Test Bank for Patient Care in Radiography 10th Edition by Ehrlich

Test Bank for Patient Care in Radiography 10th Edition by Ehrlich

Chapter 01: Introduction to Radiography

Ehrlich: Patient Care in Radiography: With an Introduction to Medical Imaging, 10th 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 detected by the human senses.

               ANS: C                     REF: p. 7 | p. 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 vacuum of the x-ray tube is made of

a.        glass.

b.        aluminum.

c.        tungsten.

d.        carbon.