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Inter-study reproducibility of interleaved spiral phase velocity mapping of renal artery haemodynamics

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Renal resistive index (RI) and pulsatility index (PI) are reliable measures of downstream renal resistance which correlate with the severity of renal disease... Inter-observer and inter-study reproducibility of RI, PI and renal artery blood flow (RABF) per kidney were determined as the mean (+/- standard deviation) of the paired differences between observers and between scanning sessions and by the intraclass correlation coefficient (ICC)... RI, PI and RABF per kidney were 0.71+/- 0.06, 1.47 +/- 0.29 and 413 +/- 122 ml/min respectively... Inter-observer and inter-study Bland Alman plots are shown in Figure 2... The inter-study reproducibilities were: RI -0.00 +/- 0.04, PI -0.03 +/- 0.17, and RABF per kidney 17.9 +/- 44.8 ml/min... Inter-study ICCs (observers 1 and 2 respectively) were 0.87 and 0.86 (RI), 0.92 and 0.93 (PI) and 0.96 and 0.95 (RABF)... The effect of background phase correction was negligible (<2% for each parameter)... High temporal resolution breath-hold spiral phase velocity mapping allows reproducible assessment of renal pulsatility indices and RABF... We conclude that this technique is suitable for studying temporal flow velocity patterns in the renal arteries.

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Inter-observer (a) and inter-study (b) Bland Altman plots of RI (resistive index), PI (pulsatility index) and RABF (renal artery blood flow) per kidney in 10 healthy volunteers. For each plot, the horizontal lines show the mean difference and the 95% limits of agreement (mean +/- 2SD) between observers (a) or between scanning sessions (b).
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Figure 2: Inter-observer (a) and inter-study (b) Bland Altman plots of RI (resistive index), PI (pulsatility index) and RABF (renal artery blood flow) per kidney in 10 healthy volunteers. For each plot, the horizontal lines show the mean difference and the 95% limits of agreement (mean +/- 2SD) between observers (a) or between scanning sessions (b).

Mentions: Figure 1 shows example data. RI, PI and RABF per kidney were 0.71+/- 0.06, 1.47 +/- 0.29 and 413 +/- 122 ml/min respectively. Inter-observer and inter-study Bland Alman plots are shown in Figure 2. The inter-study reproducibilities were: RI -0.00 +/- 0.04 , PI -0.03 +/- 0.17, and RABF per kidney 17.9 +/- 44.8 ml/min. Inter-study ICCs (observers 1 and 2 respectively) were 0.87 and 0.86 (RI), 0.92 and 0.93 (PI) and 0.96 and 0.95 (RABF). The effect of background phase correction was negligible (<2% for each parameter).


Inter-study reproducibility of interleaved spiral phase velocity mapping of renal artery haemodynamics
Inter-observer (a) and inter-study (b) Bland Altman plots of RI (resistive index), PI (pulsatility index) and RABF (renal artery blood flow) per kidney in 10 healthy volunteers. For each plot, the horizontal lines show the mean difference and the 95% limits of agreement (mean +/- 2SD) between observers (a) or between scanning sessions (b).
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4328905&req=5

Figure 2: Inter-observer (a) and inter-study (b) Bland Altman plots of RI (resistive index), PI (pulsatility index) and RABF (renal artery blood flow) per kidney in 10 healthy volunteers. For each plot, the horizontal lines show the mean difference and the 95% limits of agreement (mean +/- 2SD) between observers (a) or between scanning sessions (b).
Mentions: Figure 1 shows example data. RI, PI and RABF per kidney were 0.71+/- 0.06, 1.47 +/- 0.29 and 413 +/- 122 ml/min respectively. Inter-observer and inter-study Bland Alman plots are shown in Figure 2. The inter-study reproducibilities were: RI -0.00 +/- 0.04 , PI -0.03 +/- 0.17, and RABF per kidney 17.9 +/- 44.8 ml/min. Inter-study ICCs (observers 1 and 2 respectively) were 0.87 and 0.86 (RI), 0.92 and 0.93 (PI) and 0.96 and 0.95 (RABF). The effect of background phase correction was negligible (<2% for each parameter).

View Article: PubMed Central - HTML

AUTOMATICALLY GENERATED EXCERPT
Please rate it.

Renal resistive index (RI) and pulsatility index (PI) are reliable measures of downstream renal resistance which correlate with the severity of renal disease... Inter-observer and inter-study reproducibility of RI, PI and renal artery blood flow (RABF) per kidney were determined as the mean (+/- standard deviation) of the paired differences between observers and between scanning sessions and by the intraclass correlation coefficient (ICC)... RI, PI and RABF per kidney were 0.71+/- 0.06, 1.47 +/- 0.29 and 413 +/- 122 ml/min respectively... Inter-observer and inter-study Bland Alman plots are shown in Figure 2... The inter-study reproducibilities were: RI -0.00 +/- 0.04, PI -0.03 +/- 0.17, and RABF per kidney 17.9 +/- 44.8 ml/min... Inter-study ICCs (observers 1 and 2 respectively) were 0.87 and 0.86 (RI), 0.92 and 0.93 (PI) and 0.96 and 0.95 (RABF)... The effect of background phase correction was negligible (<2% for each parameter)... High temporal resolution breath-hold spiral phase velocity mapping allows reproducible assessment of renal pulsatility indices and RABF... We conclude that this technique is suitable for studying temporal flow velocity patterns in the renal arteries.

No MeSH data available.