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XRV-100

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Features and Benefits

- Robot, MLC, and LINAC Quality Assurance

- Real-Time Beam Capture

- 3D Beam Vector and Profile Measurements

- Proton Beam Compatible

- Saves Time and Reduces Costs

- CT Scanner Compatible Detector Phantom

- Fast Update Any-Viewpoint Display of Beam Vectors and Profiles

- GUI or Automated Measurements

- Quick Data Export to Spreadsheets and Graphing Software

- Flexible Script Driven Environment

- Setup and Training Included

3D Beam Profile Viewing

The XRV family of X-ray and proton beam inspection systems combines precision metrology with high-energy radiation detection to form a completely electronic alternative to film-based measurements. The XYZ location and vector of pencil-thin beams of radiation can now be measured with unmatched speed and accuracy. Beam vector, profile and divergence can be obtained in seconds rather than hours. Automation scripts can be used to record changes in the beam shape, intensity, location, and direction over time for use in later analysis or 3D volumetric reconstruction.

XRV systems verify that the stereotactic radiosurgery subsystems (robot, collimator, linear accelerator, and kV imagers) are working together to accurately deliver radiation to the irregularly shaped lesion volume. The correct operation of mechanical leaf collimators used in these systems can be quickly verified before or after treatment. Beam measurements are accurate to .2 mm and measurement repeatability is typically .02 mm. Vector and beam viewing software enables real-time any-angle viewing of the captured data.

All operations are controlled by a laptop or desktop PC supplied with the detector phantom. The XRV comes standard with a 3 - 30 meter (100 feet maximum) USB cable system so the system PC and operator can be located safely away from the treatment room. The detector phantom weighs approximately 8 kilograms (17 pounds).

 

XRV Operation

The XRV phantom is first imaged with a CT scanner so that the fiducials may be used to establish the treatment dose volume. Every beam of the treatment plan can then be measured for delivery accuracy. The patented XRV technology works on the principle of the hodoscope: the X-ray or proton beam creates entry and exit beam spots on the surface of a scintillator cone located within the phantom. A sensitive CCD camera digitizes the beam spots and transfers the bitmap to the XRV computer for reconstruction into a 3D vector and profile.

The BeamWorks software application is used to acquire, analyze, and archive XRV images. Beam vector and shape data are displayed in 3D allowing real-time zoom and viewing angle selection. Beam diameters can be measured at any vertical slice of the beam for easy penumbra calculations. Spreadsheet macros are provided for extended statistical analysis of the captured data. Measurements can be made from the GUI or customized with an easy-to-use scripting environment.

Shown above is a representation of X-ray beams striking the XRV-100 scintillator cone from various angles. Once the entrance and exit spots for each beam are measured, the 3D path can be precisely calculated and displayed in the Vector Viewer application below.

XRV-100 Specifications:

Accuracy:1

XYZ Beam Center:

+-.2 mm

Repeatability:

+- .02 mm

Vector Theta/Phi:

+- .2 degrees

Repeatability:

+-.05 degrees (typical)

Optical System:1

Resolution:

1280 x 960 pixels binned to 640x480

Capture Rate:

6-10 frames/sec (typical)

Lens MTF:

Megapixel resolution

Cone Angle:

60 degrees

Usable Cone Area:

60-120 mm from apex

Camera Interface:

USB

Camera Shielding:2

Camera Top:

12.7 mm lead alloy

Camera Sides:

12.7 mm lead alloy

CCD Lifetime:

~1,500 beam hours

Camera Module Physical:

H x W x D:

26.6 x 19.1 x 58.4 cm

Weight:

7.8 kg (17.2 lbs)

Enclosure Material:

Aluminum and Plastic

Interface:

Capture Trigger:

GUI, Script, I/O, or Network watch-file

Computer Components:

Computer:

HP laptop or
selectable desktop configuration

Misc:

USB to Cat-5 extension cable,
Pelican Case, Windows 7 OS, USB dongle license

General:

Electrical Power:

110-220V, 2 or 4A

Environment:

5 to 30 deg C,
90% humidity, no condensation,
Minimal vibration

NOTES

1. Contact us for higher camera resolutions.
2. Estimated. Contact us for for custom shielding requirements, camera replacement and recalibration costs.