Features
- Measures the source strength with 4n geometry
- Accomodates the source inside the chamber volume
- Vented sensitive volume of 55 cm3
The SOURCECHECK ionization chamber is the ideal device for measuring the source strength of radioactive seeds, which are used in radiation therapy for permanent implantation into cancer tissue and of sources used in intravascular brachytherapy (IVB). It is specially designed to feature a full 4n geometry for high precision source strength measurements. An acrylic guide tube is located in the center of the chamber to accommodate the radioactive source to be measured. The SOURCECHECK chamber makes it possible to measure single seeds or seed trains of up to 130 mm
length. A wide guard ring reduces the influence of scattered radiation from the housing to improve the measuring accuracy. Since the sensitive volume is vented, air density corrections are required. For measurements, the SOURCECHECK chamber is connected to an electrometer like UNIDOS, UNIDOSwebline or UNIDOS E.
Specifications
| Type of product | vented flat ionization chamber |
|---|---|
| Application | source strength measurement of brachytherapy sources |
| Measuring quantities |
air kerma strength, apparent activity, exposure strength |
| Calibration | 125I, others upon request |
| Nominal sensitive volume | 55 cm3 |
| Design |
vented; 4π geometry |
| Reference point | center of longitudinal chamber axis |
| Chamber voltage | 400 V |
| Nominal response | 28.3 fA/MBq for 125I |
| Leakage current | ≤ 5 fA |
| Cable leakage | 10 pC/(Gy·cm) |
Materials and measures
| Guiding tube | PMMA, inner diameter 3.4 mm (minimum) |
|---|---|
| Outer dimensions |
width 220 mm depth 60 mm height 14 mm |
| Weight | 200 g |
Useful Ranges
| Temperature | (10 … 40) °C (50 … 104) °F |
|---|---|
| Humidity | (10 … 80) %, max 20 g/m3 |
| Air pressure | (700 … 1060) hPa |
Options
Adapters for single seeds
Adapters for strands
Applicator adapters for HDR afterloading sources
Adapter for NOVOSTE Beta-CathTM
Parts
TN34051 SOURCECHECK, connecting system BNT
TW34051 SOURCECHECK, connecting system TNC
TM34051 SOURCECHECK, connecting system M
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