Background:As mammography X-ray imaging technologies advance and provide elevated contrast in soft tissues,a need has developed for reliable imaging phantoms for use in system design and component calibration.In advan...Background:As mammography X-ray imaging technologies advance and provide elevated contrast in soft tissues,a need has developed for reliable imaging phantoms for use in system design and component calibration.In advanced imaging modalities such as refraction-based methods,it is critical that developed phantoms capture the biological details seen in clinical precancerous and cancerous cases while minimizing artifacts that may be caused due to phantom production.This work presents the fabrication of a breast tissue imaging phantom from cadaveric breast tissue suitable for use in both transmission and refraction-enhanced imaging systems.Methods:Human cancer cell tumors were grown orthotopically in nude athymic mice and implanted into the fixed tissue while maintaining the native tumor/adipose tissue interface.Results:The resulting human–murine tissue hybrid phantom was mounted on a clear acrylic housing for absorption and refraction X-ray imaging.Digital breast tomosynthesis was also performed.Conclusion:Both attenuation-based imaging and refraction-based imaging of the phantom are presented to confirm the suitability of this phantom's use in both imaging modalities.展开更多
Mammographic appearance of the normal breast is altered in the post-operative setting. It is essential to be aware of the normal findings as well as to identify features of recurrent disease with particular emphasis o...Mammographic appearance of the normal breast is altered in the post-operative setting. It is essential to be aware of the normal findings as well as to identify features of recurrent disease with particular emphasis on radiologicalpathological concordance. Digital breast tomosynthesis and volumetric breast density add incremental value in this clinical setting. We present a pictorial review of various cases to illustrate normal post-operative findings as well as mammographic features suspicious for recurrent disease.展开更多
目的通过与全视野数字化乳腺X线摄影(Full Field Digital Mammography,FFDM)对比,探讨数字乳腺断层重建的合成二维图像(Synthetic Mammography,SM)在诊断乳腺良恶性病变中的应用价值。方法回顾性分析我院153例乳腺良、恶性病变患者的FFD...目的通过与全视野数字化乳腺X线摄影(Full Field Digital Mammography,FFDM)对比,探讨数字乳腺断层重建的合成二维图像(Synthetic Mammography,SM)在诊断乳腺良恶性病变中的应用价值。方法回顾性分析我院153例乳腺良、恶性病变患者的FFDM与SM图像,比较2组图像病变可见性评级、影像征象、BI-RADS分类及平均腺体剂量,以病理结果为“金标准”,ROC曲线评估2组图像诊断效能。结果FFDM与SM病变可见性评级存在统计学差异,SM病变显示略优于FFDM(Z=-3.130,P=0.002);2组图像显示乳腺病变影像征象一致性较好,Kappa值为0.827~0.900;FFDM与SM诊断乳腺良恶性病变的曲线下面积分别为0.847(95CI%:0.774~0.921)和0.861(95CI%:0.789~0.933),差异无统计学意义(Z=-1.347,P=0.178);FFDM与SM的平均腺体剂量差异有统计学意义(P<0.001),SM+DBT平均腺体剂量相比FDM+DBT降低约45%(3.29/6.01)。结论SM与FFDM在乳腺良恶性病变诊断中的应用价值相当,SM可替代FFDM作为二维图像与DBT联合应用于乳腺病变检查,且没有增加辐射剂量。展开更多
目的探讨全数字化乳腺X线摄影（full field digital mammography,FFDM）及彩色多普勒血流成像（color Doppler flow imaging,CDFI）对乳腺癌的诊断价值,并分析FFDM及CDFI特征与乳腺良/恶性病变的关系,为提高乳腺癌患者的早期诊断准确率...目的探讨全数字化乳腺X线摄影（full field digital mammography,FFDM）及彩色多普勒血流成像（color Doppler flow imaging,CDFI）对乳腺癌的诊断价值,并分析FFDM及CDFI特征与乳腺良/恶性病变的关系,为提高乳腺癌患者的早期诊断准确率提供依据。方法选取2010年1月至2014年7月本院经手术病理证实且于术前行FFDM及CDFI检查的435例乳腺癌患者和239例乳腺良性肿瘤患者为研究对象。以病理检查结果作为金标准,分别计算FFDM、CDFI及其联合应用对乳腺癌诊断的灵敏度、特异度、正确指数、阳性预测值和阴性预测值,并比较三种方法的诊断结果,进一步分析FFDM及CDFI特征与乳腺良/恶性病变的关系。结果 FFDM对乳腺癌诊断的灵敏度、特异度及正确指数均高于CDFI,FFDM＋CDFI诊断的灵敏度、特异度及正确指数均高于单独诊断。FFDM、CDFI、病理检查结果均一致的患者,乳腺良/恶性病变的FFDM及CDFI特征分析显示,乳腺癌患者的肿块形态不规则、边缘呈毛刺及浸润、结构扭曲及钙化的比例均高于乳腺良性肿瘤（P〈0.05）;乳腺癌患者的肿块形态不规则、边缘呈毛刺、浸润及小分叶、回声不均匀、钙化、血流信号2-4级的比例均高于乳腺良性肿瘤（P〈0.05）。结论 FFDM在乳腺癌的诊断中具有较高的应用价值,FFDM与CDFI联合检查对乳腺癌及不同临床分期乳腺癌的诊断均优于单独诊断。乳腺病变中FFDM及CDFI特征对乳腺良/恶性病变的鉴别诊断有一定意义。展开更多
目的:探讨术前二维超声(two-dimensional ultrasound,2D-US)、声辐射力应变弹性成像(virtual touch imaging,VTI)、全视野数字乳腺X射线摄影(full-field digital mammography,FFDM)评估乳腺癌病变大小的准确性,分析其影响因素。方法:选...目的:探讨术前二维超声(two-dimensional ultrasound,2D-US)、声辐射力应变弹性成像(virtual touch imaging,VTI)、全视野数字乳腺X射线摄影(full-field digital mammography,FFDM)评估乳腺癌病变大小的准确性,分析其影响因素。方法:选取某院收治的经影像学检查显示乳腺影像报告和数据系统(breast imaging reporting and data system,BI-RADS)分级为Ⅳ级以上的80例乳腺癌患者作为研究对象,所有患者均进行2D-US、VTI及FFDM检查。以病理学检查结果为金标准,运用组内相关系数(intraclass correlation coefficient,ICC)比较病变最大径病理测量值与3种影像技术测量值之间的一致性,并探讨影响3种影像技术评估病变大小准确性的因素。结果:2D-US、VTI、FFDM测量值与病理测量值的ICC分别为0.82、0.79、0.58(P均<0.01);2D-US、VTI、FFDM对病变最大径的测量准确率分别为81.25%、80.00%、65.00%。2D-US的影响因素:病理类型、乳腺浸润性导管癌(invasive ductal carcinoma,IDC)伴乳腺导管原位癌(ductal carcinoma in situ,DCIS)(IDC-DCIS)、病变大小、有无微钙化及病变边缘是否清晰;VTI的影响因素:IDC-DCIS、病变大小、有无微钙化、病变边缘是否清晰;FFDM的影响因素:病理分级,雌激素受体(ER)、孕激素受体(PR)、人类表皮生长因子受体2(HER2)表达,乳腺密度,病变类型,距皮深度,病变边缘是否清晰。结论:2D-US和VTI技术评估乳腺癌大小比FFDM更准确,根据患者的影像特征和病理特征选择更优的影像技术评估乳腺癌病变大小有利于精准实施临床个体化治疗。展开更多
基金National Institutes of Health,Grant/Award Number:EB023969 and HL154687。
文摘Background:As mammography X-ray imaging technologies advance and provide elevated contrast in soft tissues,a need has developed for reliable imaging phantoms for use in system design and component calibration.In advanced imaging modalities such as refraction-based methods,it is critical that developed phantoms capture the biological details seen in clinical precancerous and cancerous cases while minimizing artifacts that may be caused due to phantom production.This work presents the fabrication of a breast tissue imaging phantom from cadaveric breast tissue suitable for use in both transmission and refraction-enhanced imaging systems.Methods:Human cancer cell tumors were grown orthotopically in nude athymic mice and implanted into the fixed tissue while maintaining the native tumor/adipose tissue interface.Results:The resulting human–murine tissue hybrid phantom was mounted on a clear acrylic housing for absorption and refraction X-ray imaging.Digital breast tomosynthesis was also performed.Conclusion:Both attenuation-based imaging and refraction-based imaging of the phantom are presented to confirm the suitability of this phantom's use in both imaging modalities.
文摘Mammographic appearance of the normal breast is altered in the post-operative setting. It is essential to be aware of the normal findings as well as to identify features of recurrent disease with particular emphasis on radiologicalpathological concordance. Digital breast tomosynthesis and volumetric breast density add incremental value in this clinical setting. We present a pictorial review of various cases to illustrate normal post-operative findings as well as mammographic features suspicious for recurrent disease.
文摘目的通过与全视野数字化乳腺X线摄影(Full Field Digital Mammography,FFDM)对比,探讨数字乳腺断层重建的合成二维图像(Synthetic Mammography,SM)在诊断乳腺良恶性病变中的应用价值。方法回顾性分析我院153例乳腺良、恶性病变患者的FFDM与SM图像,比较2组图像病变可见性评级、影像征象、BI-RADS分类及平均腺体剂量,以病理结果为“金标准”,ROC曲线评估2组图像诊断效能。结果FFDM与SM病变可见性评级存在统计学差异,SM病变显示略优于FFDM(Z=-3.130,P=0.002);2组图像显示乳腺病变影像征象一致性较好,Kappa值为0.827~0.900;FFDM与SM诊断乳腺良恶性病变的曲线下面积分别为0.847(95CI%:0.774~0.921)和0.861(95CI%:0.789~0.933),差异无统计学意义(Z=-1.347,P=0.178);FFDM与SM的平均腺体剂量差异有统计学意义(P<0.001),SM+DBT平均腺体剂量相比FDM+DBT降低约45%(3.29/6.01)。结论SM与FFDM在乳腺良恶性病变诊断中的应用价值相当,SM可替代FFDM作为二维图像与DBT联合应用于乳腺病变检查,且没有增加辐射剂量。
文摘目的探讨全数字化乳腺X线摄影（full field digital mammography,FFDM）及彩色多普勒血流成像（color Doppler flow imaging,CDFI）对乳腺癌的诊断价值,并分析FFDM及CDFI特征与乳腺良/恶性病变的关系,为提高乳腺癌患者的早期诊断准确率提供依据。方法选取2010年1月至2014年7月本院经手术病理证实且于术前行FFDM及CDFI检查的435例乳腺癌患者和239例乳腺良性肿瘤患者为研究对象。以病理检查结果作为金标准,分别计算FFDM、CDFI及其联合应用对乳腺癌诊断的灵敏度、特异度、正确指数、阳性预测值和阴性预测值,并比较三种方法的诊断结果,进一步分析FFDM及CDFI特征与乳腺良/恶性病变的关系。结果 FFDM对乳腺癌诊断的灵敏度、特异度及正确指数均高于CDFI,FFDM＋CDFI诊断的灵敏度、特异度及正确指数均高于单独诊断。FFDM、CDFI、病理检查结果均一致的患者,乳腺良/恶性病变的FFDM及CDFI特征分析显示,乳腺癌患者的肿块形态不规则、边缘呈毛刺及浸润、结构扭曲及钙化的比例均高于乳腺良性肿瘤（P〈0.05）;乳腺癌患者的肿块形态不规则、边缘呈毛刺、浸润及小分叶、回声不均匀、钙化、血流信号2-4级的比例均高于乳腺良性肿瘤（P〈0.05）。结论 FFDM在乳腺癌的诊断中具有较高的应用价值,FFDM与CDFI联合检查对乳腺癌及不同临床分期乳腺癌的诊断均优于单独诊断。乳腺病变中FFDM及CDFI特征对乳腺良/恶性病变的鉴别诊断有一定意义。
文摘目的:探讨术前二维超声(two-dimensional ultrasound,2D-US)、声辐射力应变弹性成像(virtual touch imaging,VTI)、全视野数字乳腺X射线摄影(full-field digital mammography,FFDM)评估乳腺癌病变大小的准确性,分析其影响因素。方法:选取某院收治的经影像学检查显示乳腺影像报告和数据系统(breast imaging reporting and data system,BI-RADS)分级为Ⅳ级以上的80例乳腺癌患者作为研究对象,所有患者均进行2D-US、VTI及FFDM检查。以病理学检查结果为金标准,运用组内相关系数(intraclass correlation coefficient,ICC)比较病变最大径病理测量值与3种影像技术测量值之间的一致性,并探讨影响3种影像技术评估病变大小准确性的因素。结果:2D-US、VTI、FFDM测量值与病理测量值的ICC分别为0.82、0.79、0.58(P均<0.01);2D-US、VTI、FFDM对病变最大径的测量准确率分别为81.25%、80.00%、65.00%。2D-US的影响因素:病理类型、乳腺浸润性导管癌(invasive ductal carcinoma,IDC)伴乳腺导管原位癌(ductal carcinoma in situ,DCIS)(IDC-DCIS)、病变大小、有无微钙化及病变边缘是否清晰;VTI的影响因素:IDC-DCIS、病变大小、有无微钙化、病变边缘是否清晰;FFDM的影响因素:病理分级,雌激素受体(ER)、孕激素受体(PR)、人类表皮生长因子受体2(HER2)表达,乳腺密度,病变类型,距皮深度,病变边缘是否清晰。结论:2D-US和VTI技术评估乳腺癌大小比FFDM更准确,根据患者的影像特征和病理特征选择更优的影像技术评估乳腺癌病变大小有利于精准实施临床个体化治疗。
