Surgical Neurology
Volume 65, Issue 1 , Pages 18-25 , January 2006

Size and location of ruptured and unruptured intracranial aneurysms measured by 3-dimensional rotational angiography

  • Jürgen Beck, MD

      Affiliations

    • Department of Neurosurgery, Johann Wolfgang Goethe–University, 60528 Frankfurt am Main, Germany
    • Corresponding Author InformationCorresponding author. Tel.: +49 69 6301 5295; fax: +49 69 6301 7175.
    • ,
  • Stefan Rohde, MD

      Affiliations

    • Institute of Neuroradiology, Johann Wolfgang Goethe–University, 60528 Frankfurt am Main, Germany
    • ,
  • Joachim Berkefeld, MD, PhD

      Affiliations

    • Institute of Neuroradiology, Johann Wolfgang Goethe–University, 60528 Frankfurt am Main, Germany
    • ,
  • Volker Seifert, MD, PhD

      Affiliations

    • Department of Neurosurgery, Johann Wolfgang Goethe–University, 60528 Frankfurt am Main, Germany
    • ,
  • Andreas Raabe, MD, PhD

      Affiliations

    • Department of Neurosurgery, Johann Wolfgang Goethe–University, 60528 Frankfurt am Main, Germany

Received 3 January 2005 ,Accepted 11 May 2005.

  • Image Result

    The 3D-RA images (A-G) of a basilar tip (A-D), a pericallosal artery (E), an MCA (F), and an anterior communicating (G) artery aneurysm are shown, and the computerized size-measurement procedure is de

    The 3D-RA images (A-G) of a basilar tip (A-D), a pericallosal artery (E), an MCA (F), and an anterior communicating (G) artery aneurysm are shown, and the computerized size-measurement procedure is demonstrated. On the computer screen, the images can be deliberately rotated in all directions. For size measurement, it is possible to position a cut plane at the level of the largest extension of the aneurysmal sac (B, blue line; C, E-G, blue plane). Height of the aneurysm was defined as the length of the maximum possible line from the base to the dome that could be fitted on the 3D structure. Thereby, the width of the parent vessel was not included in the measurement; that is, only the actual aneurysmal sac was measured as indicated by the arrows (D-G). Aneurysm width was defined as the maximum length of a line approximately perpendicular to the first line (D, E, F, G). E-G, The computerized size measurement using 3D-RA images is shown for a pericallosal artery (E), an MCA (F), and an anterior communicating artery (G) aneurysm.

  • Image Result
    Results of size measurements with 3D-RA are shown. The bars represent the mean height (black) and width (hatched) of all, that is, ruptured and unruptured aneurysms (All), of RIA and of UIA. There was

    Results of size measurements with 3D-RA are shown. The bars represent the mean height (black) and width (hatched) of all, that is, ruptured and unruptured aneurysms (All), of RIA and of UIA. There was no statistical difference, neither between height (P = .7) nor between width (P = .9) of ruptured and unruptured aneurysms (t test). Error bars indicate the SEM.

  • Image Result
    A, B: Aneurysms were split into 2-mm size categories. The frequencies of UIAs and RIAs in each of the 2-mm size categories are shown for aneurysm height (A) and width (B). The size categories with the

    A, B: Aneurysms were split into 2-mm size categories. The frequencies of UIAs and RIAs in each of the 2-mm size categories are shown for aneurysm height (A) and width (B). The size categories with the highest frequency for RIAs are between 4 and 6 mm in height and 2 and 4 mm in width.

  • Image Result
    The 3D-RA images (A-C) illustrate very small intracranial aneurysms of the anterior communicating artery (A: ruptured, 2.6 × 1.9 mm), the MCA bifurcation (B: unruptured, 1.7 × 1.7 mm), and the M1 segm

    The 3D-RA images (A-C) illustrate very small intracranial aneurysms of the anterior communicating artery (A: ruptured, 2.6 × 1.9 mm), the MCA bifurcation (B: unruptured, 1.7 × 1.7 mm), and the M1 segment of the MCA (C: unruptured, 1.3 × 1.7 mm) of 3 different patients.

PII: S0090-3019(05)00372-1

doi: 10.1016/j.surneu.2005.05.019

Surgical Neurology
Volume 65, Issue 1 , Pages 18-25 , January 2006

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