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Xie H, Zhuang H, Guo Y, Sharma RD, Zhang Q, Li J, Lu S, Xu L, Chan Q, Yoneda T, Spincemaille P, Zhang H, Guo H, Prince MR, Yu C, Wang Y. The appearance of magnetic susceptibility objects in SWI phase depends on object size: Comparison with QSM and CT. Clin Imaging 2021; 82:67-72. [PMID: 34798560 DOI: 10.1016/j.clinimag.2021.11.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 10/14/2021] [Accepted: 11/07/2021] [Indexed: 11/03/2022]
Abstract
PURPOSE Tissue magnetic susceptibility sign can potentially be detected on susceptibility weighted imaging (SWI) phase (SW-P). This study aims to investigate its performance for depicting brain susceptibility structures. METHODS A simulation was performed to depict magnetic susceptibility structures of various geometries on SW-P and quantitative susceptibility mapping (QSM). Brain MRI was performed on 25 subjects using SWI on a 3 T MRI system. QSM was generated from the same data. SW-P and QSM were analyzed according to radiological assessment for depicting globus pallidus nuclei, optic radiation white matter tracts, and lateral ventricular choroid plexus calcifications. In 11 of these subjects, CT was available and correlated with SW-P and QSM to assess their performance in quantifying calcifications in the choroid plexus. RESULTS In simulation, the appearance of a sphere on SW-P ranged from centric nodule to mixed positive and negative values as the diameter increased. Large cylinders also appeared as mixed positive and negative values. In comparison, QSM correctly depicted the susceptibility distribution of all magnetic structures. On human brain images, SW-P depicted the globus pallidus and optic radiation with mixed positive and negative values, consistent with simulation, and small choroid plexus calcifications as either mixed positive and negative values or as centric nodules; QSM depicted all structures as solid structures with the expected signs. For measuring calcification in the choroid plexus, QSM vs CT linear regression had a higher coefficient of determination compared to SW-P vs CT and SW-P vs QSM. CONCLUSION Appearance of susceptibility sources on SW-P changes with object size. This problem can be overcome using QSM.
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Affiliation(s)
- Hong Xie
- Department of Radiology, The First College of Clinical Medical Science, Three Gorges University, Yichang, Hubei Province, China
| | - Hangwei Zhuang
- Department of Biomedical Engineering, Cornell University, Ithaca, NY, USA
| | - Yihao Guo
- Department of Biomedical Engineering, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Ria D Sharma
- Department of Biomedical Engineering, Cornell University, Ithaca, NY, USA
| | - Qihao Zhang
- Department of Radiology, Weill Medical College of Cornell University, New York, NY, USA
| | - Jiahao Li
- Department of Radiology, Weill Medical College of Cornell University, New York, NY, USA
| | - Shimin Lu
- Center for Biomedical Imaging Research, Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, China
| | - Liang Xu
- Department of Radiology, The First College of Clinical Medical Science, Three Gorges University, Yichang, Hubei Province, China
| | | | - Tetsuya Yoneda
- Department of Medical Imaging Sciences, Kumamoto University, Kumamoto, Japan
| | - Pascal Spincemaille
- Department of Radiology, Weill Medical College of Cornell University, New York, NY, USA
| | - Honglei Zhang
- Department of Radiology, Weill Medical College of Cornell University, New York, NY, USA; Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Hua Guo
- Center for Biomedical Imaging Research, Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, China
| | - Martin R Prince
- Department of Radiology, Weill Medical College of Cornell University, New York, NY, USA
| | - Chengxin Yu
- Department of Radiology, The First College of Clinical Medical Science, Three Gorges University, Yichang, Hubei Province, China
| | - Yi Wang
- Department of Biomedical Engineering, Cornell University, Ithaca, NY, USA; Department of Radiology, Weill Medical College of Cornell University, New York, NY, USA.
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