Samsung ACCUVIX XG Manual do Utilizador descarregar pdf (Página 52)

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Operation Manual

Acoustic Output and Measurement

The terms and symbols used in the acoustic output tables are defined in the following paragraphs.

ISPTA.3 The derated spatial-peak temporal-average intensity (milliwatts per square

centimeter).

ISPPA.3 The derated spatial-peak pulse-average intensity (watts per square centimeter).

The value of IPA.3 at the position of global maximum MI (IPA.3@MI) may be reported

instead of ISPPA.3 if the global maximum MI is reported.

MI The Mechanical Index. The value of MI at the position of ISPPA.3, (MI@ISPPA.3) may be

reported instead of MI (global maximum value) if ISPPA.3 is 190W/cm

Pr.3 The derated peak rarefactional pressure (megapascals) associated with the transmit

pattern giving rise to the reported MI value.

WO The ultrasonic power (milliwatts). For the operating condition giving rise to ISPTA.3,

WO is the total time-average power;. For operating conditions subject to reporting

under ISPPA.3, WO is the ultrasonic power associated with the transmit pattern giving

rise to the value reported under ISPPA.3

Fc The center frequency (MHz). For MI and ISPPA.3, Fc is the center frequency associated

with the transmit pattern giving rise to the global maximum value of the respective

parameter. For ISPTA.3, for combined modes involving beam types of unequal center

frequency, Fc is dened as the overall ranges of center frequencies of the respective

transmit patterns.

ZSP The axial distance at which the reported parameter is measured (centimeters).

x-6,y-6 are respectively the in-plane (azimuth) and out-of-plane (elevation) -6 dimensions in

the x-y plane where ZSP is found (centimeters).

PD The pulse duration (microseconds) associated with the transmit pattern giving rise to

the reported value of the respective parameter.

PRF The pulse repetition frequency (Hz) associated with the transmit pattern giving rise

to the reported value of the respective parameter.

EBD The entrance beam dimensions for the azimuth and elevation planes (centimeters).

EDS The entrance dimensions of the scan for the azimuth and elevation planes

(centimeters).

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Samsung ACCUVIX XG Manual do Utilizador Página 52