IIMRT Phantom Accessories

Phantom Benefits
•  Verify heterogeneity corrections
•  Correlate CTU to electron density
•  Check dose distributions in sensitive areas
•  2D and 3D isodoses
•  Verify individual patient treatment plans
•  Calibrate film with ion chamber

The IMRT phantoms are designed to address the complex issues surrounding commissioning and comparison of treatment planning systems and verification of individual patient plans and delivery.

These IMRT phantoms are manufactured from tissue equivalent materials that mimics water, bone and lung within 1% from 50 KeV to 25 MeV. The elliptical shape minimizes the CT artifacts associated with cubic phantoms and properly represents human anatomy in size and proportion. The uniformity of shape enhances accuracy of the depth measurements.  An interchangeable rod design allows the phantom to accommodate a multitude of dose measurement devices such as ion chambers, TLD, diodes and MOSFETs allowing for point dose measurements in multiple planes within the phantom.   The phantoms accommodate GafChromic® or standard ready-pack films. (1) Laser alignment markers and special radiopaque fiducials allow for easy CT to film registration.

Ratios of IMRT Phantom Material (2)(3)
Linear attenuation coefficients to reference tissues

IMRT PHANTOMS
Complete QA from CT Imaging to Dose Verification

Ratios of IMRT Phantom Material (2)(3)     Linear attenuation coefficients to reference tissues


En, MeV

Plastic Water-DT to H2O Ratio, %

Average Bone
to Ref1 Ratio, %

Lung (inhale)
to Ref2 Ratio, %

0.05
0.06
0.08
0.10
0.15
0.20
0.40
0.60
0.80
1.00
1.50
2.00
4.00
6.00
8.00
10.0
15.0
20.0
El. density
density

100.8
100.5
100.3
100.2
100.1
100.1
100.1
100.1
100.1
100.1
100.1
100.1
100.0
99.8
99.7
99.6
99.2
99.1
100.1
1.039 g/cm3

100.00
99.96
99.91
99.88
99.86
99.84
99.84
99.83
99.84
99.83
99.84
99.84
99.87
99.93
99.95
100.03
100.06
100.13
99.83
1.60 g/cm3

100.3
101.1
101.9
102.2
102.5
102.5
102.7
102.6
102.7
102.7
102.7
102.6
102.1
101.6
101.2
100.7
100.0
102.7
102.7
0.21 g/cm3

1. The CIRS line of IMRT phantoms is compatible with the RIT 113 Software for film to plan analysis.
2. ICRP 23, Report of the Task Group on Reference Man (1975).
3. Woodard, H.Q., White, D.R., The Composition of Body Tissues, The British Journal of Radiology (1986) 59; 1209-1219.

Radiation Products Design, Inc                 www.rpdinc.com                     sales@rpdinc.com
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