DETAILED ANSWERS/NEWEST UPDATE!!!
The rationale behind the development of automatic exposure control (AEC) is to:
reduce repeats and improve image quality.
Which of the following structures is located in the mediastinum?
trachea and thymus
When evaluating an AP projection (open-mouth) radiograph of C1-C2, the occlusal surface
of the ________ should be superimposed with the ______
top incisors; base of the skull
The ________ sphincter prevents reflux of stomach contents into the esophagus.
cardiac
Combining 2 hydroxyl radicals (OH*) will form:
H2O2.
Children have epiphyseal plates made of ________ that can be evaluated as part of normal
chronologic age for bone age analysis.
hyaline cartilage
The International Commission on Radiological Protection (ICRP) dose equivalent limit for
the hands is_______ mSv.
500
When acquiring a lateral projection of the finger, it is important to keep the finger parallel
to the image receptor because in this position:
the joint spaces are perpendicular to the image receptor and open on the resulting image.
Which are the appropriate methods to ensure the correct drug is administered to the
patient? 1. Confirm the correct medication. 2. Record the time and date of administration.
3. Check the label at least 3 times.
1 and 3
A backup timer for the automatic exposure control (AEC) serves to:
terminate the exposure in the event of equipment or operator error.
Genetic defects and cancer are examples of ________ effects.
stochastic
, 2
Which of the following is a guideline used to reduce personnel and patient dose during
fixed fluoroscopy?
15-inch minimum SSD
Selecting exposure factors of ________ milliampere-seconds (mAs) and _______peak
kilovoltage (kVp) delivers the LEAST amount of radiation to the patient.
100;100
According to NCRP Report No. 116, annual occupational exposure to the lens of the eye
should not exceed:
150 mSv.
Leakage radiation in the radiography/fluoroscopy exposure room is emitted from the:
x-ray tube housing.
The ________ receives electrons immediately after they are read out from an imaging
detector.
analog-to-digital converter
Select the item below that is NOT required as part of a standardized technique chart.
object-to-image distance (OID)
A wedge filter is a type of ________ filter.
compensating
The BEST reason to use touch for emphasis when performing a radiologic examination is
to:
specify instructions or locations.
Radiation that exits the patient and is directed toward the receptor is referred to as
________ radiation.
remnant
Which type of communication includes eye contact, touch and tone of voice?
nonverbal
The ________ is an automatic exposure device that uses a gas-filled container.
ionization chamber