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Any diagnostic evaluation using radioactive (unstable) isotopes. This diagnosis includes many nuclear medicine procedures as well as radioimmunoassay…

Methods and procedures for the diagnosis of diseases of the respiratory tract or its organs. It includes RESPIRATORY FUNCTION TESTS.

Methods and procedures for the diagnosis of diseases or dysfunction of the urinary tract or its organs or demonstration of its physiological processe…

Tests for central hearing disorders based on the competing message technique (binaural separation).

Laboratory testing and diagnostic imaging services offered to consumers outside of the patient-physician relationship.

BREATH HOLDING; VASOCONSTRICTION; and a drop in HEART RATE in response to submersion of the face in cold water.

Elicitation of extreme vertigo upon lateral movement of a patient's head when lying in a supine position

Endoscopy of the small intestines accomplished while advancing the endoscope into the intestines from the stomach by alternating the inflation of two…

The process of observing, recording, or detecting the effects of a chemical substance administered to an individual therapeutically or diagnostically.

Methods of investigating the effectiveness of anticancer cytotoxic drugs and biologic inhibitors. These include in vitro cell-kill models and cytosta…

Endoscopic examination, therapy or surgery of the luminal surface of the duodenum.

Methods to identify and characterize cancer in the early stages of disease and predict tumor behavior.

Methods to determine in patients the nature of a disease or disorder at its early stage of progression. Generally, early diagnosis improves PROGNOSIS…

Earlier than planned termination of clinical trials.

Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues. The standard approach is transthoracic.

Measurement of intracardiac blood flow using an M-mode and/or two-dimensional (2-D) echocardiogram while simultaneously recording the spectrum of the…

Echocardiography applying the Doppler effect, with the superposition of flow information as colors on a gray scale in a real-time image.

Echocardiography applying the Doppler effect, with velocity detection combined with range discrimination. Short bursts of ultrasound are transmitted …

Dynamic three-dimensional echocardiography using the added dimension of time to impart the cinematic perception of motion. (Mayo Clin Proc 1993;68:22…

A method of recording heart motion and internal structures by combining ultrasonic imaging with exercise testing (EXERCISE TEST) or pharmacologic str…

Echocardiography amplified by the addition of depth to the conventional two-dimensional ECHOCARDIOGRAPHY visualizing only the length and width of the…

Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues using a transducer placed in the esophagus.

Use of reflected ultrasound in the diagnosis of intracranial pathologic processes.

Use of electric potential or currents to elicit biological responses.

Recording of the moment-to-moment electromotive forces of the HEART as projected onto various sites on the body's surface, delineated as a scalar fun…

Method in which prolonged electrocardiographic recordings are made on a portable tape recorder (Holter-type system) or solid-state device (real-time …

Recording of brain electrical activities in which the electrodes are placed directly on the CEREBRAL CORTEX.

Diagnosis of disease states by recording the spontaneous electrical activity of tissues or organs or by the response to stimulation of electrically e…

Recording of electric currents developed in the brain by means of electrodes applied to the scalp, to the surface of the brain, or placed within the …

Adjustment of BRAIN WAVES from two or more neuronal groups within or across a brain structure (e.g., cortical and limbic brain structures) to become …