Diagnostic Ultrasound - Abdomen and Pelvis
Testes TESTIS, SAGITTAL VIEW Anatomy: Pelvis Low-level echoes of parenchyma Mediastinum testis Scrotal wall Head of epididymis (with vessels) Intratesticular vessels Testis Tunica albuginea Testis (Top) Sagittal grayscale ultrasound of the normal left testis shows homogeneous, low-level echoes and an echogenic linear structure representing the mediastinum testis. (Middle) Longitudinal color Doppler ultrasound shows normal vascularity of the testis. (Bottom) Sagittal grayscale ultrasound of the right testis shows 2 thin, echogenic layers covering the testis, representing the tunica albuginea, which is the fibrous covering of the testis. 133
Testes Anatomy: Pelvis TESTIS, TRANSVERSE VIEW Tunica albuginea Rete testis Mediastinum testis Scrotal wall Epididymis, body Vessels in pampiniform plexus Right testis Transmediastinal artery Low resistance arterial flow (Top) Transverse grayscale ultrasound of the normal testis shows diffuse low-level internal echoes in the parenchyma, mediastinum testis, and the striated pattern of rete testis. The testis is covered with 2 thin, echogenic layers of tunica albuginea. (Middle) Transverse color Doppler ultrasound again shows normal paucity of testicular vascularity. Some vessels are also identified in the epididymis. More vessels can be identified along the mediastinum testis. (Bottom) Pulsed Doppler ultrasound of an intratesticular artery and the transmediastinal artery shows low resistance with low systolic and end-diastolic flow velocities. 134
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Testes<br />
TESTIS, SAGITTAL VIEW<br />
Anatomy: <strong>Pelvis</strong><br />
Low-level echoes of parenchyma<br />
Mediastinum testis<br />
Scrotal wall<br />
Head of epididymis (with vessels)<br />
Intratesticular vessels<br />
Testis<br />
Tunica albuginea<br />
Testis<br />
(Top) Sagittal grayscale ultrasound of the normal left testis shows homogeneous, low-level echoes <strong>and</strong> an echogenic linear structure<br />
representing the mediastinum testis. (Middle) Longitudinal color Doppler ultrasound shows normal vascularity of the testis. (Bottom)<br />
Sagittal grayscale ultrasound of the right testis shows 2 thin, echogenic layers covering the testis, representing the tunica albuginea,<br />
which is the fibrous covering of the testis.<br />
133
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