Transrectal ultrasonography in disorders of the seminal vesicles and ejaculatory ducts.Urol Clin North Am. 1989 Nov; 16(4):773-90.UC
Ultrasonography is an inexpensive, noninvasive, and reliable means of evaluating the integrity of the distal seminal tract. A variety of rare congenital anomalies can be demonstrated by ultrasound applied either transabdominally or by the transrectal route. Ultrasonography provides a unique insight into the function and pathology of ejaculation that may affect fertility and may well produce new diagnostic criteria to explain some of the more unusual symptoms encountered by urologists in general practice.