Abstract: Ultrasonic transmission imaging apparatus utilizing a pair of focused, large aperture transducers colinearly aligned and facing one another on opposite sides of a target. The receiving transducer and transmitting transducer are positioned to have a common focal point within the target. The transmitting transducer is energized by a continuous noncoherent noise source, and ultrasonic images are formed from the intensity modulation of the transmitted ultrasound at the receiving transducer.

Abstract: An ultrasonic apparatus is used for diagnosis and therapy of patients being treated for post-myocardial infarction. The instrument administers treatment prescribed by the physician in response to signs and symptoms continuously being monitored by the diagnostic portion of the instrument. Both the diagnosis and the treatment are non-invasive and atraumatic in nature. The diagnostic portion of the instrument is sensitive to conditions which are potentially hazardous to the patient's life, such as premature ventricular contractions, low cardiac output, and formation of secondary lesions, and initiates treatment capable of reversing these undesirable conditions. An ultrasonic transduer for producing low level ultrasound is positioned upon the chest of the patient and is acoustically coupled to the skin.