肝硬化患者4D flow MRI血流动力学参数与中医证型的相关性研究

目的探讨肝硬化患者4D flow MRI血流动力学参数与中医证型的相关性。方法将118例肝硬化患者依据中医辨证分为肝气郁结证、湿热蕴结证、肝肾阴虚证、脾肾阳虚证、瘀血阻络证5个证型,所有患者均行门静脉4D flow MRI检查,统计不同证型肝硬化患者分布情况,观察门静脉系统(门静脉主干、脾静脉、肠系膜上静脉)的血流动力学参数,包括血流量、流速、壁剪切力等,比较不同证型患者门静脉血流动力学参数差异。结果肝硬化代偿期以肝气郁结证、湿热蕴结证为主,肝硬化失代偿期以脾肾阳虚、瘀血络阻证为主;A级以肝气郁结证、湿热蕴结证为主,B、C级以瘀血络阻证为主。瘀血络阻证肝硬化患者门静脉主干及脾静脉血流量明显高于肝气郁结证、湿热蕴结证患者(P<0.05);脾肾阳虚证门静脉主干血流量明显高于肝气郁结证肝硬化患者(P<0.05);瘀血络阻证肝硬化患者门静脉主干流速及剪切力较肝气郁结证和湿热蕴结证低。结论肝硬化患者中医辨证分型与门静脉血流动力学参数具有一定相关性,4D flow MRI可为肝硬化的中医辨证提供血流动力学参考。

1.5 T MRI对子宫内膜癌术前分期的诊断价值

目的分析1.5 T MRI对子宫内膜癌术前分期的诊断价值。方法回顾性选取2019年1月至2023年12月就诊于新疆生产建设兵团第二师库尔勒医院妇科且临床资料完整的42例子宫内膜癌患者作为研究对象,术前均接受1.5 T MRI检查且影像学资料完整。以术后病理分期结果为“金标准”,检验术前1.5 T MRI对子宫内膜癌分期的一致性及诊断效能。结果42例患者术后病理诊断检出Ⅰ期27例(64.29%)、Ⅱ期6例(14.29%)、Ⅲ期8例(19.05%)、Ⅳ期1例(2.38%);术前1.5 T MRI检出Ⅰ期25例(59.52%)、Ⅱ期9例(21.43%)、Ⅲ期6例(14.29%)、Ⅳ期2例(4.76%),与术后病理诊断结果的吻合度较强(Kappa=0.829);术前1.5 T MRI鉴别诊断子宫内膜癌Ⅰ期、Ⅱ期、Ⅲ期、Ⅳ期的准确度(95.24%、97.62%、92.86%、97.62%)、敏感度(92.59%、100.00%、75.00%、100.00%)、特异度(100.00、97.22%、97.06%、97.22%)较高;术前1.5 T MRI鉴别诊断Ⅰa期、Ⅰb期的敏感度为100%,特异度为83.33%,准确度为96.30%,与术后病理诊断的吻合度较强(Kappa=0.886)。结论1.5 T MRI在子宫内膜癌术前分期诊断中具有较高的吻合度,且各期诊断的准确度、敏感度及特异度均较高,并且在Ⅰ期的浸润程度评估中同样具有较高价值,可为临床子宫内膜癌患者术前病情诊断及手术方案的制定提供客观依据,临床应用价值较高。

内耳1.5T MRI钆造影对可疑梅尼埃病的诊断价值

目的1.5T MRI条件下经咽鼓管给药行内耳3D-FLAIR序列MRI扫描,探讨其对可疑梅尼埃病的诊断价值。方法选取2019年3月-2023年10月在我院就诊的可疑梅尼埃病患者38例做为研究对象,经咽鼓管注射钆双胺24小时后进行内耳MRI检查,分析前庭及耳蜗膜迷路积水情况。结果38例可疑梅尼埃患者中临床确诊梅尼埃病31例,伴发眩晕的突聋4例,前庭性偏头痛2例,良性阵发性位置性眩晕1例。31例确诊梅尼埃患者中内淋巴积水27例,无积水4例,其中27例内淋巴积水患者中合计有32耳积水,其中双耳积水5例,单耳积水22例,32耳积水中轻度积水12耳,重度积水20耳。非梅尼埃患者中内淋巴积水1例、为轻度积水,无积水6例。内耳1.5T MRI钆造影对梅尼埃病诊断的灵敏度为87.1%、特异度85.7%,ROC曲线下面积为0.864,对于临床诊断价值较高。结论经咽鼓管给药内耳1.5T MRI钆造影可清晰显示内耳膜迷路积水情况,对梅尼埃病的诊断是可行的。

Correlation of Hamstring Tendon Size in Pre-Operative MRI Measurement with Intra-Operative Graft Size in Primary Anterior Cruciate Ligament (ACL) Reconstruction

Background: The size of Hamstring autograft of less than 8.0 mm in ACL re-construction is one of the key factors that may contribute to the failure of the graft. In this study, we are going to assess the correlation of pre-operative MRI measurement of Hamstring tendons with the intra-operative ACL graft. Thus, it may help surgeons to anticipate the needs for graft augmentation should the final graft size be smaller than expected. Methods: We retrospectively re-viewed 41 cases of ACL reconstructions in which MRI were done pre-operatively, in Hospital Pakar Sultanah Fatimah (HPSF), Muar between January 2019 until December 2022. MRI measurements of Hamstring tendon (semitendinosus: ST, and gracilis) were done by a radiologist, and the in-tra-operative notes were reviewed for the final graft size. Pearson’s correlation coefficients were calculated to determine the relationship between graft size and tendon cross-sectional area. The intraclass correlation (ICC) by using two-way mixed model with type consistency, the reliability based on average measure was 0.41 (95% CI: ?0.10, 0.69). A p-value < 0.05 was considered sig-nificant. Results: Of 105 patients with primary ACL reconstruction done be-tween January 2019 to December 2022, only 41 patients were included in this study. There was fair correlation (p = 0.048) between pre-operative MRI measurement and the graft diameter intra-operatively. The mean of 17.0 mm of combined diameter of ST and gracilis tendon in MRI may results in graft diameter of 8.3 mm. There was also positive correlation between patients’ height and the intra-operative graft size. Conclusion: These results showed good correlation between pre-operative MRI measurement of Hamstring ten-don size with the intra-operative graft size, hence it is a reliable tool to predict the Hamstring autograft size in ACL reconstruction.

Fetal MRI Artifacts: Semi-Supervised Generative Adversarial Neural Network for Motion Artifacts Reducing in Fetal Magnetic Resonance Images

This study addresses challenges in fetal magnetic resonance imaging (MRI) related to motion artifacts, maternal respiration, and hardware limitations. To enhance MRI quality, we employ deep learning techniques, specifically utilizing Cycle GAN. Synthetic pairs of images, simulating artifacts in fetal MRI, are generated to train the model. Our primary contribution is the use of Cycle GAN for fetal MRI restoration, augmented by artificially corrupted data. We compare three approaches (supervised Cycle GAN, Pix2Pix, and Mobile Unet) for artifact removal. Experimental results demonstrate that the proposed supervised Cycle GAN effectively removes artifacts while preserving image details, as validated through Structural Similarity Index Measure (SSIM) and normalized Mean Absolute Error (MAE). The method proves comparable to alternatives but avoids the generation of spurious regions, which is crucial for medical accuracy.

3.0T MRI检查结合X线钼靶对良恶性乳腺肿瘤患者的诊断效能分析

目的:探究临床采用3.0T磁共振成像(MRI)检查结合X线钼靶检查对良恶性乳腺肿瘤患者的诊断价值。方法:选取龙口市人民医院2021年1月—2024年1月收治的乳腺肿瘤患者60例为对象,均进行3.0T MRI与X线钼靶检查,并以病理学检查结果作为临床最终诊断结果,分析3.0T MRI与X线钼靶单一及联合诊断良恶性乳腺肿瘤患者的效能。结果:结合临床病理学最终诊断,60例乳腺肿瘤患者中42例为恶性病变,18例为良性病变;3.0T MRI检查检出32例为恶性病变,28例为良性病变;X线钼靶检查检出34例为恶性病变,26例为良性病变;联合检查检出40例为恶性病变,20例为良性病变。3.0T MRI联合X线钼靶诊断准确率、灵敏度均高于两者单一诊断,漏诊率低于两者单一诊断(P<0.05)。恶性病变形态不规则、钙化、结构不对称、MRI早期增强率≥60%的检出率均显著高于良性病变,恶性病变ADC值小于良性病变(P<0.05)。结论:临床在对乳腺肿瘤患者诊断过程中联合应用3.0T MRI与X线钼靶诊断,能够有效提升临床对该部分患者诊断准确性,促使患者迅速确诊。

在胆囊结石合并肝外胆总管结石诊断中128层螺旋CT与3.0T MRI应用价值的分析

目的:分析128层螺旋CT与3.0T MRI在在胆囊结石合并肝外胆总管结石诊断中的应用价值。方法:选取2021年3月—2023年2月于苏州市立医院接受治疗的116例疑似胆囊结石合并肝外胆总管结石患者,均接受128层螺旋CT与3.0T MRI检查,以手术结果为金标准,比较两种检查方式诊断价值。结果:116例疑似患者中,手术结果 82例阳性,34例阴性,经128层螺旋CT诊断真阳性65例,真阴性25例;经3.0T MRI诊断真阳性80例,真阴性31例;3.0T MRI诊断灵敏度、特异度、准确率均高于128层螺旋CT,其中灵敏度、准确率差异有统计学意义(P<0.05);手术结果显示直径<0.5 cm结石22个,直径0.5~1.00 cm结石28个,直径> 1.00 cm结石32个,128层螺旋CT与3.0T MRI磁共振对不同大小结石检出准确率对比差异无统计学意义(P> 0.05)。结论:在胆囊结石合并肝外胆总管结石诊断中,3.0T MRI的诊断具有较大的优势,检出率相对较高,可为医生诊断工作的开展提供有价值的参考。

3.0T MRI磁敏感加权成像序列对急性脑梗死合并脑微出血的诊断价值

目的探讨3.0T MRI磁敏感加权成像(SWI)序列对急性脑梗死(ACI)合并脑微出血(CMBs)的诊断价值,为临床提供参考。方法回顾性分析2023年9月至2024年3月敦煌市医院收治的172例疑似ACI患者的临床资料,所有患者均行头颅CT、扩散加权成像(DWI)序列与SWI序列检查,观察头颅CT、DWI序列与SWI序列检查对ACI合并CMBs的诊断效能。结果CT、DWI序列、SWI序列对ACI合并CMBs检出率分别为70.00%、80.00%、90.00%,3种方法的检出率比较,差异无统计学意义(P>0.05)。经一致性分析,CT检查诊断ACI合并CMBs的灵敏度为70.00%,特异度为50.00%,准确率为54.55%,Kappa值为0.134;DWI检查诊断ACI合并CMBs的灵敏度为80.00%,特异度为63.24%,准确率为67.05%,Kappa值为0.315;SWI检查诊断ACI合并CMBs的灵敏度为90.00%,特异度为88.24%,准确率为88.64%,Kappa值为0.707。结论SWI序列检查诊断ACI合并CMBs具有较高的灵敏度和准确率,且一致性较高,具有良好的诊断效能。

3.0T MRI多模态技术联合血清ERCC1对局部进展期直肠癌新辅助治疗转归评估研究

目的探究3.0T MRI多模态技术联合血清切除修复交叉互补基因1(ERCC1)评估局部进展期直肠癌(LARC)新辅助治疗转归的临床价值。方法选取2020年1月~2022年10月我院170例LARC患者,按7∶3比例将患者随机分为建模人群(119例)、验证人群(51例)。所有患者均行新辅助治疗,治疗前均行3.0T MRI多模态技术扫描和血清ERCC1 mRNA检测。新辅助治疗8周后行手术治疗,取术中病灶组织评估肿瘤退缩分级,比较不同肿瘤退缩分级患者治疗前多模态MRI定量参数[容积转移常数(K^(trans))、组织间隙血浆速率常数(K_(ep))、血管外细胞外间隙容积分数(V_(e))、表观扩散系数(ADC)]、血清ERCC1 mRNA表达水平,比较治疗前不同临床分期患者MRI定量参数、血清ERCC1 mRNA表达水平,分析各指标与治疗前临床分期、治疗后肿瘤退缩分级的相关性,通过受试者工作特征曲线(ROC)、临床决策曲线(DCA)评价各指标预测肿瘤退缩分级的价值。结果非病理完全缓解(pCR)患者治疗前K^(trans)、V_(e)、K_(ep)、血清ERCC1 mRNA表达水平高于pCR患者,ADC低于pCR患者(P<0.05);Ⅱ期患者K^(trans)、V_(e)、K_(ep)、血清ERCC1 mRNA表达水平低于Ⅲ期患者,ADC高于Ⅲ期患者(P<0.05);K^(trans)、V_(e)、K_(ep)、血清ERCC1 mRNA表达水平与临床分期呈正相关,与肿瘤退缩分级呈负相关,ADC与临床分期呈负相关,与肿瘤退缩分级呈正相关(P<0.05);建模人群中,治疗前MRI定量参数、血清ERCC1 mRNA联合预测患者肿瘤退缩分级为pCR的AUC最大;验证人群中,MRI定量参数、血清ERCC1 mRNA联合预测具有明显正向净收益。结论MRI定量参数、血清ERCC1与患者临床分期、肿瘤退缩分级有关,且以上指标联合预测肿瘤退缩分级为pCR方面具有较好预测价值和临床适用性。

合成MRI在O-RADS MRI 3~5分卵巢附件肿物良恶性鉴别中的价值

目的探索合成MRI(synthetic MRI,syMRI)对卵巢-附件影像报告和数据系统(Ovarian-Adnexal Reporting and Data System,O-RADS)MRI 3~5分的卵巢附件占位良恶性鉴别的效能。材料与方法回顾性分析在2021年8月至2023年6月期间于我院就诊的100例盆腔占位患者病例及影像资料,共计附件肿块126例,所有占位的O-RADS MRI评分均为3~5分。以手术病理或至少1年的随访结果为诊断标准。所有患者均在3.0 T MRI扫描仪上进行盆腔MRI扫描,包括syMRI及扩散加权成像(diffusion-weighted imaging,DWI)序列。在附件区病灶的实性成分的最大层面勾画感兴趣区,以获得syMRI定量参数[T1、质子密度(proton density,PD)、T2^(*)、R2^(*)]及表观扩散系数(apparent diffusion coefficient,ADC)值。采用独立样本t检验或Mann-Whitney U检验比较各参数的差异,通过logistic回归分析建立syMRI及syMRI+ADC诊断模型,采用受试者工作特征(receiver operating characteristic,ROC)曲线比较各参数及模型的诊断效能,DeLong检验比较各模型ROC曲线下面积(area under the curve,AUC)的差异。结果入组100例患者共126个病灶,其中良性55例,恶性71例。T1、T2^(*)、R2^(*)及ADC值在两组间差异有统计学意义(P<0.05),其鉴别卵巢附件良恶性病变的AUC分别为0.739[95%置信区间(confidence interval,CI):0.652~0.826]、0.780(95%CI:0.698~0.862)、0.783(95%CI:0.699~0.866)及0.674(95%CI:0.576~0.772)。syMRI及syMRI+ADC模型的AUC分别为0.860(95%CI:0.791~0.929)及0.879(95%CI:0.818~0.940),二者之间差异无统计学意义,均高于ADC值(P<0.05)。结论syMRI在鉴别O-RADS MRI 3~5分卵巢附件病变的良恶性中具有很好的效能。

Gradient coil design with enhanced shielding constraint for a cryogen-free superconducting MRI system

The relatively fragile low-temperature stability of cryogen-free superconducting magnetic resonance imaging(MRI)magnets requires the careful management of exogenous heat sources.A strongly shielded gradient magnetic field is important for the optimal operation of cryogen-free MRI systems.In this study,we present an enhanced shielding method incorporating a regionalized stray field constraining strategy.By optimizing the constraint parameters,we could develop engineering-feasible gradient coil schemes without increasing system complexity but with the stray field intensity reduced by half.In real measurement in an integrated MRI system,the developed gradient assembly demonstrated good performance and supported to output images of excellent quality.Our findings suggested that the proposed method could potentially form a useful design paradigm for cryogen-free MRI magnets.

3.0T MRI联合经阴道超声弹性成像技术在子宫肌瘤及子宫腺肌病诊断中的应用价值

目的:探讨3.0T核磁共振成像(MRI)联合经阴道超声弹性成像技术在子宫肌瘤及子宫腺肌病诊断中的应用价值。方法:回顾性分析2021年1月至2022年1月期间华北医疗健康集团峰峰总医院收治的56例子宫肌瘤和41例子宫腺肌病患者,所有患者均行3.0T MRI检查和经阴道超声弹性成像技术检查,以病理诊断为“金标准”,比较MRI、经阴道超声弹性成像技术和两者联合的诊断结果,记录不同检查方法的诊断情况,并分析总符合率,计算灵敏度、特异度和准确率。结果:3.0T MRI联合经阴道超声弹性成像检查子宫肌瘤的诊断总符合率为96.43%,MRI诊断的总符合率为75.00%,经阴道超声诊断的总符合率为80.36%,联合、单独检测的总符合率差异均有统计学意义(x^(2)=10.500、7.049,P<0.05);MRI联合经阴道超声弹性成像检查子宫腺肌病的诊断总符合率为97.56%,显著高于MRI(78.05%)和经阴道超声弹性成像(78.05%)单独检查,差异有统计学意义(x^(2)=7.289、7.289,P<0.05);MRI、超声阴道弹性成像技术单独检测及联合检测子宫肌瘤的灵感度分别为71.74%、78.26%及95.62%,特异度分别为90.00%、90.00%及100.00%,准确率分别为75.00%、80.36%及96.43%,其灵敏度及准确率联合检测明显高于MRI单独检测(x^(2)=5.029、10.500,P<0.05),联合检测的准确率明显高于阴道超声单独检测(x^(2)=7.049,P<0.05);MRI、超声阴道弹性成像技术单独检测及联合检测子宫腺肌病的灵感度分别为81.25%、78.73%及96.88%,特异度分别为66.67%、77.78%及100.00%,准确率分别为78.05%、78.05%及97.56%;联合检测的准确率明显高于MRI和阴道超声单独检测,差异有统计学意义(x^(2)=7.289、7.289,P<0.05)。结论:3.0T MRI联合经阴道超声弹性成像技术在子宫肌瘤及子宫腺肌病中确诊率更高,有较好的诊断价值,能为临床医生治疗提供可靠的参考资料。

1.5T MRI在子宫肌瘤诊断中的应用效果评估

目的:评估检查诊断子宫肌瘤疾病时应用1.5T MRI的临床效果。方法:选取2021年3月—2022年3月黔南布依族苗族自治州瓮安县人民医院妇科收治的疑似子宫肌瘤患者87例作为研究对象,均采用1.5T MRI技术对疾病实施检查诊断,以手术病理检查结果为“金标准”,分析1.5T MRI技术的临床诊断结果及诊断效能。结果:病理学检查结果显示,87例疑似子宫肌瘤患者中阳性36例,阴性51例。1.5T MRI技术检出阳性患者35例,阴性患者50例;1.5T MRI技术敏感度、特异度及准确率分别是97.22%、98.04%、97.70%。结论:为保障临床医师诊断子宫肌瘤疾病的准确性,可以通过1.5T MRI技术对患者病情进行检查与诊断,该技术在子宫肌瘤疾病的检查诊断中有较高敏感度、特异度、准确率,能够为医师提供数据参考。

ARGA-Unet:Advanced U-net segmentation model using residual grouped convolution and attention mechanism for brain tumor MRI image segmentation

Background Magnetic resonance imaging(MRI)has played an important role in the rapid growth of medical imaging diagnostic technology,especially in the diagnosis and treatment of brain tumors owing to its non invasive characteristics and superior soft tissue contrast.However,brain tumors are characterized by high non uniformity and non-obvious boundaries in MRI images because of their invasive and highly heterogeneous nature.In addition,the labeling of tumor areas is time-consuming and laborious.Methods To address these issues,this study uses a residual grouped convolution module,convolutional block attention module,and bilinear interpolation upsampling method to improve the classical segmentation network U-net.The influence of network normalization,loss function,and network depth on segmentation performance is further considered.Results In the experiments,the Dice score of the proposed segmentation model reached 97.581%,which is 12.438%higher than that of traditional U-net,demonstrating the effective segmentation of MRI brain tumor images.Conclusions In conclusion,we use the improved U-net network to achieve a good segmentation effect of brain tumor MRI images.

Multinuclear MR and MRI study of lithium-ion cells using a variable field magnet and a fixed frequency RF probe

An exploratory multinuclear magnetic resonance(MR)and magnetic resonance imaging(MRI)study was performed on lithium-ion battery cells with ^(7)Li,^(19)F,and ^(1)H measurements.A variable field superconducting magnet with a fixed frequency parallel-plate radiofrequency(RF)probe was employed in the study.The magnetic field was changed to set the resonance frequency of each nucleus to the fixed RF probe frequency of 33.7 MHz.Two cartridge-like lithium-ion cells,with graphite anodes and LiNi_(0.5)Mn_(0.3)Co_(0.2)O_(2)(NMC)cathodes,were interrogated.One cell was pristine,and one was charged to a cell voltage of 4.2 V.The results presented demonstrate the great potential of the variable field magnet approach in multinuclear measurement of lithium-ion batteries.These methods open the door for developing faster and simpler methods for detecting,quantifying,and interpreting MR and MRI data from lithium-ion and other batteries.

Superconducting joints using reacted multifilament MgB_(2)wires:A technology toward cryogen-free MRI magnets

The development of superconducting joining technology for reacted magnesium diboride(MgB_(2))conductors remains a critical challenge for the advancement of cryogen-free MgB_(2)-based magnets for magnetic resonance imaging(MRI).Herein,the fabrication of superconducting joints using reacted carbon-doped multifilament MgB_(2)wires for MRI magnets is reported.To achieve successful superconducting joints,the powder-in-mold method was employed,which involved tuning the filament protection mechanism,the powder compaction pressure,and the heat treatment condition.The fabricated joints demonstrated clear superconducting-to-normal transitions in self-field,with effective magnetic field screening up to 0.5 T at 20 K.To evaluate the interface between one of the MgB_(2)filaments and the MgB_(2)bulk within the joint,serial sectioning was conducted for the first time in this type of superconducting joint.The serial sectioning revealed space formation at the interface,potentially caused by the volume shrinkage associated with the MgB_(2)formation or the combined effect of the volume shrinkage and the different thermal expansion coefficients of the MgB_(2)bulk,the filament,the mold,and the sealing material.These findings are expected to be pivotal in developing MgB_(2)superconducting joining technology for MRI magnet applications through interface engineering.

The Value of MRI and CT in the Diagnosis of Retroperitoneal Tumours

Objective:This study aimed to investigate the effectiveness and value of MRI and CT in the diagnosis of retroperitoneal tumours.Methods:60 patients with retroperitoneal tumours admitted to our hospital between July 2022 and March 2023 were selected as the study subjects.All of them received MRI and CT examinations.The detection of the two examination methods was compared and analyzed using the pathological findings as the standard.Results:The detection rate of MRI(58/60,96.67%)was significantly higher than that of CT(50/60,83.33%),and the difference was significant(P=0.015<0.05).Conclusion:Both MRI and CT have important application values in the diagnosis of retroperitoneal tumours.MRI has advantages in observing soft tissue structures,nerve tissues,etc.,and can provide more detailed anatomical structure information,which can help differentiate the retroperitoneal tumours and locate them accurately.CT,on the other hand,has unique advantages in observing the skeletal structure and the density of certain tumours,etc.It can quickly obtain comprehensive imaging information,which helps to determine the extent and invasion of the tumour.

CT and MRI Findings of Intracranial Cavernous Hemangioma Malformation

Objective:To investigate the computed tomography(CT)and magnetic resonance imaging(MRI)features of cavernous hemangioma malformation(CHM)to enhance diagnostic accuracy.Methods:The CT and MRI findings and clinical information of 23 patients with CHM were retrospectively analyzed.Results:CT examinations were conducted in 7 cases,while MRI was utilized in 23 cases.Additionally,SWI was employed in 5 cases and enhanced imaging techniques were applied in 14 cases.Among the observed lesions,20 cases presented with a singular lesion,whereas 3 cases exhibited multiple lesions.The lesions were located in 8 frontal lobes,6 cerebellums,2 brainstems,6 temporal lobes,1 basal ganglia,3 parieto-occipital lobes,and 2 thalamus regions.The nodules appeared as quasi-circular lesions with clear or well-defined boundaries.They presented as isodense lesions on CT scans,with one lesion showing peritumoral edema.On MRI,T1-weighted imaging(T1WI)demonstrated isointense signals,while T2-weighted imaging(T2WI)showed isointense and hyperintense signals.Additionally,10 lesions exhibited a low signal ring on T2WI.Diffusion-weighted imaging(DWI)revealed nodular or isointense low signals,while susceptibility-weighted imaging(SWI)displayed enlarged areas of low signal.Fourteen lesions underwent contrast-enhanced scanning,with 2 lesions showing no obvious enhancement,1 lesion demonstrating mild to moderate enhancement,and 11 lesions exhibiting significant enhancement.Notably,6 of these enhanced lesions were surrounded by small blood vessels.Conclusion:Cavernous hemangioma malformation is more commonly found in individual cases.CT alone lacks specificity,making it prone to misdiagnosis.A more comprehensive evaluation of cavernous hemangioma malformation can be achieved through a combination of MRI,DWI,SWI,and enhanced examination,providing valuable references for clinical assessment.

3.0T MRI联合成像技术在臂丛神经检查中的应用价值

目的:分析3.0T MRI联合成像技术在臂丛神经检查中的应用价值。方法:选取2021年4月—2022年8月于庆阳市人民医院行臂丛神经损伤治疗的患者48例,所有患者均进行MRI及超声检查。以手术结果为金标准,比较两种检查方法的诊断效能以及3.0T MRI联合成像技术检查臂丛神经损伤的影像学特征。结果:手术结果显示48例患者中臂丛神经节前损伤20例,节后损伤36例。MRI诊断节前损伤的灵敏度、特异度、阳性预测值和准确率高于超声诊断,MRI诊断节后神经损伤的灵敏度、特异度、阳性预测值、阴性预测值和准确率高于超声诊断,差异均有统计学意义(P<0.05)。结论:与超声检查结果相比较,3.0T MRI联合成像技术在臂丛神经检查中更具有优势,能够提高神经损伤的诊断效能以及神经损伤的具体情况,为后续治疗提供重要依据。

3.0T MRI对子宫肌瘤和子宫腺肌症的鉴别诊断价值

目的:探讨3.0T MRI对子宫肌瘤和子宫腺肌症的鉴别诊断价值。方法:回顾性分析2022年1月—2024年2月在宝应县人民医院就诊且经手术病理确诊为子宫肌瘤(48例)和子宫腺肌症(50例)的患者临床资料,比较两组MRI的影像表现和直方图参数,分析MRI对二者的鉴别诊断价值。结果:子宫肌瘤组边界欠清晰、结合带厚度>1.2 cm、内膜基底毛糙、T_(1)WI和T_(2)WI病灶内圆点状高信号出现频次较子宫腺肌症组低,差异有统计学意义(P<0.05),瘤周高信号环、T_(2)WI病灶内涡状高信号出现频次较子宫腺肌症组高,差异有统计学意义(P<0.05);T_(1)WI直方图参数与子宫腺肌症组比较差异无统计学意义(P>0.05),T_(2)WI最大值、标准差和偏度值,ADC标准差和偏度值均较子宫腺肌症组高,差异有统计学意义(P<0.05)。结论:3.0T MRI可为子宫肌瘤和子宫腺肌症的鉴别诊断提供重要依据,值得临床重视。