Radiation Measures
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help
|
|
||||
|---|---|---|---|---|---|
| Gray | Absorbed dose | ||||
| Sievert | Dose equivalent (replaces REM) | ||||
| REM | Dose equivalent (occupational exposure) | ||||
| Curie | Original unit of radioactivity. | ||||
| Becquerel | Unit of radioactive decay | ||||
| Roentgen | Unit of exposure dose in air of x-rays. | ||||
| Rad | Absorbed dose (Patient Dose) | ||||
| A.L.A.R.A. | As Low As Reasonably Achievable | ||||
| The 3 Cardinal Rules of Rad Protection are: | Time, Distance and Shielding | ||||
| What are 3 Radiation sources? | Natural (cosmic rays, terrestrial), Industrial (Nuclear fuel, cosumer products) and Medical (x-rays, nuclear treatment) | ||||
| Distortion | Misrepresentation of size or shape of any anatomic structure | ||||
| Recorded detail | Ability to visualize small structures | ||||
| Contrast | Difference in density between any two areas on a radiograph | ||||
| Density | Degree of film blackening | ||||
| kVp | Primary controlling factor of radiographic contrast. | ||||
| kVp Formula: | cm (x) 2 + 40 = kVp | ||||
| What 3 factors control quality of radiographs? | mA, kVp and exposure time | ||||
| Reduce exposure for these conditions | Old age, Pneumothorax, Emphysema, Emaciation, Atrophy | ||||
| Increase exposure for these conditions | Pneumonia, Enlarged heart, Edema, Pleural effusion | ||||
| Source to Image Receptor Distance | Distance from anode inside x-ray tube to the image receptor. | ||||
| SID affects: | Magnification of body part, recorded detail, patient dose | ||||
| What are the 4 factors of radiographic quality? | Contrast, Density, Detail and Distortion | ||||
| The quantity of x-rays is dependent upon what? | mAs | ||||
| What unit is used to measure the quantity of radiation received by rad workers? | Rem | ||||
| How are milliamperage and time related to each other when used to maintain density? | Inversely proportional | ||||
| Which one of these factors (kVp, mAs) control radiographic DENSITY? | mAs | ||||
| Which one of these factors control radiographic CONTRAST? | kVp | ||||
| What does the rad and gray have in common? | They both measure absorbed dose. | ||||
| What does the Sievert and the Rem have in common? | They both measure the dose equivalent (occupational exposure) | ||||
| What is the kVp for a part that measures 8cm thick? | 56 kVp (8cm x 2 + 40) |
Embed Code: If you would like this activity on your web page,
copy the script below and paste it into your web page.
show me how
Created by:
rad1958tech
on 2007-07-15