Value of diffusion-weighted MRI for assessing liver fibrosis and cirrhosis

Kumar Sandrasegaran, M. Akisik, Chen Lin, Bilal Tahir, Janaki Rajan, Romil Saxena, Alex M. Aisen

Research output: Contribution to journalArticle

139 Citations (Scopus)

Abstract

OBJECTIVE. The objective of our study was to determine the usefulness of the apparent diffusion coefficient (ADC) of liver parenchyma for determining the severity of liver fibrosis. MATERIALS AND METHODS. This study investigated 78 patients who underwent diffusion-weighted imaging (DWI) with 1.5-T MRI and pathologic staging of liver fibrosis based on biopsy. DWI was performed with b values of 50 and 400 s/mm2. ADCs of liver were measured using 2.0- to 3.0-cm2 regions of interest in the right and left lobes of the liver; the mean ADC value was used for analysis. Pathologic METAVIR scores for liver fibrosis stage were used as a reference standard. RESULTS. The mean ADC values for fibrosis pathologically staged using the METAVIR classification system as F0 (n = 11), F1 (n = 16), F2 (n = 10), F3 (n = 14), and F4 (n = 27) were 125.9, 105.0, 104.5, 103.2, and 99.1 x 10-5 s/mm2, respectively. The correlation between the ADC values and the degree of liver fibrosis was moderate (Spearman's test, ? = -0.36). There was a significant difference in ADC values between patients with nonfibrotic liver (F0) and those with cirrhotic liver (F4) (p = 0.008). The best cutoff ADC value to distinguish between these groups was 118 x 10-5 s/mm2. However, ADC values were not useful for differentiating viral hepatitis patients with F2 fibrosis or higher from those with a lower degree of fibrosis (area under the receiver operating characteristic curve [AUC] = 0.66) or for differentiating low-stage fibrosis in all patients from high-stage fibrosis in all patients (AUC = 0.54). CONCLUSION. The ADCs in cirrhotic livers are significantly lower than those in non-fibrotic livers. However, ADC values measured using the current generation of scanners are not reliable enough to replace liver biopsy for staging hepatic fibrosis.

Original languageEnglish
Pages (from-to)1556-1560
Number of pages5
JournalAmerican Journal of Roentgenology
Volume193
Issue number6
DOIs
StatePublished - Dec 2009

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Diffusion Magnetic Resonance Imaging
Liver Cirrhosis
Liver
Fibrosis
Area Under Curve
Biopsy
ROC Curve
Hepatitis

Keywords

  • Apparent diffusion coefficient
  • Cirrhosis
  • Diffusion-weighted imaging
  • Liver fibrosis
  • MRI

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Cite this

Value of diffusion-weighted MRI for assessing liver fibrosis and cirrhosis. / Sandrasegaran, Kumar; Akisik, M.; Lin, Chen; Tahir, Bilal; Rajan, Janaki; Saxena, Romil; Aisen, Alex M.

In: American Journal of Roentgenology, Vol. 193, No. 6, 12.2009, p. 1556-1560.

Research output: Contribution to journalArticle

Sandrasegaran, Kumar ; Akisik, M. ; Lin, Chen ; Tahir, Bilal ; Rajan, Janaki ; Saxena, Romil ; Aisen, Alex M. / Value of diffusion-weighted MRI for assessing liver fibrosis and cirrhosis. In: American Journal of Roentgenology. 2009 ; Vol. 193, No. 6. pp. 1556-1560.
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AU - Sandrasegaran, Kumar

AU - Akisik, M.

AU - Lin, Chen

AU - Tahir, Bilal

AU - Rajan, Janaki

AU - Saxena, Romil

AU - Aisen, Alex M.

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N2 - OBJECTIVE. The objective of our study was to determine the usefulness of the apparent diffusion coefficient (ADC) of liver parenchyma for determining the severity of liver fibrosis. MATERIALS AND METHODS. This study investigated 78 patients who underwent diffusion-weighted imaging (DWI) with 1.5-T MRI and pathologic staging of liver fibrosis based on biopsy. DWI was performed with b values of 50 and 400 s/mm2. ADCs of liver were measured using 2.0- to 3.0-cm2 regions of interest in the right and left lobes of the liver; the mean ADC value was used for analysis. Pathologic METAVIR scores for liver fibrosis stage were used as a reference standard. RESULTS. The mean ADC values for fibrosis pathologically staged using the METAVIR classification system as F0 (n = 11), F1 (n = 16), F2 (n = 10), F3 (n = 14), and F4 (n = 27) were 125.9, 105.0, 104.5, 103.2, and 99.1 x 10-5 s/mm2, respectively. The correlation between the ADC values and the degree of liver fibrosis was moderate (Spearman's test, ? = -0.36). There was a significant difference in ADC values between patients with nonfibrotic liver (F0) and those with cirrhotic liver (F4) (p = 0.008). The best cutoff ADC value to distinguish between these groups was 118 x 10-5 s/mm2. However, ADC values were not useful for differentiating viral hepatitis patients with F2 fibrosis or higher from those with a lower degree of fibrosis (area under the receiver operating characteristic curve [AUC] = 0.66) or for differentiating low-stage fibrosis in all patients from high-stage fibrosis in all patients (AUC = 0.54). CONCLUSION. The ADCs in cirrhotic livers are significantly lower than those in non-fibrotic livers. However, ADC values measured using the current generation of scanners are not reliable enough to replace liver biopsy for staging hepatic fibrosis.

AB - OBJECTIVE. The objective of our study was to determine the usefulness of the apparent diffusion coefficient (ADC) of liver parenchyma for determining the severity of liver fibrosis. MATERIALS AND METHODS. This study investigated 78 patients who underwent diffusion-weighted imaging (DWI) with 1.5-T MRI and pathologic staging of liver fibrosis based on biopsy. DWI was performed with b values of 50 and 400 s/mm2. ADCs of liver were measured using 2.0- to 3.0-cm2 regions of interest in the right and left lobes of the liver; the mean ADC value was used for analysis. Pathologic METAVIR scores for liver fibrosis stage were used as a reference standard. RESULTS. The mean ADC values for fibrosis pathologically staged using the METAVIR classification system as F0 (n = 11), F1 (n = 16), F2 (n = 10), F3 (n = 14), and F4 (n = 27) were 125.9, 105.0, 104.5, 103.2, and 99.1 x 10-5 s/mm2, respectively. The correlation between the ADC values and the degree of liver fibrosis was moderate (Spearman's test, ? = -0.36). There was a significant difference in ADC values between patients with nonfibrotic liver (F0) and those with cirrhotic liver (F4) (p = 0.008). The best cutoff ADC value to distinguish between these groups was 118 x 10-5 s/mm2. However, ADC values were not useful for differentiating viral hepatitis patients with F2 fibrosis or higher from those with a lower degree of fibrosis (area under the receiver operating characteristic curve [AUC] = 0.66) or for differentiating low-stage fibrosis in all patients from high-stage fibrosis in all patients (AUC = 0.54). CONCLUSION. The ADCs in cirrhotic livers are significantly lower than those in non-fibrotic livers. However, ADC values measured using the current generation of scanners are not reliable enough to replace liver biopsy for staging hepatic fibrosis.

KW - Apparent diffusion coefficient

KW - Cirrhosis

KW - Diffusion-weighted imaging

KW - Liver fibrosis

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