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Cho S, Kurokawa R, Hagiwara A, Gonoi W, Mori H, Kawahara T, Nakaya M, Sakamoto N, Fujita N, Kamio S, Koyama H, Abe O. Localization of the central sulcus using the distinctive high signal intensity of the paracentral lobule on T1-weighted images. Neuroradiology 2021; 64:289-299. [PMID: 33959791 DOI: 10.1007/s00234-021-02729-4] [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: 12/06/2020] [Accepted: 04/27/2021] [Indexed: 11/29/2022]
Abstract
PURPOSE The central sulcus is an important landmark in the brain. This study aimed to investigate the distinctive signal of the paracentral lobule (PL) on T1-weighted images (T1WIs; the white PL sign) and evaluate its usefulness as a new method of identifying the central sulcus. METHODS T1WIs of the brain of 96 participants (age, 58.9 ± 17.9 years; range, 8-87 years) scanned at 3-T MR system were retrospectively reviewed. First, we qualitatively analyzed the signal of the cortex of the PL by comparing it with that of the ipsilateral superior frontal gyrus on a 4-point grading score. Second, we compared the cortical signal intensity and gray/white-matter contrast between the PL and superior frontal gyrus. Third, we evaluated the usefulness of the PL signal for identifying the central sulcus. RESULTS The PL cortex was either mildly hyperintense (grade 2) or definitely hyperintense (grade 3) in comparison with that of superior frontal cortex in all participants. The signal intensity of the PL cortex was significantly higher than that of the superior frontal cortex (p < 0.001), whereas the gray/white-matter contrast of the PL was weaker than that of the superior frontal gyrus (p < 0.001). The central sulci were identified with 94.3% accuracy (181/192) using the new method. CONCLUSION The white PL sign may be helpful in identifying the central sulcus, and this approach can be recognized as a new method for identification of the central sulcus.
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Affiliation(s)
- Shinichi Cho
- Department of Radiology, The University of Tokyo, 1-2-1, Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Ryo Kurokawa
- Department of Radiology, The University of Tokyo, 1-2-1, Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | | | - Wataru Gonoi
- Department of Radiology, The University of Tokyo, 1-2-1, Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Harushi Mori
- Department of Radiology, Jichi Medical University, Tochigi, Japan
| | - Takuya Kawahara
- Clinical Research Promotion Center, Biostatistics Unit, The University of Tokyo Hospital, Tokyo, Japan
| | - Moto Nakaya
- Department of Radiology, The University of Tokyo, 1-2-1, Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Naoya Sakamoto
- Department of Radiology, The University of Tokyo, 1-2-1, Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Nana Fujita
- Department of Radiology, The University of Tokyo, 1-2-1, Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Satoru Kamio
- Department of Radiology, The University of Tokyo, 1-2-1, Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Hiroaki Koyama
- Department of Radiology, The University of Tokyo, 1-2-1, Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Osamu Abe
- Department of Radiology, The University of Tokyo, 1-2-1, Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
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