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Reference Manual 99

Acoustic Power Tables

IEC 60601–2–37 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 cm

case (very

rare).

aprtt

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–

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

) the EQUIVALENT BEAM DIAMETER at axial distance z

. Equal to [(4/п)

) / I

))]

0.5

. (centimeters)

Dim of A

aprt

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 (FL

) and elevational (FL

), for the

operating condition. (centimeters).

pa, α

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

at_max_Ipi,

(watts per square centimeter).

(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 = P

+ P

1x1

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. P

1x1

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)

at max. I

the PEAK–RAREFACTIONAL ACOUSTIC PRESSURE at the point where the

free –eld (non–attenuated), PULSE INTENSITY INTEGRAL is a maximum

(megapascals).

prr the PULSE REPETITION RATE associated with the transmit pattern giving

rise to the reported value of MI (pulses per second).

PART 3. ACOUSTIC POWER TA BLES

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