| A | B |
|---|
| Where do x-rays exit the tube? | Through the tube port |
| An imaginary line in the center of the x-ray beam perpendicular to the long axis of the x-ray tube. | Central ray |
| What is the tube housing lined with? | Lead |
| The unseen image contained in the IR before processing. | Latent image |
| Absorption of the x-ray beam within matter. | Attenuation |
| Unwanted image exposure caused by scatter radiation | Scatter radiation fog |
| The part of the x-ray beam that leaves the tube and is unattenuated, except by air. | Primary radiation |
| What remains of the primary beam after it has been attenuated by the patient. | Remnant radiation |
| Radiation from the primary beam that is randomly scattered within or outside of the body. | Scatter radiation |
| Generally, scatter radiation has _____ energy than the primary beam. | Less |
| What is the most common image receptor system used by limited operators? | Computed radiography (CR) |
| What type of plate does a CR image receptor system have? | A phosphor imaging plate |
| After a CR plate is exposed, the CR cassette must be inserted into a ___________. | CR reader |
| Where is the control console located? | In the control booth |
| What are 2 types of tube supports? | Ceiling mount and tube stand |
| Movement along the long axis of the x-ray table | Longitudinal |
| Movement across the x-ray table, at right angles to longitudinal | Transverse |
| Movement up and down, increasing or decreasing the distance between the tube and the table | Vertical |
| Movement that allows the entire tube stand to turn on its axis, changing the angle at which the tube arm is extended. | Rotational |
| What holds the tube in position? | A system of electric and/or mechanical locks. |
| What is the name of the mechanism that tends to stop a moving part in a specific location? | Detent |
| What device allows the limited operator to vary the size of the radiation field? | Collimator |
| Name three types of motion a radiographic table may be capable of. | Vertical, tilt and floating tabletop |
| What is the Trendelenberg position? | When the head end of the table is lowered at least 15 degrees. |
| What is the device that absorbs most of the scatter radiation from the patient and prevents it from reaching the IR? | Grid |
| What is the most frequent adverse incident in the radiology department? | A patient falling |
| True or false. Standard distances from the x-ray tube to the IR must be used. | True |
| What is the function of a transformer? | To produce the high voltage required for x-ray production as well as the low mA needed in the x-ray tube. |
| If a patient is x-rayed standing or sitting, what device is used? | The upright cassette holder. |
| What is the name of a device that contains a moving grid? | Bucky |
| The principle source of scatter radiation (and thus a radiation hazard) to the limited operator is _______. | The patient |
| True or false? X-rays can turn corners. | False |
| Where should the limited operator be during x-ray exposures. | Behind the lead barrier of the control booth. |
| True or false? It is acceptable for limited operators to hold uncooperative patients for exposures. | False |
| What is the purpose of a safety check done prior to making the exposure? | To ensure that only the required persons are in the x-ray room (usually just the patient). |
