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Reference Manual 109

Acoustic Power Tables

IEC Tables

Symbols and Denitions

Standard 60601-2-37 published by the International Electrotechnical Commission (IEC)

requires the declaration of acoustic output information. The denitions and units of the

symbols in those tables are listed below, and are consistent with IEC 60601-2-37 and IEC

62359. Denitions for CAPITALIZED parameters, if not found here, can be found in the

reference documents.

All table entries have been obtained at the operating conditions that give rise to the

Maximum Index Value (shown in the second row of the table). Due to the complexities of the

system user interface, it may be dicult to exactly replicate the declared condition. Contact

Samsung Medison for further information as needed.

Note that Samsung Medison provides information for both of the TIS non-scanned columns.

The ‘Aaprt≤1’ (cm

) column is an ‘at_surface’ TIS value and the ‘Aaprt>1’ (cm

) column is a

‘below surface’ TIS value. The tables will provide additional informational ags (‘**’) in the

event that the largest TIS non-scanned value is an ‘at_surface’ value with Aaprt > 1 cm

, or if

the largest TIS non-scanned value is a ‘below_surface’ value with Aaprt ≤ 1 cm2 case (very

rare).

aprt

the –12 dB OUTPUT BEAM AREA, or transmit aperture area, of the ultrasonic

beam. Derived from the –12 dB OUTPUT BEAM DIMENSIONS. (centimeters

squared)

at max. I

the EQUIVALENT BEAM DIAMETER at the point where the free -eld (non-attenu-

ated), PULSE INTENSITY INTEGRAL is a maximum (centimeters).

) the EQUIVALENT BEAM DIAMETER at axial distance zb. Equal to [ (4/п) (Pα (zb) /

Ita,α (zb))]0.5. (centimeters)

Dim of Aaprt the –12 dB OUTPUT BEAM DIMENSIONS. The active apertu-re dimensions in the

azimuthal and elevational directions (cent-imeters). For scanned modes, the

‘X_dim’ is the length of the entire scanned aperture.

awf

the ACOUSTIC WORKING FREQUENCY. Center frequency (megahertz)

Focal Length The nominal focal points, azimuthal (FLx) and elevational (FLy), for the operating

condition (centimeters).

pa,α

at max. MI the ATTENUATED PULSE-AVERAGE INTENSITY at the depth of reported MI,

zat_max_Ipi,α. (watts per square centimeter).

Ita, α (z) the ATTENUATED TEMPORAL-AVERAGE INTENSITY at axial distance z. (milliwatts

per square centimeter)

the displayed parameter representing potential cavitation bio-eects. (unit-less)

P the time-average ultrasonic OUTPUT POWER radiated by the transducer for the

transmit pattern (s) associated with the report-ed Index. For TIS_non_scan and

TIB_non_scan this is the total acoustic power of the non-scanned beam (s). For

TIC it is the total acoustic power of the contributing modes (which will be list-ed

separately, for the reader to sum). The reported maximum TIS_scan value may

(likely) come from a combinational mode. In this case, P = P1 + P1x1. P1 is the

BOUNDED OUTPUT POWER (the maximum power emitted from a one cm width

of the active (scanned) transmit aperture of the transducer in the scan plane

direction) of each the scanned transmit modes. For instance in 2D color mode

P1_2D and P1_Col will be listed. P1x1 is the ma-ximum contribution from any

one square centimeter of the non-scanned transmit mode (s) active aperture.

(milliwatts).

(z) the (ultrasonic) ATTENUATED OUTPUT POWER at axial dist-ance zs, for the non-

scanned modes or TRANSMIT PATTERNS. (milliwatts)

r,α

the ATTENUATED PEAK-RAREFACTIONAL ACOUSTIC PRESSURE associated with

the transmit pattern giving rise to the reported value of MI. (megapascals)

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