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Objective <p>To explore the feasibility of using magnetic resonance imaging (MRI) with T1-weighted free-breathing Star-VIBE sequences for improving image quality in chest examinations compared with conventional T1-weighted breath-hold VIBE (C-VIBE) sequences.</p> Methods <p>The data of 20 patients with chest MRI examinations in our hospital were prospectively collected. The scanning sequences included conventional breath-hold T1-weighted VIBE sequences (echo time [TE]: 1.29 ms; repetition time [TR]: 3.97 ms) and free-breathing T1-weighted Star-VIBE sequences (TE: 1.39 ms; TR: 2.79 ms). The signal intensity (SI) and standard deviation (SD) of the ascending aorta, pulmonary artery trunk, and descending aorta were measured at the level of the main pulmonary artery. The signal-to-noise ratio (SNR = SI/SD) and coefficient of variation (CV = SD/SI) of SI were calculated. The MR image quality was subjectively scored double-blindly using a&#xa0;5-point scoring system by two radiologists who had more than 10&#xa0;yearsʼ experience in diagnosing chest diseases and more than 5&#xa0;years’ experience in MR diagnosis of chest diseases.</p> Results <p>The SNR of the ascending aorta, pulmonary artery trunk, and descending aorta with free-breathing T1-weighted Star-VIBE sequences was significantly higher than that of conventional breath-hold T1-weighted VIBE sequences (<i>p</i> &lt; 0.05), while the CV of SI with the former sequences was significantly lower than that of the latter sequences (<i>p</i> &lt; 0.05). The subjective scores of the two radiologists regarding the image quality of the two types of sequences had excellent consistency (κ &gt; 0.80, <i>p</i> &lt; 0.05); the subjective scores for free-breathing T1-weighted Star-VIBE sequences were significantly higher than for conventional breath-hold T1-weighted VIBE sequences (<i>p</i> &lt; 0.05).</p> Conclusion <p>Magnetic resonance imaging with free-breathing T1-weighted Star-VIBE sequences can significantly improve image quality of chest studies compared with conventional breath-hold T1-weighted VIBE sequences.</p>

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Improving image quality by comparing two chest MRI sequences: free-breathing T1-weighted Star-VIBE and breath-holding T1-weighted 3D VIBE Dixon

  • 期刊论文

  • 发表日期：

    2025年4月25日

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  • Zhanli Ren,
  • Xirong Zhang,
  • Haifeng Duan,
  • Yu Nan

摘要

Objective

To explore the feasibility of using magnetic resonance imaging (MRI) with T1-weighted free-breathing Star-VIBE sequences for improving image quality in chest examinations compared with conventional T1-weighted breath-hold VIBE (C-VIBE) sequences.

Methods

The data of 20 patients with chest MRI examinations in our hospital were prospectively collected. The scanning sequences included conventional breath-hold T1-weighted VIBE sequences (echo time [TE]: 1.29 ms; repetition time [TR]: 3.97 ms) and free-breathing T1-weighted Star-VIBE sequences (TE: 1.39 ms; TR: 2.79 ms). The signal intensity (SI) and standard deviation (SD) of the ascending aorta, pulmonary artery trunk, and descending aorta were measured at the level of the main pulmonary artery. The signal-to-noise ratio (SNR = SI/SD) and coefficient of variation (CV = SD/SI) of SI were calculated. The MR image quality was subjectively scored double-blindly using a 5-point scoring system by two radiologists who had more than 10 yearsʼ experience in diagnosing chest diseases and more than 5 years’ experience in MR diagnosis of chest diseases.

Results

The SNR of the ascending aorta, pulmonary artery trunk, and descending aorta with free-breathing T1-weighted Star-VIBE sequences was significantly higher than that of conventional breath-hold T1-weighted VIBE sequences (p < 0.05), while the CV of SI with the former sequences was significantly lower than that of the latter sequences (p < 0.05). The subjective scores of the two radiologists regarding the image quality of the two types of sequences had excellent consistency (κ > 0.80, p < 0.05); the subjective scores for free-breathing T1-weighted Star-VIBE sequences were significantly higher than for conventional breath-hold T1-weighted VIBE sequences (p < 0.05).

Conclusion

Magnetic resonance imaging with free-breathing T1-weighted Star-VIBE sequences can significantly improve image quality of chest studies compared with conventional breath-hold T1-weighted VIBE sequences.