Diffusion-weighted magnetic resonance imaging in the depiction of gastric cancer: initial experience

被引:12
作者
Tang, Lei [1 ]
Sun, Ying-Shi [1 ]
Li, Zi-Yu [2 ]
Cao, Kun [1 ]
Zhang, Xiao-Yan [1 ]
Li, Xiao-Ting [1 ]
Ji, Jia-Fu [2 ]
机构
[1] Peking Univ Canc Hosp & Inst, Minist Educ, Key Lab Carcinogenesis & Translat Res, Dept Radiol, 52 Fu Cheng Rd, Beijing 100142, Peoples R China
[2] Peking Univ Canc Hosp & Inst, Minist Educ, Key Lab Carcinogenesis & Translat Res, Dept Gastrointestinal Surg, 52 Fu Cheng Rd, Beijing 100142, Peoples R China
基金
中国国家自然科学基金;
关键词
Stomach neoplasms; Diffusion-weighted imaging; Magnetic resonance imaging; Apparent diffusion coefficient; Reproducibility; CARCINOMA; PERFUSION; TUMOR; NODE; MRI;
D O I
10.1007/s00261-015-0594-6
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
The aim of the study was to explore the feasibility of diffusion-weighted magnetic resonance imaging (DW-MRI) in the depiction of gastric cancer and to investigate the signal characteristics and apparent diffusion coefficient (ADC) of gastric cancer. An institutional review board-approved protocol was developed for this prospective study. DW-MRI was performed on 101 patients with gastric cancer that was detected by gastroscopy biopsy. The optimal number of excitations (NEX) for DW-MRI was determined, and the signal characteristics of gastric cancer on DW-MRI were analyzed. The ADC of gastric cancer was measured by two experienced radiologists independently, and the reproducibility of measurement was investigated by the Bland-Altman analysis. When DW-MRI was used with four NEXs, areas of gastric cancer showed a good contrast and contrast-to-noise ratio. Four kinds of signal characteristics of gastric cancer were observed on DW-MRI: uniformly high signal, inner high signal, and outer low signal (two-layer type), high-low- high signal (three-layer sandwich type), and mixed type. The mean ADC of gastric cancer measured by two observers was (1.18 +/- 0.29) 9 10(-3) mm(2)/s and (1.20 +/- 0.31) x 10(-3) mm(2)/s respectively, which showed good agreement with Bland-Altman analysis (95% limits of agreement: -0.16 to +0.19 x 10(-3) mm(2)/s). Gastric cancers have various signal characteristics on DW-MRI and the reproducibility of ADC measurement is satisfactory. DW-MRI is helpful in the depiction of gastric cancer.
引用
收藏
页码:2 / 9
页数:8
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