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Synthetic MR image generation of macrotrabecular-massive hepatocellular carcinoma using generative adversarial networks. | LitMetric

AI Article Synopsis

  • This study aimed to create a method for generating synthetic MR images of macrotrabecular-massive hepatocellular carcinoma (MTM-HCC) to improve imaging capabilities.* -
  • Researchers used MR images from 91 patients with MTM-HCC and a separate group of 67 patients, employing a 3-step pipeline to create realistic synthetic images and evaluating them with the help of radiologists.* -
  • The results showed that 1000 synthetic images were generated with consistent quality, achieving a score of 0.64 in evaluations, suggesting promising potential for these images in automatic diagnosis but indicating the need for further research.*

Article Abstract

Purpose: The purpose of this study was to develop a method for generating synthetic MR images of macrotrabecular-massive hepatocellular carcinoma (MTM-HCC).

Materials And Methods: A set of abdominal MR images including fat-saturated T1-weighted images obtained during the arterial and portal venous phases of enhancement and T2-weighted images of 91 patients with MTM-HCC, and another set of MR abdominal images from 67 other patients were used. Synthetic images were obtained using a 3-step pipeline that consisted in: (i), generating a synthetic MTM-HCC tumor on a neutral background; (ii), randomly selecting a background among the 67 patients and a position inside the liver; and (iii), merging the generated tumor in the background at the specified location. Synthetic images were qualitatively evaluated by three radiologists and quantitatively assessed using a mix of 1-nearest neighbor classifier metric and Fréchet inception distance.

Results: A set of 1000 triplets of synthetic MTM-HCC images with consistent contrasts were successfully generated. Evaluation of selected synthetic images by three radiologists showed that the method gave realistic, consistent and diversified images. Qualitative and quantitative evaluation led to an overall score of 0.64.

Conclusion: This study shows the feasibility of generating realistic synthetic MR images with very few training data, by leveraging the wide availability of liver backgrounds. Further studies are needed to assess the added value of those synthetic images for automatic diagnosis of MTM-HCC.

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Source
http://dx.doi.org/10.1016/j.diii.2023.01.003DOI Listing

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