Module 1
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| show | Remnant Beam
🗑
|
||||
| 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
🗑
|
||||
| show | Remnant x-ray beam; Light
🗑
|
||||
| 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 🗑
|
||||
| With an analog IR, the image created on the film directly after exposure is the ______________ image. The film must be ______________ to create the ___________ image. | show 🗑
|
||||
| show | Quantization
🗑
|
||||
| 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 🗑
|
||||
| show | Bit; Binary Digit
🗑
|
||||
| A _______ is a string of _____ bits, also referred to as a ________. | show 🗑
|
||||
| show | Bit Depth
🗑
|
||||
| If 6 bits are available for the bit depth, there will be ______ shades of gray that can be represented. 8 bits would mean that there could be _______ shades of gray that can be represented. | show 🗑
|
||||
| show | 8 bits
🗑
|
||||
| show | Side to side; Center; Center of an adjacent pixel
🗑
|
||||
| show | Recorded Detail
🗑
|
||||
| As the size of the pixel decreases the ____________ ___________ will ____________. | show 🗑
|
||||
| As the size of the pixel increases the ____________ ____________ will __________. | show 🗑
|
||||
| The typical matrix size for radiography may be _________ x _______ with a bit depth of _______. A CT scan would have a matrix size of ______x_______ with a bit depth of _____. | show 🗑
|
||||
| show | 1)Photostimulable Phosphor (PSP); 2)Flat panel with a thin-film transistor (TFT); 3) Charge-Coupled Device (CCD); 4)Complementary Metal Oxide Semiconductor (CMOS)
🗑
|
||||
| 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
🗑
|
||||
| __________ __________ is the measure of a percentage of energy that strikes a receptor material that is actually absorbed by the receptor. | show 🗑
|
||||
| __________ __________ is the percentage of energy absorbed by a receptor that is converted to usable output. | show 🗑
|
||||
| This is the product of the amount of energy absorbed and the amount of energy converted to useful output. | show 🗑
|
||||
| PSP Image Plates are scanned by a _________ _________ ___________ to extract the image data by causing electrons at high energy states to release their energy as a _________ ___________. | show 🗑
|
||||
| What happens to the electrons in a PSP image plate after it is scanned and releases the energy from the X-ray beam? | show 🗑
|
||||
| Thin Film Transistors in a _________-________ plate collects ___________ emitted from ___________ ___________ or ___________ ___________. | show 🗑
|
||||
| The Thin-Film Transistor in a flat-panel image plate collects the released electrons in an area of the circuit assembly called ___________ ___________ or _______. | show 🗑
|
||||
| The x-ray beam contains photons of varying energies and pass through varying densities of body tissue to the image receptor. What are these nonuniform, nonuseful variations that are captured that do not add to the useful information? | show 🗑
|
||||
| The measure of the useful information captured to the nonuseful, random variations captured is referred to as the _________ to ___________ ratio. | show 🗑
|
||||
| An advantage of CCD Receptors is that they respond to _________ _______ _________ from a scintillator than other types of receptors. | show 🗑
|
||||
| CCD's are suitable for _____-________ imaging and also produce images ___________ and will ____________ ___________ for the next image. | show 🗑
|
||||
| show | Fluoroscopic
🗑
|
||||
| __________ is a measure of an image receptor's ability to create an output signal that accurately represents the input signal of the x-ray beam exiting the patient. | show 🗑
|
||||
| A higher DQE indicates that a receptor is _________ efficient in converting the input x-ray signal and this means that a __________ exposure is required to create an optimal image. | show 🗑
|
||||
| The ability to distinguish small objects adjacent to each other is __________ _________ and is measured in a unit called ______________. | show 🗑
|
||||
| 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 🗑
|
||||
| show | Electrons; DELs; Thin-Film Transistors
🗑
|
||||
| show | 50 micron DELs provide better spatial resolution than a 200 micron DEL.
🗑
|
||||
| 1) 200 micron DELs will provide what kind of spatial resolution? (2) 100 micron DELs? (3) 50 micron DELs? | show 🗑
|
||||
| The Nyquist Theorem states that for a desired spatial resolution with PSP sampling frequency that ________ the number of pixels must be sampled to display the desired line pairs per mm. | show 🗑
|
||||
| show | 5; 10
🗑
|
||||
| Digital Receptors can produce an image that appears acceptable on a display monitor from _______ % underexposure through to _______% overexposure. | show 🗑
|
||||
| show | Mottled or Noisy
🗑
|
||||
| When an image is overexposed by 100% to 200% of the desired value the image will have a loss of __________ and all parts will appear uniformly ____________. | show 🗑
|
||||
| show | Equipment
🗑
|
||||
| What are the 3 sources of image blur? | show 🗑
|
||||
| The 3 geometric factors affecting geometric blur: | show 🗑
|
||||
| During fluoroscopy, in order to magnify an image the __________ phosphor is __________ and the ___________ phosphor is ___________. | show 🗑
|
||||
| These IR's use TFTs: | show 🗑
|
||||
| These Flat Panel Detectors are "Direct Image Capture" devices which means what? | show 🗑
|
||||
| show | Scintillation & uses Amorphous Silicon
🗑
|
||||
| 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