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Chemical-shift MRI of pulmonary hamartomas: initial experience using a modified technique to assess nodule fat
Bruno Hochhegger1, Edson Marchiori, Daniela Quinto dos Reis
1Chest Radiology Department, Santa Casa de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil. brunohochhegger@gmail.com
Objective:
The aim of this study was to show the usefulness of chemical-shift MRI in the diagnosis of intranodular fat in seven patients with pulmonary hamartomas and indeterminate CT findings.
Conclusion:
In the setting of chemical-shift MRI, the average nodule signal intensity index of pulmonary hamartomas was 45.3% (SD = 25.5%). The correlation between average nodule signal intensity and CT attenuation in Hounsfield units was -0.94. Chemical-shift MRI could be an important tool for the detection of fat in pulmonary hamartomas with inconclusive CT findings.
