Repeatability,interocular correlation and agreement of optic nerve head vessel density in healthy eyes:a sweptsource optical coherence tomographic angiography study

AIM:To assess the repeatability,interocular correlation,and agreement of quantitative swept-source optical coherence tomography angiography(OCTA)optic nerve head(ONH)parameters in healthy subjects.METHODS:Thir ty-three healthy subjects were enrolled.The ONH of both eyes were imaged four times by a swept-source-OCTA using a 3 mm×3 mm scanning protocol.Images of the radial peripapillary capillary were analyzed by a customized Matlab program,and the vessel density,fractal dimension,and vessel diameter index were measured.The repeatability of the four scans was determined by the intraclass correlation coefficient(ICC).The most well-centered optic disc from the four repeated scans was then selected for the interocular correlation and agreement analysis using the Pearson correlation coefficient,ICC and Bland-Altman plots.RESULTS:All swept-source-OCTA ONH parameters exhibited certain repeatability,with ICC>0.760 and coefficient of variation(CoV)≤7.301%.The obvious interocular correlation was observed for papillary vessel density(ICC=0.857),vessel diameter index(ICC=0.857)and fractal dimension(ICC=0.906),while circumpapillary vessel density exhibited moderate interocular correlation(ICC=0.687).Bland-Altman plots revealed an agreement range of-5.26%to 6.21%for circumpapillary vessel density.CONCLUSION:OCTA ONH parameters demonstrate good repeatability in healthy subjects.The interocular correlations of papillary vessel density,fractal dimension and vessel diameter index are high,but the correlation for circumpapillary vessel density is moderate.

Correlation between abdominal computed tomography signs and postoperative prognosis for patients with colorectal cancer

BACKGROUND Patients with different stages of colorectal cancer(CRC)exhibit different abdominal computed tomography(CT)signs.Therefore,the influence of CT signs on CRC prognosis must be determined.AIM To observe abdominal CT signs in patients with CRC and analyze the correlation between the CT signs and postoperative prognosis.METHODS The clinical history and CT imaging results of 88 patients with CRC who underwent radical surgery at Xingtan Hospital Affiliated to Shunde Hospital of Southern Medical University were retrospectively analyzed.Univariate and multivariate Cox regression analyses were used to explore the independent risk factors for postoperative death in patients with CRC.The three-year survival rate was analyzed using the Kaplan-Meier curve,and the correlation between postoperative survival time and abdominal CT signs in patients with CRC was analyzed using Spearman correlation analysis.RESULTS For patients with CRC,the three-year survival rate was 73.86%.The death group exhibited more severe characteristics than the survival group.A multivariate Cox regression model analysis showed that body mass index(BMI),degree of periintestinal infiltration,tumor size,and lymph node CT value were independent factors influencing postoperative death(P<0.05 for all).Patients with characteristics typical to the death group had a low three-year survival rate(log-rankχ2=66.487,11.346,12.500,and 27.672,respectively,P<0.05 for all).The survival time of CRC patients was negatively correlated with BMI,degree of periintestinal infiltration,tumor size,lymph node CT value,mean tumor long-axis diameter,and mean tumor short-axis diameter(r=-0.559,0.679,-0.430,-0.585,-0.425,and-0.385,respectively,P<0.05 for all).BMI was positively correlated with the degree of periintestinal invasion,lymph node CT value,and mean tumor short-axis diameter(r=0.303,0.431,and 0.437,respectively,P<0.05 for all).CONCLUSION The degree of periintestinal infiltration,tumor size,and lymph node CT value are crucial for evaluating the prognosis of patients with CRC.

2D multi-scale hybrid optimization method for geophysical inversion and its application

Local and global optimization methods are widely used in geophysical inversion but each has its own advantages and disadvantages. The combination of the two methods will make it possible to overcome their weaknesses. Based on the simulated annealing genetic algorithm （SAGA） and the simplex algorithm, an efficient and robust 2-D nonlinear method for seismic travel-time inversion is presented in this paper. First we do a global search over a large range by SAGA and then do a rapid local search using the simplex method. A multi-scale tomography method is adopted in order to reduce non-uniqueness. The velocity field is divided into different spatial scales and velocities at the grid nodes are taken as unknown parameters. The model is parameterized by a bi-cubic spline function. The finite-difference method is used to solve the forward problem while the hybrid method combining multi-scale SAGA and simplex algorithms is applied to the inverse problem. The algorithm has been applied to a numerical test and a travel-time perturbation test using an anomalous low-velocity body. For a practical example, it is used in the study of upper crustal velocity structure of the A＇nyemaqen suture zone at the north-east edge of the Qinghai-Tibet Plateau. The model test and practical application both prove that the method is effective and robust.

Tracking the phase transformation and microstructural evolution of Sn anode using operando synchrotron X-ray energy-dispersive diffraction and X-ray tomography

Tin(Sn)holds great promise as an anode material for next-generation lithium(Li)ion batteries but suffers from massive volume change and poor cycling performance.To clarify the dynamic chemical and microstructural evolution of Sn anode during lithiation and delithiation,synchrotron X-ray energydispersive diffraction and X-ray tomography are simultaneously employed during Li/Sn cell operation.The intermediate Li-Sn alloy phases during de/lithiation are identified,and their dynamic phase transformation is unraveled which is further correlated with the volume variation of the Sn at particle-and electrode-level.Moreover,we find that the Sn particle expansion/shrinkage induced particle displacement is anisotropic:the displacement perpendicular to the electrode surface(z-axis)is more pronounced compared to the directions(x-and y-axis)along the electrode surface.This anisotropic particle displacement leads to an anisotropic volume variation at the electrode level and eventually generates a net electrode expansion towards the separator after cycling,which could be one of the root causes of mechanical detachment and delamination of electrodes during long-term operation.The unraveled chemical evolution of Li-Sn and deep insights into the microstructural evolution of Sn anode provided here could guide future design and engineering of Sn and other alloy anodes for high energy density Li-and Na-ion batteries.

Study of Correlation Coefficient for Breast Tumor Detection in Microwave Tomography

In microwave tomography, it is necessary to increase the amount of diverse observation data for accurate image reconstruction of the dielectric properties of the imaging area. The multi-polarization method has been proposed as a suitable technique for the acquisition of a variety of observation data. While the effectiveness of employing multi-polarization to reconstruct images has been confirmed, the physical considerations related to image reconstruction have not been investigated. In this paper, a compact-sized imaging sensor using multi-polarization for breast cancer detection is presented. An analysis of the correlation coefficient of the received data of adjacent antennas was performed to interpret the imaging results. Numerical simulation results demonstrated that multi-polarization can reconstruct images better compared to single polarizations owing to its low correlation coefficient and condition number.

Correlation between macular blood flow density and stage of diabetic retinopathy

Objective:To investigate the association between the development of diabetic retinopathy and OCTA blood flow density.Methods:A total of 63 patients(100 eyes)diagnosed with type 2 diabetes in Eye Hospital of China Academy of Chinese Medical Sciences from September 2020 to July 2021 were selected,including 44 patients(72 eyes)with diabetic retinopathy and 19 patients(28 eyes)with type 2 diabetes without retinopathy(NDR).All patients underwent OCTA examination,and FAZ,PERIM,AI,FD,SVD,DVD and other indicators were counted.Results:(1)SVD,parafoveal SVD,DVD and parafoveal DVD gradually decreased with the progression of DR(P=0.000).There was no significant difference in SVD and DVD fovea(P>0.05).(2)The correlation coefficients between SVD,SVD,DVD,DVD and DR process were-0.525,-0.586,-0.323,-0.424,respectively(P<0.05),and all showed moderate negative correlation.(3)AI and FD gradually decreased with the progression of DR,and the differences were statistically significant(P=0.011,P=0.000),while FAZ and PERIM showed no significant difference with the progression of DR(P>0.05).(4)The correlation coefficients of FAZ,PERIM and DR progression were:-0.031,0.084(P>0.05),no correlation,AI,FD and DR process correlation coefficient were 0.307,-0.459(P<0.05),respectively,were moderately positive and negative correlation;(5)The correlation coefficients of FAZ,PERIM,AI,FD and age were-0.124,-0.052,0.113,-0.170(P>0.05),respectively.Conclusion:There is a moderate correlation between the progression of DR and the superficial and deep blood flow density of OCTA.It was moderately correlated with AI and FD.OCTA can assist in the assessment of DR disease progression.

基于CT观察退变性腰椎滑脱症与关节突关节角及关节椎弓根角的关系

目的:基于CT观察探讨退变性腰椎滑脱(DLS)与关节突关节角和关节椎弓根角的关系。方法:回顾性收集2020年1月至2022年6月四川省骨科医院收治的169例DLS症患者纳为DLS组,另选取同期于我院体检并伴有腰腿疼痛但未腰椎滑脱的169例年龄匹配患者作为健康组;对比DLS组和健康组的临床资料,单因素以及多因素logistic回归分析影响DLS的危险因素;通过平滑曲线拟合分析关节突关节角和关节椎弓根角与DLS的曲线关系,构建贝叶斯网络模型并对其预测效能进行验证。结果:单因素分析结果显示DLS组在BMI、椎间盘退变、全身关节松弛、腰椎结构及曲度发生改变、韧带松弛、骨质疏松、脱钙、腰椎小关节突病变、合并糖尿病方面均高于健康组(P<0.05);DLS组的关节突关节角与健康组相比减小,关节突关节角不对称以及退变程度为1、2级的人数比例上升,椎弓根角显著增大(P<0.05);多因素分析结果表明BMI增加、椎间盘退变、腰椎结构及曲度发生改变、韧带松弛、骨质疏松、脱钙、全身关节松弛、腰椎小关节突病变、合并糖尿病、关节突关节角减小、关节突关节角不对称、关节突关节的退变以及椎弓根角的增加都是导致DLS发生的危险因素(OR值>1,P<0.05);平滑曲线拟合结果显示,在一定范围内,关节椎弓根角与DLS呈正相关,而关节突关节角和与DLS呈负相关;贝叶斯网络模型及预测推理显示:BMI指数增加、关节突关节角减小、关节突关节角不对称以及椎弓根角的增加与DLS直接相关,当患者关节突关节角减小、关节突关节角不对称以及椎弓根角的增加的概率降为0时,患者DLS发生率由50%降低为37.2%;经过模型验证证明贝叶斯网络预测模型具有良好的区分度、准确度和有效性。结论:基于CT观察可以对DLS有更准确的诊断,且在一定范围内关节突关节角和关节椎弓根角与DLS具有一定的相关性。

肺高分辨率CT测定支气管壁增厚与慢性阻塞性肺疾病病情严重程度及其疗效的关系

目的:探讨肺高分辨率CT(HRCT)支气管壁增厚与慢性阻塞性肺疾病(COPD)肺功能及其疗效的相关性。方法:回顾性选择2020年1月至2022年12月新疆医科大学附属中医医院收治的慢性阻塞性肺疾病患者154例作为观察组;根据第1秒用力呼气容积的百分比(FEV1%)指标,按照2023版COPD全球倡议(GOLD)分级,其中Ⅰ级51例、Ⅱ级45例、Ⅲ级35例及Ⅳ级23例;另选择同期健康体检者67名作为健康对照组。行胸部HRCT扫描,测定双侧肺尖支气管开口部位支气管壁厚度;采用肺功能测定仪测定第1秒用力呼气容量的百分比(FEV1%)、第1秒用力呼气容积(FEV1)与用力肺活量百分比的比值(FEV1/FVC%);采用Pearson相关性分析软件对支气管壁增厚与肺功能和疗效完成相关性分析。结果:观察组左肺支气管壁厚度(1.49±0.21)mm及右肺支气管壁厚度(1.52±0.24)mm均大于健康对照组,差异有统计学意义(t=18.041、15.504,P<0.05);观察组中不同GOLD分级下患者分级越高,左肺支气管壁厚度及右肺支气管壁厚度越厚,不同分级各亚组之间左、右双肺支气管壁厚度差异亦均有统计学意义(F=13.888、25.841,P<0.05);观察组不同GOLD分级患者慢阻肺患者FEV1(1.82±0.32)、FEV1/FVC%(63.09±5.26)及FEV1%(63.36±6.03)水平低于健康对照组,差异有统计学意义(t=6.693、15.392、7.944,P<0.05);观察组中GOLD分级下患者级别越高,FEV1、FEV1/FVC%及FEV1%水平下降越低,观察组不同GOLD分级患者肺功能水平比较差异有统计学意义(F=166.541、141.751、57.120,P<0.05);Pearson相关性分析结果表明:COPD患者肺HRCT左肺及右肺支气管壁增厚与肺功能FEV1、FEV1/FVC%及FEV1%水平呈正相关性(r=0.451、0.503、0.498、0.531、0.488、0.515,P<0.05)。结论:肺HRCT支气管壁厚度在COPD患者中呈高表达,其表达水平能反映患者病情严重程度,且与肺功能存在强相关性。

SiC_(f)/SiC陶瓷基复合材料高温环境损伤原位监测研究进展

连续SiC纤维增强SiC(SiC_(f)/SiC)复合材料具有高比强度、高比模量、耐高温、耐辐照等优点,在先进航空发动机热端部件和核反应堆包壳等领域具有广阔的应用前景。SiC_(f)/SiC复合材料具有纤维、界面、基体等复杂的多尺度结构,其服役环境苛刻、损伤失效过程复杂,深刻理解与准确分析其在近服役环境下损伤失效模式对于材料和构件的可靠服役具有重要意义。传统的“事后分析”方法无法获取材料在复杂服役环境下的损伤失效过程数据,因此迫切需要发展面向高温服役环境的复合材料原位表征测试技术。本文介绍了基于扫描电子显微镜、数字图像相关、显微计算机断层扫描、声发射、电阻等原位监测方法的基本原理、优势与局限性,重点讨论了以上各种原位监测方法及多种原位监测方法联用在SiC_(f)/SiC复合材料高温环境力学表征中的最新研究进展。最后,总结了SiC_(f)/SiC复合材料高温环境原位监测技术存在的挑战,并对多种原位技术联用、太赫兹辐射等新型检测技术、复杂构件的损伤原位监测方法等未来发展方向进行了初步展望。

西宁盆地黄土区草本植物边坡电阻率与土体物理力学性质关系研究

为研究高寒干旱-半干旱环境黄土区种植不同类型草本植物边坡土体电阻率与其物理力学性质之间的定量关系,探讨电阻率数值反映边坡土体物理力学性质及其变化特征,在西宁盆地长岭沟流域自建试验区选取未种植裸坡以及种植生长期为3年的垂穗披碱草(Elymus nutans Griseb.)、老芒麦(Elymus sibiricus Linn.)、细茎冰草(Agropyron trachycaulum Linn.Gaertn.)、高羊茅(Festuca arundinacea Schreb.)的边坡共5种类型边坡为研究对象。通过开展边坡土体密度、含水率、含根系与不含根系土体直剪试验,对比不同草本植物根系对边坡土体物理力学性质的影响。在此基础上,利用二维电阻率层析成像方法建立不同边坡土体物理力学性质指标与土体电阻率间的定量关系。结果表明:(1)与未种植裸坡相比较,种植老芒麦边坡上层(0~10 cm)土体含水率增幅最大为26.53%;种植高羊茅边坡上层(0~10 cm)土体平均密度降幅最大为18.30%;种植垂穂披碱草边坡上层(0~10cm)土体黏聚力附加值最大,且为未种植裸坡的2.75倍。(2)5种类型边坡的电阻率受根系分布和边坡位置因素的共同影响,电阻率随着深度增加逐渐降低。4种草本边坡坡面以下0~20cm处土体电阻率均较裸坡大,该深度为根系分布大致范围。(3)5种边坡土体物理力学性质与电阻率数据之间存在拟合方程式(相关系数R2为0.48~0.77),且通过Pearson相关性分析得到边坡土体黏聚力c与电阻率间的相关性相对最高,相关系数R2为0.765。上述研究结果反映出可通过电阻率层析成像技术反映边坡土体物理力学性质,以及边坡土体中植物根系分布特征,可为研究区及其周边地区采用植物有效防治水土流失、浅层滑坡等灾害提供理论依据和实际指导意义。

Multi-scale structure engineering of covalent organic framework for electrochemical charge storage

Covalent organic frameworks(COFs),which are constructed by linking organic building blocks via dynamic covalent bonds,are newly emerged and burgeoning crystalline porous copolymers with features including programmable topological architecture,pre-designable periodic skeleton,well-defined micro-/meso-pore,large specific surface area,and customizable electroactive functionality.Those benefits make COFs as promising candidates for advanced electrochemical energy storage.Especially,for now,structure engineering of COFs from multiscale aspects has been conducted to enable optimal overall electrochemical performance in terms of structure durability,electrical conductivity,redox activity,and charge storage.In this review,we give a fundamental and insightful study on the correlations between multi-scale structure engineering and eventual electrochemical properties of COFs,started with introducing their basic chemistries and charge storage principles.The careful discussion on the significant achievements in structure engineering of COFs from linkages,redox sites,polygon skeleton,crystal nanostructures,and composite microstructures,and further their effects on the electrochemical behavior of COFs are presented.Finally,the timely cutting-edge perspectives and in-depth insights into COFbased electrodematerials to rationally screen their electrochemical behaviors for addressing future challenges and implementing electrochemical energy storage applications are proposed.

边缘特征和深度加权约束的重力三维相关成像反演

相关成像作为一种利用相关系数定性解释地质体空间位置的快速成像方法,其不需要求解大型方程组就能够快速高效地得到地下异常体的分布,具有计算方法简单稳定、计算速度快的优点。但是重力异常直接相关成像的结果存在深部发散、深度加权函数参数过多以及异常体之间横向分辨率和纵向分辨率低的问题。本文根据重力异常三维相关成像反演的基本原理,引入重力异常均衡垂向导数和均衡解析信号振幅作为边缘特征对重力异常相关成像进行水平加权,并且提出了一种更为简洁的深度加权函数。通过一系列的模型试验证明重力异常边缘特征约束提高了相关成像的横向分辨率;使用新的深度加权函数提高了相关成像的纵向分辨率。最后,将本文方法应用到澳大利亚Olympic Dam多金属矿区的实际资料中,加权成像的结果与实际地质资料相吻合,证明了该方法的正确性和有效性。

光源探测器阵列密度对近红外漫射光相关断层成像的影响

近红外漫射光相关断层成像技术(Diffuse Correlation Tomography,DCT)是一种乳腺微血管血流成像的新技术,但成像的空间分辨率不足,高密度光源探测器(Source and Detector,S-D)阵列的布置方式是否可以有效提高DCT空间分辨率目前尚不清楚。为了研究S-D阵列密度对于DCT血流重建图像空间分辨率的影响,设计了3种S-D阵列,密度分别为24、48和96。结合蒙特卡洛仿真和DCT血流图像重建方法,研究了S-D阵列对于2种含有高血流异质物(模拟乳腺恶性肿瘤)的乳腺组织血流重建效果的影响。结果表明,高密度的SD阵列交错排布可以提高DCT血流重建的空间分辨率,可提升临床早期筛查时乳腺恶性肿瘤成像的精确性和稳定性。

血清学指标在老年冠心病患者中的表达与冠状动脉病变程度的相关性

目的 探讨冠心病患者血清可溶性酪氨酸激酶1(sFlt-1)、趋化因子CC配体3(CCL3)水平与冠状动脉病变程度的相关性。方法 选取2020年11月至2022年11月新乡市中心医院心血管内科收治的老年冠心病患者230例(冠心病组),根据Gensini评分将冠心病组又分为轻度组89例,中度组95例和重度组46例,另选取同期本院健康体检者230例(对照组)。酶联免疫吸附检测血清sFlt-1、CCL3水平。ROC曲线分析血清sFlt-1、CCL3水平对冠心病的诊断价值。Pearson相关性分析血清sFlt-1、CCL3水平与冠状动脉病变程度的关系。结果 冠心病组血清sFlt-1、CCL3水平明显高于对照组[(121.71±29.80)ng/L vs(98.70±17.57)ng/L,(18.22±5.41)ng/L vs(13.68±3.89)ng/L,P<0.01]。ROC曲线分析显示,sFlt-1+CCL3联合诊断冠心病的曲线下面积明显大于sFlt-1、CCL3单独诊断(0.886 vs 0.791、0.775,P<0.01)。与轻度组比较,中度组及重度组血清sFlt-1、CCL3水平及Gensini评分明显升高,且重度组血清sFlt-1、CCL3水平及Gensini评分明显高于中度组,差异有统计学意义(P<0.05)。Pearson相关性分析显示,血清sFlt-1、CCL3水平与Gensini评分呈正相关(r=0.420,r=0.479,P<0.01)。结论 冠心病患者血清sFlt-1、CCL3水平明显升高,且血清sFlt-1、CCL31水平与冠状动脉病变程度密切相关。

光谱CT钙抑制成像技术在鼻窦炎评估中的应用

目的探索双层探测器光谱CT的钙抑制(CaSupp)技术在鼻窦炎评估中的有效性和准确性,为鼻窦炎的临床诊断提供新的工具。方法回顾性收集2019年3月~2023年9月就诊于解放军总医院海南医院的鼻窦炎患者30例,患者在1周内行鼻窦光谱CT和MRI检查,30例患者6组鼻窦[上颌窦(左、右)、筛窦(左、右)、蝶窦、额窦],共纳入174个鼻窦。根据患者所行检查技术,将患者分为钙抑制组和MRI组;CaSupp组根据其钙抑制指数分为40、50、60钙抑制组,并对CaSupp图像和MRI图像进行定性诊断和定量分析。基于CaSupp图像及MRI图像对鼻窦炎进行定性诊断,并采用卡方检验进行一致性检验。基于不同的钙抑制图像和MR图像对同一患者相同部位的鼻窦黏膜厚度进行测量,采用Pearson法及组内相关系数进行可靠性检验。结果CaSupp图像显示阳性鼻窦(有炎症的鼻窦)151个,阴性鼻窦(无炎症的鼻窦)23个;MRI图像显示阳性鼻窦155个,阴性鼻窦19个;CaSupp图像与MRI图像对鼻窦炎的诊断差异无统计学意义(P>0.05)。CaSupp指数为40、50、60钙抑制组对鼻黏膜厚度的测量结果与MRI组具有相关性(P<0.001);组内相关系数分析证实其组内相关系数系数分别为0.947、0.847及0.920。结论双层探测器光谱CT钙抑制技术对鼻窦炎的定性诊断和定量分析具有较高价值,且CaSupp指数为40时钙抑制图像在定量分析上与MRI图像的相关性最高。基于光谱CT的钙抑制技术为鼻窦炎的临床诊断及评估提供一种简单、有效的新方法。

原位冷冻电镜技术和可视蛋白质组学前沿

近年来,随着原位冷冻电镜技术和人工智能技术的不断发展,结构生物学的研究模式发生了重大转变。结构解析不再局限于分离提纯的单一生物大分子,而是在细胞甚至组织内原位直接解析生物大分子的高分辨率结构,并对亚细胞区域整体分子景观进行结构探索,从而更深刻地理解细胞与组织内生命活动的分子机制。通过展示细胞内不同蛋白质复合物的精细原位结构,可以进一步生成蛋白质组的可视化定量空间分子结构功能图谱,即可视蛋白质组学。以原位冷冻电镜技术为代表的新技术能够在空间水平阐明细胞内蛋白质组的三维相互作用网络,促进从整体上系统性地理解细胞内生物大分子结构功能与互作机制。为推动中国原位冷冻电镜技术和可视蛋白质组学的发展,本文总结了其研究模式和最新前沿进展,结合具体实例展示了新概念与新技术的先进性,并对发展前景进行了展望。

激素敏感性前列腺癌患者中PSMA PET/CT衍生参数与循环肿瘤DNA特征之间的相关性分析

背景与目的:前列腺特异性膜抗原(prostate-specific membrane antigen,PSMA)正电子发射计算机体层显像(positron emission tomography/computed tomography,PET/CT)和循环肿瘤DNA(circulating tumor DNA,ctDNA)的检测结果都是激素敏感性前列腺癌(hormone-sensitive prostate cancer,HSPC)治疗决策的参考依据。本研究旨在分析HSPC患者中PSMA PET/CT衍生参数与ctDNA特征之间的相关性。方法:回顾性纳入于复旦大学附属肿瘤医院就诊且接受PSMA PET/CT和ctDNA测序的间隔≤2周、有完整病历记录的HSPC患者。排除存在除前列腺癌外的活动性恶性肿瘤,以及组织学特征支持纯神经内分泌癌或小细胞癌诊断的患者。本研究经复旦大学附属肿瘤医院伦理委员会批注(伦理编号:1909207-12)。采用Spearman相关系数评价PSMA PET/CT衍生参数最大标准摄取值(maximum standardized uptake value,SUVmax)、总肿瘤体积(total tumor volume,TTV)、病灶摄取总量(total lesion uptake,TLU)与ctDNA分数(ctDNA%)之间的相关性。结果:共纳入60例HSPC患者,TP53(3.3%)、BRCA2(3.3%)和ATM(3.3%)是最常见的突变基因。在相关性分析中,ctDNA%与SUVmax有显著相关性(Spearman’s rho=0.272,P=0.036);ctDNA%与TLU(Spearman’s rho=0.160,P=0.222)和TTV(Spearman’s rho=0.162,P=0.215)无显著相关性。结论:SUVmax与ctDNA%之间有显著相关性,提示与无PSMA阳性病灶和低PSMA摄取病灶的患者相比,存在高PSMA摄取病灶的患者接受联合靶向治疗的概率增加,本研究结果有望作为制订个体化治疗方案的参考。

胰腺脂肪浸润CT表现与冠状动脉硬化狭窄程度相关性分析

目的:探究胰腺脂肪浸润(PFI)CT表现与冠状动脉粥样硬化狭窄严重程度的相关性。方法:回顾性收集住院患者212例,行上腹部CT扫描后,将90例诊断为PFI的患者纳入试验组,另外122例非PFI患者纳入对照组。通过冠状动脉CT血管造影(CTA)诊断冠状动脉狭窄的严重程度,在腹部平扫CT图像上观察胰腺形态并测量CT值。比较两组患者一般资料及胰腺、脾、肝CT值,总体及不同性别患者冠脉狭窄程度,分析冠脉狭窄的危险因素及胰腺CT值与冠脉狭窄相关性。结果:试验组患者年龄和空腹血糖高于对照组,胰腺CT值低于对照组(均P<0.05)。试验组冠脉狭窄程度高于对照组(P<0.05)。试验组男性冠脉狭窄率高于女性(P<0.05)。试验组男性患者冠脉狭窄程度高于对照组。年龄是对照组的独立危险因素,胰腺CT值是试验组的独立危险因素(均P<0.05)。试验组中胰腺CT值与冠脉狭窄程度呈负相关(r=-0.538,P<0.05)。结论:PFI患者胰腺CT值与冠脉狭窄呈负相关,有助于预测冠状动脉狭窄的发生风险。

肺腺癌患者CT征象表现与P53、E-cadherin、TGF-β1蛋白表达的相关性

目的探讨肺腺癌患者计算机断层扫描(CT)征象表现及与抑癌基因(P53)、上皮钙黏蛋白(E-cadherin)、转化生长因子-β1(TGF-β1)蛋白表达的相关性。方法选择2020年1月至2022年12月在新乡市中心医院行手术切除的97例肺腺癌患者为研究对象,采用免疫组化法检测肺腺癌组织及癌旁组织P53、E-cadherin、TGF-β1蛋白表达情况,术前采用德国西门子64排多层螺旋CT增强扫描,分析CT征象与P53、E-cadherin、TGF-β1蛋白表达的相关性。结果肺腺癌组织P53、TGF-β1蛋白阳性表达率高于癌旁组织,E-cadherin蛋白阳性表达率低于癌旁性组织(P<0.05);有棘突征、毛刺征和分叶征CT征象的肺腺癌组织中P53蛋白阳性表达率高于无棘突征、毛刺征和分叶征CT征象者(P<0.05);有棘突征、毛刺征CT征象的肺腺癌组织中E-cadherin蛋白阳性表达率低于无棘突征、毛刺征CT征象者(P<0.05);有血管集束征、毛刺征、分叶征CT征象的肺腺癌组织中TGF-β1蛋白阳性表达率高于无血管集束征、毛刺征、分叶征CT征象者(P<0.05)。结论肺腺癌组织P53、TGF-β1蛋白表达增高,E-cadherin蛋白表达降低,其阳性表达率与肺腺癌患者CT征象存在一定的相关性。

基于OCT分析2型糖尿病患者脉络膜厚度变化及其与视网膜病变的相关性

目的分析基于光学相干断层成像(OCT)检查探讨2型糖尿病患者脉络膜厚度变化及与视网膜病变的相关性。方法回顾性分析150例(150眼)2型糖尿病患者临床资料,依据早期糖尿病视网膜病变(DR)治疗标准分成无DR组43眼、增生型DR组51眼、非增生型DR组56眼。所有患者均接受OCT检查,分析脉络膜体积与脉络膜厚度变化;将非增生型DR依据疾病严重程度分成轻度、中度与重度,比较不同程度组间脉络膜厚度与脉络膜体积变化。运用Spearman相关性分析脉络膜厚度变化与疾病严重程度的相关性;并分析脉络膜厚度、脉络膜体积对疾病严重程度的识别效能。结果增生型DR组、非增生型DR组的脉络膜厚度和脉络膜体积均高于无DR组,差异均有统计学意义(t分别=4.51、2.77、5.41、3.03,P均<0.05),非增生型DR组的脉络膜厚度和脉络膜体积均低于增生型DR组,差异均有统计学意义(t分别=2.14、2.68,P均<0.05);非增生型DR组中,轻度组的脉络膜厚度和脉络膜体积高于中度组与重度组,中度组的脉络膜厚度和脉络膜体积高于重度组,差异均有统计学意义(t分别=2.20、4.11、4.43、6.58、2.26、2.30,P均<0.05)。经Spearman相关性分析,脉络膜厚度、脉络膜体积与非增生型DR的严重程度呈负相关(rs分别=-0.52、-0.48,P均<0.05)。脉络膜厚度、脉络膜体积识别非增生型DR严重程度的曲线下面积(AUC)分别为0.85、0.90。结论2型糖尿病患者DR不同阶段脉络膜厚度和脉络膜体积均会产生变化,且对于非增生型DR,随着疾病进展,脉络膜厚度可变薄,脉络膜体积变小。