2014
DOI: 10.3174/ajnr.a4114
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Diffusion-Weighted Imaging of the Head and Neck in Healthy Subjects: Reproducibility of ADC Values in Different MRI Systems and Repeat Sessions

Abstract: BACKGROUND AND PURPOSE:DWI is typically performed with EPI sequences in single-center studies. The purpose of this study was to determine the reproducibility of ADC values in the head and neck region in healthy subjects. In addition, the reproducibility of ADC values in different tissues was assessed to identify the most suitable reference tissue.

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Cited by 68 publications
(42 citation statements)
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“…Hence studies assessing reproducibility of head and neck tissue [126,147,148] were also included in this review. Some studies used vendorindependent post-processing software packages to compute the ADC maps [56,125,126,137,140,148] while others used site-specific software packages either vendorspecific or locally developed [68,138,141,147] . Although some investigators demonstrated high variability in the measured ADC (27.1% for left liver lobe) with vendorindependent software packages [56] , others found less variability in the measured ADC using vendor-specific software [148] .…”
Section: Discussionmentioning
confidence: 99%
“…Hence studies assessing reproducibility of head and neck tissue [126,147,148] were also included in this review. Some studies used vendorindependent post-processing software packages to compute the ADC maps [56,125,126,137,140,148] while others used site-specific software packages either vendorspecific or locally developed [68,138,141,147] . Although some investigators demonstrated high variability in the measured ADC (27.1% for left liver lobe) with vendorindependent software packages [56] , others found less variability in the measured ADC using vendor-specific software [148] .…”
Section: Discussionmentioning
confidence: 99%
“…The mean ADC of the pons (1.12-1.14 ×10 -3 mm 2 /s) calculated in our study was also higher than the mean ADC value established for pons (0.7 ×10 -3 mm 2 ). It has been previously reported that non-echoplanar DWI techniques yield different ADC values than echoplanar techniques (33).…”
Section: Discussionmentioning
confidence: 99%
“…In a given magnetic field a higher b value will result in a lower ADC. Another factor is variation in MRI scanners; a phantom study has shown that ADC values varied significantly across different MRI systems (27). Furthermore, the surrounding structure may also influence the ADC measurements, which is why multiple measurements were performed in our study to increase the accuracy.…”
Section: Discussionmentioning
confidence: 99%