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Principles of Radiation Therapy

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In gynecology, radiation therapy is most commonly used for which of the following?

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a. Cervical cancer

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b. Endometrial cancer

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c. Epithelial ovarian cancer

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d. Gestational trophoblastic neoplasia

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Which is a clinically used radionuclide?

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a. Cobalt-60

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b. Iodine-125

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c. Cesium-137

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d. All of the above

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Linear accelerators can produce which of the following?

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a. Photon and electron beams

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b. Photon beams and gamma rays

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c. Neutron beams and gamma rays

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d. Electron beams and gamma rays

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When electromagnetic radiation impacts target tissues, this energy is transferred to the target tissues by several mechanisms. Which of the following mechanisms is shown here?

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Reproduced, with permission, from Nguyen PD: Principles of Radiation Therapy. In Hoffman BL, Schorge JO, Schaffer JI, et al (eds): Williams Gynecology, 2nd ed. New York, McGraw-Hill, 2012, Figure 28-4B.

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a. Poiseuille law

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b. Compton effect

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c. Werner equation

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d. Bernoulli principle

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For treatment of inguinal lymph node metastasis, which of the following modalities is preferred due to its energy-transfer properties?

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a. Photon beam therapy

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b. Electron beam therapy

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c. Intracavity brachytherapy

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d. Interstitial brachytherapy

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When quantifying the absorbed dose of electromagnetic radiation, which of the following units of measure is currently preferred?

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a. Rad

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b. Gray

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c. Curie

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d. Becquerel

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