Pressure Alignment Rotation Tilt Improves the image by reducing the distance to target structures through compression of subcutaneous tissuesCan be sued to compress veins or move structures out of the wayCare needs to be taken not to use excessive pressure which...
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...
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...
Artefact can be defined as: An appearance that does not accurately correspond to the true image of the examined area Artefacts can often be recognized by altering the image plane, depth, or frequency An unusual object should be viewed from multiple directions to...
‘Spatial pulse length’ is the product of the wavelength and the number of cycles in a pulse A shorter wavelength (and thus higher frequency) results in a shorter spatial pulse length Resolution is determined by the ‘spatial pulse length’ of the...
