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最大信号强度
    The early-phase enhancement parameters of dynamic contrast-enhanced MRI which are onset time,maximum signal intensity and early-phase enhancement rate differ from those of BPH (p < 0.01 , 0.05, 0.01), but there are some overlap between them.
    Pca MRI动态增强的早期强化参数开始时间、最大信号强度及早期强化率与BPH不同(p分别<0.01、0.05、0.01),但两者之间有部分重叠。
    The maximum signal intensity and early-phase enhancement rate in both Pca and BPH showed an association with MVD expression (p < 0.05 or 0.01) .
    Pca和BPH的MRI动态增强参数中的最大信号强度和早期强化率与MVD的表达有相关性(p<0.05或0.01)。
    Results The enhancement parameters of dynamic contrast-enhanced MRI including onset time,maximum signal intensity and early-phase enhancement rate were differed from those of BPH((P<)0.05) or 0.01.The level of MVD of prostatic cancer were significantly higher than those of BPH(P<0.001).
    前列腺癌的MVD的测定水平高于BPH(P<0.001)。 前列腺癌和BPH的MRI动态增强参数中的最大信号强度和早期强化率与MVD有相关性(P<0.05或0.01)。
    Methods PWI was performed in 31 patients to get signal intensity percentage time curves of perilesion and contralarteral symmetric region,which were used to calculate maximum signal reduction ratio (SRRmax) and relative cerebrum blood volume (rCBV). The ratio Q of SRRmax and rCBV in both ROIs was calculated.
    方法 本组 3 1例病人行PWI ,绘制出灶周区和对侧对称区的信号强度 时间曲线 ,计算两兴趣区最大信号强度下降百分比、相对脑血流容积 (rCBV)之比值Q。
    Methods 16 health subjects and 42 patients with gliomas were recuited into this study. PWI was performed with SE EPI or GE EPI, image quality was observed, and the perfusion data were deconvoluted to calculate maximum signal reduction ratio (SRR max ) of white matter and relative regional cerebral blood volume (rrCBV) of gliomas.
    方法  16例健康自愿者和 42例胶质瘤患者 ,以SE EPI或GE EPI序列进行灌注成像 ,观察图像的质量 ,计算正常脑组织的最大信号强度下降百分比 (SRRmax)和肿瘤的相对局部脑血流容积 (rrCBV)。
    The maximum signal intensity of pituitary microadenomas appeared after 32、96 seconds that contrast medium had been injected and the manifestation was the most obvious in the 64th second.
    垂体微腺瘤的最大信号强度多出现在注入造影剂后 3 2~ 96s ,以 64s最明显。
    Results In the early-phase enhancement parameters of dynamic contrast-enhanced MRI, onset time,maximum signal intensity, and early-phase enhancement rate differed between prostatic cancer and BPH(P<0.01, 0.05, 0.01), but there were some overlaps between them. The intermediate and late post-contrast periods were characterized with the lesion SI-T curves.
    结果 前列腺癌MRI动态增强的早期强化参数开始时间、最大信号强度及早期强化率与BPH不同 (P分别为 <0 0 1、0 0 5、0 0 1 ) ,但两者之间有部分重叠。
    In 33 patients with pituitary microadenomas of all the 36 cases the tumor was round or eliptical low or slightly low signal which appeared liked filling defect the maximum signal intensity of pituitary microadenomas appeared at 32 to 96 seconds after the injection of contrast medium the manifestation was most obvious at 64th second.
    同层动态增强后,33例垂体微腺瘤的MRI表现为:圆形或椭圆形的低或稍低信号,似“充盈缺损”; 垂体微腺瘤的最大信号强度,多出现在注入造影剂后32~96s,以64s最明显。
    Materials and Methods 32 patients with prostatic cancer histopathologically verified were underwent dynamic contrast-enhanced RMI. 40 patients proved to be benign prostatic hyperplasia(BPH) were performed with dynamic contrast-enhanced MRI as control group. The results of dynamic contrast-enhanced MRI were evaluated by enhancement parameters including onset time, maximum signal intensity and early-phase enhancement rate.
    资料与方法对32例前列腺癌患者进行MRI动态增强扫描,设立40例良性前列腺增生(BPH)患者进行对照,观察病灶的动态增强MRI的强化参数:开始时间、最大信号强度及早期强化率,获得感兴趣区的病理标本,进行免疫组织化学MVD的测定,比较分析前列腺癌和BPH的动态增强参数、两者的MVD和PSA的相关关系。
    the maximum signal intensity of pituitary microadenomas was appeared after 32~96 seconds that contrast medium had been injected and the manifestation was most obvious in the 64th second.
    垂体微腺瘤的最大信号强度,多出现在注入对比剂后32-96s,以64s最明显。
 

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