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TheraPro Daily Output and Symmetry Monitor

TheraPro Daily Output and Symmetry Monitor
TheraPro Daily Output and Symmetry Monitor
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TheraPro Daily Output and Symmetry Monitor.


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TheraPro Daily Output and Symmetry Monitor.

The TheraPro is designed for daily output/symmetry/flatness/energy checks of radiation therapy treatment machines.  High quality, ease-of-use and versatility are the prime objectives in the TheraPro design.

• Consistency, flatness, symmetry and energy monitoring

• Five ion chamber array with sixth chamber for energy constancy

• Automatically corrects for temperature and pressure

• No electronics near beam

• Controller runs on Windows®

• Touch screen display (with optional mouse and keyboard included)

• 32 MB internal flash memory

• Includes 64 MB CompactFlash™ card and USB CompactFlash card reader for exporting data

• Flexible data transfer to any Windows application for charting, reporting, etc.

• Expandable to a five-channel diode dose monitor

A Windows®-based control panel digitally controls the instrument.  The TheraPro guides the user through setup, measurement and data management.  The user proceeds through measurement sequences easily by using either the touch screen interface or by clicking the mouse.  The TheraPro stores a virtually-unlimited number of calibrations and measurements.  Years of measurements can be stored on multiple machines using the internal 32 MB flash memory.  Stored beam information includes date, time, machine name, energy, chamber readings, flatness and symmetry.  Data files can be transferred via the supplied 64 MB CompactFlash™ card and USB card reader to standard spreadsheet or word processor applications.

When compared to similar devices, the TheraPro is unique because it is expandable.  With the optional Diode Dosimetry Software, diode input module and diode detectors, the TheraPro can be economically upgraded to perform as a five-channel diode dosimeter, with the same data collection and storage power as mentioned above.  As such, the TheraPro does not sit idle after the daily beam output checks are done.


Chamber Array
The chamber array contains six ion chambers that are automatically corrected for temperature and pressure.  One chamber is located in the center of the 20 cm x 20 cm field and four chambers are each located 8 cm off the central axis on the X and Y axes.  The signals are sent through a custom made, molded-jacket, shielded multi-coax cable to the Data Acquisition Module located inside the treatment room.  The sixth ion chamber, in a separate location, provides energy constancy information.

Data Acquisition Module
The data acquisition module contains a six-channel electrometer that sends data to the controller located outside the treatment room via inexpensive, readily available 49' (15 m) cable.  Longer cable lengths are available on request.

The controller provides control and data storage for the TheraPro.  This controller runs the TheraPro software under Windows® using either touch screen or keyboard & mouse for operation.  Data can be exported to standard spreadsheet and word processing programs for more extensive plotting, charting, and reporting of data.

Diode Dosimetry Software (optional)
The TheraPro can be used as a one-to-five channel dose verification monitor by using optional software and simply replacing the ion chamber array with a diode input module that accepts up to five diode detectors of either polarity.

TheraPro Daily Output and Symmetry Monitor Includes:
Chamber Array
Data Acquisition Module
64 MB CompactFlash™ Card
USB CompactFlash™ Card Reader
Acrylic Buildup Plates
Gantry Mounting Bracket
Interconnecting Cables

  Within 0.5% of reading
Detectors:  Six ion chambers, one on central axis, four chambers spaced at ±8cm off central axis on X-Y axes, one energy check chamber
Chamber size:  ~ 0.6 cc, 1.2 cm diameter
Buildup:  0.60 g/cm2 (0.481 acrylic + 0.084 polystyrene +0.035 Mylar®)
Range:  ~ 500 cGy (6 MV photons)
Rate Limitation:  1000 cGy/min
Deviation Limit:  User selected low and high alarm
Data Link:  15 m cable transmits data from the Data Acquisition Module to the controller
Data Storage:  32 MB internal flash memory. 64 MB CompactFlash™ and USB CompactFlash™ card reader for exporting data included.
Temp. Accuracy:  ±1°C
Pressure Accuracy:  ±1.5 mmHg
Power:  100-240 AC, 50-60 Hz, 2 A fuse
Chamber Array Size:  9.1" x 11.2" x 1.2" (23.1 x 28.5 x 3.0 cm)
Chamber Array Weight:  3.75 lb (1.7 kg)
Data Acquisition Module Size:  10" x 5.3" x 3.7" (25.4 x 13.5 x 9.5 cm)
Data Acquisition Module Weight: 3.1 lb (1.4 kg)
Controller Size:  8.2" x 8.2" x 5.8" (20.8 x 20.7 x 14.8 cm)
Controller Weight:  4 lb (1.8 kg)


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