BSD-2000/3D Hyperthermia System
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Twenty-four dipole radiators of the Sigma Eye maximize the 3D energy convergence at the targeted treatment location. Dynamic 3D control and steering of the heating pattern size, shape, depth and position. State-of-the-art computer treatment planning including a 3D CT patient data interface. QA software, techniques and equipment to ensure accuracy of RF power and phase calibration.
3D hyperthermia allows for optimum results, since the heating zone is targeted specifically at the tumor region. This is achieved by focusing the electromagnetic power onto the target volume. The focus is not fixed at the center of the applicator but may be targeted at any specific area, providing the system operator with significantly more freedom in positioning the applicator's heating region. The BSD 2000/3D hyperthermia system is designed particularly for treating tumors in hard-to-reach locations.
To begin with, part of the patient's body is enclosed by an eye-shaped applicator. Phase and amplitude steering can be used to create the heating focus within the applicator. The 3D technology makes use of 24 dipole antennas of the Sigma Eye driven by 12 RF power channels. These dipoles are arranged in three rings of eight antennas each. By varying the phase and amplitude of each of the 12 input channels, the operator creates a constructive interference at the tumor zone. The optional treatment-planning software, HyperPlan, calculates the best possible settings for each channel. Internal treatment planning software also serves as an educational guide for tissue equivalent elliptical phantoms.
The Sigma Treatment Base Unit includes both patient and applicator support systems. The patient support system consists of two fiberglass rods that support a sling, which is connected in turn to the hydraulic lift assembly, located at both ends of the patient support system. The patient is placed on the sling in preparation for the therapy, then the applicator is positioned over the tumor area and the water bolus filled. A large water reservoir mounted in the base unit maintains the bolus water at the desired temperature throughout the treatment.
The entire BSD 2000/3D hyperthermia system is controlled by a PC, running under Windows® XP Embedded, interfaced to all system modules. A large, user-friendly LCD color monitor, cordless keyboard and cordless mouse create an ergonomic operating environment. The system also includes a high-resolution color inkjet printer for instant hardcopy treatment reports. The system software incorporates a color Graphic User Interface, automatically guiding the operator through the set-up and treatment procedures and featuring menu-driven selection of treatment parameters.
HyperPlan, an optional software program, has been developed to provide customized pretreatment planning to optimize the procedures for each patient and individual tumor type. HyperPlan was developed by the Konrad-Zuse-Institute and the Charit頕niversity Hospital in Berlin. The software, designed especially for 3D hyperthermia treatment planning, uses patient CT and/or MRI data to determine the optimum settings for each specific patient. These data are divided according to tissue type - bones, muscle, fat, tumor - and once the appropriate applicator for treatment has been selected, the electrical field distribution is calculated using Maxwell's equations. The optimization module allows field maximums that conform precisely to the tumor region. The system provides recommendations for the most suitable settings for both amplitudes and phases. The temperature distribution can also be predicted based upon various blood flow assumptions for each tissue region.
The BSD 2000/3D and the BSD 2000/3D/MR are not approved by the FDA for any kind of use within the United States.
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