Overview

The Explorer4D system facilitates optimal treatment planning by the surgeon and is easier to use than previously existing industry systems. It is compatible with both the RGS Vertex360 and the RGS Orbiter.

The Treatment Planning System is an interactive software package that runs on a Power Mac® G5 workstation. Its 3D rendering capability, enhanced with full 64-bit processing power, enables the user to define treatment quickly and accurately. This UNIX™-based Mac OS X system offers unprecedented reliability and security. The workstation adapts easily to existing radiology networks. With minimal training, any experienced neurosurgeon, medical physicist or radiation oncologist can easily operate the system.

Explorer 1

How It Works

The stereotactic frame and modality-specific indicator box are attached to the patient. Images are scanned using one or more imaging modalities. Images are transferred, using the DICOM protocol, to the Treatment Planning System (TPS). Fiducial markers within the indicator box appear on the images, ensuring accurate registration with the frame. The physician specifies the desired treatment volume directly on the 30″ LCD monitor, in both two and three-dimension, using a combination of all acquired imaging modalities.
Treatment planning consists of simply “dropping shots”—placing isocenters with chosen collimator sizes (4, 8, 14 or 18 mm), directly on the displayed images and monitoring isodose curves, which appear and update instantly. When the isodose curves and surfaces match the desired treatment, the physician assigns a treatment dose. Treatment time for each shot is immediately calculated.

Explorer 2

The Explorer4D Treatment Planning System includes quantitative statistical tools for evaluating the plan, such as DVH, cross-sectional dose distributions, point-dose calculations, etc. Once the plan is determined to be acceptable, a printout of shot positions, collimator sizes, weights and treatment times is generated. This same dataset is transferred immediately over local area network to the RGS Vertex360™ treatment console.

The implementation of the Explorer4D application is done via a proprietary plug-in to the open source DICOM workstation software OsiriX is an award-winning medical image application originally developed at UCLA.