ISORAD® Diode Detectors

Item #

Energy

Output

Color

Build-up (g/cm2)

Build-up Material

*Axial Response 1
0° ~ 360°

**Axial Response 1
-60° ~ 60°

**Transverse
Response
-30° ~ 30°

Energy Used
for directional
response

Dia
(mm)

322-162

1-4 MV

-

Blue

1.4

Brass

99.5%~100.5%

99.5%~101.0%

97.5%~102.0%

Co-60

9.7 mm

322-163

6-12 MV

-

Yellow

1.6

Molybolenum

99.5%~100.5%

100.0%~101.0%

99.0%~100.5%

6 MV

9.7 mm

322-164

15-25 MV

-

Red

2.6

Tungsten

99.5%~100.5%

99.5%~100.0%

99.5%~104.0%

18 MV

9.7 mm

322-166

1-4 MV

+

Blue

1.4

Brass

99.5%~100.5%

99.5%~101.0%

97.5%~102.0%

Co-60

9.7 mm

322-167

6-12 MV

+

Yellow

1.6

Molybolenum

99.5%~100.5%

100.0%~101.0%

99.0%~100.5%

6 MV

9.7 mm

322-168

15-25 MV

+

Red

2.6

Tungsten

99.5%~100.5%

99.5%~100.0%

99.5%~104.0%

18 MV

9.7 mm

Features
• Radiation hardened silicon diode
• Active dimension of 1.4 mm in diameter
• 27 nC/Gy sensitivity
• 3m cable length
• LEMO cable connector

As the only cylindrical diode for in-vivo dosimetry, the design of the ISORAD was chosen because the axial directional response offers near zero angular dependence. The unique isotropic design makes it an ideal choice for tangential beams where it is difficult to predict angle of incidence, for a variety of dosimetry tests in air, or in phantom.

The ISORAD is available in three photon energy range models. Each model uses a different build-up material optimized to measure the dose near dmax. Offering built-in buildup eliminates the ned to add buildup separately.

Clinical Characteristics

Superior Radiation Resistance - the radiation degradationj rate is 1% per kGy at 10 MeV and less than 0.5% per kGy at 6 MV.

Minimized Instantaneous Dose Rate Dependence - When normalized to 100 cm SSD, the diode response variation is less than ± 1% for 6 and 18 MV from 80 cm to 130 cm.

Reproducible - ISORAD reproducibility error is less than 0.5% for measurements > 1cGy.

Specifications

Detector Diameter: 9.7 mm
Cable Connector: Lemo

NOTE: There is no electron detector in this series.
       These detectors are not waterproof.

Radiation Products Design, Inc.         www.rpdinc.com           sales@rpdinc.com
 763-497-2071   Fax 763-497-2295   5218 Barthel Industrial Drive Albertville, MN 55301
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