Comparisons of Image Quality and ADCs in Breath-Hold, Respiratory-Triggered and Free-Breathing DWI of Pancreas at 3-TReportar como inadecuado




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Objective: To compare image quality and apparent diffusion coefficients ADC of the normal pancreas parenchymas in breath-hold, respiratory-triggered and free-breathing diffusion weighted imaging DWI at 3.0-Tesla. Methods: DWI of the pancreas was performed at 3.0-Tesla in 21 healthy volunteers with breath-hold, respiratory-triggered and free-breathing using b-values of 0 and 500 s-mm2. For all three sequences, two readers assigned an image quality score to images at b0 and b500, and two independent readers measured ADCs for the head, body and tail of pancreas. Image quality scores and ADCs of pancreas in the three DWIs were compared. Results: For b0, image quality scores was not significantly different among the three sequences p = 0.103. For b500, image quality score was significantly lower in free-breathing DWI than breath-hold or respiratory-triggered DWI p = 0.000, and not significantly different between breath-hold and respiratory-triggered DWI p = 0.212. Mean ADCs differed significantly among the anatomical regions with the lowest values measured in the pancreatic tail both at breath-hold and respiratory-triggered DWIs whereas no significant difference was found at free-breathing DWI. Conclusion: Breath-hold or respiratory-triggered technique provided DW images of pancreas with acceptable quality at 3.0-Tesla. Breath-hold is the preferred DWI technique for ADC measurements of pancreas.

KEYWORDS

DWI, ADC, Breath-Hold, Respiratory-Triggered, Free-Breathing, Pancreas

Cite this paper

Ma, C. , Wang, J. , Li, Y. , Pan, C. , Zhang, Y. , Wang, H. , Chen, S. and Lu, J. 2014 Comparisons of Image Quality and ADCs in Breath-Hold, Respiratory-Triggered and Free-Breathing DWI of Pancreas at 3-T. Open Journal of Radiology, 4, 279-292. doi: 10.4236-ojrad.2014.44037.





Autor: Chao Ma1, Jian Wang1, Yan-Jun Li1, Chun-Shu Pan1, Yong Zhang2, He Wang2, Shi-Yue Chen1, Jian-Ping Lu1

Fuente: http://www.scirp.org/



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