1143 A REAL-TIME MOTION ANALYSIS OF PENILE ERECTION WITH TURBO-FLASH MR IMAGING SYSTEM

Abstract

You have accessJournal of UrologySexual Function/Dysfunction/Andrology: Evaluation I1 Apr 20121143 A REAL-TIME MOTION ANALYSIS OF PENILE ERECTION WITH TURBO-FLASH MR IMAGING SYSTEM Jintetsu Soh, Noriyuki Kanemitsu, Atsushi Ochiai, Yasuyuki Naitoh, Yoshio Naya, kazumi Kamoi, Akihiro Kawauchi, and Tsuneharu Miki Jintetsu SohJintetsu Soh Kyoto, Japan More articles by this author , Noriyuki KanemitsuNoriyuki Kanemitsu 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 , Yoshio NayaYoshio Naya Kyoto, Japan More articles by this author , kazumi Kamoikazumi Kamoi Kyoto, Japan More articles by this author , Akihiro KawauchiAkihiro Kawauchi 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.2012.02.1253AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookTwitterLinked InEmail INTRODUCTION AND OBJECTIVES There have been no reports of real-time image analysis in the corpus cavernosum from the initiation to the end of erection without artificial induction. Using Turbo-FLASH MRI, we were able to obtain a series of high resolution images through tumescence, maintenance and detumescence phases of erection. The aim of this study was to analyze the dynamic morphological changes in the penis during a normal erection. METHODS The participants in this study included 5 healthy volunteers without experience of erectile dysfunction. Ages ranged from 22 to 47 (median 33) years. IIEF-5 score ranged from 22 to 25 (median 23) points. Audio-visual sexual stimulation was used to induce erection. MRI was conducted using Siemens MAGNETOM Sonata 1.5T with body array and spine coils. True-FISP sequence was used with conditions of TR: 4.38 ms, TE: 2.19 ms, and scan time: 0.85 sec/slice. Using dynamic images, the volume of the corpus cavernosum within the tunica albuginea were consecutively calculated by measuring length, width, and thickness in sagittal and coronal section during all phases of a normal erection (Figure 1). Morphological changes were evaluated with indices including the maximum changes in the volume between latent and full erection phases of the corpus cavernosum as well as the consecutive volume increase rate per second. RESULTS From initiation to completion of erection, range of time required from 110 to 120 (median 115) seconds, changes in volume of corpus cavernosum ranged from 28 to 35 (median 32) ml. Maximum volume increase rate ranged from0.5 to 0.8 (median 0.66) ml/sec (Figure 2). CONCLUSIONS By using Turbo-FLASH MRI, dynamic phases of a normal erection can be analyzed calculating the maximum changes in volume of corpus cavernosum as well as volume increase rate per second. Further study is warranted to prove these novel parameters as a measurement of vascular function. © 2012 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 187Issue 4SApril 2012Page: e463-e464 Advertisement Copyright & Permissions© 2012 by American Urological Association Education and Research, Inc.MetricsAuthor Information Jintetsu Soh Kyoto, Japan More articles by this author Noriyuki Kanemitsu 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 Yoshio Naya Kyoto, Japan More articles by this author kazumi Kamoi Kyoto, Japan More articles by this author Akihiro Kawauchi Kyoto, Japan More articles by this author Tsuneharu Miki Kyoto, Japan More articles by this author Expand All Advertisement Advertisement PDF downloadLoading ...