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Original Research
An angiographic atlas of intracranial arterial diameters associated with cerebral aneurysms
  1. J Mocco1,
  2. John Huston2,
  3. Kyle M Fargen3,
  4. James Torner4,
  5. Robert D Brown Jr5
  6. for the International Study of Unruptured Aneurysms Investigators
  1. 1Department of Neurosurgery, Vanderbilt University, Nashville, Tennessee, USA
  2. 2Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA
  3. 3Department of Neurosurgery, University of Florida, Gainesville, Florida, USA
  4. 4Department of Epidemiology, University of Iowa, Iowa City, Iowa, USA
  5. 5Department of Neurology, Mayo Clinic, Rochester, Minnesota, USA
  1. Correspondence to Dr Kyle M Fargen, Department of Neurosurgery, University of Florida, Box 100265, Gainesville, FL 32610, USA; Kyle.fargen{at}


Introduction The successful treatment of intracranial aneurysms is dependent on a full understanding of the anatomic relationship of a given aneurysm to its parent artery(s) and nearby branches. Furthermore, new endovascular technologies are often limited by size constraints. Currently, there is no complete atlas describing diameters for each major intracranial arterial segment. We sought to obtain these data by performing a systematic analysis of selected cerebral angiography images from the International Study of Unruptured Intracranial Aneurysms (ISUIA).

Methods Four hundred and forty-five patients with unruptured intracranial aneurysms from the ISUIA database were reviewed. Using previously described techniques, artery diameters were measured for all arteries involved in the aneurysm neck for each patient.

Results Measurements were obtained from 695 different aneurysm-associated arterial segments among 445 patient angiograms (mean 1.6 measurements per aneurysm). Artery diameters, mean, median, SEM and IQRs based upon the different arterial segments are presented.

Conclusions This angiographic almanac of aneurysm-associated intracranial arterial diameters may be of benefit in establishing standard norms through which devices, protocols and research aims may be developed.

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