Patient Care in Radiography 9th Edition Ehrlich Test Bank Chapter 1 – 22 Updated Guide 2022

Patient Care in Radiography 9th Edition Ehrlich
Test Bank
Chapter 01: Introduction to Radiography
Ehrlich: Patient Care in Radiography: With an Introduction to Medical Imaging, 9th
Edition
MULTIPLE CHOICE

1. X-rays were discovered in 1895 by:
   a. Coolidge.
   b. Crookes.
   c. Roentgen.
   d. Edison.
   ANS: C REF: p. 2 OBJ: 1
2. Of the following types of electromagnetic energy, which has the shortest wavelength?
   a. Radio waves
   b. X-rays
   c. Visible light
   d. Ultraviolet light
   ANS: B REF: p. 7 OBJ: 7
3. Which of the following is NOT an accurate statement regarding the characteristics of x-rays?
   a. They can penetrate matter that is impenetrable to light.
   b. They cause certain crystals to fluoresce.
   c. They can be refracted by a lens.
   d. They cannot be detecteTdEbSyTthBeAhuNmKaSnEsLenLseEsR.
   ANS: C REF: pp. 7-8 OBJ: 8
4. An electron cloud surrounding a hot cathode is referred to as a(n):
   a. focusing cup.
   b. ampere.
   c. space charge.
   d. filament.
   ANS: C REF: p. 6 OBJ: 6
5. The purpose of rotating the x-ray tube target is to:
   a. create a space charge.
   b. remove long-wavelength photons from the x-ray beam.
   c. focus the electron stream on a small target area.
   d. increase the heat capacity of the anode.
   ANS: D REF: p. 9 OBJ: 6
6. An imaginary photon that is emitted from the center of the focal spot, perpendicular to the
   long axis of the x-ray tube, is called the:
   a. electron stream.
   b. x-ray beam.
   c. central ray.

d. radiation field.
ANS: C REF: p. 8 OBJ: 10

7. A device used to control the size of the radiation field is a:
   a. collimator.
   b. detent.
   c. tube housing.
   d. filter.
   ANS: A REF: p. 8 OBJ: 11
8. The function of an x-ray grid is to:
   a. decrease patient radiation dose.
   b. increase radiographic resolution.
   c. increase radiographic contrast by reducing scatter radiation fog.
   d. increase radiographic density.
   ANS: C REF: p. 14 OBJ: 11
9. The majority of radiography education programs today are based in:
   a. proprietary schools.
   b. hospitals.
   c. clinics.
   d. colleges.
   ANS: D REF: p. 4 OBJ: 3
10. The container for the vacuTumESofTtBheAxN-KraSyEtuLbLe EisRm.aCdeOoMf:
    a. glass.
    b. aluminum.
    c. tungsten.
    d. carbon.
    ANS: A REF: p. 5 OBJ: 4
11. X-rays are a type of:
    a. electricity.
    b. microwave.
    c. kinetic energy.
    d. electromagnetic energy.
    ANS: D REF: p. 6 OBJ: 7
12. The frequency of an electromagnetic sine wave is defined as:
    a. the distance from trough to crest.
    b. the distance from one crest to the next.
    c. the number of times per second that a crest passes a given point.
    d. the velocity at which the wave travels through space.
    ANS: C REF: p. 6 OBJ: 9
13. Which of the following formulas represents the relationship between the wavelength,
    frequency, and velocity of an electromagnetic wave?
    a. f = λ  v
    b. V = λ  f
    c. Λ = f ÷ v
    d. f = λ ÷ v
    ANS: B REF: p. 6 OBJ: 9
14. Which of the following substances is most readily penetrated by x-rays?
    a. Water
    b. Air
    c. Bone
    d. Fat
    ANS: B REF: p. 7 OBJ: 8
15. Grids or buckys are generally used for body parts that measure greater than:
    a. 2 to 4 cm.
    b. 10 to 12 cm.
    c. 18 to 20 cm.
    d. 30 cm.
    ANS: B REF: p. 15 OBJ: 11
16. The access point for the radiographer to determine the exposure factors and to initiate the
    exposure is called the:
    a. transformer.
    b. image receptor unit.
    c. control console.
    d. stationary grid.
    ANS: C REF: p. 16 OBJ: 11
17. An x-ray machine designed for direct viewing of the x-ray image is called a(n):
    a. image receptor.
    b. transformer.
    c. control console.
    d. fluoroscope.
    ANS: D REF: p. 17 OBJ: 11
18. A device located between the x-ray tube and the control panel that increases the voltage
    delivered from the power company is called a:
    a. collimator.
    b. transformer.
    c. control console.
    d. fluoroscope.
    ANS: B REF: p. 16 OBJ: 11
19. The anode or positive end of the x-ray tube is the end that contains the:

a. target.
b. filament.
c. focusing cup.
d. space charge.
ANS: A REF: p. 6 OBJ: 5

20. The inventor of the fluoroscope, who also investigated hundreds of fluorescent materials, was:
    a. Coolidge.
    b. Pupin.
    c. Roentgen.
    d. Edison.
    ANS: D REF: p. 3 OBJ: 2
21. The inventor of the hot cathode x-ray tube, the prototype of the x-ray tubes of today, was:
    a. Coolidge.
    b. Pupin.
    c. Roentgen.
    d. Edison.
    ANS: A REF: p. 3 OBJ: 2