Ejaculation in men: a dynamic endorectal ultrasonographical study

Gil-Vernet, J.M.; Álvarez-Vijande, R.; Gil-Vernet, Alfredo

doi:10.1111/j.1464-410x.1994.tb07612.x

Cited by 91 publications

(41 citation statements)

References 23 publications

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“…We were able to demonstrate the contraction and release of the internal sphincter and visualize the ejaculate, even without the benefit of using the endorectal coil for increased signal-to-noise ratio. The timing of the internal sphincter contraction and release, relative to the ejaculation moment, agrees broadly with an earlier US study by Gil-Vernet et al (26). …”

Section: Discussionsupporting

confidence: 90%

MR Imaging of the Prostate and Adjacent Anatomic Structures before, during, and after Ejaculation: Qualitative and Quantitative Evaluation

Medved

Sammet²,

Yousuf³

et al. 2014

Radiology

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Purpose To determine the possibility of obtaining high-quality magnetic resonance (MR) images before, during, and immediately after ejaculation and detecting measurable changes in quantitative MR imaging parameters after ejaculation. Materials and Methods In this prospective, institutional review board–approved, HIPAA-compliant study, eight young healthy volunteers (median age, 22.5 years), after providing informed consent, underwent MR imaging while masturbating to the point of ejaculation. A 1.5-T MR imaging unit was used, with an eight-channel surface coil and a dynamic single-shot fast spin-echo sequence. In addition, a quantitative MR imaging protocol that allowed calculation of T1, T2, and apparent diffusion coefficient (ADC) values was applied before and after ejaculation. Volumes of the prostate and seminal vesicles (SV) were calculated by using whole-volume segmentation on T2-weighted images, both before and after ejaculation. Pre- and postejaculation changes in quantitative MR parameters and measured volumes were evaluated by using the Wilcoxon signed rank test with Bonferroni adjustment. Results There was no significant change in prostate volumes on pre- and postejaculation images, while the SV contracted by 41% on average (median, 44.5%; P = .004). No changes before and after ejaculation were observed in T1 values or in T2 and ADC values in the central gland, while T2 and ADC values were significantly reduced in the peripheral zone by 12% and 14%, respectively (median, 13% and 14.5%, respectively; P = .004). Conclusion Successful dynamic MR imaging of ejaculation events and the ability to visualize internal sphincter closure, passage of ejaculate, and significant changes in SV volumes were demonstrated. Significant changes in peripheral zone T2 and ADC values were observed.

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Section: Discussionsupporting

confidence: 90%

MR Imaging of the Prostate and Adjacent Anatomic Structures before, during, and after Ejaculation: Qualitative and Quantitative Evaluation

Medved

Sammet²,

Yousuf³

et al. 2014

Radiology

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“…Robert Vernet of the University of Nouakchott has included the site on a map of 'Principal villages of the Tichitt culture'. 3 Indeed Guilemsi and other sites that skirt the western end of the Hodh Depression, such as Achram, Meksem Boubacar, and Edderoum, 4 are presumably those that comprise the Tagant part of the 'Tagant-Tichitt-Walata chain' described by MacDonald et al 5 Vernet has published three illustrations of Guilemsi stonewalling in his Dictionnaire Archeologique de la Mauritanie (pp. 82, 91.…”

Section: Guilemsi In Contextmentioning

confidence: 98%

Funerary monuments and horse paintings: A preliminary report on the archaeology of a site in the tagant region of South East Mauritania – near Dhar Tichitt

Challis

Campbell²,

Coulson³

et al. 2005

The Journal of North African Studies

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“…The local events occurring during orgasm were visualized using endorectal ultrasonography (Gil-Vernet et al, 1994).…”

Section: Physiological Backgroundmentioning

confidence: 99%

Orgasmic and ejaculatory dysfunction

Pryor¹

2002

Sexual and Relationship Therapy

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Ejaculation in men: a dynamic endorectal ultrasonographical study

Abstract: Endorectal ultrasonographical imaging during ejaculation, a recently developed diagnostic procedure, may provide a new approach to ejaculation-related problems.

Cited by 91 publications

References 23 publications

MR Imaging of the Prostate and Adjacent Anatomic Structures before, during, and after Ejaculation: Qualitative and Quantitative Evaluation

MR Imaging of the Prostate and Adjacent Anatomic Structures before, during, and after Ejaculation: Qualitative and Quantitative Evaluation

Funerary monuments and horse paintings: A preliminary report on the archaeology of a site in the tagant region of South East Mauritania – near Dhar Tichitt

Orgasmic and ejaculatory dysfunction

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