There are several disadvantages to using ultrasound in medicine, one of which is the potential for operator error. Some machines also produce images with limited resolution.Know More
Ultrasound cannot be used to study any part of the body containing gas, so it is not a useful tool for diagnosing problems of the lung and digestive tract. This type of study is also very limited when used to identify fractures and other problems with the bones.
The CancerQuest website says some ultrasound scans may produce false positives, causing patients to undergo biopsies and other invasive procedures that are not necessary. Ultrasound is also unable to detect calcification of the breast tissue, making it less useful for detecting some forms of breast cancer.Learn more about Diagnostics & Imaging
An ultrasound for the liver is the same type of abdominal ultrasound used to look at the baby in the womb of a pregnant female. A liver ultrasound requires the patient to lie on a table, have gel placed on the skin and have a wand moved over the abdomen.Full Answer >
An ultrasound machine works by transmitting high-frequency soundwaves into the body and detecting waves that get reflected back to the probe after the sound hits dense tissue, according to Craig Freudenrich, Ph.D., of HowStuffWorks. After the probe, called a transducer, receives the reflected soundwaves, two-dimensional or three-dimensional images display on a screen that depicts the machine's calculations.Full Answer >
The earliest an ultrasound can be used when pregnant is about 5 weeks, according to BabyMed. The gestational sac can be seen via a trans-vaginal ultrasound starting at this time.Full Answer >
A renal ultrasound is a safe and noninvasive test that is used to create images of the ureters, bladder and kidney through the use of sound waves. Ideally, it is used to determine the size, condition and shapes of these internal body parts thus eliminating the use of a surgical operation. It allows clear visualization of the internal structures from outside the body.Full Answer >