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XRV-100

XRV-124

XRV-2020A

XRV-2000

XRV-4000

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Features and Benefits

- Real-time Proton and X-ray 3D beam vector and profile capture over 360 degrees of rotation

- 140 mm long field of view

- 6 – 60 mm beam width metrology

- Filmless Winston-Lutz delivery accuracy analysis

- Fast star pattern gantry wobble analysis

- MLC sliding window analysis

- Captures VMAT deliveries up to 6 minutes long at 10 fps

- VolumeWorks XL reconstructs 3D accumulated fluence volumes 10 x 10 x 15 cm

- Automatic beam detection (no cables to the treatment system)

- BeamWorks software includes trend analysis and graphing of distance to plan, beam intensity, and beam dimensions

3D Beam Profile Viewing

The XRV family of X-ray and proton beam inspection systems combine precision metrology with high-energy radiation detection to form a completely electronic alternative to film-based measure-ments. The XYZ location and vector of pencil-thin beams of ionizing 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 proton and X-ray therapy subsystems (robot, collimator, radiation source, and kV imagers) are working together to accurately deliver radiation to the irregularly shaped lesion volume. Beam position measurements are accurate to .3 mm and measurement repeatability is typically .04 mm. Vector and beam viewing software enables real-time any-angle viewing of the captured data. Up to 4,000 frames of video can be captured real-time at rates up to 30 frames per second.

 

XRV Operation

The XRV phantom is first imaged with a CT scanner so that the fiducials establish the treatment dose position during delivery. 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 visible beam spots on the surface of the scintillator imaging cone at the front of the phantom. A sensitive CCD camera then digitizes the beam spots and transfers the bitmap to the XRV computer for computation into 3D vector and profile data.

 

The BeamWorks software is used to acquire, analyze, and archive XRV images. Beam vector and shape data are displayed in 3D using advanced GPU enabled algorithms. BeamWorks Delta allows two treatment plan captures to be compared beam-by-beam. VolumeWorks XL uses the captured vector and profile data to approximate the 3D treatment volume. Vectors and voxels are displayed together to represent volumes up to 10x10x15 cm.

Shown above is a representation of X-ray beams striking the XRV-124 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-124 Specifications:

Accuracy:1

XYZ Beam Center:

+-.3 mm

Repeatability:

+- .04 mm

Vector Theta/Phi:

+- .4 degree

Repeatability:

+-.2 degree (typical)

Optical System:1

Resolution:

1280 x 960 pixels binned to 640x480

Capture Rate:

20 frames/sec (typical)

Lens MTF:

Megapixel resolution

Cone Angle:

45 degrees

Usable Cone Area:

140 mm over 360 degrees

Width: 30 to 60 mm

Camera Interface:

USB

Camera Shielding:2

Camera Top:

12.7 mm lead or bismuth

Camera Sides:

12.7 mm lead or bismuth

CCD Lifetime:

~1,500 X-ray beam hours

Camera Module Physical:

H x W x D:

27 x 19 x 67 cm

Weight:

7.8 kg (17.2 lbs)

Enclosure Material:

Aluminum and Plastic

Interface:

Capture Trigger:

Auto, GUI, Script, or Network watch-file

Computer Components:

Computer:

Laptop with 17 inch display or
selectable desktop configuration

Misc:

USB to Cat-6 extension cable,
Pelican Case, Windows OS, USB dongle license

General:

Electrical Power:

110-220V, 2 or 4A

Environment:

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

NOTES - Contact us for external shielding option. The  camera may be replaced for a service fee after approximately 3 years if necessary.