Dynamic CSF MRI Findings in the Diagnosis and Follow-up of Arnold Chiari Type 1

Aim:
 Chiari malformation is a spectrum of diseases that includes different subtypes, has wide clinical presentation, and therefore follow-up treatment methods. We aimed to compare scoring systems cerebrospinal fluid (CSF) dynamics obtained by magnetic resonance imaging (MRI) in Arnold Malformation Type-1 (CM-1) patients the preoperative postoperative periods.
 Material Method:
 Twenty-one with diagnosis CM-1 who underwent CSF MRI between January 2016 June 2020 were included. In addition, 21 healthy volunteers evaluated. All had undergone decompression surgery due related symptoms. The relationship findings was Changes compared. 
 Results:
 Measurements made just below level cerebellar tonsil. higher peak positive velocity anteriorly (PPV: 6.26±2.72 vs 3.89±1.74 cm/s; p=0.001) negative (PNV: -7.45±3.36 -3.61±2.65 than volunteers. Preoperative net flow posterior subarachnoid space lower (p=0.017).
 Aliasing reverse seen 13(62%) patients.
 PPV PNV decreased after 4.73±1.94 cm/s, p=0.017; PNV: -4.97±1.97, p=0.005). Net Flow increased posteriorly (0.32 2.21 ml/min; p=0.053).
 Postoperative response inversely proportional degree tonsillar herniation. As Asgari score cases increases, Peak Positive Negative Velocity Anterior values also increase statistically significant correlation (p=0.003; p=0,032 respectively)
 Conclusions:
 Our suggest determination morphology using MR correlates may be useful tool determining need timing surgery.