J Korean Soc Radiol.  2018 Mar;78(3):179-189. 10.3348/jksr.2018.78.3.179.

Does Multiphasic Contrast Enhanced Fluid Attenuated Inversion Recovery Magnetic Resonance Imaging Enhance the Detectability of Small Intracerebral Metastases?

Affiliations
  • 1Department of Radiology, Chungbuk National University Hospital, Cheongju, Korea. shcha@chungbuk.ac.kr
  • 2Translational Brain Disease Research Lab, Clinical Research Institute, Chungbuk National University Hospital, Cheongju, Korea.
  • 3Radiology, Bayer Healthcare Medical Care, Seoul, Korea.
  • 4Department of Radiology, College of Medicine, Chungbuk National University, Cheongju, Korea.

Abstract

PURPOSE
To determine adequate timing of acquisition of contrast-enhanced fluid attenuated inversion recovery (FLAIR) by using multiphasic contrast-enhanced FLAIR magnetic resonance imaging (MRI) and to evaluate added value in detecting small intracerebral metastases 5 mm or less.
MATERIALS AND METHODS
Twenty-nine patients, that underwent multiphasic contrast-enhanced FLAIR MRI and contrast-enhanced T1 weighted image (T1WI) were included and total number of small intracerebral metastases was 131. Sensitivity, specificity and accuracy of lesion detection were evaluated. Contrast ratio (CR) and enhancement ratio of each lesion were compared and analyzed among each imaging sequence.
RESULTS
Sensitivity, specificity and accuracy of lesion detection were increased when contrast-enhanced FLAIR was added to contrast-enhanced T1WI. Area of under receiver operating characteristic curve significantly increased by addition of contrast-enhanced FLAIR than using contrast-enhanced T1WI alone (p < 0.05). CR was significantly higher in contrast-enhanced T1WI than FLAIR (p < 0.001). All of the above results were not different according to time of acquisition of contrastenhanced FLAIR.
CONCLUSION
There was advantage of conducting contrast-enhanced FLAIR MRI, but multiphasic contrast-enhanced FLAIR did not provide additional information for detection of small intracerebral metastases compared with single-phase FLAIR MRI.

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