CT Chamber PTW 30009

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CT Chamber PTW 30009.

The CT chamber is a vented cylinder chamber designed for dose length product and dose length product rate measurements in computed tomography.  The chamber allows the determination of the CTDI₁₀₀¹, CTDI_W² and CTDI_Vol³ according to IEC 61223-2-6 and IEC 61223-3-5.

• Pencil type chamber for measurements within a CT head or body phantom or free in air

• Provides a sensitive measuring length of 10 cm

• Shows a homogeneous response over the whole chamber length

Specifications
Type of Product:  vented pencil type chamber
Application:  dosimetry in computed tomography
Measuring Quantity:  air kerma length product, exposure length product
Reference Radiation Quality:  120 kV, HVL 8.4 mm Al (RQT9)
Nominal Sensitive Volume:  3.14 cm³
Design:  not waterproof, vented, pencil type
Reference Point:  chamber center
Direction of Incidence:  radial
Nominal Response:  14 nC/(Gy ··cm)
Chamber Voltage:  -100 V nominal, ± 500 V maximal high voltage to be connected only with active current-limiting device (Imax< 0.5 mA)
Energy Response:  < ± 5 % for 70 - 150 kV
Leakage Current:  < ± 10 fA
Cable Leakage:  < 1pC/(Gy ··cm)

Materials and Measures
Wall Material:  1 mm PMMA, graphite coated
Wall Area Density:  119 mg/cm²
Dimension of Sensitive Volume:  radius 3.5 mm, length 100 mm
Electrode:  Al tube, graphite outer diameter 3 mm

Ion Collection Efficiency at Nominal Voltage: 
Ion collection time:  274 µs
Max. dose rate for > 95.0 % saturation:  12.4 Gy/s
Max. dose per pulse for > 95.0 % saturation:  2.26 mGy

Useful ranges
Chamber Voltage:  ± 100 - 400 V
Radiation Quality:  50 - 150 kV electrons
Temperature:  10° to 40° C, 50° to 104°F
Humidity:  10 to 80 %, max 20 g/m³
Air pressure:  700 - 1060 hPa

¹CTDI₁₀₀ = Computed Tomography Dose Index 100
²CTDI_W  = Weighted CTDI₁₀₀

³CTDI_Vol = Volume CTDI_W

Note: This PTW CT chamber is designed to fit into PTW CTDI Phantoms specifically, and may not fit perfectly into third-party CTDI phantoms.

 Please specify which connection end is needed