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MUDULATION TRANSFER FACTOR (MTF)
195.True regarding MTF is/are
a.describe the ability of imaging system to reproduce the
information
b.an MTF of 0 (zero) is a perfect system
c.MTF of focal spot
increases with magnification used
d. intensifying screen MTF decreases with magnification
e.magnification reduces the frequency of information to
be resolved
ANSWER IN THE NEXT BLOG
POST YOUR ANSWER BELOW IN THE COMMENT
USG -----MATCHING LAYER
a)It is used in front of transducer
b) Improve transmission of ultrasound from transducer to
patient and not vice-versa
c) The thickness of matching layer must be equal to half of
ultrasound wavelength in the matching layer
d)Impedance of matching layer must be similar to that of
soft tissue
e)Made of mixture of aluminium powder and epoxy resin
ANS abe
The thickness of matching layer must be equal to quarter of
ultrasound wavelength in the matching layer. Impedance of
matching layer must be about mean of the impedances on
each side of matching layer ( crystal and soft tissue) .
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