BK Medical bkSpecto, Advanced User'S Manual

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124 Appendix A August 2018 bkSpecto Advanced User Guide (16-01642-01)
line density
Line density is a measure of how closely spaced the image lines are
in the ultrasound image. Increasing the line density decreases the
frame rate so that you get finer resolution but a slower refresh rate
(frame rate).
MIP
Maximum Intensity Projection (3D imaging). See page 115.
NEMA
Association of Electrical and Medical Imaging Equipment
Manufacturers (National Electrical Manufacturer’s Association)
PACS Picture Archiving and Communications System (DICOM).
PE
Previous examination.
persistence
Persistence is the amount of time over which 2D image frames are
averaged on the monitor. High persistence increases the contrast
in the image, but tissue movement will blur a high-persistence
image.
PG
Pressure Gradient
phased array A technique to control the image area by using time delays on an
array transducer.
PI
Pulsatility index.
planimetry
Measuring the surface area and perimeter of an object by tracing
its boundaries.
POI Point of interest.
Power Doppler See Power mode.
Power mode
Power mode (power Doppler) ultrasound displays information
about the number of particles moving, rather than their velocity.
The signal strength (related to the square of the velocity) increases
as the number of flowing particles increases. Thus the amplitude
of the signal indicates the amount of blood present and flowing
within a sample volume.
power supply cord The cord that connects the system to the wall outlet or power
supply.
PRF
Pulse repetition frequency.
PSA Prostate-specific antigen.
PSAD PSA density: PSA divided by prostate volume.
pulse repetition frequency
The rate at which pulses of ultrasound waves are transmitted and
received in PW (pulsed-wave) Doppler imaging.
Term Explanation