Equipment. Chap 6. X-ray tube
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| Modern x-ray tube? First tube? | show 🗑
|
||||
| filaments are usually made of _________. Why? | show 🗑
|
||||
| x-ray tube current is adjusted by controlling the _______ _______. | show 🗑
|
||||
| Space charge is | show 🗑
|
||||
| show | 300 mA or less for small, 400 mA or more for larger
🗑
|
||||
| show | .1-1mm. .3-2mm.
🗑
|
||||
| show | receives e-/target, conducts electricity, thermal dissipater.
🗑
|
||||
| most rotating anodes revolve at 3400 rpm. High capacity rotates at | show 🗑
|
||||
| show | W, 74, 69, 3400 degrees C.
🗑
|
||||
| What is the stem of the anode made of? | show 🗑
|
||||
| show | electromagnetic induction motor, consists of anode and stator.
🗑
|
||||
| Stator is _________, rotor is _______. | show 🗑
|
||||
| show | 12 (normal is between 7-20)
🗑
|
||||
| What is the focal spot? What is the effective focal spot? | show 🗑
|
||||
| show | concentrated onto a smaller spot... not good.
🗑
|
||||
| show | By angling the target, one makes the effective focal of the target smaller than the actual focal spot.
🗑
|
||||
| When the target angle is made smaller, the effective focal spot size..... | show 🗑
|
||||
| show | the intensity of x-rays that are emitted through "heel" of the target is reduced because they have a longer path through the target and therefore increased absorption. (Steeper the angle the larger the heel effect.. cathode more intense than anode side)
🗑
|
||||
| show | heel effect
🗑
|
||||
| In chest rad, the cathode should always be _____. In abdominal, the cathode should be _____. | show 🗑
|
||||
| show | anode
🗑
|
||||
| show | effective, anode
🗑
|
||||
| Transfer of energy from one area of an object to another is termed | show 🗑
|
||||
| show | convection
🗑
|
||||
| 3 types of x-ray tube rating charts: | show 🗑
|
||||
| Which chart is the most important because it conveys which techniques are safe and which are unsafe for tube operation. | show 🗑
|
||||
| show | HU= kVp x mA x s = 0.7J
🗑
|
||||
| show | HU= 98kVp x 120mAs = 11,760 HU
🗑
|
||||
| Three phase/high frequency heat unit formula? | show 🗑
|
||||
| show | one
🗑
|
||||
| show | HU = 1.4 x 82 kVp x 120 mAs =13,776 HU. =6 x 13,776 HU = 82,565 HU
🗑
|
||||
| The thermal capacity of an anode and its heat dissipation characteristics are contained in a rating chart called | show 🗑
|
||||
| Protective housing of a tube has 3 purposes: | show 🗑
|
||||
| How many heat units are generated by an exposure of 70 kVp, 300 mA, and 0.1 second on a 1f rectified unit? | show 🗑
|
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:
Zoest35
Popular Radiology sets