Abstract #2299

Feasibility study of nodule conspicuity for lung screening using ultrashort echo time MRI

Saori Koshino^1,2, Takeharu Yoshikawa³, Yukihiro Nomura³, Soichiro Miki³, Shouhei Hanaoka², Takeyuki Watadani², Naoto Hayashi³, and Osamu Abe^1,2

¹Department of Radiology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan, ²Department of Radiology, The University of Tokyo Hospital, Tokyo, Japan, ³Department of Computational Diagnostic Radiology and Preventive Medicine, The University of Tokyo Hospital, Tokyo, Japan

Pulmonary MRI with ultrashort echo time (UTE) is expected to be an alternative to low-dose CT for lung screening. In this study, the feasibility of breath-hold (BH) and respiratory triggered (RT) scans with UTE was investigated. In total, 229 lung MRI examinations that were composed of 136 examinations with a solid nodule (SN) and 93 examinations with a ground-glass nodule (GGN) were evaluated. Both results of qualitative and quantitative assessment suggested that SN was more clearly depicted than GGN. BH scan in pulmonary MRI should be more suitable for lung screening than RT scan.

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