Cine-MRI and T1TSE Sequence for Mediastinal Mass

Area of Science:

• Radiology
• Oncology
• Cardiovascular Imaging

Background:

• Contrast-enhanced computed tomography (CT) is the primary imaging modality for mediastinal tumors.
• Assessing tumor infiltration into central thoracic vessels, pericardium, or myocardium requires advanced techniques.
• Cine magnetic resonance imaging (cine-MRI) can provide supplementary diagnostic information.

Purpose of the Study:

• To evaluate the added value of cine-MRI and T1-weighted turbo spin echo (T1TSE) sequences in staging mediastinal tumors.
• To compare the accuracy of cine-MRI and T1TSE against intraoperative and histopathological findings.
• To determine the utility of additional MRI sequences when CT findings are equivocal.

Main Methods:

• Retrospective analysis of 47 patients with mediastinal tumors.
• Comparison of CT, cine-MRI, and T1TSE imaging against surgical and histopathological data.
• Focused re-evaluation of tumor infiltration into mediastinal structures in cases with unclear CT results.

Main Results:

• Cine-MRI accurately predicted aortic infiltration in 86%, pulmonary arteries in 85%, and atria in 80% of equivocal CT cases.
• Cine-MRI demonstrated superior accuracy over T1TSE for diagnosing aortic tumor infiltration in unclear CT findings.
• T1TSE sequence showed limited additional diagnostic value.

Conclusions:

• Cine-MRI provides significant benefits in clarifying mediastinal tumor extent when CT results are uncertain.
• Performing cine-MRI is recommended when suspicion of infiltration into large central vessels and atria exists.
• The T1TSE sequence offers minimal supplementary information in this context.