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Metastases in Mediastinal and Hilar Lymph Nodes in Patients With Non-Small Cell Lung Cancer : Quantitative Assessment With Diffusion-Weighted Magnetic Resonance Imaging and Apparent Diffusion Coefficient

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Title: Metastases in Mediastinal and Hilar Lymph Nodes in Patients With Non-Small Cell Lung Cancer : Quantitative Assessment With Diffusion-Weighted Magnetic Resonance Imaging and Apparent Diffusion Coefficient
Authors: Nakayama, Jun Browse this author
Miyasaka, Kazuo Browse this author
Omatsu, Tokuhiko Browse this author
Onodera, Yuuya Browse this author
Terae, Satoshi Browse this author
Matsuno, Yoshihiro Browse this author
Cho, Yasushi Browse this author
Hida, Yasuhiro Browse this author
Kaga, Kichizo Browse this author
Shirato, Hiroki Browse this author
Keywords: diffusion-weighted (DW) MR imaging
apparent diffusion coefficient (ADC)
lung cancer
lymph node
metastasis
Issue Date: Jan-2010
Publisher: Lippincott Williams & Wilkins
Journal Title: Journal of Computer Assisted Tomography
Volume: 34
Issue: 1
Start Page: 1
End Page: 8
Publisher DOI: 10.1097/RCT.0b013e3181a9cc07
PMID: 20118713
Abstract: Objective: To evaluate DW MR imaging for detection of metastases in lymph nodes by using quantitative analysis. Methods: Seventy patients with NSCLC were examined with DW and STIR TSE MR imaging. ADC of each lung cancer and lymph node was calculated from DW MR images. Difference of the ADC in a lung cancer and a lymph node was calculated (D1). From STIR TSE MR images, ratios of signal intensity in a lymph node to that in a 0.9% saline phantom was calculated (LSR1). For quantitative analysis, the threshold value for a positive test was determined on a per-node basis and tested for ability to enable a correct diagnosis on a per-patient basis. Results of quantitative analyses of DW and STIR MR images were compared on a per-patient basis with McNemar testing. Results: Mean D1 in the lymph node group with metastases was lower than that in the group without metastases (P < .001). When an D1 of 0.24 x 10^[-3] mm2/sec. was used as the positive-test threshold, sensitivity, specificity, and accuracy were 69.2%, 100%, and 94.0%, respectively on a per-patient basis. There was no significant difference (P > .05) between quantitative analyses of DW MR images and STIR MR images. Conclusions: Quantitative analysis of DW MR images enables differentiation of lymph nodes with metastasis from those without.
Rights: This is a non-final version of an article published in final form in Journal of Computer Assisted Tomography 34(1), pp 1-8, Jan. 2010
Relation: http://journals.lww.com/jcat/pages/default.aspx
Type: article (author version)
URI: http://hdl.handle.net/2115/44575
Appears in Collections:医学院・医学研究院 (Graduate School of Medicine / Faculty of Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 白土 博樹

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