Transcription of Chapter 12:Physics of Ultrasound - Human Health Campus
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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 Students Chapter 12, INTRODUCTION Diagnostic imagingis generally performed using Ultrasound in the frequency range from2 to 15 MHz The choice of frequ
12.2. ULTRASONIC PLANE WAVES 12.2.1. One-Dimensional Ultrasonic Waves Euler’s equation , which can be derived starting from Newton’s second law of motion: Equation of continuity, which can be derived by writing a mass balance for an inc remental volume of the medium: ( ) ( ), 0 1, 2 2 2 2 2 = ∂ ∂ − ∂ ∂ p xt c t p xt x
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