Equipment

The O-arm Surgical Imaging System

• 3-D, multi-plane fluoroscopic imaging capability, in addition to 2-D imaging.
• Two levels of 3-D image acquisition using a 512 x 512 x 192 reconstruction matrix:
  1. Standard definition 3-D imaging mode: Exposure time ~ 13 seconds, scan time taking 391 images over 360°
  2. High definition 3-D imaging mode: Exposure time ~ 26 seconds, scan time taking 750 images over 360°, with better contrast and spatial resolution.

• Lateral patient access without compromising mobility.
• Fast imaging with automated real-time and pre-set positioning (M2D).
• 2 K x 1.5 K digital flat-panel detector enables higher dynamic range and resolution.
• Automated multiplane imaging eliminates manual repositioning or need for a second system.
• System includes the O-arm Imaging Mobile View Station (MVS) stand with 30" digital monitor.
• DICOM 3.0 compliant: The system supports transfer of locally created images across the network to another system and can also save images to CD or DVD.
• The O-arm system interfaces with StealthStation navigation systems. This solution provides automatic data transfer of the patient’s 3-D data set, as well as the anterior-posterior and lateral fluoroscopy images. Automatic patient registration on the StealthStation navigation system eliminates the need for lengthy patient registration and allows the surgeon to navigate immediately after image acquisition and data transfer.

StealthStation S7 Surgical Navigation System

• Interfaces with multiple intraoperative imaging systems, including intraoperative magnetic resonance imaging, intraoperative computer tomography, C-arms and the O-arm
• Optical surgical navigation
• High-resolution, wide-screen monitor
• Many options to access preoperative exams via CD, USB and DICOM query/retrieve
• Product information sheet from Medtronic

StealthLink

Data available via StealthLink 1 include:

• Tool transforms for multiple tools
• Frame transforms
• Image space to frame space registration transforms
• Surgical plan target and entry points
• Registration exam information
• Working exam information (with merge transform to the registration exam)
• Microscope information
• Probe tip in image space
• Functional procedure specific information
• All transforms are float[4][4] and points are float[3]

StealthLink 2 application program interface supports a query/retrieve mechanism and contains a subscription mechanism for frequently updated data. The API consists of a C++ library and is available for Windows and Linux.

Data consist of data classes and methods to enable convenient access. All data will have an optional timestamp.

• Instrument
• Name, image space tip, transforms, marker information, status information, etc.
• Frame
• Registration
• Name, transforms, point sets, etc.
• Exam
• Image set, properties, merge transforms, etc.
• Planning information
• Surgical plans, segmented models
• Footswitch status, task information, localizer data

New PLUS toolkit includes a StealthLink/OpenIGTLink bridge for receiving live tool position information, planning image volume, registration results through StealthLink and sending it to Slicer through OpenIGTLink.