Final Exam
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| show | group that reviews regulations formulated by the International Commission on Radiological Protection (ICRP) and decides how to include them in U.S. radiation protection criteria.
🗑
|
||||
| show | method for assessing radiation exposure and associated risk of biologic damage to radiation workers and the general public; this method determines the various risks of cancer and genetic effects to tissue and organs exposed to radiation.
🗑
|
||||
| show | Radiation exposures occurring in the workplace and in the course of an individual's employment.
🗑
|
||||
| Effective dose equivalent (EDE) limits | show 🗑
|
||||
| EDE limits | show 🗑
|
||||
| EDE limits during pregnancy | show 🗑
|
||||
| primary radiation | show 🗑
|
||||
| show | The other two types of radiation, which also require protection, are leakage radiation from the x-ray tube housing and scatter radiation.
🗑
|
||||
| leakage radiation | show 🗑
|
||||
| scatter radiation | show 🗑
|
||||
| show | Any wall toward which the primary beam may be directed. It is designed to prevent primary radiation from reaching personnel or other people on the other side of the barrier.
🗑
|
||||
| show | Designed to protect areas from secondary radiation. Scatter and leakage radiation.
🗑
|
||||
| show | lead bonded to sheet rock or wood panelling
🗑
|
||||
| show | a sheet of lead 1/16 of an inch thick.
🗑
|
||||
| show | concrete, concrete block, or bricks.As a general rule, 4 inches of concrete is equal to 1/16 of an inch of lead sheeting.
🗑
|
||||
| What is the the minimum height of a primary barrier? | show 🗑
|
||||
| show | It is 0.1% of the intensity of the useful beam directed at the patient.
🗑
|
||||
| What is the leakage radiation limit 1 meter from the x-ray tube? | show 🗑
|
||||
| secondary protective barriers | show 🗑
|
||||
| What is the control booth window usually made of? | show 🗑
|
||||
| show | The control booth barrier should be positioned such that no one can enter the radiographic examination room without being seen by the radiographer.
🗑
|
||||
| Can the radiographer operate the control switch outside the control booth? | show 🗑
|
||||
| How is the thickness of protective barriers calculated? | show 🗑
|
||||
| show | The radiation-output weighted time when an x-ray generator is actually delivering radiation; specified either in units of mA seconds per week or mA minutes per week.
🗑
|
||||
| inverse square law | show 🗑
|
||||
| Where is the best placement of the x-ray machine? | show 🗑
|
||||
| show | A factor used to modify the shielding requirements for a particular barrier by accounting for the percentage of time that the space beyond the barrier is occupied.
🗑
|
||||
| uncontrolled areas | show 🗑
|
||||
| Controlled areas | show 🗑
|
||||
| What is the occupancy factor in controlled areas? | show 🗑
|
||||
| show | occupancy factor of 1/4
🗑
|
||||
| show | may be assigned a factor of 1/16.
🗑
|
||||
| show | less than the maximum annual effective dose equivalent to the occasional exposure of the general public. 20 microsieverts (100 mR) per week.
🗑
|
||||
| show | less than 1000 microsieverts per week.
🗑
|
||||
| show | is essentially the radiation output when the unit is actually delivering radiation. the average mAs of the x-ray generator and the number of x-ray examinations per week.
🗑
|
||||
| show | the fractional amount of time during which the x-ray beam is energized or directed toward a particular barrier. Also called the beam-direction factor.
🗑
|
||||
| show | Because floors are often exposed to primary beams during examinations on tables, they are always given a factor of 1. Doors, walls, and ceilings of radiation rooms exposed routinely to the primary beams are also given a use factor of 1.
🗑
|
||||
| What is the use factor of doors and walls not routinely exposed to the primary beam? | show 🗑
|
||||
| What is the use factor for ceilings of x-ray rooms not exposed routinely to the primary beam? | show 🗑
|
||||
| show | Secondary barriers, those at which the primary beam is not directed, are always given a use factor of 1. The reason for this is that scatter and leakage radiation are always present when the tube is energized.
🗑
|
||||
| lead apron | show 🗑
|
||||
| show | 0.5-mm thickness
🗑
|
||||
| What type of protective apparel should be used during mobile radiography or during fluoroscopic procedures? | show 🗑
|
||||
| What is the minimum thickness of gloves worn by the radiographer? | show 🗑
|
||||
| What type of shield should be used during fluoroscopy and other special radiographic procedures? | show 🗑
|
||||
| What is the lead equivalent of the neck and thyroid gland shielding? | show 🗑
|
||||
| show | optically clear lenses that contain lead with a 0.35- to 0.5-mm lead equivalent.
🗑
|
||||
| Who should immobilize the patient? | show 🗑
|
||||
| show | 0.5 millisieverts (0.05 rem) per month.
🗑
|
||||
| What is the equivalent dose limit for the embryo-fetus for the duration of pregnancy? | show 🗑
|
||||
| show | One monitor should be worn at collar level outside the protective apron. The second personnel monitoring device is worn at waist level under the protective apron.
🗑
|
||||
| show | Procedures used to estimate the amount of radiation received by individuals who work in a radiation environment.
🗑
|
||||
| show | monitor under the protective apron should show exposure values of less than 10% of those outside the apron.
🗑
|
||||
| show | only 30% of the skin dose.
🗑
|
||||
| show | Yes, they should handle only small quantities of radioactive material.
🗑
|
||||
| beam-limitation devices | show 🗑
|
||||
| additional protective measures found in fluoroscopy are....? | show 🗑
|
||||
| protective drape | show 🗑
|
||||
| show | The gap for the Bucky tray leaves an opening approximately 5 cm wide at the side of the table at about gonadal level. The Bucky slot cover, consisting of a 0.25-mm lead equivalent, automatically covers this opening.
🗑
|
||||
| cumulative timer | show 🗑
|
||||
| show | It must be long enough to allow the radiologic technologist to stand at least 6 feet away from the patient to minimize the risk of scatter radiation.
🗑
|
||||
| show | the best position for a radiographer to stand is at right angles to the x-ray beam and scattering-object line.
🗑
|
||||
| quality control (QC) | show 🗑
|
||||
| three steps of quality control | show 🗑
|
||||
| show | at least twice a year; all other evaluations are conducted at least annually
🗑
|
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:
elaughery
Popular Radiology sets