Intravoxel incoherent motion modeling in the kidneys: Comparison of mono-, bi-, and triexponential fit

Sophie Jacobine van Baalen, Alexander Leemans, Pieter Dik, Marc R. Lilien, Bernard ten Haken, Martijn Froeling

Research output: Contribution to journalArticleAcademicpeer-review

16 Citations (Scopus)
55 Downloads (Pure)

Abstract

Purpose To evaluate if a three-component model correctly describes the diffusion signal in the kidney and whether it can provide complementary anatomical or physiological information about the underlying tissue. Materials and Methods Ten healthy volunteers were examined at 3T, with T2-weighted imaging, diffusion tensor imaging (DTI), and intravoxel incoherent motion (IVIM). Diffusion tensor parameters (mean diffusivity [MD] and fractional anisotropy [FA]) were obtained by iterative weighted linear least squares fitting of the DTI data and mono-, bi-, and triexponential fit parameters (D1, D2, D3, ffast2, ffast3, and finterm) using a nonlinear fit of the IVIM data. Average parameters were calculated for three regions of interest (ROIs) (cortex, medulla, and rest) and from fiber tractography. Goodness of fit was assessed with adjusted R2 ( inline image) and the Shapiro-Wilk test was used to test residuals for normality. Maps of diffusion parameters were also visually compared. Results Fitting the diffusion signal was feasible for all models. The three-component model was best able to describe fast signal decay at low b values (b < 50), which was most apparent in inline image of the ROI containing high diffusion signals (ROIrest), which was 0.42 ± 0.14, 0.61 ± 0.11, 0.77 ± 0.09, and 0.81 ± 0.08 for DTI, one-, two-, and three-component models, respectively, and in visual comparison of the fitted and measured S0. None of the models showed significant differences (P > 0.05) between the diffusion constant of the medulla and cortex, whereas the ffast component of the two and three-component models were significantly different (P < 0.001). Conclusion Triexponential fitting is feasible for the diffusion signal in the kidney, and provides additional information.
Original languageEnglish
Pages (from-to)228-239
JournalJournal of magnetic resonance imaging
Volume46
Issue number1
DOIs
Publication statusPublished - Jul 2017

Fingerprint

Kidney
Diffusion Tensor Imaging
Anisotropy
Least-Squares Analysis
Healthy Volunteers

Keywords

  • IR-101881
  • METIS-318415

Cite this

van Baalen, Sophie Jacobine ; Leemans, Alexander ; Dik, Pieter ; Lilien, Marc R. ; ten Haken, Bernard ; Froeling, Martijn. / Intravoxel incoherent motion modeling in the kidneys: Comparison of mono-, bi-, and triexponential fit. In: Journal of magnetic resonance imaging. 2017 ; Vol. 46, No. 1. pp. 228-239.
@article{adc2afc9b38e45debd65a901f7c39efd,
title = "Intravoxel incoherent motion modeling in the kidneys: Comparison of mono-, bi-, and triexponential fit",
abstract = "Purpose To evaluate if a three-component model correctly describes the diffusion signal in the kidney and whether it can provide complementary anatomical or physiological information about the underlying tissue. Materials and Methods Ten healthy volunteers were examined at 3T, with T2-weighted imaging, diffusion tensor imaging (DTI), and intravoxel incoherent motion (IVIM). Diffusion tensor parameters (mean diffusivity [MD] and fractional anisotropy [FA]) were obtained by iterative weighted linear least squares fitting of the DTI data and mono-, bi-, and triexponential fit parameters (D1, D2, D3, ffast2, ffast3, and finterm) using a nonlinear fit of the IVIM data. Average parameters were calculated for three regions of interest (ROIs) (cortex, medulla, and rest) and from fiber tractography. Goodness of fit was assessed with adjusted R2 ( inline image) and the Shapiro-Wilk test was used to test residuals for normality. Maps of diffusion parameters were also visually compared. Results Fitting the diffusion signal was feasible for all models. The three-component model was best able to describe fast signal decay at low b values (b < 50), which was most apparent in inline image of the ROI containing high diffusion signals (ROIrest), which was 0.42 ± 0.14, 0.61 ± 0.11, 0.77 ± 0.09, and 0.81 ± 0.08 for DTI, one-, two-, and three-component models, respectively, and in visual comparison of the fitted and measured S0. None of the models showed significant differences (P > 0.05) between the diffusion constant of the medulla and cortex, whereas the ffast component of the two and three-component models were significantly different (P < 0.001). Conclusion Triexponential fitting is feasible for the diffusion signal in the kidney, and provides additional information.",
keywords = "IR-101881, METIS-318415",
author = "{van Baalen}, {Sophie Jacobine} and Alexander Leemans and Pieter Dik and Lilien, {Marc R.} and {ten Haken}, Bernard and Martijn Froeling",
note = "Open access. Online Version of Record published before inclusion in an issue",
year = "2017",
month = "7",
doi = "10.1002/jmri.25519",
language = "English",
volume = "46",
pages = "228--239",
journal = "Journal of magnetic resonance imaging",
issn = "1053-1807",
publisher = "Wiley",
number = "1",

}

Intravoxel incoherent motion modeling in the kidneys: Comparison of mono-, bi-, and triexponential fit. / van Baalen, Sophie Jacobine; Leemans, Alexander; Dik, Pieter; Lilien, Marc R.; ten Haken, Bernard; Froeling, Martijn.

In: Journal of magnetic resonance imaging, Vol. 46, No. 1, 07.2017, p. 228-239.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Intravoxel incoherent motion modeling in the kidneys: Comparison of mono-, bi-, and triexponential fit

AU - van Baalen, Sophie Jacobine

AU - Leemans, Alexander

AU - Dik, Pieter

AU - Lilien, Marc R.

AU - ten Haken, Bernard

AU - Froeling, Martijn

N1 - Open access. Online Version of Record published before inclusion in an issue

PY - 2017/7

Y1 - 2017/7

N2 - Purpose To evaluate if a three-component model correctly describes the diffusion signal in the kidney and whether it can provide complementary anatomical or physiological information about the underlying tissue. Materials and Methods Ten healthy volunteers were examined at 3T, with T2-weighted imaging, diffusion tensor imaging (DTI), and intravoxel incoherent motion (IVIM). Diffusion tensor parameters (mean diffusivity [MD] and fractional anisotropy [FA]) were obtained by iterative weighted linear least squares fitting of the DTI data and mono-, bi-, and triexponential fit parameters (D1, D2, D3, ffast2, ffast3, and finterm) using a nonlinear fit of the IVIM data. Average parameters were calculated for three regions of interest (ROIs) (cortex, medulla, and rest) and from fiber tractography. Goodness of fit was assessed with adjusted R2 ( inline image) and the Shapiro-Wilk test was used to test residuals for normality. Maps of diffusion parameters were also visually compared. Results Fitting the diffusion signal was feasible for all models. The three-component model was best able to describe fast signal decay at low b values (b < 50), which was most apparent in inline image of the ROI containing high diffusion signals (ROIrest), which was 0.42 ± 0.14, 0.61 ± 0.11, 0.77 ± 0.09, and 0.81 ± 0.08 for DTI, one-, two-, and three-component models, respectively, and in visual comparison of the fitted and measured S0. None of the models showed significant differences (P > 0.05) between the diffusion constant of the medulla and cortex, whereas the ffast component of the two and three-component models were significantly different (P < 0.001). Conclusion Triexponential fitting is feasible for the diffusion signal in the kidney, and provides additional information.

AB - Purpose To evaluate if a three-component model correctly describes the diffusion signal in the kidney and whether it can provide complementary anatomical or physiological information about the underlying tissue. Materials and Methods Ten healthy volunteers were examined at 3T, with T2-weighted imaging, diffusion tensor imaging (DTI), and intravoxel incoherent motion (IVIM). Diffusion tensor parameters (mean diffusivity [MD] and fractional anisotropy [FA]) were obtained by iterative weighted linear least squares fitting of the DTI data and mono-, bi-, and triexponential fit parameters (D1, D2, D3, ffast2, ffast3, and finterm) using a nonlinear fit of the IVIM data. Average parameters were calculated for three regions of interest (ROIs) (cortex, medulla, and rest) and from fiber tractography. Goodness of fit was assessed with adjusted R2 ( inline image) and the Shapiro-Wilk test was used to test residuals for normality. Maps of diffusion parameters were also visually compared. Results Fitting the diffusion signal was feasible for all models. The three-component model was best able to describe fast signal decay at low b values (b < 50), which was most apparent in inline image of the ROI containing high diffusion signals (ROIrest), which was 0.42 ± 0.14, 0.61 ± 0.11, 0.77 ± 0.09, and 0.81 ± 0.08 for DTI, one-, two-, and three-component models, respectively, and in visual comparison of the fitted and measured S0. None of the models showed significant differences (P > 0.05) between the diffusion constant of the medulla and cortex, whereas the ffast component of the two and three-component models were significantly different (P < 0.001). Conclusion Triexponential fitting is feasible for the diffusion signal in the kidney, and provides additional information.

KW - IR-101881

KW - METIS-318415

U2 - 10.1002/jmri.25519

DO - 10.1002/jmri.25519

M3 - Article

VL - 46

SP - 228

EP - 239

JO - Journal of magnetic resonance imaging

JF - Journal of magnetic resonance imaging

SN - 1053-1807

IS - 1

ER -