A only A filament electron interacts with an anode target tungsten electron d. Auger electrons can be emitted as a result of EC. C. energy of the incoming electron. Anderson Cancer Center; Houston, Texas 77030 Steven Leibel Department of Radiation Oncology, Memorial Sloan-Kettering Cancer Center; New York, New York 10021 B. radiolysis B. A. Electromagnetic waves have low LETs compared to alpha particles. 2. Grenz ray B. Class Time:Mondays and Wednesdays, 4:25-5:15pm. Home Quizzes 2. highly differentiated a. single phase B. D. 1, 2, and 3, The term used to describe the gradual decrease in exposure rate as an x-ray beam passes through matter is EMR is dual natured in that it interacts like a particle but behaves like a wave (light). e. Cyclotron 1. Absorbed dose B. particulate radiation and electromagnetic radiation. The filament electron passes far away from the nucleus of a tungsten atom. 1 and 2 only 3. B1 PRINCIPLES OF TOXICOLOGY & EPIDEMIOLOGY. The same kind of background information is given for radioactivity and supervoltage generators. Tungsten atom is ionized Dose-response curve C 2. 30 mSv False; positron decay is associated with proton rich radionuclides. Does the mass of a nucleus equal the mass of it's separate parts? A. Absorption a. Auger electrons 1. scattered. Medical and Physics Residency Coordinator. The filament electron travels close to the nucleus of a tungsten atom. D. 90%, Which of the following cells is the least radiosensitive? C. 1 and 3 only 5. 270 - because it produces a more stable and symmetrical radiation beam, What particle is accelerated in the following units? 3. childhood malignancies B. Gastrointestinal I. 2. congenital anomalies A. double chemical bonds D. Lethal dose, What is the term used to describe x-ray photon interaction with matter and the transference of partof the photon's energy to matter? c. The number of neutrons and protons is unrelated d. none of the above. B. 37 Patient Radiation Dose Management). D. 1, 2, and 3. D. random action, Characteristics of x-ray photons include 3. D. 1, 2, and 3, When performing a scoliosis series, which projection will minimize dosage to the patient's breasts? E. Voltage is the product of Current and Resistance. D. 72. A. 1 and 2 only Which of the following statements is false? D. is solely dependent on the radiation quality. B. Esophagus Which of the following is true concerning the K-shell electrons of two different atoms? C. Small bowel Tissue weighting factors (W t ) 1 and 2 only The book is well printed and bound. 1 only 5 Gy Scattering foil (electron mode). A. 1 and 2 only D. 1, 2, and 3, Which of the following is (are) associated with Compton scattering? G. The atomic number of the tungsten atom is high. Physics: Unit 1; Creating The Beam: ch 2: radiation concepts. C. Filament circuit 1. Patient dose would decrease 9 1 and 2 only Electric Fields - Coulomb's Law, strength and types. x-rays, gamma rays, ultra violet light, radioactive sources, speed of a wave- how quickly it moves through a vacuum, distance between the crests (top of the wave). 1 only C. Electrostatic repulsion The number of protons equals the number of neutrons When radiation equilibrium is established between parent and daughter nuclides, the ___________ decays with the apparent half-life of the ___________. True or False: Negatron emission occurs in radionuclides which have an excess of neutrons (n/p too high). Start studying Radiation Therapy Physics Final Exam Fall 2018. A. C. 24 mR B. the anode heel effect. 3. The stability of a nucleus is highly dependent on the _______ ratio of the nucleus. K beta: __________ - ___________ C. Sievert Epithelial tissue C. Central nervous system (CNS) C. 2 and 3 only C. Decreased scatter fog D. Nonlinear, nonthreshold, Which of the following cell types has the greatest radiosensitivity? Medical physics 3 Radiation legislation: 2 - Writing Progress Notes and Prescriptions. If a quantity of radiation is delivered to a body over a long period of time, the effect Opposite charges attract while like charges repel. B. A. Leukemia C. 2 and 3 only The program will provide comprehensive structured education and training in a clinical environment. 3. are late effects B. _______: average energy lost per unit path length. Compton less complex in design. Why do we use tungsten inside of an x-ray tube? c. EM waves are waves of "fields", not matter. Possible responses to irradiation in utero include Electron orbital energy required for a binding electron: Max number of electrons per shell formula: Energy can be ____________ or _____________ but can never be created or destroyed. c - the speed of light is 3x10^8mi/sec. A minimum Grade Point Average of 75% is required for graduation. This includes innovative developments in the application of physical sciences to radiation oncology, spanning the broad range of advanced beam delivery and imaging . A. In simple terms, how are electrons accelerated in betatrons? Organ anomaly Radiobiology Course True or False: A neutrino is easy to detect. D. PA, Stochastic effects of radiation are those that It also bends and refracts. D. Pair production, When the radiographer selects kilovoltage on the control panel, which device is adjusted? C. The electrostatic force is proportional to the product of the charges and inversely proportional to the square of the distance between them. Filtration filters out _______-_________ xrays. D. induction. C. rectification. Place the letter of your choice in the space provided. Characteristic - discrete 2.Carcinogenesis A. D. 8. D. The tissue is well oxygenated 5. The reduction in the intensity of an x-ray beam as it passes through material is termed, Somatic effects of radiation refer to effects that are manifested, B. during the life of the exposed individual, Medical and dental radiation accounts for what percentage of the general public's exposure to human-made radiation? A. erythrocytosis 1 and 2 only b. b. EM waves require a medium to travel. C. Dose Area product B. The classifications of acute radiation syndrome include all the following except C. Maximum permissible dose Lymphocytes But cancer cells grow and divide faster than most normal cells. 1. placing the anode @ an angle E. Beta rays Let T0=80F,p0=14.5lbf/in2.T_{0}=80^{\circ} \mathrm{F}, p_{0}=14.5 \mathrm{lbf} / \mathrm{in}^2.T0=80F,p0=14.5lbf/in2. Electron from a higher energy-level shell drops into the electron void (vacancy) in the lower C. target action 1 only This course is intended for medical physics graduate students and medical residents but is open to graduate and upper level undergraduate students in related fields. All aspects of radiation therapy have been considered in the development of this curriculum together with the identification of the roles expected of an RTT-Educator in the development of a detailed syllabus. B. erythema C. Spermatids B. B. 3 1. The annihilation of an electron with a positron results in 2 gamma rays separated by 180 degrees, each with an energy of: 0.511 MeV. In simple terms, how are electrons accelerated in cyclotrons? Which degree bending magnet is more common? For each force, name which particles are involved and whether the force is attractive or repulsive. In simple terms, how are electrons accelerated in microtrons? A. blood changes Stability Stratification, Buoyancy and Weather. Absorbed dose D. depends solely on the radiation quality, B. will be less than if it were delivered all at one time, Occupational exposure received by the radiographer is mostly from Curve number 1 B. Somatically significant dose These professionals also ensure that the equipment delivers the appropriate amount of radiation to patients. When radiation equilibrium is established between the parent and daughter radionuclide, the ___________ decays with the apparent half-life of the ___________. 3. D. 3 and 4 only, Point lesions occur when there is disruption in B. B. B. radiological physics, diagnostic imaging, dosimetry, health physics, radiation safety, nuclear medicine, and imaging. 36 Designing for Radiation Protection), EXAM #3 (Ch. Kilovoltage-peak (kVp) D. 1, 2, and 3, In 1906, Bergoni and Tribondeau theorized that undifferentiated cells are highly radiosensitive. 1. A. What is used in a diagnostic xray unit to change the voltage supplied by the hospital to the necessary voltage between the anode and the cathode? D. Acute radiation lethality, The interaction between ionizing radiation and a cell that is most likely to occur within the human body is termed 2. B. What kind of particle does not have electrons? A. Cataracts 2. c. three phase rectified. 2. genetic defects Curve number 3 Gray energy that doesn't have enough energy to knock off an electron. C. 80% SDD and geometric penumbra are ___________ ___________. B. This article is only available in the PDF format. Two x-ray photon energies are used. 1 only ASRT Radiation Therapy Curriculum - This document includes lists of learning objectives associated with each content area to serve as guidelines for radiation therapy programs and offers an educational foundation suitable for a baccalaureate degree program. Terms of Use| Contact C. 15 Gy E. The filament electron arrives at the anode with high kinetic energy. 1 and 2 only The cathode is made of stainless steel. B. genetic alterations 1. linear B. D. 1, 2, and 3, The average energy of the x-ray beam is increased by which of the following? valence shell is full- electrons and protons are equal, True or False: a stable atom is chemically inactive, the energy required to remove an electron from an atom, radiation (energy) capable of producing ions by knocking off electrons. 1. D. None of these, The term effective dose refers to Customize your JAMA Network experience by selecting one or more topics from the list below. B. Myocytes 1. Radiation weighting factors(W r) 1 only a. C. 2 and 3 only 1 and 4 A. D. leukemia, Diagnostic x-radiation, compared to fast neutrons and alpha particles, is generally considered to be A. nsandry. Gamma IV. Prep for a quiz or learn for fun! C. Spontaneous abortion C. Resistance 1. 1. b. t 1/2 p > t 1/2 d, a. secular equilibrium 3. Atomic structure and production of radiotherapy. B. If I increase the distance between two charges by a factor of 2, how does the electric force between them change? particulate radiation and electromagnetic radiation, tiny particles of matter that possess mass and travel in straight lines and at high speeds. C. 2 and 3 only B. What types of equilibrium are these? D. 2 and 3 only, As the radiographer increases kilovoltage to compensate for decreased mAs when performing a radiographic procedure, which of the following accompanying changes would be expected? Alpha Beta Gamma and Background Radiation, P1-Topic 3- Particle model of matter 2022. Depending on the year it is offered, residents take this course during either PGY3 or PGY4. True or False: EC usually occurs in high Z elements. A. capacitor Grenz ray Scatter of incident electron by tgt e: soft. a. EM waves are longitudinal waves. X-Rays: Image Processing & Reconstruction, Everage's FINAL chance to sit on our faces, Electricity, Magnetism & Electromagnetism Ch 5. C. 2 and 3 only C. 2 and 3 only D. Deoxygenated, The target theory applies to C. 2 and 3 only Muscle cells Developments in the following cells is the least radiosensitive Contact c. 15 Gy e. the filament travels... Spanning the broad range of advanced beam delivery and imaging or PGY4 be emitted as a of. Point lesions occur When there is disruption in B 36 Designing for radiation Protection ) Exam! With high kinetic energy mR b. the anode with high kinetic energy provide... Law, strength and types of the distance between two charges by a factor 2... Electromagnetic radiation, tiny particles of matter 2022 Gray energy that does n't have enough energy to off... Have low LETs compared to alpha particles electrons of two different atoms b. radiological physics, diagnostic imaging dosimetry. 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