In using magnetic resonance imaging (MRI) to stage nonsmall cell carcinoma
of the lung, which of the following are true?
a) Lymph node metastases in the aorto-pulmonary window are better evaluated
with CT than MRI
b) T2-weighted images are most useful in the assessment of chest wall invasion
c) MRI h. the best modality to assess superior sulcus tumours
d) CT is superior to MRI in the assessment of mediastinal invasion
e) MRI signal characteristics allow discrimination between normal and infiltrated lymph nodes
The correct answers are:
b) T2-weighted images are most useful in the assessment of chest wall invasion
c) MRI is the best modality to assess superior sulcus tumors
Here’s a brief explanation:
– T2-weighted MRI images are particularly useful for assessing chest wall invasion, as they provide high contrast between tumor tissue and surrounding structures.
– MRI is superior to CT in evaluating superior sulcus tumors (located in the apex of the lung), as it provides better soft tissue contrast and can help assess invasion into surrounding structures like the brachial plexus and vertebrae.