This study aimed to investigate the diagnosis efficacy of native T1-mapping in focal pulmonary lesion, focused on lesions display and accuracy of size estimation. All lesions were clearlly demonstrated by CT, native T1-mapping, T1-star VIBE, and T2-fBLADE TSE. The tumor and distal obstructive pulmonary atelectasis can also be detected clearly by native T1-mapping. T1-mapping-based diameter measurements yielded excellent intra-observer and inter-methods consistent.In conclusion, we considered that native T1-mapping displays focal pulmonary lesions clearly (particularly when accompanying obstructive atelectasis and/or pneumonia) and enable accurate and reliable diameter measurement.
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