Stereotactic Dose Verification Phantom

Ion chamber and film dose measurements in a water-equivalent phantom designed specifically for stereotactic radiosurgery and recommended by Accuray.

Customizable Configurations

Standard configuration of the Stereotactic Dose Verification Phantom includes the Film Dosimetry and Ion Chamber Measurement slabs.

Film Dosimetry Measurements

Five water equivalent Blue Water slabs allow film to be positioned 2 mm apart for dose profile measurements of very small SRS targets. A cavity in each slab positions a 2.5 x 2.5 inch film in the exact center.

Ion Chamber Measurements

The 2 cm Blue Water ion chamber slab has an SDVP Plug with a cavity drilled to accommodate inter-changeable ion chamber plugs, and positions the detector in the exact center of the phantom to facilitate repositioning and fast, accurate measurements. 

SRS Dosimetric QA Slab

For rigorous testing and evaluation of imaging, treatment planning, and dose conformity.

The optional SRS Dosimetric QA Slab provides complex geometric targets to evaluate the imaging components of your treatment planning system. Five CT densities are available for a QA check of the CT density model.

SDVP Heterogeneity Insert

The optional SDVP Heterogeneity insert consists of two 5cm slabs, and a 2 cm chamber slab, each made of lung equivalent material.  The lung-equivalent assembly is placed between the Stereotactic Dose Verification Phantom Blue Water Slabs. The Heterogeneity Insert Plug with gold fiducial markers is designed to simulate a small tumor within the lung-equivalent material.

Use the Exradin W1 Scintillator or other detector to perform small field tests in a highly heterogeneous environment.  Included Extension Posts provide seamless integration with the Stereotactic Dose Verification Phantom for Monte Carlo dose verification.  

Specifications

Stereotactic Dose Verification Phantom
REF Number Main Phantom Components REF 91250 SRS Dosimetric QA Slab REF 70650
Main Phantom Components  
Blue Water 1.09 g/cm3
Black delrin alignment posts and thumbscrews 1.43 g/cm3
Nylon 6/6 flathead screws 1.14 g/cm3
Fiducial Dimensions

Gold Markers:  Ø0.8 x 5mm long

Lead BBs:  Ø1mm

SRS Dosimetric QA Slab  
Blue Water 1.09 g/cm3
Black C552 target shapes 1.76 g/cm3
Trabecular bone plug 1.20 g/cm3
Cortical bone plug 1.93 g/cm3
Adipose plug 0.94 g/cm3
Dimensions - Complete Phantom  
Height 10.00 cm (3.94 in)
Length 20.00 cm (7.87 in)
Width 20.00 cm (7.87 in)
Weight 4.4 kg (9.7 lbs)
Dimensions - Accessory slab only  
Height 2.00 cm (0.79 in)
Length 20.00 cm (7.87 in)
Width 20.00 cm (7.87 in)
Weight 0.9 kg (2.0 lbs)
Included Components  
  (1) Bottom slab with imbedded gold markers, lead BBs and integral alignment posts
  (1) Top slab with imbedded gold markers and lead BBs
  (1) 2.0 cm chamber slab with generic cavity hole
  (2) Ion chamber plugs (drilled for Exradin A19 and Exradin A16)
  (1) Solid ion chamber plug
  (2) 5.0 mm slabs
  (5) 2.0 mm slabs with recessed pockets to accept 2.500" x 2.500" film
  (2) Flathead nylon 6/6 screws
  (2) Black delrin thumbscrews
  (1) Flathead screwdriver

Videos

Small Field Dosimetry Using Exradin W1 and SDVP Heterogeneity Phantom

11.77 min

Support

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