Liver lesions

Manganese-enhanced MR and dual-phase helical CT for preoperative detection and characterization - Comparison with receiver operating characteristic analysis

Helio J V Braga, Michael A. Choti, Vivian S. Lee, Erik K. Paulson, Evan S. Siegelman, David A. Bluemke

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

PURPOSE: The purpose of this study was to compare, by means of receiver operating characteristic (ROC) analysis, dual-phase helical computed tomography (CT) and manganese-enhanced magnetic resonance (MR) imaging in the detection and characterization of hepatic lesions in patients prior to surgery. MATERIALS AND METHODS: Twenty-five patients known to have or suspected of having hepatic lesions who were eligible for surgery underwent dual-phase (ie, arterial and portal phase) helical CT and phased-array MR imaging (ie, unenhanced fast spin-echo T2-weighted imaging and gradient-echo T1-weighted imaging performed before and after administration of mangafodipir trisodium). All images were reviewed independently by three off-site blinded reviewers who separately reviewed the CT scans and MR images. The standard of reference was findings at surgery, intraoperative ultrasonography (US), and histopathologic examination. ROC curves were established to analyze the results for each reader and modality. RESULTS: Ninety-four lesions (77 malignant and 17 benign) were revealed at surgery, intraoperative US, and/or histopathologic examination. The overall rate of lesion detection for the three readers at CT was 81.9% ± 7.8, 90.4% ± 5.9, and 76.6% ± 8.6. At MR imaging, the detection rates were 72.3% ± 9.0, 71.3% ± 9.1, and 69.1% ± 9.3 (P = .001 for the difference between MR and CT). The average rate of false-positive diagnoses in patients was 14.1% at CT and 6.4% at MR imaging (P = .06 for the difference between MR and CT). The mean areas under the alternative-free-response ROC curves were 0.74 for MR and 0.72 for CT (P = .751, not significant). CONCLUSION: In detection and characterization of liver lesions, manganese-enhanced MR imaging and dual-phase helical CT were not statistically different.

Original languageEnglish (US)
Pages (from-to)525-531
Number of pages7
JournalRadiology
Volume223
Issue number2
StatePublished - 2002

Fingerprint

Spiral Computed Tomography
Manganese
ROC Curve
Magnetic Resonance Spectroscopy
Tomography
Magnetic Resonance Imaging
Liver
Ultrasonography

Keywords

  • Liver neoplasms, CT
  • Liver neoplasms, MR
  • Magnetic resonance (MR), contrast media
  • Manganese

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology

Cite this

Liver lesions : Manganese-enhanced MR and dual-phase helical CT for preoperative detection and characterization - Comparison with receiver operating characteristic analysis. / Braga, Helio J V; Choti, Michael A.; Lee, Vivian S.; Paulson, Erik K.; Siegelman, Evan S.; Bluemke, David A.

In: Radiology, Vol. 223, No. 2, 2002, p. 525-531.

Research output: Contribution to journalArticle

Braga, Helio J V ; Choti, Michael A. ; Lee, Vivian S. ; Paulson, Erik K. ; Siegelman, Evan S. ; Bluemke, David A. / Liver lesions : Manganese-enhanced MR and dual-phase helical CT for preoperative detection and characterization - Comparison with receiver operating characteristic analysis. In: Radiology. 2002 ; Vol. 223, No. 2. pp. 525-531.
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abstract = "PURPOSE: The purpose of this study was to compare, by means of receiver operating characteristic (ROC) analysis, dual-phase helical computed tomography (CT) and manganese-enhanced magnetic resonance (MR) imaging in the detection and characterization of hepatic lesions in patients prior to surgery. MATERIALS AND METHODS: Twenty-five patients known to have or suspected of having hepatic lesions who were eligible for surgery underwent dual-phase (ie, arterial and portal phase) helical CT and phased-array MR imaging (ie, unenhanced fast spin-echo T2-weighted imaging and gradient-echo T1-weighted imaging performed before and after administration of mangafodipir trisodium). All images were reviewed independently by three off-site blinded reviewers who separately reviewed the CT scans and MR images. The standard of reference was findings at surgery, intraoperative ultrasonography (US), and histopathologic examination. ROC curves were established to analyze the results for each reader and modality. RESULTS: Ninety-four lesions (77 malignant and 17 benign) were revealed at surgery, intraoperative US, and/or histopathologic examination. The overall rate of lesion detection for the three readers at CT was 81.9{\%} ± 7.8, 90.4{\%} ± 5.9, and 76.6{\%} ± 8.6. At MR imaging, the detection rates were 72.3{\%} ± 9.0, 71.3{\%} ± 9.1, and 69.1{\%} ± 9.3 (P = .001 for the difference between MR and CT). The average rate of false-positive diagnoses in patients was 14.1{\%} at CT and 6.4{\%} at MR imaging (P = .06 for the difference between MR and CT). The mean areas under the alternative-free-response ROC curves were 0.74 for MR and 0.72 for CT (P = .751, not significant). CONCLUSION: In detection and characterization of liver lesions, manganese-enhanced MR imaging and dual-phase helical CT were not statistically different.",
keywords = "Liver neoplasms, CT, Liver neoplasms, MR, Magnetic resonance (MR), contrast media, Manganese",
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TY - JOUR

T1 - Liver lesions

T2 - Manganese-enhanced MR and dual-phase helical CT for preoperative detection and characterization - Comparison with receiver operating characteristic analysis

AU - Braga, Helio J V

AU - Choti, Michael A.

AU - Lee, Vivian S.

AU - Paulson, Erik K.

AU - Siegelman, Evan S.

AU - Bluemke, David A.

PY - 2002

Y1 - 2002

N2 - PURPOSE: The purpose of this study was to compare, by means of receiver operating characteristic (ROC) analysis, dual-phase helical computed tomography (CT) and manganese-enhanced magnetic resonance (MR) imaging in the detection and characterization of hepatic lesions in patients prior to surgery. MATERIALS AND METHODS: Twenty-five patients known to have or suspected of having hepatic lesions who were eligible for surgery underwent dual-phase (ie, arterial and portal phase) helical CT and phased-array MR imaging (ie, unenhanced fast spin-echo T2-weighted imaging and gradient-echo T1-weighted imaging performed before and after administration of mangafodipir trisodium). All images were reviewed independently by three off-site blinded reviewers who separately reviewed the CT scans and MR images. The standard of reference was findings at surgery, intraoperative ultrasonography (US), and histopathologic examination. ROC curves were established to analyze the results for each reader and modality. RESULTS: Ninety-four lesions (77 malignant and 17 benign) were revealed at surgery, intraoperative US, and/or histopathologic examination. The overall rate of lesion detection for the three readers at CT was 81.9% ± 7.8, 90.4% ± 5.9, and 76.6% ± 8.6. At MR imaging, the detection rates were 72.3% ± 9.0, 71.3% ± 9.1, and 69.1% ± 9.3 (P = .001 for the difference between MR and CT). The average rate of false-positive diagnoses in patients was 14.1% at CT and 6.4% at MR imaging (P = .06 for the difference between MR and CT). The mean areas under the alternative-free-response ROC curves were 0.74 for MR and 0.72 for CT (P = .751, not significant). CONCLUSION: In detection and characterization of liver lesions, manganese-enhanced MR imaging and dual-phase helical CT were not statistically different.

AB - PURPOSE: The purpose of this study was to compare, by means of receiver operating characteristic (ROC) analysis, dual-phase helical computed tomography (CT) and manganese-enhanced magnetic resonance (MR) imaging in the detection and characterization of hepatic lesions in patients prior to surgery. MATERIALS AND METHODS: Twenty-five patients known to have or suspected of having hepatic lesions who were eligible for surgery underwent dual-phase (ie, arterial and portal phase) helical CT and phased-array MR imaging (ie, unenhanced fast spin-echo T2-weighted imaging and gradient-echo T1-weighted imaging performed before and after administration of mangafodipir trisodium). All images were reviewed independently by three off-site blinded reviewers who separately reviewed the CT scans and MR images. The standard of reference was findings at surgery, intraoperative ultrasonography (US), and histopathologic examination. ROC curves were established to analyze the results for each reader and modality. RESULTS: Ninety-four lesions (77 malignant and 17 benign) were revealed at surgery, intraoperative US, and/or histopathologic examination. The overall rate of lesion detection for the three readers at CT was 81.9% ± 7.8, 90.4% ± 5.9, and 76.6% ± 8.6. At MR imaging, the detection rates were 72.3% ± 9.0, 71.3% ± 9.1, and 69.1% ± 9.3 (P = .001 for the difference between MR and CT). The average rate of false-positive diagnoses in patients was 14.1% at CT and 6.4% at MR imaging (P = .06 for the difference between MR and CT). The mean areas under the alternative-free-response ROC curves were 0.74 for MR and 0.72 for CT (P = .751, not significant). CONCLUSION: In detection and characterization of liver lesions, manganese-enhanced MR imaging and dual-phase helical CT were not statistically different.

KW - Liver neoplasms, CT

KW - Liver neoplasms, MR

KW - Magnetic resonance (MR), contrast media

KW - Manganese

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