Measurement of Carotid Stenosis on Computed Tomographic Angiography: Reliability Depends on Postprocessing Technique Peter Howard, MD, Eric S. Bartlett,

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Measurement of Carotid Stenosis on Computed Tomographic Angiography: Reliability Depends on Postprocessing Technique Peter Howard, MD, Eric S. Bartlett, MD, Sean P. Symons, MD, Allan J. Fox, MD, R.I. Aviv, MBChB Canadian Association of Radiologists Journal Volume 61, Issue 3, Pages 127-132 (June 2010) DOI: 10.1016/j.carj.2009.10.013 Copyright © 2010 Canadian Association of Radiologists Terms and Conditions

Figure 1 (A, B, D) Methodology for stenosis measurement on (A) maximum intensity projection (MIP) parasagittal, (B) axial source (AxS), and (D) axial oblique (AxO) images. (C) AxO multiplanar reformats (MPR) were created by the reading neuroradiologists by aligning the AxO plane perpendicular to the long axis of the residual carotid bulb lumen at the site of tightest stenosis. Canadian Association of Radiologists Journal 2010 61, 127-132DOI: (10.1016/j.carj.2009.10.013) Copyright © 2010 Canadian Association of Radiologists Terms and Conditions

Figure 2 Correlation of (A) axial source (B) axial oblique multiplanar reformat (MPR) and (C) maximum intensity projection (MIP) mean proximal stenosis measurement with NASCET-style reference. Canadian Association of Radiologists Journal 2010 61, 127-132DOI: (10.1016/j.carj.2009.10.013) Copyright © 2010 Canadian Association of Radiologists Terms and Conditions