You have accessJournal of UrologyImaging/Radiology: Uroradiology1 Apr 20112308 INVESTIGATION OF THE MORPHOLOGICAL CHANGES IN PENILE ERECTION AND PENILE ARTERIAL INFLOW USING TURBO-FLASH MRI Jintetsu Soh, Yoshio Naya, Atsushi Ochiai, Yasuyuki Naitoh, Noriyuki Kanemitsu, Kazumi Kamoi, kawauchi Akihiro, and tsuneharu Miki Jintetsu SohJintetsu Soh Kyoto, Japan More articles by this author , Yoshio NayaYoshio Naya Kyoto, Japan More articles by this author , Atsushi OchiaiAtsushi Ochiai Kyoto, Japan More articles by this author , Yasuyuki NaitohYasuyuki Naitoh Kyoto, Japan More articles by this author , Noriyuki KanemitsuNoriyuki Kanemitsu Kyoto, Japan More articles by this author , Kazumi KamoiKazumi Kamoi Kyoto, Japan More articles by this author , kawauchi Akihirokawauchi Akihiro Kyoto, Japan More articles by this author , and tsuneharu Mikitsuneharu Miki Kyoto, Japan More articles by this author View All Author Informationhttps://doi.org/10.1016/j.juro.2011.02.2554AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookTwitterLinked InEmail INTRODUCTION AND OBJECTIVES To date, there are no reports concerning real-time imaging analysis of penile erection from the beginning to complete erection, and from sustained erection till the end of erection. The objectives of this study were to observe the morphological changes in normal penile erection chronologically from the beginning to complete erection, and till the end of erection, and to evaluate the required penile arterial inflow for normal erection, using Turbo-FLASH magnetic resonance imaging (MRI) by taking continuous high resolution images without stopping movement for real-time imaging analysis. METHODS The study subjects were 10 volunteers aged 22 to 47 years (median: 31 years) who gave written informed consents. Erection was induced by visual arousal stimulation using videos. Imaging devices and their conditions (1) MRI: MAGNETOM Sonata 1.5T, Siemens AG; (2) Coil: Body Array Coil and Spine Coil; (3) Imaging sequence: True FISP sequence; and (4) Imaging conditions: Repetition Time (TR): 4.38 milliseconds, Echo Time (TE): 2.19 milliseconds, Scan Time: 0.85 seconds/slice. Morphological analysis Using static images and dynamic images, the extensions of caverns of the corpora cavernosa and tunica albuginea were analyzed to evaluate the morphological changes of normal penile erection chronologically under MRI observation (Figure 1). Evaluation of arterial blood inflow into corpora cavernosa The area and volume change ratios of the corpora cavernosa, such as volume change in 1 second, were evaluated. RESULTS The duration from the beginning to complete erection ranged from 110 to 120 seconds (median: 116 seconds) in 5 volunteers who achieved complete erection. The volume changes in the corpora cavernosa from baseline and the maximum change ratio in 1 second ranged from 28 to 35 mL (median: 32 mL), and from 0.5 to 0.8 mL/sec (median: 0.6 mL/sec), respectively (Figure 2). On the other hand, in the other 5 volunteers with incomplete erection, the volume changes in the corpora cavernosa from baseline and the maximum change ratio in 1 second ranged from 5 to 17 mL (median: 12 mL), and from 0.1 to 0.3 mL/sec (median: 0.2 mL/sec), respectively. CONCLUSIONS Using Turbo-FLASH MRI, real-time imaging analysis of the erectile function was performed, which enabled to evaluate the duration from the beginning to complete erection, the required arterial blood inflow into the corpora cavernosa for complete erection and the volume change ratio in 1 second. © 2011 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 185Issue 4SApril 2011Page: e925-e926 Advertisement Copyright & Permissions© 2011 by American Urological Association Education and Research, Inc.MetricsAuthor Information Jintetsu Soh Kyoto, Japan More articles by this author Yoshio Naya Kyoto, Japan More articles by this author Atsushi Ochiai Kyoto, Japan More articles by this author Yasuyuki Naitoh Kyoto, Japan More articles by this author Noriyuki Kanemitsu Kyoto, Japan More articles by this author Kazumi Kamoi Kyoto, Japan More articles by this author kawauchi Akihiro Kyoto, Japan More articles by this author tsuneharu Miki Kyoto, Japan More articles by this author Expand All Advertisement Advertisement PDF downloadLoading ...