pixel: A DEL size that collects 50 microns compared to a DEL size that collects 200 microns will provide what kind of spatial resolution? | show 🗑
|
||||
show | (1) 2.5 Line pairs/mm (2) 5 Line pairs/mm (3) 10 Line pairs/mm
🗑
|
||||
show | Twice
🗑
|
||||
show | 5; 10
🗑
|
||||
Digital Receptors can produce an image that appears acceptable on a display monitor from _______ % underexposure through to _______% overexposure. | show 🗑
|
||||
To determine incorrect exposure values on a digital image, a technologist should be able to determine underexposure of less than 50% of the desired mAs because the image will look _________ or ___________. | show 🗑
|
||||
show | Contrast; Penetrated (saturated)
🗑
|
||||
show | Equipment
🗑
|
||||
What are the 3 sources of image blur? | show 🗑
|
||||
show | FSS, SID, OID
🗑
|
||||
show | Input phosphor is decreased / Output phosphor remains the same.
🗑
|
||||
These IR's use TFTs: | show 🗑
|
||||
These Flat Panel Detectors are "Direct Image Capture" devices which means what? | show 🗑
|
||||
The Flat Panel Detector that requires an extra step to convert light to electrons are what type of scintillation and uses amorphous ___________. | show 🗑
|
||||
show | Cesium Iodide or Gadolinium Oxysulfide: Converts X-ray photons to light; Amorphous Silicon converts light to electrons
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
foster1317
Popular Radiology sets