XtremeCT II

The XtremeCT II is the new generation high resolution peripheral quantitative computed tomography (HR-pQCT).

The XtremeCT II is designed to measure the bone density and to quantify the threedimensional microarchitecture of the bone at the distal tibia and radius of humans for clinical in vivo assessment of osteoporosis at an even higher precision and speed than its predecessor, the XtremeCT.

A low X-ray dose allows regular follow-up measurements and powerful true-3D evaluation software automatically matches cortical and trabecular bone regions to previous measurements for direct comparison of density and structure characteristics.

Density Parameters

Structural Parameters

  • Cortical Density
  • Trabecular Density
  • Trabecular Thickness
  • Trabecular Separation
  • Trabecular Number
  • Volume Fraction
  • Cortical Thickness
  • Cortical porosity
  • Arterial calcification

For compatibility with the previous generation HR-pQCT, a XtremeCT I equivalent protocol is available.

A video provided by our customers at the Bone Imaging Laboratory in Calgary shows how the XtremeCT is used in practice. To watch the video follow this link.



XtremeCT II


High-resolution peripheral quantitative CT
No external shielding required

X-ray source

60 µm spot size
68 kVp, 100 W, cone beam


4608 x 400 elements


‹ 58 µm (10% MTF)
30 - 273 µm nominal isotropic (pixel size)

Image matrix

512 x 512 to 8192 x 8192 pix

Max. scan size

140 mm x 225 mm (ØxL)

Max. specimen size

170 mm* (Ø)**

Min. scan time

30 s


100 - 230 V / 50 - 60 Hz / 10A


144 x 142 x 96 cm (HxWxD)


570 kg

*Density calibration valid up to 140 mm

**Scanner is open-ended

Measuring method

Tibia measurement with cast (courtesy of: Charité, Berlin)
In vivo scan of distal radius at 60 µm.
Cortical porosity of radius.
Cortical porosity of tibia.

More example images...

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