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Dual Source CT Lung Perfused Blood Volume Imaging With Dual Energy

SOMATOM Definition Dual Energy scanning

Author: Jiří Ferda MD PhD, Boris Kreuzberg MD PhD
Plzen University Hospital, Prag, Czech Republic

History

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.
 

Diagnosis

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.
 

Comments

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

Scanner
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
0,6mm
Kernel B20f

Date: 2008-04-10


Case Studies

The information presented is for illustration only and is not intended to be relied upon by the reader for instruction as to the practice of medicine. Any health care practitioner reading this information is reminded that they must use their own learning, training and expertise in dealing with their individual patients. This material does not substitute for that duty and is not intended by Siemens Healthcare to be used for any purpose in that regard.

The drugs and doses mentioned herein are consistent with the approval labelling for uses and/or indications of the drug. The treating physician bears the sole responsibility for the diagnosis and treatment of patients, including drugs and doses prescribed in connection with such use. The Operating Instructions must always be strictly followed when operating the system. The source for the technical data is the corresponding data sheets. Results may vary.

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