Components and Functions (Theory)
5-4 Invenia ABUS 2.0 – System Setup and Basic Service Manual
4700-0043-00 Rev. 4
ultrasound data to the PC Box through a PCI Express
connection.
The MFEPS power board gets input power from the PC Box's
ACDC assembly, and it outputs all the low voltages needed by
the cMST board. It supplies 12 VDC power for the U/S Box fans
and 5 VDC for the MCI board. The board's daughter board, the
MCI board, forwards the PC's motor control commands over
USB protocols to the Weight Tower and Scan Head. The
MFEPS also provides all voltage supplies needed to drive the
ultrasound transducer.
The MSPB Relay Board handles switching between the
ultrasound transducer in the Scan Head and any (future)
auxiliary transducer.
Scan Head
The Scan Head contains the ultrasound transducer and the
mechanism to mechanically scan the transducer sideways. The
Scan Head Control board receives high level commands from
the PC and performs the low-level local control to drive the scan
stepping motor to move a transducer across the breast to
acquire a sequence of 2D image slices that together represent a
volume of tissue. This controller also monitors user interface
activity at the Scan Head (the pushbuttons) and relays the
pushbutton states to the PC. It also operates an
electro-mechanically lockable Ball Joint fixing the scan head
position, when commanded to do so by the PC.
Weight Controller
The Weight Control board is located within the Weight Tower.
The board manages an electro-mechanical scan arm vertical
locking mechanism and an automatic Scan Head weighting
(compression) mechanism under command of the PC Box.
As mentioned before, the PC Box communicates with the
Weight Controller over a USB 2.0 link dedicated for that
purpose. This USB cable is routed to the Ultrasound Box where
the USB signals are routed alongside other signal lines in a
custom cable to the Weight Tower and Weight Controller board.
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