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RSNA 2003 Scientific Papers > Area vs Diameter Evaluation of Stenosis Degree in ...
 
  Scientific Papers
  SESSION: Neuroradiology/Head and Neck (Cerebral Blood Flow I)

Area vs Diameter Evaluation of Stenosis Degree in Carotid Bifurcations: Assessment with Automated 3D CT Angiography Analysis Method

  DATE: Wednesday, December 03 2003
  START TIME: 11:20 AM
  END TIME: 11:27 AM
  LOCATION: Room N226
  CODE: K12-965
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PARTICIPANTS
PRESENTER
Zishu Zhang MD, PhD
Changsha People's Rep of China
 
CO-AUTHOR
Marja Berg MD
 
Aki Ikonen MD
 
Mervi Kononen MSc
 
Hannu Manninen MD
 
Ritva Vanninen MD
 

Keywords
Carotid arteries, angiography
Carotid arteries, CT
Carotid arteries, stenosis or obstruction
 
Abstract:
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Purpose: To investigate CT angiographic area assessment of carotid artery stenosis.

Methods and Materials: Seventy-two vessels in 36 patients with symptomatic carotid stenosis were evaluated by automated 3D CT-angiography (CTA) analysis method and digital subtraction angiography (DSA). Multiple planar reconstruction (MPR) rotational DSA (rDSA) was conducted in thirty-one patients. Two observers independently performed the measurements on 3D CTA and on MPR rDSA. Correlation, agreement and diagnostic performance were assessed on area assessments. Maximal /minimal (L/S) diameter ratio at the level of stenosis was used to evaluate the impact of morphological changes on measurements.

Results: The interobserver and intraobserver correlation coefficients of area stenosis degree (ASD) on CTA were 0.81 and 0.91, respectively. The intertechnique correlation coefficient of ASD between CTA and MPR rDSA was 0.78. Diameter stenosis degree (DSD) and lumen area at the level of stenosis were poorly correlated with residual deviation of 0.89 when L/S ratio was greater than 1.5. Satisfactory diagnostic performance was obtained in area stenosis assessment of carotid stenosis with reference to DSD of DSA.

Conclusion: Area stenosis assessment in carotid stenosis with advanced 3D CT angiography analysis was reproducible and correlated well with MPR rDSA. ASD gives often less severe estimate of the hemodynamic significance of the carotid stenosis than DSD.

 

 

 


Questions about this event email: zishuzhang@hotmail.com