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Extension / Obese Rings

To simulate obese patients these Extension Rings can be used with our standard Thorax, Cardio, Abdomen and Liver Phantoms.

Order-number: QRM-Extensionrings

download product data sheet: QRM-Extensionrings

QRM phantom QRM phantom QRM phantom

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Our extension (obese) rings are a good choice if you want to test the influences of higher attenuation due to an increased abdominal or chest girth on image quality in CT and other 3D imaging techniques.

The extension rings fits properly on our standard phantoms as there are the QRM-Thorax, QRM-Cardio-Phantom, QRM-Abdomen or the QRM-Liver Phantom.

The rings are basically produced of tissue equivalent material (valid for 120 kVp).

Optionally the rings can be made of fat or water equivalent material (valid for 80 - 140 kVp).

Other materials (specified CT-numbers HU) are available upon request.

Extensionrings are also available with drilled holes for dosimetry purposes.


Inner dimensions: 300 x 200 mm
Height: 100 mm (other measures upon request)
Extension Ring M: 350 x 250 mm
Extension Ring L: 400 x 300 mm
Extension Ring XL: 600 x 450 mm
(Inner dimensions: 400 x 300, fits on Ring L)
Base material: tissue equivalent (120 kVp)