Let's begin with the upper urinary tract – the kidneys and ureters. Knowing normal anatomy is of course initially necessary to perform an adequate ultrasound examination. You should always scan in two planes (sagittal and transverse). The right kidney is harder to visualize as it is located at the level of T13 and is located in the caudate fossa of the liver.
Sonographic evaluation of the gastrointestinal tract is a routine part of the diagnostic investigation of gastrointestinal disorders. Improved visualization of the GI tract has been achieved due to technologic advances in both ultrasound machines and with the development of higher frequency transducers.