Monitoring of     aortic stent

Benefit of MSI imaging and iodine/water decomposition

Testimonial by Dr. Renard
Radiologist at CHU Amiens - Picardie (Amiens - 80)

Clinical case

Patient history

  • Man age 80 
  • Aortobiiliac stent for subrenal aortic aneurysm 
  • 6-month check-up.

Acquisition

  • Conventional arterial phase acquisition 
  • GSI acquisition in 2 min 
  • Rotational speed: 0.6 s/rot 
  • Helical pitch: 0.984 
  • Slice thickness: 0.625mm 
  • 375 mA 
  • CTDIvol: 12.9 mGy 
  • DLP: 323 mGy-cm


Injection

  • 60 mL at 3.5 mL/s
  • 350 mgI/mL

GSI Data Management

Acquisition console

  • Reconstruction at 55 keV
  • Reconstruction GSI Data File

    • Post-processing console

    • GSI Volume Viewer
    • MSI with iodine suppression
    • MD Iodine (Water)

    Results

    Clinical benefit

    Aortic stents installed for abdominal aortic aneurysm require regular monitoring to check for endoleaks in the aneurysmal sac. A series without injection is required to search for spontaneous hyperdensities in the aneurysmal sac that could be misleading and wrongly lead to an endoleak diagnosis during the injected series. MSI (iodine) reconstruction makes it possible to do without this series and therefore the additional radiation, resulting in a series practically without contrast. The lack of enhancement of the aneurysmal sac is offset by the MD Iodine (Water) series study, demonstrating an absence of iodine in the sac.