Evaluation: GE Healthcare Discovery IGS 740 Angiography System for Hybrid OR and Interventional Radiology/Vascular Applications

December 29, 2017 | Evaluations & Guidance


  • Angiography systems use x-rays to allow visualization of the vasculature to aid in the assessment of potential conditions and to provide guidance during interventional procedures. A hybrid OR is a surgical suite equipped with a dedicated imaging system, integrated patient table, and tableside controls to enable physician-controlled intraoperative imaging. Hybrid ORs can accommodate both minimally invasive and open surgical procedures. These suites typically include angiography, CT, and/or MR imaging equipment.
    • This type of room allows percutaneous procedures to be performed before, during, or after an open surgical procedure, without the need to move the patient from the OR table.
    • Clinical applications include vascular, cardiovascular, thoracic, spine, and neurologic procedures.
    • Procedures include endovascular aneurysm repair (EVAR), transcatheter aortic valve implantation or replacement (TAVI or TAVR), and peripheral vascular procedures.
    • The most common type of hybrid OR is an endovascular suite with an advanced angiography system.
  • The Discovery IGS 740 features a motorized and mobile automated guided vehicle (AGV). The C-arm is mounted on the AGV, which uses laser guidance to move on the floor around the surgical table to preset positions.
  • The Discovery IGS 740 is indicated for hybrid OR applications as well as for therapeutic and diagnostic interventional radiology/vascular applications. (We have rated the system separately for both applications.)
  • Major system components and capabilities:
    • Angiography system
      • X-ray generator: The system uses a 100 kW high-frequency Jedi generator.
      • X-ray tube: The Performix 160A is a water-cooled x-ray tube featuring three focal spot sizes. Focal spots are automatically selected during acquisition.
      • Collimator: Constructed of lead shutters (blades) and located on the x-ray tube housing, the collimator shapes the x-ray field to the patient's anatomy to reduce dose. The IGS 740 collimator includes four pairs of blades. In addition, copper filtration (0.1 mm, 0.2 mm, and 0.3 mm) and wedges are used to further modify the x-ray beam and reduce dose.
      • Detector: The Revolution detector is a 14-bit, 41 × 41 cm detector made from amorphous silicon. It produces a digital image readout. Four magnification options are available, ranging from the full field of view at 40 cm down to 16 cm.
      • Antiscatter grid: Mounted on the detector, the grid reduces the amount of scattered radiation that reaches the detector, improving image contrast. The IGS 740 includes a removable grid.
      • C-arm: The C-arm is a C-shaped assembly mounting the x-ray tube and detector. The wide-bore design has a maximum source-to-image distance (SID) of 129 cm.
      • Gantry/stand: The gantry is the structure to which the C-arm is mounted. For the IGS 740, the gantry is a freestanding motorized stand, or AGV.
        • The AGV uses laser guidance to follow virtual tracks along the ground, which are configured at installation. The AGV can stop at any arbitrary position along the tracks or be routed to preset positions.
        • There is a maximum of seven preset AGV positions around the patient table that are customized at installation. For each position, an additional back-out position can be configured to allow the gantry to be moved quickly out of the way in an emergency. The system is configured with two park positions that are used when the AGV is not needed.
        • Electrical cords and cables are bundled into a single sleeve that is routed from the top of the AGV to the ceiling.
        • The AGV itself is controlled using an interface at the back of the AGV stand.
      • Patient table: For interventional radiology/vascular applications, the Discovery IGS 740 has two patient table options:
        • The InnovaIQ table is height-adjustable and rotatable, with a tabletop that can move longitudinally and laterally and can tilt longitudinally.
    • Surgical display(s): The IGS 740 can be installed with two 48 cm (19 in) LCD monitors (one for live and one for reference imaging) or with one 148 cm (58 in) GE Large Display Monitor.
    • Exam room user interface: At the tableside, users can edit protocols for an unlimited number of system presets. Protocols can be labeled by the user and customized to change parameters like frame rate, focal spot size, and image processing options.

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