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Purpose <p>7T MRI imaging of the pituitary gland is an emerging technique. The purpose of this article is to review the current status of the 7T MRI of the pituitary gland, particularly in the context of pituitary microadenoma pathology. We will discuss technical challenges and parallel transmission opportunities.</p> Methods <p>Follow-up study selection and data extraction were performed following PRISMA guidelines. We focused on diagnostic performance and acquisition protocols. Inclusion criteria were: MRI imaging studies of pituitary adenoma at 7T. Exclusion criteria were: Case reports and reviews; studies which did not report MRI protocols; surgical planning studies; studies focusing exclusively on macroadenomas for which ultra-high magnetic field imaging is less decisive than microadenomas in clinical practice.</p> Results <p>Six studies were included. 7T MRI outperformed 1.5 or 3T MRI for the detection of microadenomas. Acquisition protocols employed were heterogeneous, with two-dimensional T<sub>2-w</sub> and T<sub>1-w</sub> turbo spin-echo sequences, three-dimensional T<sub>1-w</sub> isotropic spin-echo and gradient-echo sequences (resolution: 0.6 and 0.8&#xa0;mm), and dynamic contrast-enhanced T<sub>1-w</sub> sequences.</p> Conclusion <p>7T MRI is a promising tool for overcoming the difficulties encountered by conventional MRI, particularly in the case of Cushing disease. However, there is insufficient data to precisely define an optimal protocol yet.</p>

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Review of 7T MRI imaging of pituitary microadenomas: are we there yet?

  • 期刊论文

  • 发表日期：

    2025年3月8日

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  • Benoit Testud,
  • Aurélien Destruel,
  • Thomas Troalen,
  • Jean-Philippe Ranjeva,
  • Maxime Guye

摘要

Purpose

7T MRI imaging of the pituitary gland is an emerging technique. The purpose of this article is to review the current status of the 7T MRI of the pituitary gland, particularly in the context of pituitary microadenoma pathology. We will discuss technical challenges and parallel transmission opportunities.

Methods

Follow-up study selection and data extraction were performed following PRISMA guidelines. We focused on diagnostic performance and acquisition protocols. Inclusion criteria were: MRI imaging studies of pituitary adenoma at 7T. Exclusion criteria were: Case reports and reviews; studies which did not report MRI protocols; surgical planning studies; studies focusing exclusively on macroadenomas for which ultra-high magnetic field imaging is less decisive than microadenomas in clinical practice.

Results

Six studies were included. 7T MRI outperformed 1.5 or 3T MRI for the detection of microadenomas. Acquisition protocols employed were heterogeneous, with two-dimensional T2-w and T1-w turbo spin-echo sequences, three-dimensional T1-w isotropic spin-echo and gradient-echo sequences (resolution: 0.6 and 0.8 mm), and dynamic contrast-enhanced T1-w sequences.

Conclusion

7T MRI is a promising tool for overcoming the difficulties encountered by conventional MRI, particularly in the case of Cushing disease. However, there is insufficient data to precisely define an optimal protocol yet.