MRI of Pulsatile CSF Motion Within Arachnoid Cysts

Magn Reson Imaging. Sep-Oct 1988;6(5):575-84. doi: 10.1016/0730-725x(88)90132-4.


Flow void due to pulsatile motion of cerebrospinal fluid (CSF) has recently been demonstrated by a variety of magnetic resonance techniques with sensitivity to slow flow. It has been suggested that within fluid collections not communicating with the physiologic CSF space, there is less signal loss than with the physiologic CSF spaces. Utilizing the SSFP MR technique, which is sensitive to flow as slow as 1 mm/sec, we evaluated three patients with isolated arachnoid cysts. Irregular signal loss consistent with fluid motion was noted within all of the cysts, as well as within the physiologic CSF spaces. Definitive anatomic evaluation of these lesions, though, required ventriculography, an invasive technique.

MeSH terms

  • Arachnoid / diagnostic imaging
  • Arachnoid / pathology*
  • Brain Diseases / cerebrospinal fluid
  • Brain Diseases / diagnostic imaging
  • Cerebral Ventricles / pathology
  • Cerebral Ventriculography
  • Cysts / cerebrospinal fluid*
  • Cysts / diagnostic imaging
  • Humans
  • Hypertrophy
  • Magnetic Resonance Imaging*
  • Tomography, X-Ray Computed