Ultrasound has uses in many areas of gynaecology to assess the pelvic organs.
Sound is easily transmitted through water. For this reason a full bladder can help with visualization of the pelvic organs when looking through the abdominal wall. Often a more accurate image can be obtained by placing the ultrasound transducer into the vagina - an empty bladder is better for this type of examination.
A transducer in the vagina will also give closer proximity to the pelvic organs and give clearer and more detailed images.
Reasons why a gynaecological scan may be requested include: