The Experts below are selected from a list of 306 Experts worldwide ranked by ideXlab platform
John O.l. Delancey - One of the best experts on this subject based on the ideXlab platform.
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The Axial Location of structural regions in the urethra: a magnetic resonance study in nulliparous women.
Obstetrics and gynecology, 2003Co-Authors: Wolfgang H Umek, Rohna Kearney, Daniel M Morgan, James A Ashton-miller, John O.l. DelanceyAbstract:To define and quantify the appearance and Location of distinct regions of the bladder neck and urethra by using Axial magnetic resonance images from healthy, continent, nulliparous women. Seventy-eight asymptomatic, healthy, nulliparous women (mean age 29.2 +/- 5.4 years) volunteered for this study. All women were proven continent on urodynamic examination. Axial proton density magnetic resonance images of the pelvic floor were analyzed at 5-mm intervals. A geometric origin was established at the internal urethral meatus. The presence or absence of each of six structural regions--the bladder base, bladder neck, striated urethral sphincter, compressor urethrae and urethrovaginal sphincter, perineal membrane, and distal urethra--was then noted in each more distal image. The proportion of women in whom a structural region was seen at each 5-mm interval was recorded. The striated urogenital sphincter was observed at 5-25 mm distal to the bladder base. It was observed 10 and 15 mm below the bladder base in 91% (95% confidence interval [CI] 85%, 98%) and 99% (95% CI 97%, 100%), respectively, of all women. The perineal membrane, marking the distal end of the muscular urethra, was located 20-35 mm distal to the bladder base. The length of the muscular region of the urethra ranged from 20 to 35 mm (mean 24 mm, 95% CI 24, 25 mm). Magnetic resonance images allow the normal appearance and Location of urethral and bladder neck structures to be quantified in healthy, continent, nulliparous women.
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The Axial Location of structural regions in the urethra: a magnetic resonance study in nulliparous women
Obstetrics & Gynecology, 2003Co-Authors: Wolfgang H Umek, Rohna Kearney, Daniel M Morgan, James A Ashton-miller, John O.l. DelanceyAbstract:To identify the anatomic changes that might be associated with impaired urethral function, it is important first to describe the normal variation in urethral morphology in healthy, continent individuals. Histologic studies have been used to describe this variation in vitro1–5; however, interpretation of the results is complicated by the unknown continence status of the donors. When ultrasound,6–8 computed tomography,9 and magnetic resonance10 are used to study urethral morphology in vivo, along with urodynamic studies of the same individuals, they offer the possibility of correlating structure–function relationships in a way that is not usually possible with in-vitro studies. Among these diagnostic imaging modalities, magnetic resonance offers the best soft tissue resolution, and it has been used successfully to examine urethral anatomy.11–15 However, these studies included women with either pathologic conditions of the pelvic floor or symptoms of pelvic floor dysfunction, thus the normal appearance of the urethra in healthy continent women remains unknown. The purpose of this study, therefore, was to define and quantify the appearance of distinct regions of the bladder neck and urethra on Axial magnetic resonance images from healthy, continent, nulliparous women.
Wolfgang H Umek - One of the best experts on this subject based on the ideXlab platform.
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The Axial Location of structural regions in the urethra: a magnetic resonance study in nulliparous women.
Obstetrics and gynecology, 2003Co-Authors: Wolfgang H Umek, Rohna Kearney, Daniel M Morgan, James A Ashton-miller, John O.l. DelanceyAbstract:To define and quantify the appearance and Location of distinct regions of the bladder neck and urethra by using Axial magnetic resonance images from healthy, continent, nulliparous women. Seventy-eight asymptomatic, healthy, nulliparous women (mean age 29.2 +/- 5.4 years) volunteered for this study. All women were proven continent on urodynamic examination. Axial proton density magnetic resonance images of the pelvic floor were analyzed at 5-mm intervals. A geometric origin was established at the internal urethral meatus. The presence or absence of each of six structural regions--the bladder base, bladder neck, striated urethral sphincter, compressor urethrae and urethrovaginal sphincter, perineal membrane, and distal urethra--was then noted in each more distal image. The proportion of women in whom a structural region was seen at each 5-mm interval was recorded. The striated urogenital sphincter was observed at 5-25 mm distal to the bladder base. It was observed 10 and 15 mm below the bladder base in 91% (95% confidence interval [CI] 85%, 98%) and 99% (95% CI 97%, 100%), respectively, of all women. The perineal membrane, marking the distal end of the muscular urethra, was located 20-35 mm distal to the bladder base. The length of the muscular region of the urethra ranged from 20 to 35 mm (mean 24 mm, 95% CI 24, 25 mm). Magnetic resonance images allow the normal appearance and Location of urethral and bladder neck structures to be quantified in healthy, continent, nulliparous women.
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The Axial Location of structural regions in the urethra: a magnetic resonance study in nulliparous women
Obstetrics & Gynecology, 2003Co-Authors: Wolfgang H Umek, Rohna Kearney, Daniel M Morgan, James A Ashton-miller, John O.l. DelanceyAbstract:To identify the anatomic changes that might be associated with impaired urethral function, it is important first to describe the normal variation in urethral morphology in healthy, continent individuals. Histologic studies have been used to describe this variation in vitro1–5; however, interpretation of the results is complicated by the unknown continence status of the donors. When ultrasound,6–8 computed tomography,9 and magnetic resonance10 are used to study urethral morphology in vivo, along with urodynamic studies of the same individuals, they offer the possibility of correlating structure–function relationships in a way that is not usually possible with in-vitro studies. Among these diagnostic imaging modalities, magnetic resonance offers the best soft tissue resolution, and it has been used successfully to examine urethral anatomy.11–15 However, these studies included women with either pathologic conditions of the pelvic floor or symptoms of pelvic floor dysfunction, thus the normal appearance of the urethra in healthy continent women remains unknown. The purpose of this study, therefore, was to define and quantify the appearance of distinct regions of the bladder neck and urethra on Axial magnetic resonance images from healthy, continent, nulliparous women.
James A Ashton-miller - One of the best experts on this subject based on the ideXlab platform.
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The Axial Location of structural regions in the urethra: a magnetic resonance study in nulliparous women.
Obstetrics and gynecology, 2003Co-Authors: Wolfgang H Umek, Rohna Kearney, Daniel M Morgan, James A Ashton-miller, John O.l. DelanceyAbstract:To define and quantify the appearance and Location of distinct regions of the bladder neck and urethra by using Axial magnetic resonance images from healthy, continent, nulliparous women. Seventy-eight asymptomatic, healthy, nulliparous women (mean age 29.2 +/- 5.4 years) volunteered for this study. All women were proven continent on urodynamic examination. Axial proton density magnetic resonance images of the pelvic floor were analyzed at 5-mm intervals. A geometric origin was established at the internal urethral meatus. The presence or absence of each of six structural regions--the bladder base, bladder neck, striated urethral sphincter, compressor urethrae and urethrovaginal sphincter, perineal membrane, and distal urethra--was then noted in each more distal image. The proportion of women in whom a structural region was seen at each 5-mm interval was recorded. The striated urogenital sphincter was observed at 5-25 mm distal to the bladder base. It was observed 10 and 15 mm below the bladder base in 91% (95% confidence interval [CI] 85%, 98%) and 99% (95% CI 97%, 100%), respectively, of all women. The perineal membrane, marking the distal end of the muscular urethra, was located 20-35 mm distal to the bladder base. The length of the muscular region of the urethra ranged from 20 to 35 mm (mean 24 mm, 95% CI 24, 25 mm). Magnetic resonance images allow the normal appearance and Location of urethral and bladder neck structures to be quantified in healthy, continent, nulliparous women.
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The Axial Location of structural regions in the urethra: a magnetic resonance study in nulliparous women
Obstetrics & Gynecology, 2003Co-Authors: Wolfgang H Umek, Rohna Kearney, Daniel M Morgan, James A Ashton-miller, John O.l. DelanceyAbstract:To identify the anatomic changes that might be associated with impaired urethral function, it is important first to describe the normal variation in urethral morphology in healthy, continent individuals. Histologic studies have been used to describe this variation in vitro1–5; however, interpretation of the results is complicated by the unknown continence status of the donors. When ultrasound,6–8 computed tomography,9 and magnetic resonance10 are used to study urethral morphology in vivo, along with urodynamic studies of the same individuals, they offer the possibility of correlating structure–function relationships in a way that is not usually possible with in-vitro studies. Among these diagnostic imaging modalities, magnetic resonance offers the best soft tissue resolution, and it has been used successfully to examine urethral anatomy.11–15 However, these studies included women with either pathologic conditions of the pelvic floor or symptoms of pelvic floor dysfunction, thus the normal appearance of the urethra in healthy continent women remains unknown. The purpose of this study, therefore, was to define and quantify the appearance of distinct regions of the bladder neck and urethra on Axial magnetic resonance images from healthy, continent, nulliparous women.
Rohna Kearney - One of the best experts on this subject based on the ideXlab platform.
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The Axial Location of structural regions in the urethra: a magnetic resonance study in nulliparous women.
Obstetrics and gynecology, 2003Co-Authors: Wolfgang H Umek, Rohna Kearney, Daniel M Morgan, James A Ashton-miller, John O.l. DelanceyAbstract:To define and quantify the appearance and Location of distinct regions of the bladder neck and urethra by using Axial magnetic resonance images from healthy, continent, nulliparous women. Seventy-eight asymptomatic, healthy, nulliparous women (mean age 29.2 +/- 5.4 years) volunteered for this study. All women were proven continent on urodynamic examination. Axial proton density magnetic resonance images of the pelvic floor were analyzed at 5-mm intervals. A geometric origin was established at the internal urethral meatus. The presence or absence of each of six structural regions--the bladder base, bladder neck, striated urethral sphincter, compressor urethrae and urethrovaginal sphincter, perineal membrane, and distal urethra--was then noted in each more distal image. The proportion of women in whom a structural region was seen at each 5-mm interval was recorded. The striated urogenital sphincter was observed at 5-25 mm distal to the bladder base. It was observed 10 and 15 mm below the bladder base in 91% (95% confidence interval [CI] 85%, 98%) and 99% (95% CI 97%, 100%), respectively, of all women. The perineal membrane, marking the distal end of the muscular urethra, was located 20-35 mm distal to the bladder base. The length of the muscular region of the urethra ranged from 20 to 35 mm (mean 24 mm, 95% CI 24, 25 mm). Magnetic resonance images allow the normal appearance and Location of urethral and bladder neck structures to be quantified in healthy, continent, nulliparous women.
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The Axial Location of structural regions in the urethra: a magnetic resonance study in nulliparous women
Obstetrics & Gynecology, 2003Co-Authors: Wolfgang H Umek, Rohna Kearney, Daniel M Morgan, James A Ashton-miller, John O.l. DelanceyAbstract:To identify the anatomic changes that might be associated with impaired urethral function, it is important first to describe the normal variation in urethral morphology in healthy, continent individuals. Histologic studies have been used to describe this variation in vitro1–5; however, interpretation of the results is complicated by the unknown continence status of the donors. When ultrasound,6–8 computed tomography,9 and magnetic resonance10 are used to study urethral morphology in vivo, along with urodynamic studies of the same individuals, they offer the possibility of correlating structure–function relationships in a way that is not usually possible with in-vitro studies. Among these diagnostic imaging modalities, magnetic resonance offers the best soft tissue resolution, and it has been used successfully to examine urethral anatomy.11–15 However, these studies included women with either pathologic conditions of the pelvic floor or symptoms of pelvic floor dysfunction, thus the normal appearance of the urethra in healthy continent women remains unknown. The purpose of this study, therefore, was to define and quantify the appearance of distinct regions of the bladder neck and urethra on Axial magnetic resonance images from healthy, continent, nulliparous women.
Daniel M Morgan - One of the best experts on this subject based on the ideXlab platform.
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The Axial Location of structural regions in the urethra: a magnetic resonance study in nulliparous women.
Obstetrics and gynecology, 2003Co-Authors: Wolfgang H Umek, Rohna Kearney, Daniel M Morgan, James A Ashton-miller, John O.l. DelanceyAbstract:To define and quantify the appearance and Location of distinct regions of the bladder neck and urethra by using Axial magnetic resonance images from healthy, continent, nulliparous women. Seventy-eight asymptomatic, healthy, nulliparous women (mean age 29.2 +/- 5.4 years) volunteered for this study. All women were proven continent on urodynamic examination. Axial proton density magnetic resonance images of the pelvic floor were analyzed at 5-mm intervals. A geometric origin was established at the internal urethral meatus. The presence or absence of each of six structural regions--the bladder base, bladder neck, striated urethral sphincter, compressor urethrae and urethrovaginal sphincter, perineal membrane, and distal urethra--was then noted in each more distal image. The proportion of women in whom a structural region was seen at each 5-mm interval was recorded. The striated urogenital sphincter was observed at 5-25 mm distal to the bladder base. It was observed 10 and 15 mm below the bladder base in 91% (95% confidence interval [CI] 85%, 98%) and 99% (95% CI 97%, 100%), respectively, of all women. The perineal membrane, marking the distal end of the muscular urethra, was located 20-35 mm distal to the bladder base. The length of the muscular region of the urethra ranged from 20 to 35 mm (mean 24 mm, 95% CI 24, 25 mm). Magnetic resonance images allow the normal appearance and Location of urethral and bladder neck structures to be quantified in healthy, continent, nulliparous women.
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The Axial Location of structural regions in the urethra: a magnetic resonance study in nulliparous women
Obstetrics & Gynecology, 2003Co-Authors: Wolfgang H Umek, Rohna Kearney, Daniel M Morgan, James A Ashton-miller, John O.l. DelanceyAbstract:To identify the anatomic changes that might be associated with impaired urethral function, it is important first to describe the normal variation in urethral morphology in healthy, continent individuals. Histologic studies have been used to describe this variation in vitro1–5; however, interpretation of the results is complicated by the unknown continence status of the donors. When ultrasound,6–8 computed tomography,9 and magnetic resonance10 are used to study urethral morphology in vivo, along with urodynamic studies of the same individuals, they offer the possibility of correlating structure–function relationships in a way that is not usually possible with in-vitro studies. Among these diagnostic imaging modalities, magnetic resonance offers the best soft tissue resolution, and it has been used successfully to examine urethral anatomy.11–15 However, these studies included women with either pathologic conditions of the pelvic floor or symptoms of pelvic floor dysfunction, thus the normal appearance of the urethra in healthy continent women remains unknown. The purpose of this study, therefore, was to define and quantify the appearance of distinct regions of the bladder neck and urethra on Axial magnetic resonance images from healthy, continent, nulliparous women.
