Compton - Study guides, Class notes & Summaries

Attenuation: a. is radiation that emerges from the patient b. describes changes in the x-ray beam as it travels through the patient c. produces only scatter radiation d. occurs only at doses used in radiation therapy - Answer Describes changes in the x-ray beam as it travels through the patient Which photon-tissue interaction makes radiography possible because of its creation of image contrast? a. Compton b. Coherent c. Photoelectric d. Pair production - Answer Photoelectric...

ARRT Registry Practice Test 1 All of the following EXCEPT ___ will result in an increase in AEC response time. a. decreasing the kVp b. Increasing the focal spot size c. increasing the part thickness d. increasing the SID - ANSWER b. increasing the focal spot size Increasing the focal spot size does not change the AEC response time It affects the spatial resolution. Decreasing the kVp increases the exposure time because more photons are absorbed, resulting in...

An image that demonstrates low contrast can be caused from: 1. High mAs 2. Low kVp 3. Insufficient beam restriction correct answer: 3 only Which of the following interactions with matter reduce contrast in an x-ray image? correct answer: compton scattering What type of fracture is illustrated below? (femur bone sticking out of skin) correct answer: compound fx From anatomical position, pronating the hand will result in the palm facing ____ correct answer: posteriorly With all oth...

Natural background radiation represents what amount of human radiation exposure? - 50% The greatest source of natural background radiation exposure is? Cosmic rays radioactive materials the body itself radon gas - Radon gas Cosmic natural background radiation is a part of _______________ _____________ exposure. - Natural background Radon gas: a. Presents a danger when undetected b. Is present in doses proportional to other sources c. Is entirely human-made d. Is the s...

Consider the following dose data from three different CT scans. Which procedure has the highest risk of acquiring radiation-induced cancer? A. Procedure 1: Absorbed Dose = 21 mGy, Effective Dose = 11 mSv B. Procedure 2: Absorbed Dose = 80 mGy, Effective Dose = 3 mSv C. Procedure 3: Absorbed Dose = 34 mGy, Effective Dose = 10 mSv D. All risks are equal correct answers A. Procedure 1: Absorbed Dose = 21 mGy, Effective Dose = 11 mSv Procedure 1 has the highest risk of acquiring radiation-ind...

Fluoroscopy ARRT Exam Study guide Questions With Accurate Answers. What mag modes are available? - answerif you have a 16" II, you can have 12,9,6, and 4.5 " Compton effect - answerhits the outer electron, incomplete transfer of energy, electron released and a low energy xray is deflected photoelectric absorption - answerx-ray totally absorbed by inner shell electron, x-ray overcomes binding energy and knock out the electron and an outer shell electron takes it place. When the outer ele...

Attenuation: a. is radiation that emerges from the patient b. describes changes in the x-ray beam as it travels through the patient c. produces only scatter radiation d. occurs only at doses used in radiation therapy - answer-Describes changes in the x-ray beam as it travels through the patient Which photon-tissue interaction makes radiography possible because of its creation of image contrast? a. Compton b. Coherent c. Photoelectric d. Pair production - answer-Photoelectric ...

Attenuation: A. Is radiation that emerges from the patient B. Describes changes in the x-ray beam as it travels through the patient C. Produces only scatter radiation D. Occurs only at doses used in radiation therapy B. Describes changes in the x-ray beam as it travels through the patient Which photon-tissue interaction makes radiography possible because of its creation of contrast? A. Compton B. Coherent C. Photoelectric D. Pair production C. Photoelectric Which photon-t...

Which of the following contributes significantly to the exposure of the radiographer? A. positrons B. electrons C. compton scatter D. photoelectric effect correct answersC. Small angle scatter will: A. degrade the image by blurring the sharp outline of the structures B. enhance the appearance by clearly delineating the outlines of structures C. enhance the appearance of the image only when a positive contrast medium is used D. occurs only as a result of pair production correct answers...

Low photon energy and high atomic number Combination of photon energy & tissue atomic # results in the highest probability of PE effect *Low photon energy and low atomic number *Low photon energy and high atomic number *High photon energy and low atomic number *High photon energy and high atomic number Step down voltage and step up current How does the filament transformer of the x-ray machine change the shape of electrical power? *Step up voltage and step down current *Step down ...