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Question: X-ray is:Answer: proportional to frequency Question: Which of the following is true about both a 100 keV x-ray and a 10 keV ray?Answer: They have wavelengths Question: When the of electromagnetic radiation is increased tenfold:Answer: the decreases to 1/10 Question: A single unit of radiation is also called a/an:Answer: Question: Light has a constant of c=3x108 m/s ThereforeAnswer: Its frequency decreases with wavelength Question: The frequency of electromagnetic radiation Answer: in hertz Question: When one uses the sine wave as a Answer: the distance from one peak to the next is the Question: Given the sine wave model of radiationAnswer: frequency times wavelength is a Question: Which of the has a constant value for all electromagnetic radiationAnswer: Velocity Question: The amplitude of a sine wave is Answer: Zero to Question: The frequency of a sine wave Answer: the number of valleys that pass per Question: The wave equation is as followsAnswer: is velocity divided by frequency Question: When the spectrum is considered, photons of a radio broadcast have relativeAnswer: Low and long wavelengths Question: The principle between x-rays and gamma rays are theirAnswer: Question: Radiation emitted from a radio broadcast antennaAnswer: Is radiation Question: For any electromagnetic Answer: An increase in frequency results in an increase in Question: If an x-ray imaging system is operated at 40 kVp Answer: 20 keV x-rays will be Question: Which of the following characteristics is the same for both ultraviolet radiation and ?Answer: Velocity Question: Visible light cannot Answer: Weighed Question: X-rays can Answer: Attenuated Question: The spectrum includesAnswer: X-rays and radar with the of light in a vacuum Question: Which of the following is not a of the wave model of radiation?Answer: Question: Which of the most closely represents the term attenuation?Answer: light transmitted frosted glass Question: When a radiograph is , one might properly state thatAnswer: lung is radiolucent Question: The development of quantum mechanics is attributed toAnswer: max Question: According to mechanics the energy of an x-ray isAnswer: inversely proportional to its Question: Which of the following statements about light is true?Answer: It behaves like a wave Question: . Visible Answer: of a shorter wavelength red radiation and long wavelength blue radiation Question: Which of the following terms is not associated with visible interaction?Answer: Question: statement about visible light is correct?Answer: If visible light is transmitted unattenuated the is lucent Question: In radiographs of bony embedded in soft tissue the bone isAnswer: radiopaque Question: Which of the following statements photon interaction is true?Answer: Lead is Question: Which type of electromagnetic is not used for medical imaging?Answer: Question: When compared with visible light x-rays have Answer: Question: of the following types of electromagnetic radiation interacts with matter such as a particle?Answer: Gamma Question: At what should visible light interact most readily?Answer: Question: A source of99mTe produces a radiation intensity of 150mR/hr. at 10mR. At what does the exposure rate equal to 1000mR/hr.?Answer: 3.9 Question: If the exposure rate 1m from a is 9 mR/hr. what is the exposure rate 3, from the source?Answer: 1 mR/hr. Question: The square law statesAnswer: intensity is inversely proportional to the of the distance Question: The inverse square law is a ofAnswer: Question: The inverse square applies to which of the following sourcesAnswer: Point Question: of the following emissions is likely to obey the inverse square law?Answer: X-rays from mobile unit Question: To apply the inverse square law one must Answer: Two and one intensity Question: If the distance from a point source is the intensity will beAnswer: one Question: If an instrument positioned 1m from appoint source is moved 50 cm closer to the source the radiation will beAnswer: increased by a of 4 Question: The distance from the earth to the sun is 150 million km. If the earth were orbiting the sun at 50 million km the solar intensity on the surface of the earth would beAnswer: 9 times more Question: A source used from instrument calibration has an intensity of 100mR/hr. at 20 cm. What would the intensity be 40 cm from the source?Answer: 25 mR/hr. Question: The exposure rate from a 60Co source used in radiation therapy is 100 mR/hr. at 80 cm. What be the exposure rate at 40 cm from the source?Answer: 400 R/hr. Question: A radiographic technique produces a patient dose of 200 mrad at a source to skin distance of 80 cm. What the patient dose be at an SSD of 160 cm if the technique remains the sameAnswer: 50 Question: A radiographic technique produces an of 200 mR at a source to image receptor distance of 100 cm. What would the exposure rate be at an SID of 180 cm?Answer: 111 Question: A radiograph produced at an SID of 100 cm results in an of 100mR. What would be the exposure if the SID were reduced to 90 cm?Answer: 123 Question: of the following terms is associated with diagnostic imaging?Answer: X-rays Question: Which of the following terms does not to an x-ray?Answer: Question: Given two x-rays, one of and the other at 70keV x-ray, the 70 keV hasAnswer: Has a frequency Question: In the representation of an x-rayAnswer: Velocity is the of light Question: The energy of an x-ray is directly proportional to itsAnswer: Frequency Question: Which of the is greater for a 30 keV x-ray than a 60keV x-rayAnswer: Question: of the following electromagnetic radiations is in the diagnostic x-ray regionAnswer: 65 Question: When x-rays are it can be said thatAnswer: they are deflected by a very strong Question: x-ray Answer: have a higher frequency than light Question: The of an x-rayAnswer: is inversely to its wavelength Question: The used to describe an x-ray photonAnswer: is a sine Question: of the following characteristic is the same for both x-ray photons and light photonsAnswer: Velocity is the Question: X-raysAnswer: have zero rest mass and velocity Question: Diagnostic x-rays Answer: high electromagnetic radiation Question: An x-ray can be called aAnswer: Question: 4 of a Photon:Answer: 1) Wavelength 2) Frequency 3) Velocity 4) Question: quantum:Answer: Bundle(amount) of Question: Define x-ray :Answer: A quantum of electromagnetic Question: 1/2 the range from crest to valley over which the sine wave .Answer: Amplitude Question: is peak kVp represented on the sine wave?Answer: The very top(crest) of the amplitude portion of the sine Question: 1 cycle = _______ alternationsAnswer: Question: How many in 1 second?Answer: 60 Question: How many alternations in 1 ?Answer: 120 Question: on the sine wave of voltage does voltage measure 0?Answer: the part that the time line (equilibrium) Question: The sine wave portion above the time line what?Answer: The Question: What direction is the current moving if the sine line is the time line? Below the time line?Answer: ; Backward Question: The ____________ is the part of the wave where it extends from 0 (+/-) and returns to 0.Answer: Question: The number of oscillations per second is the ___________________.Answer: Question: y=Answer: Question: What is frequency; Symbol for and unit of measure:Answer: How the crest occurs; nu; hertz Question: Wavelength is the distance between the ________ of a _________; Symbol is _______; Unit of measure is _________.Answer: of a wave; λ-lambda; Å-Angstrom Question: of λ-min:Answer: Lambda min= wavelength=strongest photon in the beam of radiation Question: What is the between wavelength and frequency:Answer: Inversely Question: Formula for the speed of (C):Answer: C=μλ Question: 3 Regions for the Spectrum:Answer: Visible light Radio x-Radiation Question: Electromagetic spectrum from wavelength: lowest frequency to shortest wavelength: Highest frequencyAnswer: Radio frequency Microwaves Infra-red Visible light Ultra Violet Light X-Ray Gamma Question: When pure energy acts as though it has the characterists of :Answer: Wave-Particle Phenomenon Question: Term for light deviated from its line of :Answer: Refraction Question: Substance that absorbs radiation is ___________ and appears __________ on a radiograph.Answer: Radiopaque; clear or light Question: A substance that attenuates radiation is termed ___________ and appears _____________ on a radiograph.Answer: ; Dark Question: What does the Model: Quantum Theory state:Answer: X-rays are created and exist at the speed of light or dont at all. X-rays are directly proportional to frequency Question: to the Particle Model: Quantum Theory, x-rays are directly proportional to what?Answer: Frequency Question: What is the Law of Conservation of ?Answer: Energy can never be or destroyed: E=mc² |
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