Which of the following statements is true?
1 centisievert = 100 rem
1 centisievert = 10 rem
1 centisievert = 1 rem
1 centisievert = 0.1 rem
1 centisievert = 1 rem
If a patient receiving x-ray therapy treatment receives a total dosage of 6000 rads, the dosage may be recorded as _____if the SI system is used.
12,000 Gy
6000 cGy
600 rads
60 R
6000 cGy
Who was the first American radiation worker to die from radiation-induced cancer in October 1904?
Thomas A. Edison
Wilhelm C. Roentgen
Clarence Madison Dally
Marie Curie
Clarence Madison Dally
Which of the following statements is correct?
1 C/kg of dry air = mc013-1.jpg
1 C/kg of dry air = mc013-2.jpg
2.58 ´ 10–4 C/kg of dry air = 10 sievert
2.58 ´ 10–4 C/kg of dry air = 50 roentgen
1 C/kg of dry air = mc013-2.jpg
Among physicians, cancer deaths attributed to x-ray exposure were reported as early as:
1910
1930
1937
1945
1910
The effective atomic number (Zeff) of soft tissue is:
15
13.8
7.4
5.9
7.4
Beta particles are actually:
gamma rays
high-speed electrons
protons
x-rays
high-speed electrons
For x-ray and gamma ray photons with energies up to 3 million electron volts (MeV), which of the following quantities may be defined as the measure of the total electrical charge of one sign, either all pluses or all minuses, per unit mass that these two kinds of radiation generate in air only?
Absorbed dose
Equivalent dose
Exposure
Collective effective dose
Exposure
Ten C/kg equals __________ roentgen.
2.58 ´ 10–4
25.8 ´ 10–4
3.9 ´ 104
39 ´ 104
3.9 ´ 104
Which of the following units is a unit of energy that may be defined as the work done or energy expended when a force of 1 newton (N) acts on an object along a distance of 1 meter (m)?
Coulomb per kilogram
erg
gray
joule
joule
Alpha particles have a radiation weighting factor (WR) that is numerically equal to:
1
5
10
20
20
One millirem equals ___________ rem.
1/10
1/100
1/1000
1/10,000
1/1000
Which of the following units are not SI units?
1. roentgen
2. Coulomb per kilogram, gray, sievert
3. rad and rem
1 only
2 only
3 only
1 and 3 only
1 and 3 only
As the intensity of x-ray exposure of the air volume increases, the number of electron-ion pairs produced:
also increases
decreases considerably
decreases slightly
remains the same
also increases
Which of the following effects must be measured to determine the total amount of radiation exposure in a specific volume of dry air under standard conditions of pressure and temperature (760 mm Hg or 1 atmosphere at sea level and 22o C)?
Biologic damage
Cellular activity
Energy absorption
Quantity of ionization
Quantity of ionization
Fifteen sievert equals __________ rem.
15
150
1500
15,000
1500
In the diagnostic radiology energy range (which includes mammography) from 23 to 150 kVp, which of the following tissues possesses the greatest ability to absorb radiant energy through the process of photoelectric absorption?
Air
Bone
Fat
Muscle
Bone
Which of the following is the SI unit of electrical current?
ampere
Coulomb per kilogram
erg
sievert
ampere
45 rem equals _________ mSv.
4.5
45
450
4500
450
Thirty-five mSv equals __________ rem.
0.35
3.5
35
350
3.5
Which of the following equals 400 rem?
4 mSv
40 mSv
400 mSv
4000 mSv
4000 mSv
Which of the following are types of ionizing radiation that produce virtually the same biologic effect for equal absorbed doses in body tissue?
X-rays, beta particles, and gamma rays
Alpha particles, beta particles, and gamma rays
X-rays, neutrons, and gamma rays
X-rays, alpha particles, and fast neutrons
X-rays, beta particles, and gamma rays
In the SI system, an energy absorption of 1 joule (J) per kilogram of matter in the irradiated object equals which of the following?
10 Sv
5 C/kg
1 rad
1 Gy
1 Gy
Who discovered x-rays on November 8, 1895?
Thomas A. Edison
Clarence Madison Dally
Louis Harold Gray
Wilhelm Conrad Roentgen
Wilhelm Conrad Roentgen
Of the following equivalents, which equals 1 rad?
1. 100 erg/g
2. 1/100 J/kg
3. 0.01 Gy
1 only
2 only
3 only
1, 2, and 3
1, 2, and 3