What types of ultrasound probes are available?

Probes can be characterized according to their: Shape Arrangement of the piezoelectric crystals Frequency range Footprint In general they are classified as: Type Linear-Array Curvilinear (Convex) Array Phased Array Endocavity Description Crystals arranged in a linear...

What are the benefits and uses of high and low-frequency probes?

Type Description Use High-Frequency Probes 6-15 MHz rangeGood resolution (0.5 mm axial and 1.0 mm lateral)Reduced penetration (5-6 cm depth of field) Vascular accessSuperficial nerve blocks (supraclavicular and axillary brachial plexus, forearm, femoral...

Which imaging modes can be used with ultrasound?

A-Mode(Amplitude Mode) B-Mode(Brightness Mode) M-Mode(Motion Mode) Doppler Mode Simplest form of imaging using a single wave emitted from the probeScans a line through the body with echoes plotted as a function of depthRarely used in intensive care or anaesthesiaUsed...

What is the doppler effect?

Describes the change in the transmitted frequency of a sound wave (ft) compared to the reflected (observed) frequency of the wave (fr) that occurs due to the relative motion between the observer and the source If the source and the observer are stationary any waves...