scholarly journals Repeatability of Apparent Diffusion Coefficient at 3.0 Tesla in Normal Pancreas

Cureus ◽  
2021 ◽  
Author(s):  
Shiyue Chen ◽  
Ri Liu ◽  
Chao Ma ◽  
Yun Bian ◽  
Jing Li ◽  
...  
Keyword(s):  
Diffusion Coefficient ◽  
Apparent Diffusion Coefficient ◽  
Normal Pancreas ◽  
3.0 Tesla ◽  
Apparent Diffusion

scholarly journals Repeatability of apparent diffusion coefficient and intravoxel incoherent motion parameters at 3.0 Tesla in orbital lesions

2017 ◽  
Vol 27 (12) ◽  
pp. 5094-5103 ◽  
Author(s):  
Augustin Lecler ◽  
Julien Savatovsky ◽  
Daniel Balvay ◽  
Mathieu Zmuda ◽  
Jean-Claude Sadik ◽  
...  
Keyword(s):  
Diffusion Coefficient ◽  
Apparent Diffusion Coefficient ◽  
Intravoxel Incoherent Motion ◽  
3.0 Tesla ◽  
Apparent Diffusion ◽  
Motion Parameters ◽  
Orbital Lesions

scholarly journals Diffusion-weighted imaging in normal pancreas: Apparent diffusion coefficient test-retest repeatability

2019 ◽  
Author(s):  
Shiyue Chen ◽  
Ri Liu ◽  
Chao Ma ◽  
Yun Bian ◽  
Jing Li ◽  
...  
Keyword(s):  
Diffusion Coefficient ◽  
Apparent Diffusion Coefficient ◽  
Diffusion Weighted Imaging ◽  
Pancreatic Head ◽  
Mean Difference ◽  
Normal Pancreas ◽  
Limits Of Agreement ◽  
Adc Test ◽  
Apparent Diffusion ◽  
Adc Values

Abstract Background The assessment of apparent diffusion coefficient (ADC) repeatability is important to body diffusion weighted imaging (DWI). However, data onto evaluating the repeatability of ADC values for normal pancreas are limited. The aim of this study was to evaluate the ADC test-retest repeatability of the normal pancreas.Methods Twenty-six healthy volunteers (mean 47.6 years; 13 men) were included and scanned twice with reposition using a DWI sequence at 3.0-T. ADCs of the pancreatic head, body and tail for two DWIs were measured by two readers. The mean ADCs of the pancreatic head, body and tail were calculated as the global pancreatic ADC. Test-retest repeatability and agreement of ADC measurement were evaluated by the Bland-Altman analysis, intra-class correlation coefficient (ICC) and coefficient of variation (CV).Results The global pancreatic ADC showed the best test-retest repeatability (mean difference ± limits of agreement were 0.05 ± 0.25×10 -3 mm 2 /s; ICC, 0.79; CV, 6%). Test-retest repeatabilities for ADC of pancreatic head, body or tail were scattered, with mean difference ± limits of agreement between two tests were 0.03 ± 0.47, 0.05 ± 0.42 and 0.06 ± 0.31 (×10 -3 mm 2 /s), respectively (ICCs, 0.81, 0.52 and 0.68; CVs, 9%, 8% and 8%). Both intra-observer repeatability and inter-observer reproducibility were acceptable for whole pancreas between ADC measurements of the two DWIs.Conclusions ADC values of the pancreas are technically challenging and repeatability is variable. Cautions should be taken when interpreting longitudinal clinical changes in ADC values of the normal pancreas because the measurements do have an inherent variability by locations.

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