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[Quantitative perfusion imaging by multi-slice CT in stroke patients].

G Bohner1, A Förschler, B Hamm

  • 1Abteilung Neuroradiologie, Institut für Radiologie, Charité, Campus Mitte, Humboldt-Universität zu Berlin. georg.bohner@charite.de

Rofo : Fortschritte Auf Dem Gebiete Der Rontgenstrahlen Und Der Nuklearmedizin
|June 18, 2003
PubMed
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This study shows that a deconvolution algorithm (DA) in CT perfusion (CTP) effectively detects acute ischemic stroke early. The method accurately identifies perfusion abnormalities, aiding in stroke diagnosis and management.

Area of Science:

  • Neurology
  • Radiology
  • Medical Imaging

Background:

  • Acute ischemic stroke requires rapid diagnosis for effective treatment.
  • CT perfusion (CTP) offers advanced imaging for cerebral blood flow assessment.
  • Parametric deconvolution algorithms enhance CTP analysis.

Purpose of the Study:

  • To evaluate a deconvolution algorithm (DA) for diagnosing stroke patients using multi-slice spiral CT (MS-CT).
  • To assess the accuracy of DA-based CTP in identifying and quantifying acute cerebral ischemia.

Main Methods:

  • 52 patients with suspected acute ischemia underwent MS-CT perfusion.
  • Cerebral blood perfusion (CBP), cerebral blood volume (CBV), and mean transit time (MTT) were calculated using DA.
  • Perfusion abnormalities were assessed, measured, and correlated with patient outcomes.

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Main Results:

  • DA-based CTP achieved 95% sensitivity for ischemia detection on MTT maps.
  • CBV maps demonstrated the highest specificity (100%).
  • Reduced CBP and CBV, and prolonged MTT were significant indicators of infarction.

Conclusions:

  • The DA-based CTP protocol is a valuable tool for early detection of acute cerebral ischemia.
  • This method allows for accurate quantification of perfusion deficits in stroke patients.