Medical Applications User Guide (pdf) - Freescale Semiconductor

The depth in color used in the final image runs
from 0 to 255 where 0 represents the brightest
point and 255 represents the darkest. The
output image from the MSC8156 DSP is
stored in the DDR0 memory.
The MSC8156 DSP is used throughout the
document because the library adapts perfectly
to it. This library is suitable to develop
embedded software for the MSC8156 DSP
which involves working with a beamforming
signal or grayscale output images. Knowledge
in CW IDE and C programming language
is necessary.
The library uses different algorithms to
generate the final output image:
• FIR filter
• Envelope detection
• Log compression
• Histogram equalization
• Speckle noise reduction
• Scan conversion
Key target applications:
• Digital stethoscope
• Medical ultrasonography
• Ultrasonic lithotripsy
Ultrasound Software Library
Reference Design
For more information on how to use the
Ultrasound Software Library, download
Ultrasound Software Library (document
MEDIMGLIBUG) from the Freescale website.
18.9
Microprocessors
MPC5121e
The Freescale MPC5121e integrated
processor uses an e300 CPU core based on
Power Architecture technology. It provides
an exceptional computing platform for
multimedia and is excellent for embedded
solutions with a graphical user interface and
network connectivity.
Figure 17-6: 18-6: Control System Block Block Diagram Diagram
In
To display the processed images received by
the ultrasound probe, this processor includes
the following:
• MBX Lite 2-D/3-D graphics engine licensed
from Imagination Technologies Group Plc.
Includes PowerVR ® geometry processing
acceleration.
• Integrated display controller with support
for a wide variety of TFT LCD displays with
resolution up to 1280 × 720 at a maximum
refresh rate of 60 Hz and a color depth up
to 24 bits per pixel.
Variable Gain
Amplifier
Extracted
Output Signal
Medical Imaging
Figure 18-7: Concentrated Enegry Diagram of a Beanformer
Figure 17-7: Concentrated Energy Diagram of a Beamformer
X
Key Features
• e300 core built on Power Architecture
technology
• Up to 400 MHz performance and 760 MIPS
• AXE, a 32-bit RISC audio accelerator
engine
• PowerVR MBX Lite 2-D/3-D graphics
engine (not included in the MPC5123)
• DIU integrated display controller supports
up to XGA resolution
• 12 programmable serial controllers (PSC)
freescale .com/medical 97
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