RADIOGRAPHY 8th EDITION BY SHERER LATEST ALL
COMPLETE CHAPTERS 1-16 QUESTIONS AND VERIFIED
ANSWERS | ALREADY GRADED A+
The use of radiation in the healing arts did not begin until the discovery of x-rays in
what year? - ANSWER: 1895
What is defined as the effective measures employed by radiation workers to
safeguard patients, personnel, and general public from unnecessary exposure to
ionizing radiation? - ANSWER: Radiation protection
The need for safeguarding against significant and continuing radiation exposure is
based on evidence of harmful _______________. - ANSWER: Biologic effects
What is the degree to which the diagnostic study accurately reveals the presence or
absence of disease in the patient? - ANSWER: Diagnostic efficacy
The philosophy of as low as reasonably achievable (ALARA) should be what part of
every health care facility's personnel radiation control program? - ANSWER: Main
What are the three basic principles of radiation protection? - ANSWER: Time,
distance and shielding
Who is responsible for providing the necessary resources and appropriate
environment in which to execute an ALARA program? - ANSWER: Employer
In a hospital setting who is expressly charged by the administration to be directly
responsible for the ALARA program? - ANSWER: Radiation Safety Officer
Radiation refers to ______________energy that passes from one location to another
and can have many manifestations. - ANSWER: kinetic
The amount of energy transferred to electrons by ionizing radiation is the basic
concept for radiation dose. - ANSWER: True
What form of radiation includes alpha and beta particles? - ANSWER: Particulate
radiation
Equivalent dose is a radiation __________ used for radiation protection purposes
when a person receives exposure from various types of ionizing radiation. - ANSWER:
Quantity
, What is a classic example of organic damage that results from non-negligible
exposure to ionizing radiation? - ANSWER: Changes in blood count
Radon is the __________decay product of radium and is produced as radium decays
in the soil. - ANSWER: First
According to the Environmental Protection Agency radon is the second leading cause
of what type of cancer in the United States? - ANSWER: Lung
What was the average dose received by the population living within a 50-mile radius
of the Three Mile Island plant? - ANSWER: 0.08 mSv
What was the amount of radiation released at Chernobyl when compared to the
radioactivity of Hiroshima and Nagasaki combined? - ANSWER: 30-40 times
A diagnostic x-ray beam is produced when a stream of high-speed __________
bombard a positively charged target. - ANSWER: Electrons
What is the most common method to eliminate the effects of indirectly transmitted
x-ray photons? - ANSWER: Air gap technique & Radiographic grids
What are the two important types of interactions between x-ray radiation and
matter important in diagnostic radiology? - ANSWER: Compton scattering,
photoelectric absorption
Photoelectric absorption is an interaction between an x-ray photon and an inner-
shell electron. - ANSWER: True
Characteristic x-rays are also known as: - ANSWER: Fluorescent radiation
What is the effective atomic number of bone? - ANSWER: 13.8
If two structures have the same density and atomic number, but one is twice as thick
as the other, the thicker one will absorb how many more photons? - ANSWER: 2
Times
Contrast media is used to visualize similar structures or tissues because it consists of
solutions containing elements having what difference compared to the surrounding
soft tissue? - ANSWER: Higher atomic number
In the Compton process which name does not refer to the freed electron? -
ANSWER: Kinetic electron
In November 1895 William Roentgen took the world's first x-ray of his wife's
____________. - ANSWER: Hand