Neurology clinical case

Haemorrhagic transformation or simple extravasation of the iodine injected during the procedure?

Testimonial by Dr. Savatovsky
Radiologist at FO Adolphe de Rothschild (Paris - 75)

Clinical case

Patient history

  • Right sylvian ischemic stroke 
  • Treatment at H4 by thrombectomy


  • Helical GSI
  • Head – medium
  • Collimation: 20 mm
  • Rotational speed: 0.8 sec/rot
  • Helical pitch: 0.531
  • Slice thickness: 1.25 mm
  • CTDI: 47.8 mGy
  • DLP: 884.3 mGy-cm

GSI Data Management

Acquisition console

  • GSI Data file Reconstruction
  • Reconstruction at 65 keV
  • MD Water(iodine) Reconstruction

Post-processing console

  • GSI Volume Viewer
  • Display at 65 keV
  • GSI MSI Mode: VNC (virtual non-contrast)


Clinical benefit

Spectral imaging makes it possible to differentiate a true haemorrhagic transformation from a transient extravasation of the contrast medium injected during the arteriography in the context of a stroke. This differentiation is fundamental in guiding the subsequent preventive treatment and, for example, in not having an anticoagulant treatment be contra-indicated by wrongly suspecting a haemorrhagic transformation.