Marys Q4 ImgEqS22
Help!
|
|
||||
|---|---|---|---|---|---|
| The ratio of incident x-rays on the input phosphor to light photons exiting the output phosphor is called ____gain | Flux
🗑
|
||||
| A charge-coupled device used in digital fluoroscopy provides high | Spatial resolution, S/N ratio, DQE
🗑
|
||||
| The ___in the retina are stimulated by ___light, the ___are stimulated by ___light | rods, low, cones, bright
🗑
|
||||
| Brightness gain is typically in the range of_____ | 5,000-30,000
🗑
|
||||
| Fluoroscopy for an air contrast barium enema is generally done at ____kVp | 80-90
🗑
|
||||
| Digital fluoroscopic rate is lower than that for continuous analog fluoroscopy-T/F | True
🗑
|
||||
| Digital fluoroscopy with a charge-couple device has lower ____and higher ____ than conventional fluoroscopy | patient dose, light sensitivity
🗑
|
||||
| What factor increases when the kinetic energy across the image intensifier increases | Voltage
🗑
|
||||
| What affect will using a smaller input phosphor have on magnification | increase
🗑
|
||||
| What affect will using a smaller input phosphor have on detail | increase
🗑
|
||||
| The combination of temporal and energy subtraction techniques is called ____ | Hybrid subtraction
🗑
|
||||
| The kinetic energy of photoelectrons in the image intensifier is greatly increased by the ____ | potential difference across the tube
🗑
|
||||
| The output phosphor of the image intensifier is composed of | zinc cadmium sulfide
🗑
|
||||
| The time it takes to turn on the digital fluoroscopy x-ray tube and reach selected mA and kVp is the ____time | Interrogation
🗑
|
||||
| Fluoroscopy was developed so that radiologists could view ____images | dynamic
🗑
|
||||
| Electrons hit the ____after exiting the anode | output phosphor
🗑
|
||||
| The ___in the image intensifier emits electrons when it's stimulated by light photons | Photocathode
🗑
|
||||
| The ____is the product of minification gain and flux gain | brightness gain
🗑
|
||||
| Who invented the fluoroscope | Thomas Edison
🗑
|
||||
| With image intensification the light level is raised to____vision | Photopic
🗑
|
||||
| x-rays that exit the patient and enter the image intensifier first interact with the ___ | input phosphor
🗑
|
||||
| Viewing the fluoroscopic image in magnification mode increases___ | contrast resolution, spatial resolution, and patient dose
🗑
|
||||
| What affect will using magnification have on dose | increase
🗑
|
||||
| An image intensifier tube is identified by the diameter of its___ | input phosphor
🗑
|
||||
| The image intensifier improved fluoroscopy by increasing image____ | brightness
🗑
|
||||
| What is the milliamperage used during fluoroscopy | 5 mA
🗑
|
||||
| Automatic brightness control maintains the brightness of the image by varying____ | kVp and mA
🗑
|
||||
| The input phosphor converts___to ____ | x-rays, light
🗑
|
||||
| Describe purpose of electrostatic lenses | guides the electrons
🗑
|
||||
| Light produced at the output phosphor of the image intensifier has been increased ___times in intensity | 50-75
🗑
|
||||
| Digital fluoroscopy uses at least ___monitor(s) | 2
🗑
|
||||
| The capability of an image intensifier to increase the illumination level of the image is called its____ | brightness gain
🗑
|
||||
| What is the purpose of fluoroscopy | Image in motion
🗑
|
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:
Levanw