Objective:To investigate the image quality and the value of tumor detail display of 7.0T ultra-high field strength T2WI in patients with glioma.Methods:Twenty-three subjects with gliomas were recruited in our hospital from Jan-uary 2022 to June 2022.All of them received 7.0T and 3.0T T2WI on the same day.In terms of image quality,image arti-facts and gray matter boundary,caudate nucleus,lenticular nucleus and infratentorial regions were evaluated.In terms of tu-mor details,flow empty vessels,internal structures and tumor boundary were assessed.Subjective evaluation was performed by two radiologists.SNR of white matter,gray matter,and lesion parenchyma,CNR of gray/white matter and white matter/lesion parenchyma were measured.Wilcoxon signed-rank test was used to evaluate the subjective scores.Pared-samples t test was used to compare the differences between the objective indicators.Results:The display of gray matter boundary,caudate nu-cleus and lenticular nucleus on 7.0T T2WI was better than that on 3.0T(P＜0.05),and the display of flow empty vessels and internal structure of tumor was better than that on 3.0T(P＜0.001).There was no significant difference in the display of arti-facts and tumor boundary between the two(P＞0.05).The clarity of infratentorial region of the 7.0T image was worse than that of the 3.0T image(P＜0.001).The SNR of white matter,gray matter and lesion parenchyma on 7.0T T2WI was higher than that on 3.0T(P＜0.001).CNR of gray/white matter on 7.0T T2WI was similar to that on 3.0T(P=0.440),and CNR of white matter/le-sion parenchyma was lower than 3.0T(P=0.028).Conclusion:Compared with 3.0T,7.0T T2WI significantly improves image SNR,allowing for clearer identification of normal brain anatomy and more internal tumor details.But the images quality of the infratentorial region is poor on 7.0T.
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