Perfusion MRI in normal and abnormal pituitary gland. A preliminary study
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Abstract:
Perfusion MRI (magnetic resonance imaging) of the pituitary gland was performed in 20 healthy volunteers and 63 patients with various lesions involving the pituitary gland. All patients underwent sequential contrast-enhanced MRI using spoiled gradient recalled sequences with high temporal resolution (7 seconds). Four pituitary areas (pituitary stalk, posterior lobe, postero-superior, and antero-inferior adenohypophysis) were tested with a selected region of interest. Maximal contrast percentual variation was calculated. The timing of enhancement in normal patients matched perfectly with normal pituitary vascularization. Abnormal timing in pathological condition was investigated.
Insights
Perfusion MRI of the pituitary gland reveals distinct enhancement timing in healthy individuals. Abnormalities in enhancement timing can indicate pituitary lesions in patients.
Area of Science:
- Radiology and Imaging Science
- Neuroimaging
- Endocrinology
Background:
- The pituitary gland's vascularization is crucial for its function.
- Assessing pituitary gland perfusion using MRI can aid in diagnosing various pathologies.
- Previous studies have explored MRI techniques for pituitary evaluation.
Purpose of the Study:
- To evaluate pituitary gland perfusion using dynamic contrast-enhanced MRI.
- To establish normal perfusion patterns in healthy volunteers.
- To investigate perfusion abnormalities in patients with pituitary lesions.
Main Methods:
- Sequential contrast-enhanced MRI with spoiled gradient recalled sequences was utilized.
- High temporal resolution (7 seconds) was employed for dynamic imaging.
- Four specific pituitary regions were analyzed for maximal contrast percentual variation.
Main Results:
- Normal pituitary vascularization showed a characteristic enhancement pattern in healthy volunteers.
- Abnormal enhancement timing was observed in patients with pituitary lesions.
- Maximal contrast percentual variation differed between normal and pathological conditions.
Conclusions:
- Dynamic perfusion MRI is effective in characterizing pituitary gland vascularization.
- Abnormal enhancement timing on perfusion MRI can serve as an indicator of pituitary pathology.
- This technique offers valuable insights into pituitary gland hemodynamics for diagnostic purposes.
