Compton effect - Study guides, Class notes & Summaries

Question Number: 399 Detection and Measurement In NTE (nuclear track emulsion) film, the tracks are caused by: A) alpha particles. B) beta particles. C) gamma photons. D) recoil neutrons. E) recoil protons. The correct answer is: E In this fast neutron responsive dosimeter, recoil protons from elastic scattering with hydrogen atoms in the film create short "tracks" of ionization as stable silver atoms are created. These tracks are counted either by eye or mechanically and equated...

what mag modes are available? - Answer if you have a 16" II, you can have 12,9,6, and 4.5 " Compton effect - Answer hits the outer electron, incomplete transfer of energy, electron released and a low energy xray is deflected photoelectric absorption - Answer x-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 electron moves to its new place, a characteristic x-ray is for...

Which of the following will decrease the amount of scatter radiation produced? a. increasing the x-ray field size b. decreasing the x-ray field size c. increasing the grid ratio d. decreasing the grid ratio correct answer: b. decreasing the x-ray field size Which of the following is not a type of beam restrictor? a. aperture diaphragm b. positive beam-limiting device c. cylinder d. lead shield correct answer: d. lead shield As collimation decreases, the quantity of scatter ra...

_____ 1. X-ray photon passed through atom unchanged; no interaction _____ 2. Coherent scatter _____ 3. Photoelectric effect _____ 4. Compton scatter _____ 5. Bremsstrahlung radiation _____ 6. Radioactivity A. Electrons stop suddenly as they hit the anode. B. Ionization takes place when the photon ejects an outer shell electron. This results in the loss of energy for the photon and a negative charged electron. The low energy photon changes direction. C. An unstable atom releases energy...

X-rays: Typical diagnostic wavelength and photon energy range. - Answer-100ev-200 keV min. wavelength 6pm-12nm Structure and function of the x-ray tube. - Answer-A vacuum tube with an anode and a cathode. The cathode is heated and electrons are emitted, they are accelerated by a voltage difference in the tube. When the "brake" against the material of the anode, they release their high kinetic energy in the form of an x-ray. *x-ray tubes are of very low efficiency, most of the radiation i...

MC CHAPTER 16 QUESTIONS AND ANSWERS WITH SOLUTIONS 2024 The ratio of the remnant beam intensity to the primary beam intensity is the: a. exposure b. attenuation or absorption c. scatter d. penetration e. secondary radiation - ANSWER penetration To increase the subject contrast in the remnant beam, you must: a. reduce Compton and photoelectric interactions in the patient by an equal amount b. reduce Compton interactions more than you reduce photoelectrics c. reduce photoele...

What is the ratio of dose at depth in tissue to the dose at electronic equilibrium (Dmax) on the beam axis known as? - ️️PDD What is the TD5/5 for the optic chiasm? - ️️60 Gy What is the term for a representation of the dose in an irradiated volume as a function of spatial position along a single line? - ️️dose profile What is the term for blue coloring of skin or nails, observed as a sign of low oxygen content? - ️️cyanosis What is the term for the procedure used in which an...

X-rays: Typical diagnostic wavelength and photon energy range. - 100ev-200 keV min. wavelength 6pm-12nm Structure and function of the x-ray tube. - A vacuum tube with an anode and a cathode. The cathode is heated and electrons are emitted, they are accelerated by a voltage difference in the tube. When the "brake" against the material of the anode, they release their high kinetic energy in the form of an x-ray. *x-ray tubes are of very low efficiency, most of the radiation is dissipated as ...

Which of the following reduces the scatter radiation reaching the detectors? A. Post-patient collimation B. Pre-patient collimation C. Pre-detector collimation D. Both A & C - correct answer D. Both A & C Which of the following is the primary interaction between x-ray photons and tissue during computed tomography? A. Bremsstrahlung B. Characteristic C. Compton effect D. Coherent scatter - correct answer C The process by which electrons are produced at the cathode of a CT ...

Which type of x-ray interaction results in the complete absorption of the incident photon by an orbital electron: A. Compton effect B. Photoelectric effect C. Classical scattering D. Pair production - B. Photoelectric effect Which bony landmark is commonly used for central ray location on an AP chest projection: A. Jugular notch B. T7 spinous process C. Vertebrae prominens D. Xiphoid process - A. Jugular notch What is the single, most important step radiographers can take to protect t...