Radiation Protection in Medical Radiography - 9th Edition
A patient may choose to assume a relatively small statistical risk of exposure
to ionizing radiation for a physician to obtain essential diagnostic medical
information when:
1. Illness occurs
2. Injury occurs
3. A specific imaging procedure for health screening purposes is called for
Correct Answer - 1, 2, and 3
Effective measures employed by radiation workers to safeguard patients,
personnel, and the general public from unnecessary exposure to ionizing
radiation defines: Correct Answer - Radiation protection
Which of the following is a method that can be used to answer patients'
questions about the amount of radiation received from a radiographic
procedure? Correct Answer - BERT
The term optimization for radiation protection (ORP) is synonymous with
which of the following? Correct Answer - As low as reasonably achievable
(ALARA)
Monitoring and reporting of patient dose for CT and interventional
procedures can lead to: Correct Answer - A reduction in patient radiation
dose
The amount of ionization produced in the air when ionizing radiation is
present is known as: Correct Answer - Exposure
,The degree to which the diagnostic study accurately reveals the presence or
absence of disease in the patient while adhering to radiation safety guidelines
defines which of the following terms? Correct Answer - Diagnostic efficacy
The millisievert (mSv) is equal to: Correct Answer - 1⁄1000 of a sievert
An effective radiation safety program requires a firm commitment to radiation
safety by:
1. Facilities providing imaging services
2. Radiation workers
3. Patients Correct Answer - 1 and 2 only
If a child receives a dose of radiation in a CT scan where adult protocols are
used, the child, because of being smaller in size, will receive a: Correct
Answer - Higher effective dose than would an adult, but the image produced
will appear to be of acceptable quality
The amount of radiation actually received by a patient from a diagnostic x-ray
procedure may be indicated in terms such as:
1. Entrance skin exposure (ESE), which includes skin and glandular dose
2. Bone marrow dose
3. Gonadal dose Correct Answer - 1, 2, and 3
Which of the following processes is the foundation for imaging of the
interaction of x-rays with human tissue? Correct Answer - Ionization
, Why are the long-term effects, such as an increased incidence of cancer in the
exposed population living near Japan's Fukushima Daiichi Nuclear Plant,
unable to be accurately determined? Correct Answer - It was extremely
difficult to measure the amounts of radiation people received.
According to the most recent available data from 2016, what is the radiation
dose from natural background radiation attributed to exposure from radon
and thoron? Correct Answer - 2.3 mSv
Which of the following are natural sources of ionizing radiation?
A. Medical x-radiation and cosmic radiation
B. Radioactive elements in the crust of the Earth and in the human body
C. Radioactive elements in the human body and a diagnostic x-ray machine
D. Radioactive fallout and environs of atomic energy plants Correct Answer
- B. Radioactive elements in the crust of the Earth and in the human body
An equivalent dose as low as 250 mSv delivered to the whole body may cause
which of the following within a few days?
A. An increase in the number of lymphocytes in the circulating blood.
B. A substantial decrease within a few days in the number of lymphocytes or
white blood cells that are the body's primary defense against disease.
C. A drop immediately to zero in the lymphocyte count. D. A large increase in
the number of platelets. Correct Answer - B. A substantial decrease within
a few days in the number of lymphocytes or white blood cells that are the
body's primary defense against disease.
A patient may choose to assume a relatively small statistical risk of exposure
to ionizing radiation for a physician to obtain essential diagnostic medical
information when:
1. Illness occurs
2. Injury occurs
3. A specific imaging procedure for health screening purposes is called for
Correct Answer - 1, 2, and 3
Effective measures employed by radiation workers to safeguard patients,
personnel, and the general public from unnecessary exposure to ionizing
radiation defines: Correct Answer - Radiation protection
Which of the following is a method that can be used to answer patients'
questions about the amount of radiation received from a radiographic
procedure? Correct Answer - BERT
The term optimization for radiation protection (ORP) is synonymous with
which of the following? Correct Answer - As low as reasonably achievable
(ALARA)
Monitoring and reporting of patient dose for CT and interventional
procedures can lead to: Correct Answer - A reduction in patient radiation
dose
The amount of ionization produced in the air when ionizing radiation is
present is known as: Correct Answer - Exposure
,The degree to which the diagnostic study accurately reveals the presence or
absence of disease in the patient while adhering to radiation safety guidelines
defines which of the following terms? Correct Answer - Diagnostic efficacy
The millisievert (mSv) is equal to: Correct Answer - 1⁄1000 of a sievert
An effective radiation safety program requires a firm commitment to radiation
safety by:
1. Facilities providing imaging services
2. Radiation workers
3. Patients Correct Answer - 1 and 2 only
If a child receives a dose of radiation in a CT scan where adult protocols are
used, the child, because of being smaller in size, will receive a: Correct
Answer - Higher effective dose than would an adult, but the image produced
will appear to be of acceptable quality
The amount of radiation actually received by a patient from a diagnostic x-ray
procedure may be indicated in terms such as:
1. Entrance skin exposure (ESE), which includes skin and glandular dose
2. Bone marrow dose
3. Gonadal dose Correct Answer - 1, 2, and 3
Which of the following processes is the foundation for imaging of the
interaction of x-rays with human tissue? Correct Answer - Ionization
, Why are the long-term effects, such as an increased incidence of cancer in the
exposed population living near Japan's Fukushima Daiichi Nuclear Plant,
unable to be accurately determined? Correct Answer - It was extremely
difficult to measure the amounts of radiation people received.
According to the most recent available data from 2016, what is the radiation
dose from natural background radiation attributed to exposure from radon
and thoron? Correct Answer - 2.3 mSv
Which of the following are natural sources of ionizing radiation?
A. Medical x-radiation and cosmic radiation
B. Radioactive elements in the crust of the Earth and in the human body
C. Radioactive elements in the human body and a diagnostic x-ray machine
D. Radioactive fallout and environs of atomic energy plants Correct Answer
- B. Radioactive elements in the crust of the Earth and in the human body
An equivalent dose as low as 250 mSv delivered to the whole body may cause
which of the following within a few days?
A. An increase in the number of lymphocytes in the circulating blood.
B. A substantial decrease within a few days in the number of lymphocytes or
white blood cells that are the body's primary defense against disease.
C. A drop immediately to zero in the lymphocyte count. D. A large increase in
the number of platelets. Correct Answer - B. A substantial decrease within
a few days in the number of lymphocytes or white blood cells that are the
body's primary defense against disease.
