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Chapter 12:Physics of Ultrasound - Human Health Campus

IAEAI nternational Atomic Energy AgencySlide set of 54 slides based on the Chapter authored Lacefieldof the IAEA publication (ISBN 978-92-0-131010-1):Diagnostic Radiology Physics: A Handbook for Teachers and StudentsObjective:To familiarize students with Physics or Ultrasound , commonly used in diagnostic imaging 12:Physics of UltrasoundSlide set preparedby (S. Paulo, Brazil, Institute of Physics of S. Paulo University) . Introduction . Ultrasonic Plane . Ultrasonic Properties of Biological . Ultrasonic . Doppler . Biological Effects of UltrasoundChapter OF CONTENTSD iagnostic Radiology Physics: a Handbook for Teachers and Students Chapter 12, INTRODUCTIOND iagnostic Radiology Physics: a Handbook for Teachers and Students Chapter 12,3 Ultrasoundis an acoustic wave with frequencies greater than the maximum frequency audible to humans, which is 20 kHz Ultrasoundis the most commonly used diagnostic imaging modality, accounting for approximately 25% of all imaging examinations performed worldwide nowadaysIAEAD iagnostic Radiology Physics: a Handbook for Teachers and Stu

12.2. ULTRASONIC PLANE WAVES 12.2.3. Reflection and Transmission Acoustic version of Snell’s law θr =θi t i c c sinθ sinθ 1 = 2 A plane wave traveling in a semi-infinite half-space that is incident upon a planar interface with a second semi-infinite half-space The wave transmitted into the second mediumis benttowardthenormal if c 1 >c

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