Ultrasound probe
Ultrasonic transducers are used for a variety of applications which require different characteristics. An ultrasound transducer transmits ultrasonic waves into the tissue and receives ultrasonic echoes which are reflected from the tissue. The transducer may be placed on a body surface or inserted into a patient's body in a selected imaging region the esophagus. Ultrasonic imaging systems, as commonly used for medical imaging, require an array of ultrasonic transducers contained within a probe to provide steering and focusing of the ultrasonic beam. Ultrasonic diagnostic imaging systems perform ultrasonic imaging and measurements of the human body through the use of ultrasound probes. Ultrasound probes are used to view the internal structure of a body by creating a scan plane or volume, which is produced from an array of transducers. Ultrasound probes are generally used external to the body in non-invasive procedures but can also be used internal to the body being examined during surgical procedures. An ultrasound probe usually comprises at least one transducer element, typically formed of PZT material. One of the more specialized types of ultrasound probes is the transesophageal probe (TEE Probe) which is used endoscopically, for example, for ultrasonic imaging of the heart. Transesophageal echo (TEE) cardiography is an established technique in the area of cardiac imaging and involves the insertion of an ultrasound probe into a subject's esophagus to scan the heart from inside the esophagus. The ultrasound probe employs a transducer array to obtain a two-dimensional cross-sectional image of the subject's heart.
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