论文部分内容阅读
目的 评价屏气下T2 WIHASTE与HASTE IR序列对肝癌的检测能力。材料与方法 6 2例肝脏肿瘤患者进行了屏气下HASTE和HASTE IR序列T2 WI。同一层面的成像采用上述 2种序列进行分析 ,记录平均信号强度和标准差。肝脏、脾脏及肿瘤的信噪比 (SNR)和相对对比噪声比 (rCNR)通过除以背景噪声的标准差后进行统计学分析。结果 HASTE IR序列显示病灶与肝实质的对比度高 ,图像清晰。肿瘤 /肝实质和脾脏 /肝实质的rCNR分别为HASTE IR序列 :1.2 1± 0 .2 4,1.74± 0 .2 5 ;HASTE序列 :0 .71±0 .0 7,0 .75± 0 .18,两者之间有显著性差异 (t=1.94,2 .35 ;P =0 .0 3 <0 .0 5 )。另外 ,HASTE IR序列发现了 12个 (19.4% )HASTE序列无法显示的小病灶。结论 屏气下HASTE IR序列和HASTE序列对肝脏实质性病灶均具有较高的敏感性 ,但前者显示肿瘤 /肝实质的rCNR明显高于后者 ,可以作为常规成像方式之一
Objective To evaluate the detection of hepatocellular carcinoma (T2WHASTE) and HASTE (IR) sequences under breath-holding conditions. MATERIALS AND METHODS Sixty-two patients with liver tumors underwent breath-hold HASTE and HASTE IR sequence T2 WI. The same level of imaging using the above two kinds of sequence analysis, record the average signal strength and standard deviation. Signal-to-noise ratio (SNR) and relative contrast-to-noise ratio (rCNR) of liver, spleen and tumor were statistically analyzed by dividing by the standard deviation of background noise. Results The HASTE IR sequence showed high contrast between the lesion and the liver parenchyma and a clear image. The rCNRs of tumor / liver parenchyma and spleen / liver parenchyma were respectively HASTE IR sequence: 1.2 1 ± 0.24,1.74 ± 0.52; HASTE sequence: 0 .71 ± 0 .0 7,0 .75 ± 0. 18, there was a significant difference between the two (t = 1.94, 2.35; P = 0.30 <0.05). In addition, 12 (19.4%) HASTE IR sequences revealed small lesions that could not be seen with HASTE sequences. Conclusions Both HASTE IR sequence and HASTE sequence are highly sensitive to substantial liver lesions. However, the former shows that the rCNR of the tumor / liver parenchyma is significantly higher than that of the latter and can be used as one of the conventional imaging modalities