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Title

Radiologic Physics, Part 6: Rectification (1 credit hours)

Abstract

This course is the sixth in a series of seven courses addressing important concepts related to the study of radiation physics. It is recommended that parts one through five of the series be completed before attempting this module; however, chronological course enrollment is not a requirement. This specific course includes fundamental concepts of rectification to include a discussion of the purpose of rectifiers, types of rectification and ripple effect. Course Approval: 1 Category A Credit Expiration/End Date: January 1, 2010

Review exercises in this module require Macromedia Flash Player and Shockwave Player. To download the most recent versions of these applications, click the links below. (Note: This download process requires very little time and is easy to complete).Macromedia Flash Player
Macromedia Shockwave Player

Author

Elsevier Inc.,

This module is adapted from Mosby's Radiography Online: Radiologic Physics, copyright © 2002 - 2004 by Elsevier (USA) reproduced by permission of Elsevier Inc. and edited for use as CE content by Denise Moore, Professor of Radiology, Sinclair Community College.

Objectives

On completion of this module, you should be able to:

Define the important terms in the module.
State why rectification is necessary in x-ray imaging.
Describe how vacuum tubes operate.
Explain why the electrons move from the filament to the anode plate.
Describe the structure of n-type and p-type semiconductor materials.
Explain how the free electrons and positive holes in solid-state diodes allow the transmission of current.
Describe why diodes allow current to flow in only one direction.
Explain the problems presented by half-wave rectification and full-wave rectification.
Explain how full wave-rectification solves the problem of using only half of the alternating current.
Describe the rippling effect and how three-phase generators and high-frequency alternating current solve the problem.

Resources

Bushong S. Radiologic Science for Technologists: Physics, Biology, and Protection. 8th ed. St. Louis: Elsevier Mosby; 2004.

Damjanov I. Pathology for the Health-Related Professions. 2nd ed. Philadelphia: W. B. Saunders; 2000.

Dowd S, Tilson E. Practical Radiation Protection and Applied Radiobiology. 2nd ed. Philadelphia: W. B. Saunders; 1999.

Fauber T. Radiographic Imaging & Exposure. 2nd ed. St. Louis: Mosby; 2004.

Gartner L, Hiatt J. Color Textbook of Histology. 2nd ed. Philadelphia: W. B. Saunders; 2001.

Herlihy B, Maebius N. The Human Body in Health and Illness. 3rd rev ed. Philadelphia: W.B. Saunders; 2007.

Hunkele M. Radiography Essentials for Limited Practice. 2nd ed. Philadelphia: W. B. Saunders; 2005.

Lewis S, et al. Medical-Surgical Nursing. 7th ed. St. Louis: Mosby; 2007.

McCance K, Huether S. Pathophysiology. 5th ed. St. Louis: Mosby; 2005.

James Murrell, MSRS, RT(R)(M)(QM)(CT) (courtesy), Northwestern State University, Shreveport, Louisiana

Statkiewicz-Sherer MA. Radiation Protection in Medical Radiography. 4th ed. St. Louis: Mosby; 2002.

Thibodeau G, Patton K. Anatomy & Physiology. 6th ed. St. Louis: Mosby; 2006.

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