Ch. 11 Diagnostic Imaging Key Terms Review

What does the acronym ALARA stand for?

• As Low As Reasonably Achievable

• As Low As Radiographically Acceptable

• As Low As Radiation Allowable

• As Low As Radiographic Achievement

What term is used to describe tissue that transmits all the sound through to deeper tissues?

• Anechoic

• Hyperechoic

• Isoechoic

• Hypoechoic

What is the function of an Annular Array in radiography?

• Arranges the crystals in concentric rings

• Produces electrons in the x-ray tube

• Restricts the x-ray beam to reduce scatter

• Measures the distance from the target of the x-ray tube to the radiographic film

What is the role of the anode in the x-ray tube?

• Produces x-rays when hit with electrons from the cathode

• Restricts the x-ray beam to reduce scatter

• Blurs the white grid lines on the radiograph

• Measures the distance from the target of the x-ray tube to the radiographic film

What is the Bisecting Angle Technique used for in radiography?

• To place the film as close to the intended tooth as possible

• To restrict the x-ray beam to reduce scatter

• To produce a continual stream of images

• To enhance the distance when the sound beam traverses a cystic structure

What is the purpose of a Bucky in radiography?

• Blurs the white grid lines on the radiograph

• Produces electrons in the x-ray tube

• Restricts the x-ray beam to reduce scatter

• Measures the distance from the target of the x-ray tube to the radiographic film

What is the function of a collimator in an x-ray machine?

• To restrict the x-ray beam to reduce scatter

• To produce electrons in the x-ray tube

• To blur the white grid lines on the radiograph

• To measure the distance from the target of the x-ray tube to the radiographic film

What does the term "contrast" refer to in radiography?

• Differences in radiographic density between adjacent areas on a radiographic image

• The distance measured from the target of the x-ray tube to the radiographic film

• The film's inherent ability to produce shades of gray

• The lead strips placed at progressively increasing angles to match the divergence of the x-ray beam

What is the primary use of Direct Exposure Film in radiography?

• To image the extremities or rostral mandible or maxilla

• To restrict the x-ray beam to reduce scatter

• To produce electrons in the x-ray tube

• To blur the white grid lines on the radiograph

What does the term "echoic" mean in radiography?

• The most of the sound is reflected back to the transducer

• The film's inherent ability to produce shades of gray

• The distance measured from the target of the x-ray tube to the radiographic film

• The lead strips placed at progressively increasing angles to match the divergence of the x-ray beam