title: Optimal Imaging Parameters for Readout-segmented EPI of the Temporal Bone.
abstract: Readout-segmented echo planar imaging (rs-EPI) is a form of multi-shot EPI. rs-EPI is affected less by susceptibility artifacts than single-shot EPI (ss-EPI), which is widely used for diffusion-weighted imaging, so rs-EPI is expected to produce less image distortion. In this study, we compared rs-EPI and conventional ss-EPI of the temporal bone region, which contains abundant amounts of air and frequently exhibits changes in magnetic susceptibility. In addition, we used a phantom to determine the optimum rs-EPI acquisition conditions for clinical use and investigated the clinical utility of rs-EPI in 20 patients (8 men, 12 women, mean age, 54.3 ± 16.7-years-old) with cholesteatoma (mean apparent diffusion coefficient on ss-EPI, 0.88 × 10(-3) ± 0.18 mm(2)/s). The images of the temporal bone region produced using rs-EPI exhibited less distortion than those obtained with ss-EPI (P < 0.05).
authors.affiliation: Department of Radiological Technology, Miyazaki University School of Medicine.
authors.forename: Toshiya
authors.initials: T
authors.lastname: Azuma
authors.forename: Takao
authors.initials: T
authors.lastname: Kodama
authors.forename: Takanori
authors.initials: T
authors.lastname: Yano
authors.forename: Masahiro
authors.initials: M
authors.lastname: Enzaki
authors.forename: Masato
authors.initials: M
authors.lastname: Nakamura
authors.forename: Katsutoshi
authors.initials: K
authors.lastname: Murata
mesh_terms: D000328:Adult; D000368:Aged; D016477:Artifacts; D001847:Bone Diseases / Q000175:diagnosis; D002781:Cholesteatoma / Q000175:diagnosis; D038524:Diffusion Magnetic Resonance Imaging / Q000379:methods; D017352:Echo-Planar Imaging / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D019047:Phantoms, Imaging; D013701:Temporal Bone / Q000033:anatomy & histology*