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p(x)<br />
d<br />
1/2<br />
=<br />
Snov<br />
kri<br />
mišice<br />
kosti<br />
p<br />
0<br />
ln 2<br />
=<br />
α<br />
voda (20˚C)<br />
maščoba<br />
mehko tkivo<br />
ABSORBCIJA UZ VALOVANJA<br />
e<br />
-αx<br />
Oslabitveni (absorpcijski)<br />
koeficient pri 1MHz [dBcm -1 ]<br />
0,2<br />
60<br />
20<br />
150<br />
1000<br />
70<br />
Hitrost valovanja<br />
c [m/s]<br />
1492<br />
1450<br />
1530<br />
1545 - 1630<br />
2700 - 4100<br />
1540
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