Image Acquisition
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| recorded detail | clarity, resolution, with which anatomic structures are represented in the x-ray image (Radiology Prep, p.298).
🗑
|
||||
| image quality | image density, contrast or gray scale, recorded detail, and distortion (Radiology Prep, p.298).
🗑
|
||||
| geometric factors include: | detail/resolution and distortion, distance, patient factors, focal spot size (Radiology Prep, p.298-308).
🗑
|
||||
| photographic factors include: | motion and intensifying screens (Radiology Prep, p.309-313).
🗑
|
||||
| visibility factors include: | density and contrast (Radiology Prep, p.314-348).
🗑
|
||||
| 2 types of automatic exposure control (AEC) | phototimer and ionization chamber (Radiology Prep, p.349).
🗑
|
||||
| fixed kV technique | chart specifies a particular kV for each body part or type of exam (Radiology Prep, p.352).
🗑
|
||||
| variable kV technique | the mAs is fixed and the kV is increased as part thickness increases (Radiology Prep, p.351).
🗑
|
||||
| digital images require: | large amount of digital storage space, high bandwidth in PACS, and high resolution display monitors (Radiology Prep, p.354).
🗑
|
||||
| pixel | 2-D, picture element, measured in XY direction. pixel pitch is the distance between pixels (Radiology Prep, p.355).
🗑
|
||||
| voxel | 3-D, has depth, volume element, measured in Z direction (Radiology Prep, p.355).
🗑
|
||||
| matrix | number of pixels in XY direction (Radiology Prep, p.355).
🗑
|
||||
| FOV | how much of the part/ patient is included in the matrix (Radiology Prep, p.355).
🗑
|
||||
| pixel size affected by | change in matrix size, and change in FOV (Radiology Prep, p.356).
🗑
|
||||
| CR spatial resolution improves with | smaller pixel pitch, greater pixel/mm, greater sampling frequency (Radiology Prep, p.356).
🗑
|
||||
| functions of digital imaging systems | sensor function, display function, and storage function (Radiology Prep, p.356).
🗑
|
||||
| PSP storage plate layers | protective coat, reflective backing, polyester base support material, antistatic layer, lead foil backing (Radiology Prep, p.359).
🗑
|
||||
| CR resolution increases as | PSP phosphor size decreases, laser beam size decreases, monitor matrix size increases (Radiology Prep, p.363).
🗑
|
||||
| CR features | traditional x-ray equipment, uses IPs and cassettes, display, image preview and post processing (Radiology Prep, p.363).
🗑
|
||||
| DR features | needs new equipment, uses no IPs or cassettes, immediate image display, image preview and post processing, higher DQE or lower patient dose (Radiology Prep, p.363).
🗑
|
||||
| types of artifacts | handling, processing, and exposure (Radiology Prep, p.383).
🗑
|
||||
| information required on each x-ray image | patient name/ identification number, side marker, examination date, institution's name (Radiology Prep, p.384).
🗑
|
||||
| optional information on each x-ray image | patients age or date of birth, attending physician, time of day, radiographer identification (Radiology Prep, p.384).
🗑
|
||||
| film processing steps | developer, fixer, wash, and dryer (Radiology Prep, p.386).
🗑
|
||||
| 3 stages for PSP | x-ray exposure, scanning/ reading, and erasure (Radiology Prep, p.390).
🗑
|
||||
| CR resolution increases as | PSP phosphor size decreases, laser beam size decreases, monitor matrix size increases (Radiology Prep, p.406).
🗑
|
||||
| electronic imaging | brightness changes with window level, contrast changes with widow width, has wide dynamic range/ latitude, fading can occur with delayed processing, IPs are very sensitive to x-ray fog (Radiology Prep, p.407).
🗑
|
||||
| exposure factors | mA, time, kV, and distance (Radiology Prep, p.298).
🗑
|
||||
| factors that affect recorded detail/ resolution | OID, SID, focal spot size, patient factors, intensifying screens, and motion (Radiology Prep, p.298).
🗑
|
||||
| distortion | size distortion (magnification), and shape distortion (elongation. foreshortening) (Radiology Prep, p.298).
🗑
|
||||
| factors that affect distortion | size distortion is affected by OID and SID; shape distortion is affected by alignment of the x-ray tube, anatomic part, and IR (Radiology Prep, p.298).
🗑
|
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:
meechthebeech91
Popular Radiology sets