After some decades of experience with modern digital x-ray equipment and as a result of improvements in dosimetry estimates of the efficacy of shielding with modern equipment and techniques, professional and scientific societies are

modifying shielding practices in diagnostic radiology to discourage the use of patient gonadal shielding and fetal shielding

According to the American College of Radiology (ACR), abdominal radiologic examinations that have been requested after full consideration of the clinical status of a patient, including the possibility of pregnancy, need

not be postponed or selectively scheduled.

Which of the following procedures results in the lowest radiation effective dose to the patient?

Dual energy X-ray absorptiometry

In the event that a pregnant patient is inadvertently irradiated

the radiation safety officer or the medical physicist should perform the calculations necessary to determine fetal dose.

Essentially all diagnostic medical procedures result in fetal exposures ______________, so that _______________________.

of less than 0.01 Gy; the risk of abnormality is very small

Reducing the field size to the anatomic features of interest not only reduces patient exposure but also

increases completed image quality by decreasing scatter

Because multiple bony areas span the entire body, the radiation dose absorbed by the organ called bone marrow

cannot be measured by a direct method; it can only be estimated.

When a properly calibrated automatic exposure control (AEC) is not employed to obtain a uniform selection of technical x-ray exposure factors, well-managed imaging departments?

make use of standardized technique charts

Which of the following must always be the first step in protection of the reproductive organs?

Adequate and precise collimation of the radiographic beam to include only the anatomy of interest

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RAD 201 EXAM 4

Question	Answer
After some decades of experience with modern digital x-ray equipment and as a result of improvements in dosimetry estimates of the efficacy of shielding with modern equipment and techniques, professional and scientific societies are	modifying shielding practices in diagnostic radiology to discourage the use of patient gonadal shielding and fetal shielding
According to the American College of Radiology (ACR), abdominal radiologic examinations that have been requested after full consideration of the clinical status of a patient, including the possibility of pregnancy, need	not be postponed or selectively scheduled.
During a radiographic examination, which of the following combinations of technical exposure factors reduce patient radiation dose?	higher kVp, lower mAs
Studies of groups such as the atomic bomb survivors of Hiroshima have shown that damage to the newborn is unlikely for doses below	0.2 Gy
________________________ are the sensing devices most often used to measure skin dose directly.	thermoluminescent dosimeters
Which of the following procedures results in the lowest radiation effective dose to the patient?	Dual energy X-ray absorptiometry
In the event that a pregnant patient is inadvertently irradiated	the radiation safety officer or the medical physicist should perform the calculations necessary to determine fetal dose.
Which of the following is frequently a problem in diagnostic pediatric radiography?	patient motion
Essentially all diagnostic medical procedures result in fetal exposures ______________, so that _______________________.	of less than 0.01 Gy; the risk of abnormality is very small
Reducing the field size to the anatomic features of interest not only reduces patient exposure but also	increases completed image quality by decreasing scatter
According to the U.S. Public Health Service, the genetically significant dose (GSD) for the population of the United States is approximately	0.20 msv
Because multiple bony areas span the entire body, the radiation dose absorbed by the organ called bone marrow	cannot be measured by a direct method; it can only be estimated.
A blotchy radiographic image that results when an insufficient quantity of x-ray photons reaches the image receptor is called	quantum noise or mottle
When a properly calibrated automatic exposure control (AEC) is not employed to obtain a uniform selection of technical x-ray exposure factors, well-managed imaging departments?	make use of standardized technique charts
Which of the following must always be the first step in protection of the reproductive organs?	Adequate and precise collimation of the radiographic beam to include only the anatomy of interest

Created by: rbats

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