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Abstract #1655

Clinical Utility of a Commercial 0.55 Tesla MRI System for the Evaluation of Renal Lesions

Radhika Rajeev1, Tayson Lin 1, Hero K. Hussain1, Shane A. Wells1, William J. Weadock1, Anupama Ramachandran1, Maria Masotti1, Benjamin Mervak1, Anum Aslam1, Reve Chahine1, Benjamin V. Hirshberg1, Jacob Richardson1, Maria Masotti1, Nicole Seiberlich1, Vikas Gulani1, and Mishal Mendiratta-Lala1
1Department of Radiology, University of Michigan, Ann Arbor, MI, United States

Synopsis

Keywords: Kidney, Low-Field MRI, Renal mass evaluation

Motivation: Assessing whether 0.55T MRI can provide a viable alternative to 1.5T/3T for evaluating renal lesions.

Goal(s): To assess diagnostic performance of 0.55T MRI in differentiating solid from cystic renal masses and stratifying lesions based on risk of malignancy.

Approach: Retrospective study of 35 renal masses imaged at 0.55T, evaluated by radiologists in a blinded review on Likert-type scale.

Results: All 0.55T MRI examinations were rated as diagnostic. Differentiation between solid and cystic renal masses was feasible, achieving moderate inter-reader agreement (k=0.68). Cystic lesion stratification using Bosniak classification demonstrated substantial agreement (k=0.80). Prediction of histology of solid renal masses showed low inter-reader agreement (k=0.29).

Impact: 0.55T MRI can effectively characterize solid and cystic renal masses and risk-stratify cystic renal masses according to the Bosniak classification without compromising diagnostic accuracy.

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Keywords