Aloka ProSound Alpha 10, Service Manual, Page: 37 / 405

MN2-2008, Rev.2
SECTION 4
Principle of System Operation
4 - 4
Image Quality Adjustment
B Gain ~Ver.5 30~90dB (60/256 dB Step)
Ver.6.0~ 10~90dB (40/256 dB Step)
Possible on both real time and frozen image.
M Gain ±30dB (60/256 dB Step) from B Gain Settings
Possible on both real time and frozen image.
STC 8-level slide variable resistor (0, 1, 2, 3, 5, 8, 12, 18 cm)
* Provided as digital information from the operation
panel.
Ver.3~ Possible to record STC curve for each view durting the
Stress-mode.
Ver.7~ STC Memory (possible to keep the STC curve)
Contrast 16 steps (B, M independent, dB display)
23 steps, Selectable from contrast display (C1~C23) or
dynamic range display (D36~D96, dB)
Possible on both real time and frozen image.
~Ver.4.0 Changed dynamic range against black level.
Ver..4.1~ Changed dynamic range against middle brightness.
AGC 16 steps (B, M independent)
~Ver.3.0 “Relief” and “FTC” function integrate into “AGC”.
Ver.4.0~ “Relief” and “FTC” are independent of “AGC”
FTC (Ver.4.0~) On/Off
Relief (Ver.4.0~) OFF/Low/Mid/High
Frame Correlation 16 levels (Both B/W and Color)
Line Correlation 16 levels (Both B/W and Color)
Post Process 5 types (Linear/Slope1/Slope2/Slope3/Reject)
Gamma correction View Gamma: 5 types (Linear/A/B/C/D)
+ User table: 1 type (User)
Ver.4.1~ View Gamma: 9 types (Linear/A/B/C/D/E/F/G/H)
Scanning line density Variable in accordance with the diagnostic distance and
zoom settings.
Steered Beam Max. ±30º (5º steps, special probe only)
Max ±20º (5º steps) for B/W
Flow, Doppler and B/W independent
Image Frequency Select 4 types (High, Resolution, Standard, Penetration)
Image Process Select Various image quality adjustment change in the lump.
Adaptive Image Processing (Ver.6~)
Speckle noise reduction and Edge enhancement function
Ver.7~ possible to configure parameter mode independent
(the hardware and SOP-ALPHA10-24 are required
depending on S/N)
Edge Optimizer (Ver.6~) Speckle noise reduction and Edge enhancement function
(the hardware is required depending on S/N)
Image Optimizer (Ver.7~) Quick adjustment function for B-gain, STC and angle gain