MR influence of different magnetic field and different scanner with same magnetic field on apparent diffusion coefficient of abdominal organs in healthy volunteers
10.3760/cma.j.issn.1005-1201.2013.02.010
- VernacularTitle:MR场强及设备类型对健康人腹部实质脏器表观扩散系数值的影响
- Author:
Jiayin GAO
;
Jiacheng ZHANG
;
Zhenghan YANG
;
Jinning LI
;
Min CHEN
;
Cheng ZHOU
- Publication Type:Journal Article
- Keywords:
Abdomen;
Diffusion magnetic resonance imaging;
Reproducibility of results
- From:
Chinese Journal of Radiology
2013;(2):142-146
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the reproducibility of ADC measurements at 1.5 vs 3.0 T and at 1.5 T of different scanners in liver,spleen and pancreas of healthy volunteers.Methods Abdominal DWI were performed on 33 healthy volunteers by using GE 1.5 T,Siemens 1.5 T and Philips 3.0 T MR scanners.The mean ADC values of liver,spleen,pancreatic head,body,and tail were calculated.The ADC data were analyzed by using paired-sample t tests.Results The mean ADC of liver at GE 1.5 T,Siemens 1.5T and Philips 3.0 T were (1.56 ±0.10) ×10-3,(1.67 ±0.15) ×10-3 and(1.35 ±0.12) ×10-3 mm2/s,spleen were (0.96±0.10) × 10 3,(0.98 ±0.11) ×10-3and(0.81 ±0.14) × 10-3 mm2/s,pancreatic head were (2.09 ± 0.27) × 10-3,(2.20 ± 0.21) × 10-3 and (2.05 ± 0.27) × 10-3 mm2/s,pancreatic body were (2.03 ± 0.27) × 10-3,(2.09 ± 0.30) × 10-3 and (1.76 ± 0.25) × 10-3 mm2/s,pancreatic tail were (1.88 ± 0.28) × 10-3,(1.88 ± 0.27) × 10-3 and (1.56 ± 0.27) × 10-3 mm2/s,respectively.From the aspect of different field strength MR scanners,there were significant differences in mean ADC of liver (t =11.073,P ＜0.01 in GE 1.5 T vs Philips 3.0 T; t =12.795,P ＜0.01 in Siemens 1.5 T vs Philips 3.0 T),spleen (t =4.143,P ＜ 0.01 in GE 1.5 T vs Philips 3.0 T; t =5.376,P ＜ 0.01 in Siemens 1.5 T vs Philips 3.0 T),pancreatic body (t =4.677,P ＜ 0.01 in GE 1.5 T vs Philips 3.0 T; t =5.174,P ＜0.01 in Siemens 1.5 T vs Philips 3.0 T) and tail (t =5.356,P ＜0.01 in GE 1.5 T vs Philips 3.0 T; t =4.648,P ＜0.01 in Siemens 1.5 T vs Philips 3.0 T),but there were no significant differences in mean ADC of pancreatic head (t =0.340,P ＞ 0.05 in GE 1.5 T vs Philips 3.0 T; t =1.349,P ＞ 0.05 in Siemens 1.5 T vs Philips3.0 T).From the aspect of different 1.5 T MR scanners,there were significant differences in mean ADC of liver (t =-4.563,P ＜ 0.01),but there were no significant differences in mean ADC of spleen (t =-0.732,P ＞ 0.05),pancreatic head (t =-0.879,P ＞ 0.05),body (t =-1.020,P ＞0.05) and tail (t =0.054,P ＞ 0.05).Conclusion Between 1.5 T and 3.0 T MR scanners,there were significant differences in mean ADC of liver,spleen,pancreatic body and tail,but there were no significant differences in mean ADC of pancreatic head.At different 1.5 T MR scanners,there were significant differences in mean ADC of liver,but there were no significant differences in mean ADC of spleen,pancreatic head,body and tail.
