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Volume 46 Issue 5
Sep.  2023
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HU Mei, ZHANG Ling, LIU Jun. Value of diffusion-weighted magnetic resonance imaging using readout-segmented echo-planar imaging sequence in the diagnosis of orbit tumors and tumorlike lesions[J]. Journal of Molecular Imaging, 2023, 46(5): 868-872. doi: 10.12122/j.issn.1674-4500.2023.05.16
Citation: HU Mei, ZHANG Ling, LIU Jun. Value of diffusion-weighted magnetic resonance imaging using readout-segmented echo-planar imaging sequence in the diagnosis of orbit tumors and tumorlike lesions[J]. Journal of Molecular Imaging, 2023, 46(5): 868-872. doi: 10.12122/j.issn.1674-4500.2023.05.16

Value of diffusion-weighted magnetic resonance imaging using readout-segmented echo-planar imaging sequence in the diagnosis of orbit tumors and tumorlike lesions

doi: 10.12122/j.issn.1674-4500.2023.05.16
  • Received Date: 2023-01-30
    Available Online: 2023-10-20
  • Publish Date: 2023-09-20
  •   Objective  To evaluate the value of diffusion-weighted MRI using readout-segmented echo-planar imaging (RS-EPI) sequence in the diagnosis of orbit tumors and tumorlike lesions.  Methods  A retrospective study was performed on 60 patients with orbital tumors or tumorlike lesions in our hospital from December 2016 to December 2018. The patients were imaged on a 3T MRI scanner (MAGNETOM Trio Tim). The RS-EPI and single-shot echo-planar imaging (SS-EPI) sequences were compared in terms of image quality. The diagnostic efficacy between RS-EPI sequence and SS-EPI sequence for orbital tumors and tumorlike lesions were compared.  Results  Fat suppression in the RS-EPI sequence showed no statistical difference to that in the SS-EPI sequence (P > 0.05), while RS-EPI sequence was was superior to SS-EPI sequence in terms of normal anatomical structure display, ghosting artifact, overall image quality (P < 0.001). The apparent diffusion coefficient (ADC) values of vitreous body and brainstem yielded no statistical difference between two methods (P > 0.05). The geometric distortion ratio in both anterior-posterior and right-left direction, as well as signal-to-noise ratio of RS-EPI sequence were all lower than those of SS-EPI sequence (P < 0.001). The diagnostic sensitivity of RS-EPI sequence for orbital tumors and tumorlike lesions was significantly higher than that of SS-EPI sequence (P < 0.05). ROC curve denoted that the area under the curve of RS-EPI sequence in the diagnosis of orbital tumors and tumorlike lesions was significantly larger than that of SS-EPI sequence (P < 0.001).  Conclusion  MRI using RS-EPI sequence can effectively improve the image quality and diagnostic sensitivity of orbital tumors and tumorlike lesions.

     

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