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Ultrasound Michael Baram. Objectives Basic science Terminology Examples –Movies What we should and should not be doing.

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Presentation on theme: "Ultrasound Michael Baram. Objectives Basic science Terminology Examples –Movies What we should and should not be doing."— Presentation transcript:

1 Ultrasound Michael Baram

2 Objectives Basic science Terminology Examples –Movies What we should and should not be doing

3 Disclosures Becoming more of a techy. I have lost my touch for subclavians I tried to trade my kids in for a machine (It did not work)

4 Anatomy of a wave Velocity = wavelength x frequency High frequency wave travel more linear and reflected easier

5 Velocity through material Velocity of a wave is a constant through a given substance (at a constant temperature) Assumption made all velocity about 1540 m/s MediumSpeed (m/s) Blood 1566 Brain Fat1446 Kidney1567 Liver1556 Muscle Bone Water 1480 Air333 Brass4430

6 How waves are made

7 US- the perfect child

8 Attenuation

9 Reflection of Beam Partial reflection of a sound beam occurs at a tissue interface.

10 Breast Mass or Cyst?

11 Different Waves have different degrees of attenuation

12 Low vs High Frequency 4 MHz 7 MHz

13 Reasons for attenuation

14 GAIN

15 Modes

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19 Attenuation

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21 Shadowing The lateral edge shadow is a thin acoustic shadow that appears behind edges of cystic structures.

22 Shadowing artifact is similar to reverberation

23

24 Terminology Image Interpretation: Anechoic / Echolucent - Complete absence of returning sound waves, area is black. Hypoechoic - Structure has very few echoes and appears darker than surrounding tissue. Hyperechoic / Echogenic - Opposite of hypoechoic, structure appears brighter than surrounding tissue.

25 Terminology Image Acquisition / Probe Positions: Transverse Plane - Also known as an axial plane or cross section, separates the superior from the inferior, or, the head from the feet. Sagittal Plane - Oriented perpendicular to the ground, separating left from right. The "midsagittal plane" is a sagittal plane that is exactly in the middle of the body. Coronal Plane - Also known as the frontal plane, separates the anterior from the posterior or the front from the back. Oblique Plane - The probe is oriented neither parallel to, nor at right angles from, coronal, sagittal or transverse planes. Longitudinal Plane - The longitudinal plane is perpendicular to the transverse plane an can be either the coronal plane or sagittal plane.

26 Probe Types

27 CSUhttp://www.youtube.com/watch?v=fntJ7GLj CSU TSdSlo&feature=channelhttp://www.youtube.com/watch?v=VF_OG TSdSlo&feature=channel MnpRk&feature=channelhttp://www.youtube.com/watch?v=Sb1bM8 MnpRk&feature=channel 7A0r_0&feature=channelhttp://www.youtube.com/watch?v=XpN1R 7A0r_0&feature=channel

28 What we Should and Should Not DO

29 Thank you Any questions

30 Reflection of Beam Partial reflection of a sound beam occurs at a tissue interface.

31 Fast Exam Subxiphoid

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35 bladder

36 ound/http://folk.ntnu.no/stoylen/strainrate/Ultras ound/


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