DANTE prepulse SPACE MR sequence in quantitative evaluation of arachnoid granules
10.13929/j.1003-3289.201810095
- VernacularTitle: 基于DANTE预脉冲SPACE MR序列定量评价蛛网膜颗粒
- Author:
Yang YU
1
Author Information
1. Department of Radiology, Xuanwu Hospital of Capital Medical University
- Publication Type:Journal Article
- Keywords:
Arachnoid granulations;
Delay alternating with nutation for tailored excitation;
Magnetic resonance imaging
- From:
Chinese Journal of Medical Imaging Technology
2019;35(4):592-595
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the value of delay alternating with nutation for tailored excitation (DANTE)- sampling perfection with application optimized contrast using different flip-angle evolution (SPACE) sequences in quantitative evaluation of arachnoid granules (AG). Methods Thirty patients with arachnoid granules confirmed by conventional imaging were enrolled. All patients underwent SPACE and DANTE-SPACE sequences scanning. Distribution characteristics of arachnoid particles in sinus cavities and cranial plate on SPACE and DANTE-SPACE sequence images were evaluated, and the measurements were performed and statistically analyzed, including maximum cross-sectional area, longest diameter, SNR and CNR. Results A total of 43 arachnoid particles were detected with SPACE sequence, 29 in the sinus cavities and 14 in the cranial plate, while 45 arachnoid particles were found with DANTE-SPACE, 31 in the sinus cavities and 14 in the cranial plate. SPACE and DANTE-SPACE sequences showed no statistically significant difference in distribution of arachnoid particles (χ2=0.155, P=0.997). In the sinus cavity, SPACE and DANTE-SPACE sequences showed significant differences of the maximum cross-sectional area ([32.55±17.08]mm2, [29.15±16.24]mm2), the longest diameter ([7.13±2.00]mm, [6.42±1.81]mm), SNR (88.82±29.57, 83.30±32.11) and CNR (45.99±28.57, 65.33±30.96) of arachnoid particles (all P<0.05), but no statistical difference was found in maximum cross-sectional area ([21.62±9.01]mm2 and [21.83±9.04]mm2), longest diameter ([6.74±2.83)mm, [6.66±2.87]mm), SNR(86.91±35.48, 76.82±36.20) nor CNR(16.87±6.32, 20.07±12.76) in the cranial plate (all P>0.05). Conclusion DANTE-SPACE can effectively inhibit slow blood flow artifacts in the sinus, and accurately display arachnoid particles.
