弥散加权成像联合磁共振动态增强扫描在宫颈癌术前分期中诊断价值研究

目的 分析弥散加权成像(DWI)联合磁共振动态增强扫描(DCE-MRI)在宫颈癌术前分期中的诊断价值.方法 回顾性分析自2016年3月至2021年3月安徽医科大学附属宿州医院收治的90例宫颈癌患者的临床资料,并将患者纳入B组.另选取同期行妇科常规检查、细胞学检查排除宫颈病变者70例纳入A组.比较A组与B组的表观扩散系数...     

全身磁共振背景抑制扩散成像在直肠癌术前分期中的应用价值

目的探讨全身磁共振背景抑制扩散加权成像(DWIBS)对直肠癌术前分期的应用价值。资料与方法对39例经肠镜证实的直肠癌患者,术前行全身磁共振DWIBS检查,以直肠癌原发灶病理结果为标准将本组资料分为T2、T3、T4三组,分析原发灶DWIBS上肿瘤信号强度、表观扩散系数(ADC)值、肠壁病变厚度、肠壁受累长度、肿瘤侵犯肠周径的情况五个指标在各组间的差异,及其与T分期的相关性。通过全身DWIBS图像作出术前NM分期,然后与术后NM病理分期结果进行对照,判断DWIBS对直肠癌NM分期的准确性、特异性及敏感性。结果全身DWIBS对直肠癌原发灶检出的敏感性为100%,准确性为100%,DWIBS上所显示的肠壁病变厚度和肠周径侵犯程度在各分期间有显著差异(P<0.05),且两者与T分期均有显著相关性(rs=0.427,P<0.05;rs=0.384,P<0.05);原发灶肿瘤信号强度、ADC值、肠壁受累长度在各分期间均无显著差异(P>0.05)。DWIBS对N分期诊断的总体准确性为84.61%;对N0期诊断的敏感性为85.71%,特异性为83.33%,N1期诊断的敏感性为70.00%,特异性为89.66%,N2期诊断的敏感性为100%,特异性为80.65%。对M期诊断的敏感性及准确性均为100%。结论全身DWIBS对直肠癌NM分期的诊断敏感性较高,是显示转移性淋巴结及远处转移病灶的一种有效检查方法。全身DWIBS对直肠癌原发灶检出的准确性及敏感性很高,但在T分期中的应用有一定的限度,结合常规MRI序列有助于提高T分期的准确性。     

磁共振扩散加权成像及动态增强扫描在宫颈癌分期中的应用

【摘要】目的：探讨常规MRI联合扩散加权成像（DWI）和动态增强（DCE）MRI在宫颈癌诊断及分期中的价值。方法：35例经手术病理或活检证实的宫颈癌患者按临床治疗方式分为手术组（20例）和非手术组（15例）,以病理及临床分期为参照,评估常规MRI联合DWI、DCE-MRI（多模态MRI）对宫颈癌的分期诊断准确性。结果：手术组中常规MRI和多模态MRI对宫颈癌分期诊断符合率分别为 80%（16/20）和95%（19/20）。术后病理证实盆腔淋巴结转移4例,MRI检出3例。非手术组中多模态MRI分期与临床分期符合率为67%（10/15)。结论：常规MRI联合DWI和DCE-MRI可提高对宫颈癌分期的准确性,有助于宫颈癌治疗方案的制定。     

3.0T T2 WI联合弥散加权成像对直肠癌术前TN分期中的应用价值

目的 探讨3.0T磁共振T2加权成像(T2WI)联合弥散加权成像(DWI)对直肠癌术前TN分期中的应用价值.方法 选取我院80例直肠癌患者,行3.0T磁共振T2WI联合DWI检查,开展术前TN分期评估,并对比术前评估结果与术后病理分期的一致性.结果 3.0T T2 WI联合DWI评估直肠癌T分期的总体准确率为83.75...     

MRI在子宫内膜癌术前分期中的应用

子宫内膜癌是一种常见的妇科恶性肿瘤，约占女性全部恶性肿瘤的7％，术前准确分期对临床制定治疗方案有重大帮助。MRI是准确显示肿瘤侵犯肌层、宫颈的唯一影像学检查方法，并能确定宫旁组织的侵犯及淋巴结转移，因而有助于治疗前分期。就近年献中有关子宫内膜癌的MRI表现及其分期予以综述。     

水脂分离增强序列在3.0T磁共振直肠癌术前分期中的应用

目的:将水脂分离增强扫描序列应用于直肠癌磁共振术前分期检查,探讨其在直肠癌术前分期中的应用价值。方法:选择经肠镜活检证实为直肠癌患者46例,随机盲法均分为两组,一组序列采用常规序列及T1脂肪抑制增强扫描序列;另一组序列采用常规序列及水脂分离增强扫描序列,结果与病理分期对照,比较两组序列图像信噪比及T、N分期。结果:组一T分期总敏感度为74%,特异度为78%。N分期总敏感度为74%,特异度为74%;N0分期敏感度78.6%,特异度66.7%,准确率为78%;N1分期敏感度57%,特异度81%,准确率为71%;N2分期敏感度100%,特异度100%,准确率为100%。组二T分期总敏感度为83%、特异度为83%;N分期总敏感度91%,特异度为91%;N0分期敏感度94%,特异度83%,准确率为94%;N1分期敏感度75%,特异度95%,准确率为75%;N2分期敏感度100%,特异度94.5%,准确率为100%。结论:水脂分离序列可提高图像信噪比,脂相有助于提高N分期,此序列在直肠癌术前分期中具有一定的临床应用价值。     

MRI在子宫内膜癌术前分期中的应用

子宫内膜癌是一种常见的妇科恶性肿瘤,约占女性全部恶性肿瘤的7%,术前准确分期对临床制定治疗方案有重大帮助.MRI是准确显示肿瘤侵犯肌层、宫颈的唯一影像学检查方法,并能确定宫旁组织的侵犯及淋巴结转移,因而有助于治疗前分期.就近年文献中有关子宫内膜癌的MRI表现及其分期予以综述.     

MRI在直肠癌术前TNM分期中的应用价值

直肠癌术前准确的分期是切除术成功的关键。MRI是直肠癌术前分期诊断最重要的检查方法之一,通过MRI准确的术前分期,可以准确评估肿瘤浸润的深度和淋巴结转移,了解肿瘤与直肠系膜、直肠系膜筋膜的关系,在全直肠系膜切除术(TME)之前准确预测环状切缘(CRM),为临床诊断和治疗提供更多有价值的信息。就MRI应用于直肠癌术前TNM分期的研究进展进行综述。     

DWI结合高分辨T_2WI磁共振在子宫内膜癌分期中的价值

目的:探讨DWI结合高分辨T2WI在子宫内膜癌分期中的价值。方法:回顾性分析70例经手术病理证实的子宫内膜癌DWI及高分辨T2WI表现,测量其ADC值,判断其浸润范围,并与术后病理结果相比较。结果:DWI结合高分辨T2WI对子宫内膜癌2009FIGO分期准确性为94.3%,评价浅肌层、深肌层浸润的敏感度、特异度和准确度分别为94.5%、82.4%、94.3%和83.3%、95.3%、94.3%;评价子宫内膜癌宫颈基质浸润的敏感度、特异度和准确度分别为100%、100%和100%。结论:DWI结合高分辨T2WI磁共振能够提高子宫内膜癌浸润深度评价的准确度,有助于子宫内膜癌的诊断、分期及帮助制定治疗计划。     

MSCT对胃癌术前TN分期的临床应用价值

目的探讨MSCT检查在胃癌TN分期的临床应用价值。方法回顾性分析我院2011年1月~2014年12月经病理或手术证实的50例胃癌患者的MSCT平扫及双期增强扫描资料,并与术后病理结果对照,评价MSCT在胃癌TN分期的临床应用价值。结果 MSCT胃癌T分期诊断的总体准确率为74%(37/50),其中对T1、T2、T3和T4期判断的特异度分别为75.0%、73.3%、71.4%、80.0%,敏感度分别为75.0%、68.5%、75.0%、80.0%。MSCT胃癌N分期诊断的总体准确率为71.7%(33/46),其中对N0、N1、N2期判断的特异度分别为73.3%、71.4%、70.0%,敏感度分别为73.3%、68.2%、77.8%。结论 MSCT对胃癌术前TN分期的诊断具有较高准确性,可以为临床选择治疗方案、评估预后提供重要的参考价值。     

Detection and staging of renal neoplasms: a reassessment of MR imaging

The use of magnetic resonance (MR) imaging in the detection and staging of renal neoplasms was investigated in 104 patients with 106 renal cell carcinomas confirmed at surgery or autopsy. Overall, MR imaging demonstrated 101 of 106 lesions (95%), including all 93 tumors that were larger than 3 cm in diameter but only eight of the 13 smaller tumors (62%). MR imaging enabled accurate staging of 82% of all detected lesions but led to the understaging of nine lesions and the overstaging of nine. At present, MR imaging cannot be used as a screening modality for renal tumors. However, its negative predictive values of 98% and 99%, respectively, for the evaluation of tumor vascular extension and tumor spread to adjacent structures makes it an excellent staging modality that should be used when the CT findings are equivocal. MR imaging is not accurate in indicating bowel and mesentery involvement, but rapid technical advances and the introduction of bowel contrast medium may improve this present limitation.     

MR staging of endometrial carcinoma

Endometrial cancer is the second most common gynaecological malignancy. The usual presentation with post-menopausal bleeding results in an early diagnosis in most cases and thus there is opportunity for cure. Magnetic resonance (MR) imaging is pivotal in the decision-making process regarding treatment options. We present a review of the magnetic resonance (MR) findings to illustrate its role in the staging of endometrial cancer.     

多种磁共振技术联合应用对前列腺癌诊断的价值

回顾多种MR技术(常规MR、波谱分析、扩散加权成像以及动态增强扫描)在前列腺癌诊断中的应用,不同技术之间的联合应用对提高前列腺癌的正确诊断率的作用。     

Endometrial carcinoma staging by MR imaging

The potential of magnetic resonance (MR) imaging in the detection of endometrial carcinoma and in the assessment of its extent was evaluated prospectively in 51 patients clinically suspected of having the disease. MR imaging findings were compared with the results of surgical-pathologic staging and lymph node sampling following hysterectomy. Histologic findings showed 45 patients to have endometrial carcinoma, three to have no residual tumor after dilatation and curettage, and three to have adenomatous hyperplasia of the endometrium. MR imaging demonstrated an endometrial abnormality in 43 of the 51 patients (84%). Endometrial carcinoma could not be differentiated from adenomatous hyperplasia or blood clots. Therefore, MR imaging was not specific for tumor detection, and histologic diagnosis remains essential. The overall accuracy of MR imaging in staging endometrial carcinoma was 92%; its overall accuracy in demonstrating the depth of myometrial invasion was 82%. Demonstration of lymphadenopathy and adnexal or peritoneal metastases by MR imaging was suboptimal.     

磁共振成像对宫颈癌的诊断与分期研究

目的 探讨MRI在宫颈癌诊断和分期中的临床价值：方法回顾性分析了35例宫颈癌患者的MRI分期，并与临床分期和手术结果对照。结果 MR能清晰显示宫颈癌的准确部位、实际大小、以及与周围的关系。对Ib-Ⅳ期宫颈癌MRI术前分期的准确度为78．6％（22／28）。对宫旁浸润区分的准确度为94．3％，特异度为958％，敏感度为90．9％。结论官颈癌的MR诊断与分期明显优于临床，能为手术方案的制定提供依据。     

CT and MR imaging in staging bladder neoplasms

Thirteen patients with bladder carcinoma were examined by magnetic resonance (MR) imaging and CT to determine the relative accuracy of the modalities in staging bladder carcinoma. Magnetic resonance correctly identified the presence or absence of extravesical spread of carcinoma in 10 of 13 patients (77%). Two patients were understaged and one was overstaged. Computed tomography correctly staged nine of 13 patients (69%), with three patients understaged and one patient overstaged. Neither MR nor CT was able to determine depth of invasion of the bladder wall in the absence of extravesical spread.