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FAQ - Waterphantom

The waterphantom uses finite precision step stepping motors, where the number of digital impulses corresponds directly to the travel distance.

Mechanical resolution is 0.1mm increment while the electronic increment is 0.005mm. The repeatability is 0.2mm absolute, long term. After a warm up, repeatability during an eight hour period is 0.1mm or better.

In addition to the stepping motors, an independent high resolution potentiometric measurement circuit exists to verify the actual performance of the direct positioning drive.

Specially designed miniature stainless steel cables with a nylon coating are used for positioning to avoid mechanical hysteresis or play in detector position and to provide tight, but smooth motion during scanning.

No. The waterphantom needs only a calibration after the first installation and/or after changes to the hardware. The user should only verify from time to time that the calibration is still ok.

No. The Waterphantom is designed to provide trouble free operation over prolonged periods with no maintenance. However, to achieve this performance, it will be necessary to keep the instrument clean, and periodically check the alignment/calibration of the unit to detect abuses or accidental mishandling of this precision instrument.

No. All parts are either permanently lubricated or of low-friction coefficient material.

FAQ - Software

No. The RTD-Software saves the raw data automatically in the chosen site folder.

No. As soon as the user makes any changes to the raw data while in RTD-Analysis the software creates a copy of the raw data and changes only this file. The raw data remains untouched and cannot be overwritten by accident.

The RTD software uses acquisition plans to define what the user wants to measure. The build in Acquisition Plan Wizard guides through eight easy steps in which the user can choose between different study types, field shapes and other parameters.

No. Once an acquisition plan is created and the study type and geometry for the new measurement do not change it can be used again and again. The plan is also no bound to a specific machine.

Yes. With the Acquisition Plan Editor the user can easily make fast changes to for example the energy, data point spacing, the field geometry and scan depth.

Yes. There are Datalink Export expansions available for: Cyberknife, Eclipse, Iplan, Oncentra, Pinnacle3, Precise, Prowess, RTSuite and XiO.

FAQ - Electrometer

Not at all. The Electrometer for Real Time Dosimetry is software controlled. The digital attenuation control for adjusting the signal and reference values are embedded in the RTD Scanning Software. The user can also use the “Auto Set” function to automatically set the attenuation levels.

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