MEDRADSC 2AA3 - Lecture 4.6 - Variable Modes of Imaging in Ultrasound

doppler imaging types

colour, spectral, power and micro flow imaging

what type of structures in the body are most advantageous to image using ultrasound?

soft tissue organs

dopper ultrasound

change in transmitted sound frequency caused by a moving object like RBCs, used to detect and measure tissue motion and blood flow direction/velocity

colour doppler

shows the direction of motion of blood

power doppler

shows the magnitude of blood flow

spectral doppler

audible doppler imaging modality

micro-flow imaging

doppler-based imaging used to display very slow moving blood in small vessels

b-flow imaging

non-doppler technology that uses special pulsing of sound and filtering of returning echoes which makes blood more echogenic

elastography

visual depiction through ultrasound of stiffness and elasticity

what are the two type of elastography?

axial strain and shear wave elastrography

what are examples of organs that elastography is beneficially used for?

breast, thyroid, prostate and liver

3D and 4D ultrasound

a sonographic technique that utilizes specialized transducers to acquire a complete volume of information which is rendered into a variety of displays

what is the most recognizable type of 3D ultrasound?

surface rendering, often used for fetal facial imaging

contrast enhanced ultrasound

injection of air-filled microbubbles into the blood stream which is used to assess blood flow patterns in liver and renal masses

what are some additional applications of contrast enhance ultrasound?

adult cardiac imaging of the left ventricular chamber, carotid artery stenosis and gall bladder masses