Computerized Axial Tomography

Computerized Axial Tomography equipment has 2 sections:

The gantry - The donut shaped structure with the table (where the patient lies) that extends into the donut hole. It houses the X-Ray source and an array of CCD cameras to capture the images. The images captured by the CCD cameras are transmitted to the base station through "Slip Rings" using high-speed (>2 GB/s) serial links.

Base station - The operator Console and display station where the pictures are analyzed. The base station communicates with the gantry electronics by high speed data communication over Slip rings. The gantry interface card enables communication between the base station and the gantry through a high-speed serial link.

Devices Used

• Power Manager
• ispPAC
• LatticeSC or ORT42G5

Functions Performed

• Digital interface to CCD
• Direct interface to Slip Ring

Lattice Advantages

• High performance SERDES for reliable communication over Slip Ring
• Reduced Board Space

Functions Performed

• Maintain the temperature of the CCD detector, constant

Lattice Advantages

• Quiet operation through Analog feedback control loop
• Digital Temperature setting
• Easy interface to H-Bridge