Dual Source CT Lung Perfused Blood Volume Imaging With Dual Energy

SOMATOM Definition Dual Energy scanning

Jiří Ferda MD PhD, Boris Kreuzberg MD PhD
Plzen University Hospital, Prag, Czech Republic
 |  2008-04-10


20 years old female patient after closure of open foramen ovale with Amplatz´s occludor suffered for two days by chest pain was referred to chest CT-angiography. A scan of the thorax was performed on the SOMATOM Definition using spiral Dual-Energy data acquisition.


Pulmonary embolism affecting single segment – lateral segment of the right lower lobe – was found with corresponding deficit of perfusion on the pulmonary blood-volume (PBV) map.


Pulmonary blood-volume maps created during dual-energy data evaluation showed perfusion deficit within affected segment according to the sub-total occlusion of the segmental pulmonary artery by the embolus.

Examination Protocol

SOMATOM Definition
Scan area Thorax
Scan length 275 mm
Scan time 10s
Scan direction Cranio-Caudal
kV 140 / 80 kV
Effective mAS 20 / 150 eff mAS
Rotation time 0.5s
Slice collimation 0,6mm
Reconstructed slice thickness
Kernel B20f

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