'Sound beam' diaporamas de présentation

A r t i f a c t s

A r t i f a c t s. Artifacts. - are echoes that appear on the image but do not have a true correspondence to an anatomical structure. It is important to recognize them so that they may be ignored, eliminated or made useful. Artifacts. Not real Missing information Improperly represented

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USG PHYSICS

USG PHYSICS. CHARACTERISTICS OF SOUND. Properties of sound : Requires medium for its transmission. Form of energy. Longitudinal wave : passes as Compressions and rarefactions. Propagation. Wavelength of sound wave. Velocity of sound- Independent of frequency

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Quality Assurance in Diagnostic Medical Sonography HHHoldorf

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Ultrasound Physics

821 views • 44 slides

Alternative Imaging

Alternative Imaging. Chapter 21. Introduction. Other modalities have assumed prominence in imaging field, especially for diagnosis of diseases that are often difficult to see on radiographs. Imaging techniques are complementary to radiography. Ultrasonography.

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Chapter 12 Image Artifacts

Chapter 12 Image Artifacts. Assumptions for two-dimensional echo mapping. Violations of these assumptions produce artifacts in the image: The transmitted wave travels along a straight-line path from the transducer to the object and back to the transducer.

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Advanced Imaging

Advanced Imaging. Panoramic Imaging. Since the near-field image width limited by width of transducer, difficult to obtain a wide view of shallow structures Transducer moved along patient's anatomy Multiple images blended to form single long image with wide field of view

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