Radiation Physics and Protection Indian Medical PG Flashcards - Medical Study Cards
Master Radiation Physics and Protection with OnCourse flashcards. These spaced repetition flashcards are designed for medical students preparing for NEET PG, USMLE Step 1, USMLE Step 2, MBBS exams, and other medical licensing examinations.
Radiation Physics and Protection Flashcard Deck - 51 Cards
Flashcard 1: Optical Coherence Tomography uses the principle of _____
Answer: near-infrared light interferometry
Flashcard 2: <_____ rads/year is the permissible level of radiation
Answer: 5
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Flashcard 3: we receive _____ rad radiation from an x ray
Answer: 0.2-0.3
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Flashcard 4: wearing _____ decreases dose of x rays by >90%
Answer: lead aprons
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Flashcard 5: _____ rays is the most harmful ionising radiation
Answer: alpha
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Flashcard 6: flouroscopy gives _____ rad radiation
Answer: 4
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Flashcard 7: _____ imaging, is an inversion recovery technique that nulls fat from T2
Answer: STIR
Flashcard 8: SI unit of absorbed radiation is _____ and the common unit is RAD.
Answer: Gray
Flashcard 9: CT head has a radiation exposure of _____ to 150 chest X-ray
Answer: 100
Flashcard 10: The absorbed dose of ionizing radiation _____ very gradually with greater depth and lower speed, suddenly rising to a peak when the proton is ultimately stopped. This is known as Bragg peak.
Answer: increases
Flashcard 11: _____ are produced when the electron beam decelerates close to the nucleus of the atom in the anode.
Answer: X-rays
Flashcard 12: In the modern X-Ray tube, the _____ode is made of tungsten+thorium
Answer: cath
Flashcard 13: The active ingredient in X-Ray film is _____ and silver iodide
Answer: silver bromide
Flashcard 14: Fast-moving electrons interact with _____ of atom of anode, to produce characteristic spectrum radiation (20%)
Answer: inner shell
Flashcard 15: Fast-moving electrons interact with _____ of anode, to produce continuous spectrum radiation, also called as Bremsstrahlung radiation (80%)
Answer: nucleus field
Flashcard 16: X-ray films are most sensitive to _____ light and least sensitive to red light
Answer: blue
Flashcard 17: In the modern X-Ray tube, the _____ode is made of tungsten+10% rhenium
Answer: an
Flashcard 18: Contrast of an X-ray is _____ proportional to kVP and directly proportional to mAS
Answer: inversely
Flashcard 19: The photoelectric effect is an interaction between _____ energy X-ray beam and the inner shell electron.
Answer: low to intermediate
Flashcard 20: The _____ is the frequency, the more is the energy of an electromagnetic wave
Answer: more
Flashcard 21: The half-life of radioactive I 131 is _____
Answer: 8 days
Flashcard 22: Gamma and X-rays are _____ type of ionizing radiation
Answer: electromagnetic
Flashcard 23: The only indication for performing an X-ray in a pregnant woman is _____
Answer: Trauma
Flashcard 24: The recommended dose limit of cumulative radiation exposure during pregnancy is _____.
Answer: 1mSv
Flashcard 25: Mechanism of heat loss in the classical X-ray tube is _____
Answer: conduction
Flashcard 26: Optical Coherence Tomography uses the principle of _____
Answer: near-infrared light interferometry
Flashcard 27: Who is the father of X-Ray?_____
Answer: W.C. Roentgen
Flashcard 28: Father of CT scan is _____
Answer: Godfrey Hounsfield
Flashcard 29: What is the SI unit for radioactivity?_____
Answer: becquerel
Flashcard 30: CT abdomen has a radiation exposure of _____ chest X-ray
Answer: 500
Flashcard 31: Milliampere second determines the amount of _____
Answer: radiation exposure
Flashcard 32: In the modern X-Ray tube, the outer tube is made of _____
Answer: stainless steel
Flashcard 33: _____ rays have the maximum tissue penetrating ability.
Answer: Gamma
Flashcard 34: MRI rooms are shielded completely by a continuous sheet or wire mesh of copper called _____, which provides RF shielding.
Answer: Faraday cage
Flashcard 35: Re186 is a pure _____ emitter
Answer: +gamma (radiation)
Flashcard 36: _____ is arbitrarily assigned a value of +1000 HU
Answer: Cortical bone
Flashcard 37: _____ rays have the maximum ionising potential but least penetrating ability
Answer: Alpha
Flashcard 38: How are X-Ray artefacts produced?_____
Answer: Patient movement
Flashcard 39: When the voltage (kVP) increases, penetration of X-rays _____
Answer: increases
Flashcard 40: The magnetic field strength of MRI machines is measured in _____
Answer: Tesla
Flashcard 41: _____ waves have the highest molecular mass
Answer: Alpha
Flashcard 42: _____ is arbitrarily assigned a value of 0 HU
Answer: Water
Flashcard 43: Alpha and beta rays are _____ type of ionizing radiation
Answer: particulate
Flashcard 44: _____ is arbitrarily assigned a value of -1000 HU
Answer: Air
Flashcard 45: Mechanism of heat loss in the modern X-ray tube is _____
Answer: radiation
Flashcard 46: What is the SI unit for radiation exposure?_____
Answer: Coulumb/kg
Flashcard 47: P32 is a pure _____ emitter
Answer: beta (radiation)
Flashcard 48: High energy X-ray is not capable of photoelectric effect due to random scattering from outer shell known as the _____ Effect
Answer: Compton
Flashcard 49: Is x-ray done as a part of primary survey in pregnant women?_____
Answer: Yes
Flashcard 50: _____ is used to monitor radiation dose in India
Answer: TLD badge (Thermoluminescent dosimeter)
Flashcard 51: Cobalt 60 emits _____ particles and gamma radiation.
Answer: beta
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