Radiation Measurement Devices 2

Question 1

Advantages: Tissue equivalent; reusable; high sensitivity
Disadvantages: Requires annealing; delayed readout; fading over time

Answer 1

TLDs

Question 2

Advantages: Small size; high sensitivity; real time dose measurements Disadvantages: Energy dependent; temperature sensitive; limited dose range

Answer 2

Diode

Question 3

Advantages: Absolute dosimeter; high accuracy Disadvantages: Complex; impractical for clinical use; sensitive to environmental conditions

Answer 3

Free Air Ion Chamber

Question 4

Advantages: Widely used in clinical dosimetry; stable and robust Disadvantages: Requires calibration; larger size can limit spatial resolution

Answer 4

Farmer Chamber

Question 5

Advantages: High spatial resolution; suitable for surface and shallow dose measurements Disadvantages: Limited to specific applications surface dose ; not useful for deep doses

Answer 5

Parallel Plate Ion Chamber

Question 6

Advantages: Small size; portable; commonly used Disadvantages: Perturbation effects; requires careful calibration

Answer 6

Thimble Chamber

Question 7

Advantages: High spatial resolution; low cost Disadvantages: Requires chemical processing; energy dependent; limited dynamic range

Answer 7

Radiographic Film

Question 8

Advantages: Self developing; high spatial resolution; no chemical processing required Disadvantages: Energy dependent; more expensive than radiographic film

Answer 8

Radiochromic Film

Question 9

Advantages: High precision; direct chemical reaction based measurement Disadvantages: Not reusable; requires careful chemical handling

Answer 9

Fricke Dosimeter

Question 10

Advantages: Real time readout; small size; no power supply needed Disadvantages: Limited lifetime; susceptible to radiation damage

Answer 10

MOSFET

Question 11

TLDs

Answer 11

Advantages: Tissue equivalent; reusable; high sensitivity
Disadvantages: Requires annealing; delayed readout; fading over time

Question 12

Diode

Answer 12

Advantages: Small size; high sensitivity; real time dose measurements Disadvantages: Energy dependent; temperature sensitive; limited dose range

Question 13

Free Air Ion Chamber

Answer 13

Advantages: Absolute dosimeter; high accuracy Disadvantages: Complex; impractical for clinical use; sensitive to environmental conditions

Question 14

Farmer Chamber

Answer 14

Advantages: Widely used in clinical dosimetry; stable and robust
Disadvantages: Requires calibration; larger size can limit spatial resolution

Question 15

Parallel Plate Ion Chamber

Answer 15

Advantages: High spatial resolution; suitable for surface and shallow dose measurements Disadvantages: Limited to specific applications surface dose ; not useful for deep doses

Question 16

Thimble Chamber

Answer 16

Advantages: Small size; portable; commonly used Disadvantages: Perturbation effects; requires careful calibration

Question 17

Radiographic Film

Answer 17

Advantages: High spatial resolution; low cost Disadvantages: Requires chemical processing; energy dependent; limited dynamic range

Question 18

Radiochromic Film

Answer 18

Advantages: Self developing; high spatial resolution; no chemical processing required Disadvantages: Energy dependent; more expensive than radiographic film

Question 19

Fricke Dosimeter

Answer 19

Advantages: High precision; direct chemical reaction based measurement Disadvantages: Not reusable; requires careful chemical handling

Question 20

MOSFET

Answer 20

Advantages: Real time readout; small size; no power supply needed Disadvantages: Limited lifetime; susceptible to radiation damage

Question 21

TLDs store energy in crystal lattice defects after radiation exposure, which is released as light when heated The light intensity is proportional to the absorbed dose

Answer 21

TLDs

Question 22

A diode generates an electric current when radiation creates electron hole pairs at a p-n junction. The current is proportional to the radiation dose

Answer 22

Diode

Question 23

Free air ion chambers measure the ionization produced by radiation in a defined volume of air. The charge collected is proportional to the exposure

Answer 23

Free Air Ion Chamber

Question 24

Farmer chambers are ionization chambers that collect charge produced by radiation in air, with the collected charge proportional to the absorbed dose in a medium e.g. water

Answer 24

Farmer Chamber

Question 25

Parallel plate ion chambers have electrodes arranged in parallel, which collect charge from ionized particles. They are ideal for measuring surface doses and shallow depths

Answer 25

Parallel Plate Ion Chamber

Question 26

Thimble chambers are small ion chambers used for radiation dosimetry, where a gas filled cavity collects charge from ionized particles, providing dose measurements

Answer 26

Thimble Chamber

Question 27

Radiographic film darkens when exposed to radiation due to the chemical reaction in the silver halide crystals. The darkness optical density is proportional to the dose

Answer 27

Radiographic Film

Question 28

Radiochromic film changes color upon exposure to radiation due to a chemical reaction in the film s polymer. The color change is proportional to the absorbed dose

Answer 28

Radiochromic Film

Question 29

The Fricke dosimeter measures radiation dose based on the oxidation of ferrous ions to ferric ions in a solution. The concentration of ferric ions is proportional to the dose

Answer 29

Fricke Dosimeter

Question 30

MOSFETs detect radiation by measuring the change in threshold voltage caused by radiation induced charge buildup in the MOSFET's oxide layer

Answer 30

MOSFET

Question 31

TLDs

Answer 31

TLDs store energy in crystal lattice defects after radiation exposure, which is released as light when heated. The light intensity is proportional to the absorbed dose

Question 32

Diode

Answer 32

A diode generates an electric current when radiation creates electron hole pairs at a p-n junction The current is proportional to the radiation dose

Question 33

Free Air Ion Chamber

Answer 33

Free air ion chambers measure the ionization produced by radiation in a defined volume of air. The charge collected is proportional to the exposure

Question 34

Farmer Chamber

Answer 34

Farmer chambers are ionization chambers that collect charge produced by radiation in air, with the collected charge proportional to the absorbed dose in a medium e.g. water

Question 35

Parallel Plate Ion Chamber

Answer 35

Parallel plate ion chambers have electrodes arranged in parallel, which collect charge from ionized particles. They are ideal for measuring surface doses and shallow depths

Question 36

Thimble Chamber

Answer 36

Thimble chambers are small ion chambers used for radiation dosimetry, where a gas filled cavity collects charge from ionized particles, providing dose measurements

Question 37

Radiographic Film

Answer 37

Radiographic film darkens when exposed to radiation due to the chemical reaction in the silver halide crystals. The darkness optical density is proportional to the dose

Question 38

Radiochromic Film

Answer 38

Radiochromic film changes color upon exposure to radiation due to a chemical reaction in the film's polymer. The color change is proportional to the absorbed dose

Question 39

Fricke Dosimeter

Answer 39

The Fricke dosimeter measures radiation dose based on the oxidation of ferrous ions to ferric ions in a solution. The concentration of ferric ions is proportional to the dose

Question 40

MOSFET

Answer 40

MOSFETs detect radiation by measuring the change in threshold voltage caused by radiation induced charge buildup in the MOSFET's oxide layer