Toshiba Aplio SSA-770A Service Manual page 128

No. 2D730-148E*O
(b) EP
This consists of one EP-ASK and a persistence memory. EP operates in 2D-mode
and M-mode and performs echo signal processing as outlined below.
l
Magnitude calculation
Power operations are performed for real and imaginary input data.
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Log compression
Log compression is performed for the echo signal.
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Blending
Combination focus and other vector combination operations are performed.
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Edge enhancement
Edge enhancement is performed for the echo signal.
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AGC
Feedback processing and echo enhancement are performed for the echo signal.
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Black hole and noise spike filtering
Noise appearing as black and white points is eliminated.
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Persistence
Frame correlation processing is performed.
(cl FP
This consists of one FP-ASIC, a buffer memory, two FPGAs, a filter coefficient
memory, and a persistence memory. FP operates in CDI mode and MCDI mode and
performs color Doppler processing.
l
Corner turning
Real and imaginary data input from the DR is stored in the buffer memory and the
data is rearranged when processing is performed by the MTI filter.
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Wall filtering
MTI filtering is performed. FIO, which reduces motion artifacts, is also pet-formed.
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Autocorrelation
Auto-correlation is performed.
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Spatial averaging
The filter to be used in spatial averaging (smoothing) is set
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