Sonography, or ultrasound, is a diagnostic imaging technique that uses high-frequency sound waves to create images of internal organs and tissues.

Preparation varies by the type of ultrasound. For some, you may need to drink water and avoid eating beforehand. Follow the specific instructions given.

Yes, sonography is a safe, non-invasive procedure that does not use radiation. It is commonly used in various medical evaluations.

Sonography is considered very safe with no known risks. It does not involve radiation and is widely used for many diagnostic purposes.

Yes, sonography is commonly used during pregnancy for monitoring fetal development and health. It is a standard and safe practice.

Recovery times vary but are generally shorter than traditional surgery. Most patients can return to normal activities within a few days to weeks.

AV fistulas are preferred because they last longer, have a lower risk of infection, and provide better blood flow for dialysis.