Comparison of chest computed tomography and 3-T magnetic resonance imaging results in patients with common variable...

Area of Science:

• Radiology
• Medical Imaging
• Immunology

Background:

• Patients with common variable immunodeficiency (CVID) experience frequent pulmonary infections.
• CVID necessitates regular follow-up imaging, often with computed tomography (CT) scans.
• CT scans involve radiation exposure, posing a cumulative risk for patients requiring frequent monitoring.

Purpose of the Study:

• To assess the diagnostic capabilities of 3-Tesla (3T) magnetic resonance imaging (MRI) for evaluating lung changes in CVID patients.
• To compare the performance of 3T MRI against CT scans in identifying mediastinal and parenchymal abnormalities in CVID.
• To determine the suitability of MRI as a radiation-free alternative for longitudinal imaging in CVID.

Main Methods:

• Prospective study involving 20 CVID patients undergoing both 3T MRI and CT scans on the same day.
• Standard MRI sequences (T2-weighted HASTE, T2-weighted BLADE, 3D VIBE) were utilized.
• Modified Bhalla scoring system was applied to evaluate CT and MRI findings, comparing mediastinal and parenchymal changes.

Main Results:

• 85% of patients showed parenchymal abnormalities on either CT or MRI.
• CT and MRI demonstrated similar performance in assessing bronchiectasis, bronchial wall thickening, and mucus plugging.
• Excellent agreement was observed for nodules larger than 5 mm, while MRI was less sensitive for smaller nodules (<5 mm).

Conclusions:

• 3T MRI successfully identified mediastinal and parenchymal alterations in CVID patients, with findings correlating well to CT.
• While limitations exist, particularly with small nodules, MRI is a viable radiation-free imaging modality for CVID.
• MRI offers a valuable alternative for longitudinal lung monitoring in CVID patients, minimizing cumulative radiation exposure.