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4535 612 34161 HD3 Service Manual Page 58
CSIP Level 1 Theory of Operation: Introduction
4Theory of Operation
Introduction
This section provides a functional overview of the HD3 Ultrasound System by breaking down
the system into functional elements and describing their relationships and basic principles of
operation.
System
Architecture
The HD3 system architecture is made up of the following basic functional elements:
• Physical assemblies comprising the mobile cart and system components
• Electrical power functions
• Ultrasound signal generation and control functions
• Echo acquisition and control functions
• Signal and image data processing and analysis functions
• Image display and audio presentation functions
Operating
System
A Linux operating system (OS) provides an integrated range of resources: drivers and handlers
for storage, video, serial and parallel ports, and support of file system services and graphical user
interfaces. The OS is resident on the hard drive. The system software performs these tasks:
• Processes requests from the control panel
• Sets up beamforming parameters
• Processes acquired ultrasound echoes into digital visual representations for conversion into
analog signals
• Performs measurements and calculations on acquired data
• Stores acquired data (such as images and user-entered data) for subsequent retrieval