[header] How to buy an ultrasound machine [title] Determine the ultrasound's use. [step] Ultrasounds are used in a variety of medical practices, including obstetrics, surgery, cardiology, oncology, and endocrinology. The size and type of machine you buy will depend on whether you expect to use it at your home, in your medical office or in a larger healthcare setting. 
[substeps] You will also need machines with different functions depending on the type of practice you have. An obstetrics practice and a general practitioner will need an ultrasound machine that has a large all-purpose probe.