Samsung SONOACE R3 Instrukcja Użytkownika Pobierz pdf (Strona 406)

Reference Manual 100

TIB the BONE THERMAL INDEX for applications, such as fetal (second and

third trimester) or neonatal cephalic (through the fontanelle), in which

the ultrasound beam passes through soft tissue and a focal region is in

the immediate vicinity of bone. (unit–less)

TIC the CRANIAL BONE THERMAL INDEX.

Sscan

the SOFT TISSUE THERMAL INDEX in a scanning mode. (unit–less)

TIS

non–scan

the SOFT TISSUE THERMAL INDEX in a non–auto scanning mode. (unit–

less)

the PULSE DURATION associated with the TRANSMIT PATTERN giving rise

to the reported value of MI. (microseconds)

_at_max_Ipi,

the axial distance from the transducer where the ATTENUATED PULSE

INTENSITY INTEGRAL Ipi,

is maximum.

the distance where TIB_non–scan is determined. For non–scanned modes,

Distance along the beam axis to the plane where the product of the

ATTENUATED OUTPUT POWER and ATTENUATED TEMPORAL–AVERAGE

INTENSITY (P

(z) x I

ta, α

(z)) maximizes. (centimeters)

value equal to 1.5 times the EQUIVALENT APERTURE DIAMETER (D

). Also

equals 1.69 * (centimeters)

the distance where TIS_non–scan is determined. The axial distance

corresponding to the location of max[min(P

(z), I

ta, α

(z)x1 cm

)], where z >=

. (centimeters)

Explanatory Notes

(a) This index is not required to this operating mode.

(b) This probe is not intended for adult transcranial uses.

(d) The maximum index value is less than 1.0

* If the MI comes from a scanning mode Transmit Pattern (pulse), the ‘prr’ listed is

the average per second for the ‘worst case’ scan line. ‘prr’ for scanning modes is the

product of the frame rate and the number of pulse per line of the Transmit Pattern .

** The max TIS unscanned value is an ‘at_surface’ value and occurs for aperture > 1.0

cm^2, OR The max TIS unscanned value is a ‘below_surface’ value and occurs for

aperture <= 1.0 cm^2.

+ The max TIB for this combinational mode = the at_surface TIS_scanned value. The

non–scanned_TIB value indicated is the below_surface max. A “+” is used when the

TIB value is less than the TIS_scanned value for the operating condition.

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