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Brain perfusion CT for acute stroke using a 256-slice CT: improvement of diagnostic information by large volume coverage

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Abstract

Objectives

To compare a 256-slice CT with a simulated standard CT for brain CT perfusion (CTP).

Methods

CTP was obtained in 51 patients using a 256-slice CT (128 detector rows, flying z-focus, 8-cm detector width, 80 kV, 120mAs, 20 measurements, 1 CT image/2.5 s). Signal-to-noise ratios (SNR) were compared in grey and white matter. Perfusion maps were evaluated for cerebral blood flow (CBF), cerebral blood volume (CBV) and mean transit time (MTT) in hypoperfused areas and corresponding contralateral regions. Two reconstructed 10-mm slices for simulation of a standard CT (SDCT) were compared with the complete data sets (large-volume CT, LVCT).

Results

Adequate image quality was achieved in 50/51 cases. SNR were significantly different in grey and white matter. A perfusion deficit was present in 27 data sets. Differences between the hypoperfusions and the control regions were significant for MTT and CBF, but not for CBV. Three lesions were missed by SDCT but detected by LVCT; 24 lesions were covered incompletely by SDCT, and 6 by LVCT. 21 lesions were detected completely by LVCT, but none by SDCT.

Conclusions

CTP imaging of the brain using an increased detector width can detect additional ischaemic lesions and cover most ischaemic lesions completely.

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Authors and Affiliations

  1. Department of Radiology, Klinikum rechts der Isar, Technical University, Munich, Germany

    F. Dorn, D. Muenzel, R. Meier, E. J. Rummeny & A. Huber

  2. Department of Neurology, Klinikum rechts der Isar, Technical University, Munich, Germany

    H. Poppert

  3. Klinikum rechts der Isar der Technischen Universität München, Institut für Radiologie, Ismaninger Str. 22, 81675, München, Germany

    F. Dorn

Authors
  1. F. Dorn
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  2. D. Muenzel
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  3. R. Meier
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  4. H. Poppert
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  5. E. J. Rummeny
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  6. A. Huber
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Correspondence to F. Dorn.

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Dorn, F., Muenzel, D., Meier, R. et al. Brain perfusion CT for acute stroke using a 256-slice CT: improvement of diagnostic information by large volume coverage. Eur Radiol 21, 1803–1810 (2011). https://doi.org/10.1007/s00330-011-2128-0

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  • DOI: https://doi.org/10.1007/s00330-011-2128-0

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