• Topic ID: id_11038987
  • Version: 2.0
  • Date: Jan 30, 2019 9:42:42 PM

X-Ray Theory Introduction

Jedi is the engineering name for a family of compact high frequency X-Ray generators. This generators family covers a wide range of applications from the mobile equipments RAD/RF up to this state of the art CT system.

  • JEDI 12-25KW: Mobile applications

  • JEDI 24-42KW: CT applications

  • JEDI 32-50KW: RAD applications

  • JEDI 50-65-80KW: RF applications

  • JEDI 100KW: VASCULAR applications

  • JEDI HP 100KW: CT applications

  • JEDI 60DC-53.2KW: CT applications

  • JEDI 60DC Lite-42kW : CT application

Jedi 60DC Lite is a High Voltage Generator for CT applications based on Jedi Platform, capable of operating at a peak power of 42KW. This generator is very closed to Jedi 60DC product.

1 JEDI Standard features

  • Family of 150kV generators operating from 12KW up to 100KW for all the major radiological, fluoroscopic and CT applications. The family handles 1ms to continuous exposures ranging from 0mA up to 1000mA

  • The generators feature the very latest technology available:

    • Constant potential independent of the line voltage variations

    • Power generation by a high-frequency converter (High voltage ripple: 40KHz-140KHz)

    • Distributed microprocessor controlled functions (CAN bus)

  • Single phase, three-phase or battery power source

  • Very low kV and mA ripple, excellent accuracies and dose reproducibility

  • Compatible with a wide range of tubes, high speed or low speed, supplies up to 3 different tubes. Thermal load interactive integrator ensuring optimum use of the heat protection curve of the x-ray tube

  • Declined in various packaging configurations: gantry, under-table, and cabinet

  • Serviceability: high reliability, fast installation ( no generator calibration ), application error codes reported ensure fast troubleshooting

  • Meets CE marking (and in particular EMC), IEC, UL, CSA, MHW regulations (if required)

  • Optional pulsed fluoroscopy

2 JEDI 60DC Lite Application

CT:

  • “CT” exposure mode, kV-mA- time

  • Variable mA scans

3 Architecture

Refer to Jedi generator functional architecture bloc diagram;

Figure 1. JEDI generator / JEDI 60DC Lite functional architecture

The Jedi family is composed of:

  1. a kernel:

    • High voltage chain composed of kV control, HV power inverter and HV tank

    • Anode rotation function

    • Tube filaments heater function

    • Control bus for communication between the functions

    • DC bus for power distribution to each function

    • Low voltage power supply

    • Application software, running on the kV control board

    These functions are the Jedi core. They are present in all versions of the generator.

  2. options depending on the application:

    • System CT Interface (CT-IF-V4 board in case of Jedi60DC and Lite)

    • CT Mechanical interfaces

    • EMC function (Pi Filter board)

  3. a packaging:

    The packaging architecture consists in a set of boxes which can be put together in several ways to make it fit either in a cabinet or a console foot or a table foot. The boxes can also be split in 2 or 3 units distant of several meters (example: CT gantry). In case of Jedi 60DC Lite, the boxes are split in 2 units: Power Unit and Auxiliary Unit, including following modules: