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Dosimetry Physics 1 > Radiation Measurement Devices 2 > Flashcards

Radiation Measurement Devices 2 Flashcards

1
Q

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

A

TLDs

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2
Q

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

A

Diode

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3
Q

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

A

Free Air Ion Chamber

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4
Q

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

A

Farmer Chamber

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5
Q

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

A

Parallel Plate Ion Chamber

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6
Q

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

A

Thimble Chamber

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7
Q

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

A

Radiographic Film

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8
Q

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

A

Radiochromic Film

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9
Q

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

A

Fricke Dosimeter

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10
Q

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

A

MOSFET

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11
Q

TLDs

A

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

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12
Q

Diode

A

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

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13
Q

Free Air Ion Chamber

A

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

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14
Q

Farmer Chamber

A

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

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15
Q

Parallel Plate Ion Chamber

A

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

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16
Q

Thimble Chamber

A

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

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17
Q

Radiographic Film

A

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

18
Q

Radiochromic Film

A

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

19
Q

Fricke Dosimeter

A

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

20
Q

MOSFET

A

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

21
Q

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

22
Q

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

23
Q

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

A

Free Air Ion Chamber

24
Q

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

A

Farmer Chamber

25
Q

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

A

Parallel Plate Ion Chamber

26
Q

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

A

Thimble Chamber

27
Q

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

A

Radiographic Film

28
Q

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

A

Radiochromic Film

29
Q

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

A

Fricke Dosimeter

30
Q

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

31
Q

TLDs

A

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

32
Q

Diode

A

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

33
Q

Free Air Ion Chamber

A

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

34
Q

Farmer Chamber

A

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

35
Q

Parallel Plate Ion Chamber

A

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

36
Q

Thimble Chamber

A

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

37
Q

Radiographic Film

A

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

38
Q

Radiochromic Film

A

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

39
Q

Fricke Dosimeter

A

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

40
Q

MOSFET

A

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

Dosimetry Physics 1 (7 decks)

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