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48 Cards in this Set
- Front
- Back
Who discovered X-Rays? |
Wilhelm Conrad Roentgen |
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What year were X-Rays discovered? |
1895 |
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How did Wilhelm Conrad Roentgen discover X-Ray? |
While using the Crookes tube. |
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Why is it called an X-Ray? |
X is used for the unknown in math. |
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What is the name of the doctor that took dental xrays in 1895? |
Otto walkoff |
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What are the characteristics of an X-Ray? |
a. Travelling in a straight line at the speed of light. b. causes certain substances to glow c. Irritates living tissue (may cause necrosis) d. They affect photographic film by producing a hidden image made visible by processing. |
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What is the most common type of Xray? |
Chest radiograph |
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General diagnostic radiographers uses what to produce black and white images of anatomy? |
Radiation (xray) |
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Computed tomography uses what kind of Xray unit to obtain slices of smarmy at different levels within the body? |
Rotating Xray unit |
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What controls the exposure time to the patient? |
MAS (millampere per second) |
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What does ALARA mean? |
As low as reasonably achievable. |
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What does MRI stand for? |
Magnetic Resonance Imaging. |
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When taking Xrays always drape the pt in ___ apron and collar to protect_____ system and ____ gland. |
Lead; reproductive; thyroid. |
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Cardiovascular a interventional technologist used sophisticated imaging technologies such as _____ to help guide ___, ____,____ or other tools through the body. |
Biplane fluoroscopy; catheters, vena cava filters, stents |
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Where are badges placed? |
In the xray room behind the techs protective lead-lined barrier or at least 6 inches from the tube head. |
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The surfaces of the dark room are disinfected____. |
Daily |
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What federal law indicates that mammographers must meet stringent educational and experience criteria in order to perform mammographic procedures? |
Mammography Quality Standards Act |
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Prolonged exposure to radiation may result in: |
Hair loss, redness and inflammation of the skin, blood count changes, cell atrophy ( wasting away), ulcerations, sterility, genetic damage, cancer, leukemia and death. |
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How are Xrays produced? |
They are produced in the Xray tube head when metal (tungsten) target is bombarded be a stream of electrons. |
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What are the 4 factors that control the density of an Xray? |
*kilo-voltage (kVp) *exposure time *milli-amperage (mA) *target-film distance (TFD) |
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All workers should be issued what kind of badge? |
Environmental Dosimetry Radiation Film Badge. |
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How often should the Environmental Dosimetry Radiation Film Badge be collected? |
6-7 weeks |
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What factors affect the amount of exposure (dose) a pt receives from the source? |
Time, distance and shielding. |
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____is your friend. |
Lead |
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Should you ask a female pt is she is pregnant or could be pregnant? |
Yes always. |
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What are the 4 major ways to reduce radiation exposure to the pt and workers? |
Shielding, time, distance, and amount. |
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How far should a tech be from the source of an Xray? |
At least 6 feet |
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For personnel who work near a source of radiation there annual total dose limit is: |
5000 mRem (5 Rem) |
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Always stand behind the ________ window or wall for protection. |
Lead- lined |
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______ stand in the path of the xray. a. Always b. Never |
Never |
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____ hold the xray film in the patients mouth during a dental radiograph. a. Never b. Always |
Never |
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___ hold the tube head during exposure. a. Always b. Never |
Never |
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What is the Precious Metals Recovery Program instruction? |
Bumedinst 4010.3 |
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What are the 2 precious metals found in xray departments? |
Lead and silver |
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The precious metals recovery program is designated to save _____ money by recycling precious metals and using those funds to offset the cost of supplies for ___ activities. |
Department of defense. |
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Who is authorized to order dental xrays? |
Dental officer is the only one authorized. |
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What organization was created to monitor the use of ionizing radiation? |
Nuclear Regulatory Commission (NRC) |
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How often should the developer and fixer be changed? |
At a minimum of once every 3-4 weeks. |
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______ is the most commonly used method of processing medical and dental radiographs in the Navy. |
Automatic processing |
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How long should you wait between films before inserting another film into the automatic processor? |
15 seconds. |
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What is maximum radiation exposure for non-radiation workers per year? |
500 mRem |
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What are the two sources of illumination in a dark room? |
White light and safelight. |
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What is the distance of the safelight to the work surface so that the corpsman can open cassette and process film? |
No less than 4 feet. |
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What is the length of time unexposed film should be left outside of its protective covering under safelight conditions? |
No more than 2 minutes |
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What test is used to detect white light leakage in the dark room? |
Penny test |
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How long should penny be placed on film? |
15 minutes. |
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What are the 5 basic steps involved in processing Xray films? |
Developing, rinsing, fixing, washing and drying. |
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What Xray exam is indicated for pt that reports to medical with abnormal bowel movements and abdominal pain? |
AP projection KUB ( kidney, ureter and bladder) |