TEST BANK
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Patient Care in Radiography 9th Edition Ehrlich Test Bank Page 1 of 93
Chapter 01: Introduction to Radiography Ehrlich: Patient Care in Radiography
MULTIPLE CHOICE 1. X-rays were discovered in 1895 by: a. Coolidge. b. Crookes. c. Roentgen. d. Edison. ANS: C
REF: p. 2
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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
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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 le ns. NbyURtheSI d. They cannot be detected huN m anTsensesO . ANS: C
REF: pp. 7-8
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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
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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
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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.
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d. radiation field. ANS: C
REF: p. 8
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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
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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
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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
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10. The container for the va cuu mNoUf R t hSe I x-N raG yT tuB b. e iC sO mM ade of: a. glass. b. aluminum. c. tungsten. d. carbon. ANS: A
REF: p. 5
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11. X-rays are a type of: a. electricity. b. microwave. c. kinetic energy. d. electromagnetic energy. ANS: D
REF: p. 6
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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
Patient Care in Radiography 9th Edition Ehrlich Test Bank Page 3 of 93
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
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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
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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
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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
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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
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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
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19. The anode or positive end of the x-ray tube is the end that contains the:
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a. b. c. d.
target. filament. focusing cup. space charge.
ANS: A
REF: p. 6
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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
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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
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Chapter 02: Image Quality Factors Ehrlich: Patient Care in Radiography: With an Introduction to Medical Imaging
MULTIPLE CHOICE 1. An x-ray exposure is made using the following factors: 200 mA, 0.04 seconds, 80 kVp, and
48 inches SID. In this case, which represents the value of the mAs? a. 0.08 b. 0.8 c. 8 d. 16,000 ANS: C
REF: p. 22
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2. An increase in OID will result in:
1. increased magnification. 2. decreased image detail. 3. increased image detail. a. 1 only b. 2 only c. 1 and 2 d. 1 and 3 ANS: C
REF: p. 30
OBJ: 6
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3. The primary purpose of intensiU fyinSg scNr e eT ns is to: a. protect the film from light and damage during radiography. b. improve the definition on the radiograph. c. reduce the quantity of radiation required to produce a satisfactory image. d. reduce the possibility of artifacts on the film. ANS: C
REF: p. 25
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4. In order to increase the penetration of the x-ray beam, which of the following factors should
be increased? a. Kilovoltage b. Milliamperage c. mAs d. Exposure time ANS: A
REF: p. 28
OBJ: 4
5. In order to increase optical density of a film/screen image, which of the following factors
should be increased? a. Kilovoltage b. SID c. mAs d. OID ANS: C
REF: p. 27
OBJ: 3
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6. Magnification is affected by: a. OID only. b. SID only. c. both OID and SID. d. neither OID nor SID. ANS: C
REF: p. 29
OBJ: 4 | 6 | 7
7. An image receptor that contains a photostimulable plate that is converted to an image by
processing with a laser is part of a system called: a. digital radiography (DR). b. computed radiography (CR). c. a film/screen system. d. digital fluoroscopy. ANS: B
REF: p. 26
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8. Radiation exposure is directly proportional to: a. OID. b. kVp. c. mAs. d. SID. ANS: C
REF: p. 22
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9. An image that is black in the darkest areas and white in the lightest areas is said to have: a. high contrast. b. sharp detail. c. low contrast. d. poor detail. ANS: A
REF: p. 31
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10. To decrease the contrast on a radiographic image, you should: a. increase the kVp. b. decrease the kVp. c. increase the exposure time. d. decrease the mAs. ANS: A
REF: p. 28
OBJ: 4
11. An increase in kVp affects the x-ray beam by causing it to: a. have greater intensity. b. be more homogeneous. c. cover a larger area. d. contain more long wavelengths. ANS: A
REF: p. 23
OBJ: 4
12. Image detail is affected by: a. mAs and kVp b. kVp and SID
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