对比增强3D STIR SPACE序列对子宫内膜异位症患者骶丛神经异常的显示

目的探讨增强 3D STIR SPACE序列对盆腔子宫内膜异位症患者骶丛神经异常的显示价值，并与增强3D VIBE序列进行对比。方法病例组包括30名子宫内膜异位症患者，对照组包括20名健康女性，均接受盆腔MRI检查，包括对比增强3D STIR SPACE序列和增强3D VIBE序列。评估骶丛神经显示的图像质量以及子宫内膜异位症患者中的骶丛神经侵犯。结果对照组和病例组中，3D STIR SPACE序列和3D VIBE序列均能很好地显示骶丛神经纤维（P<0.001）。阅片者应用3D-STIR-SPACE序列对病变的诊断信心分数一致性较强（Kappa=0.684，P<0.001），应用3D-VIBE序列的诊断信心分数一致性一般（Kappa=0.130，P=0.386）。结论对比增强T2-SPACE序列和3D VIBE序列能够清晰显示骶丛神经，前者对盆腔子宫内膜异位症患者骶丛神经异常的显示更有优势

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies