PMU - Year 1 Physics - Part 4(A)

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Protons and neutrons in a nucleus are termed:

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Linear attenuation coefficient of photoelectric absorption (photoelectric effect interaction probability) τ is:

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Linear attenuation coefficient of photoelectric absorption τ depends strongly (approximately to the 4-th power) on:

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Linear attenuation coefficient for Compton effect (Compton scattering interaction probability) δ is proportional to:

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Linear attenuation coefficient for Compton effect is proportional to:

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Linear attenuation coefficient for pair production (electron-positron production probability) X is proportional to:

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Predominant mode of interaction between conventional diagnostic x-ray and biological tissues (Figure 11. not included) is:

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Interaction of photonic ionizing radiation with matter will

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What type of interaction between diagnostic x-rays and matter is improbable:

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Consider attenuation of photon beam in water/soft tissue (figure 11. not included). Which statement is true:

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Roentgen Rays are:

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Roentgen rays are:

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X-rays have

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The wavelength of the roentgen radiation is within the range of:

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X-rays have:

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Characteristic x-ray radiation:

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Continuous x-ray energy spectrum:

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Intensity ψ of radiation in x-ray tube is proportional to:

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Intensity ψ of roentgen radiation (x-ray tube) is proportional to:

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Intensity ψ of roentgen radiation (x-ray tube) if proportional to:

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Minimum wavelength λmin (maximum energy) of x-ray tube radiation depends on:

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Filters in x-ray apparatus modify:

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Intensity ψ of the Roentgen rays is proportional to:

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Hardness of x-ray radiation (harder/softer) is changed by:

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The relationship between HVL (Half Value Layer) and linear attenuation coefficient µ is

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Water is said to be soft tissue equivalent with respect to x-ray attenuation. This is because water and soft tissue have approximately the same properties. Which properties are NOT the same? (there are more than one correct answers)

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The purpose of the introduction of contrast substances in the roentgen diagnostics is to:

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Contrast substances in diagnostics radiology will:

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Which of the listed chemical elements provides maximum contrast in diagnostic radiology:

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Roentgen osteo-densitometry (measurement of bone density) is based on which of the following phenomena:

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Hounsfield Unit (CT number) for bones is equal to:

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Hounsfield unit (CT number) for air is equal to:

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Hounsfield unit (CT number) for water is equal to:

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Hounsfield unit (CT number) is defined as:

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Predominant x-ray interaction mode in CT scanning is:

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CT diagnostic imaging is based on the phenomenon of:

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What is the meaning of "computed" in name of CT (computed tomography)?

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Computed tomography uses higher anode voltage compared to conventional roentgenography because

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CT exposes pateints to higher radiation doses compared to conventional roentgenography (x-ray imaging) because:

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Radionuclides used in "in vivo" radionuclide diagnostics are:

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What type of radioactivity is related to SPECT radionuclide diagnostics:

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Alpha-rays are a beam of:

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Radiopharmaceuticals are:

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The following quantity participates in the law of radioactive decay:

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Half-life T1/2 is defined as:

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Isomeric transition is a type of decay that changes:

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Radionuclides produced in generators have:

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Radionuclide generators contain:

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Radionuclides are:

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How does activity of a radio-pharmaceutical change after sterilization for intravenous application (sterilization time ignored):

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Radio-pharmaceuticals used in nuclear medicine include:

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Radio-pharmaceuticals used for "in vivo" diagnostics contain radionuclides with the following mode of radioactivity:

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Time required for intial activity A0 for a radioactive source to decay to 10% is between:

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The decay constant for 182TA is 0.006 day-1. Which is its half life:

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The phenomenon of radioactivity is associated with:

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Electron capture involves:

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In alpha decay:

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Isomeric transition involves:

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An alpha-particle consists of:

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For pair production interactions it is true that:

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99Tc-m has a half-life t1/2 = 6h. What is the approximate value of 99tc-m decay constant:

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After 40 half-lives have elapsed, the activity A of radionuclide is equal to:

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Polonium-210 has a half-life of 4.5 months, and decays into the stable daughter isotope of lead-206. By measuring the proportion of polonium to lead in a sample, one can establiosh the production date of polonium. If the proportion is 1:15 (Po:Pb), how many months have elapsed since production date?

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What type of radiation can NOT be detected with scintillation detector?

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Ionizing radiation used for "In vivo" radionuclide diagnostics:

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Which quantity is NOT a parameter of radionuclides:

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Activity A is a parameter of:

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Why is technetium-99m (99mTC) preferred over iodine-131 (131-I) for thyroid gland diagnostics?

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1987 an old radiotherapy source of cesium-137 (T1/2 = 30 years) was stolen from an abandoned hospital in the brazilian city of goiania. It was subsequently handled by many people, resulting in four deaths and 249 cases of high radiation exposure. If the activity of the source was 74TBq (Terebecquerels) in 1971, what was the activity in the time of the accident?

All Questions uploaded word for word from MCQ book. All Credit to Authors. Mistakes due in process may have been made, use and check your work at your own discretion. Only simple writing allowed, i.e Superscript and Subscript absent. Questions missed due to Figure/Diagrams/Text: 11.44.46.57

PMU - Year 1 Physics - Part 4(A)

Protons and neutrons in a nucleus are termed:

Linear attenuation coefficient of photoelectric absorption (photoelectric effect interaction probability) τ is:

Linear attenuation coefficient of photoelectric absorption τ depends strongly (approximately to the 4-th power) on:

Linear attenuation coefficient for Compton effect (Compton scattering interaction probability) δ is proportional to:

Linear attenuation coefficient for Compton effect is proportional to:

Linear attenuation coefficient for pair production (electron-positron production probability) X is proportional to:

Predominant mode of interaction between conventional diagnostic x-ray and biological tissues (Figure 11. not included) is:

Interaction of photonic ionizing radiation with matter will

What type of interaction between diagnostic x-rays and matter is improbable:

Consider attenuation of photon beam in water/soft tissue (figure 11. not included). Which statement is true:

Roentgen Rays are:

Roentgen rays are:

X-rays have

The wavelength of the roentgen radiation is within the range of:

X-rays have:

Characteristic x-ray radiation:

Continuous x-ray energy spectrum:

Intensity ψ of radiation in x-ray tube is proportional to:

Intensity ψ of roentgen radiation (x-ray tube) is proportional to:

Intensity ψ of roentgen radiation (x-ray tube) if proportional to: