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  Digital X Ray

Introduction to Digital X-Ray:

PARTS OF A DIGITAL X-RAY MACHINE:

The digital X-Ray machine contains an X-Ray tube and driver to source X-Ray. The X-Ray passes by the body of the patient and the digital camera (situated on another side of the patient) takes the resulting image. The main base station manages the X-Ray tube, analyzes the image and shows the image on the CRT.

DIGITALCAMERA:

The received image is converted by the digital camera into digital signal and transfers the digitized image to the base station by a fibre optic link.

Main Base Station

The jobs of the main base station are as follows:

A. Drive and control the X-Ray tube

B. Communicate with the digital camera system by Fibre

C. Store the pictures on the hard disk for image retrieval and processing

D. Interface to an operator console for overall system control and image manipulation

E. Analyze and improve the image stored on the hard disk and display the emproved X-Ray image on a CRT monitor

Lattice Sc

 

ispPAC

FPGA

CPLD

Power Manager

973_Digital Camera Homework Help.jpg

Figure: Block Diagram of Digital X-ray

DEVICES USED

1. Lattice SC or ORT42G5

2. FPGA

3. Power Manager

4. isp PAC

5. CPLD

There Are Two Types of Functions Performed

1. Digital interface to CCD

2. Direct interface to Laser module

LATTICE SC

There Are Four Types of Lattice Advantages

1.  Reduced Board Space

2.  CML interfaces directly to most Laser Modules

3. Reduced time to market

4. High performance SERDES for increased system reliability

Isp PAC

There Are Two Types of Functions Performed

1.  Keep the temperature of the CCD detector

2.  Automatic Laser power control

3.  Laser diode end-of-life flag

There Are five Types of Lattice Advantages

1.  Quiet operation through Analog feedback control loop

2. Digital Temperature setting

3. Easy interface to H-Bridge

4. Compensate for Laser - Diode to Diode parametric variation

5.  Quiet operation due to Analog feedback control

FPGA

There Are three Types of Functions Performed

1. Customizable DSP FIR and IIR Filter

2.  Interface to ADC

3. Glue Logic: FIFO, Memory Interface, etc.

There Are six Types of Lattice Advantages

1. Easy customization of Algorithm

2. High speed FPGA fabric for various glue logic

3. High speed buffer management

4. Multiple high performance MAC (Multiply & Accumulate primitive)

5. Increase DSP throughput

6. On-Chip PLL for timing control and pipelining

CPLD

There Are three Types of Functions Performed

1.  CPU bus interface state machines

2.  Multi-port memory interface for ORT42G5, Co-processor FPGA, and CPU

3.  SDRAM interface

There Are three Types of Lattice Advantages

1. Enhances performance of DSP CPU operation with no wait states

 2.  Multi-port SDRAM drive with no performance degradation

3.  FIFO for mixing and matching the processing and data transfer rates

There Are one Types of Functions Performed

1.  Implements all the power supply management for that Port Card

There Are three Types of Lattice Advantages

1.  Reduced board space

2.  Increased reliability

3.  Reduced time to market

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