Korean Journal of Radiology

The Korean Society of Radiology (대한영상의학회)
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Readout-Segmented Echo-Planar Imaging in Diffusion-Weighted MR Imaging in Breast Cancer: Comparison with Single-Shot Echo-Planar Imaging in Image Quality

  • Kim, Yun Ju (Department of Radiology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Kim, Sung Hun (Department of Radiology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Kang, Bong Joo (Department of Radiology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Park, Chang Suk (Department of Radiology, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Kim, Hyeon Sook (Department of Radiology, St. Paul Hospital, College of Medicine, The Catholic University of Korea) ;
  • Son, Yo Han (Healthcare Sector, Siemens Ltd.) ;
  • Porter, David Andrew (Healthcare Sector, Siemens AG) ;
  • Song, Byung Joo (Department of General Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea)
  • Received : 2014.01.10
  • Accepted : 2014.04.12
  • Published : 2014.07.01
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Abstract

Objective: The purpose of this study was to compare the image quality of standard single-shot echo-planar imaging (ss-EPI) and that of readout-segmented EPI (rs-EPI) in patients with breast cancer. Materials and Methods: Seventy-one patients with 74 breast cancers underwent both ss-EPI and rs-EPI. For qualitative comparison of image quality, three readers independently assessed the two sets of diffusion-weighted (DW) images. To evaluate geometric distortion, a comparison was made between lesion lengths derived from contrast enhanced MR (CE-MR) images and those obtained from the corresponding DW images. For assessment of image parameters, signal-to-noise ratio (SNR), lesion contrast, and contrast-to-noise ratio (CNR) were calculated. Results: The rs-EPI was superior to ss-EPI in most criteria regarding the qualitative image quality. Anatomical structure distinction, delineation of the lesion, ghosting artifact, and overall image quality were significantly better in rs-EPI. Regarding the geometric distortion, lesion length on ss-EPI was significantly different from that of CE-MR, whereas there were no significant differences between CE-MR and rs-EPI. The rs-EPI was superior to ss-EPI in SNR and CNR. Conclusion: Readout-segmented EPI is superior to ss-EPI in the aspect of image quality in DW MR imaging of the breast.

Keywords

References

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