title: Identification of Heschl's gyrus on phase difference enhanced imaging.
abstract: Background The white matter in the Heschl's gyrus (HG-WM) may appear differently to the other gyri on phase difference enhanced imaging (PADRE), which can enhance the myelin density. Purpose To evaluate the signal intensity (SI) of HG-WM using the PADRE technique and to compare the images with susceptibility-weighted imaging (SWI)-like images. Material and Methods The participants included 19 normal controls (38 HGs; mean age, 60.1 years; age range, 28-80 years). Coronal PADRE and SWI-like images were acquired using a 3T magnetic resonance (MR) system. The SI of the HG-WM was classified into three grades based on a comparison with the SI of the superior temporal gyrus: Grade 1, isointense; Grade 2, slightly hypointense, and Grade 3, markedly hypointense. Results In the assessment of the SI of the HG-WM, the HG-WM appeared hypointense in all 38 sites of the 19 participants; the hypointensity corresponded to Grade 2 in 13 (34%) images and Grade 3 in 25 (66%) images. On the other hand, the HG-WM was classified as Grade 1 (isointense) in all of the SWI-like images. Conclusion The HG-WM appears hypointense on PADRE, which probably reflects the higher myelin content. PADRE may be useful for identifying the HG through the assessment of the SI of the HG-WM.
authors.affiliation: 1 Department of Radiology, University of Occupational and Environmental Health School of Medicine, Kitakyusyu, Japan.
authors.forename: Satoru
authors.initials: S
authors.lastname: Ide
authors.affiliation: 1 Department of Radiology, University of Occupational and Environmental Health School of Medicine, Kitakyusyu, Japan.
authors.forename: Shingo
authors.initials: S
authors.lastname: Kakeda
authors.affiliation: 2 Department of Medical Physics in Advanced Biomedical Sciences, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan.
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Yoneda
authors.affiliation: 1 Department of Radiology, University of Occupational and Environmental Health School of Medicine, Kitakyusyu, Japan.
authors.forename: Keita
authors.initials: K
authors.lastname: Watanabe
authors.affiliation: 1 Department of Radiology, University of Occupational and Environmental Health School of Medicine, Kitakyusyu, Japan.
authors.forename: Koichiro
authors.initials: K
authors.lastname: Futatsuya
authors.affiliation: 1 Department of Radiology, University of Occupational and Environmental Health School of Medicine, Kitakyusyu, Japan.
authors.forename: Yu
authors.initials: Y
authors.lastname: Murakami
authors.affiliation: 1 Department of Radiology, University of Occupational and Environmental Health School of Medicine, Kitakyusyu, Japan.
authors.forename: Junji
authors.initials: J
authors.lastname: Moriya
authors.affiliation: 1 Department of Radiology, University of Occupational and Environmental Health School of Medicine, Kitakyusyu, Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Ogasawara
authors.affiliation: 1 Department of Radiology, University of Occupational and Environmental Health School of Medicine, Kitakyusyu, Japan.
authors.forename: Toru
authors.initials: T
authors.lastname: Sato
authors.affiliation: 1 Department of Radiology, University of Occupational and Environmental Health School of Medicine, Kitakyusyu, Japan.
authors.forename: Yukunori
authors.initials: Y
authors.lastname: Korogi
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001303:Auditory Cortex / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007089:Image Enhancement; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D066127:White Matter / Q000000981:diagnostic imaging*
keywords: Heschl’s gyrus; myelin; phase difference; phase difference enhanced imaging (PADRE); superficial white matter