Detection of Hepatocellular Carcinoma Using Double-echo FLASH Sequence during the Hepatic Arterial Phase

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• Purpose: The purpose of this study was to compare the performance of in-phase and opposed-phase gradient-recalled echo (GRE) pulse sequences in paramagnetic contrast-enhanced magnetic resonance (MR) imaging of hepatocellular carcinomas (HCCs) during the hepatic arterial phase. Material and methods: Thirty-four patients with 84 lesions with known or suspected HCCs, nine of whom had a fatty liver, were examined with double-echo GRE techniques under 1.5T before and 30 s after injection of gadopentenate dimeglumine at a dose of 0.1 mmol/kg. Echo times were 2.4 ms (opposed phase) and 5.0 ms (in phase). Contrast enhancement of the HCC detected in both in-phase and opposed-phase images was evaluated. The liver signal-to-noise ratio (SNR), lesion-liver contrast-to-noise ratio (CNR), and enhancement ratio (ER) were calculated for the largest lesion of each patient. Results: In dynamic gadolinium-enhanced images of the 84 HCCs, 81 (96.4%) were detected in both in-phase and opposed-phase images, two (2.4%) were detected in only in-phase images, and one (1.2%) was detected only in opposed-phase images. The liver SNR, CNR, and ER were 46.7±16.1, 15.2±10.3, and 0.637±0.268 for in-phase images, and 48.9±16.9, 16.3±11.8, and 0.647±0.309 for opposed-phase images, respectively. In patients with a fatty liver, the SNR, CNR, and ER were 46.0±18.1, 21.7±17.9, and 0.525±0.231 for in-phase images, and 44.3±18.7, 26.0±21.3, and 0.793±0.124 for opposed-phase images, respectively. No significant statistical differences were found between the in-phase and opposed-phase images. Conclusion: Opposed-phase GRE imaging is equivalent to in-phase GRE sequences in patients with or without fatty liver for detection of HCC in dynamic gadolinium-enhanced images.

• 日本磁気共鳴医学会の論文
• 2004-07-15

著者

• Yamashita Yasuyuki

  Department Of Radiology Kumamoto University

• Yamashita Yasuyuki

  熊本大学 医学薬学研究部放射線診断学

• Yanaga Yumi

  熊本大学 医学薬学研究部放射線診断学

• Awai Kazuo

  熊本大学 医学薬学研究部放射線診断学

• Awai Kazuo

  Department Of Radiology Kumamoto University

• 山下 康行

  熊本大学 放射線医

• Yamaguchi Yasuo

  Department Of Surgery Ii Kumamoto University Medical School

• NAKAYAMA Yoshiharu

  Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University

• 山下 康行

  熊本大 医 放射線医学

• ARAKAWA Akihiko

  Departments of Radiology, and Maxillofacial Surgery, Kumamoto University School of Medicine

• NAMIMOTO Tomohiro

  Department of Radiology, Minamata City Hospital

• MORISHITA Shoji

  Department of Diagnostic Radiology, Kumamoto University Postgraduate School

• ARAKI Yuhshi

  Department of Radiology, Minamata City Hospital

• Yamashita Yasuyuki

  Department Of Diagnostic Imaging Faculty Of Medical And Pharmaceutical Sciences Kumamoto University

• Araki Yuhshi

  Department Of Radiology Minamata City Hospital

• Awai Kazuo

  Department Of Diagnostic Radiology Graduate School Of Medical Sciences Kumamoto University

• Arakawa Akihiko

  Department Of Diagnostic Radiology Kumamoto University Postgraduate School

• Morishita Shoji

  Department Of Diagnostic Radiology Kumamoto University Postgraduate School

• Yamashita Yasuyuki

  Department Of Diagnostic Radiology Kumamoto University Postgraduate School

• Awai Kazuo

  Department Of Analysis Of Diagnostic Imaging Kumamoto University Postgraduate School

• Nakayama Yoshiharu

  Department Of Diagnostic Radiology Kumamoto University Postgraduate School

• Namimoto Tomohiro

  Department Of Diagnostic Radiology Graduate School Of Medical Sciences Kumamoto University

• Namimoto Tomohiro

  Department Of Radiology Minamata City Hospital

• Nakayama Yoshiharu

  Department Of Diagnostic Radiology Graduate School Of Medical Sciences Kumamoto University

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