Unfortunately not, no one test is perfect. In order to detect an abnormality, the abnormality must either distort the surrounding normal anatomy or cause the sound beam to travel at a different speed. Ultrasound does not use radiation to obtain an image. Ultrasound is the safest modality to use. It can be used to evaluate a developing fetus and any body part that transmits the sound waves.
Bone blocks the sound waves.
A wide variety of ultrasound examinations are available. Below are descriptions of the most common. Abdominal One of the most common ultrasound examinations is to detect gallstones and inflammation of the gallbladder. Ultrasound is the best test to detect gallstones because of the differences in sound conduction between the solid gallstone and the bile fluid in the gallbladder. People are asked not to eat prior to the examination because in between meals the gallbladder fills with fluid and makes detection of stone easier and reliable.