Operate magnetic resonance imaging scanners. They monitor patient safety and comfort, and view images of area being scanned to ensure quality of pictures. They administer gadolinium contrast dosage intravenously. They interview patient, explain procedures, and position patient on examining table. They enter technical data and patient information into the computer.

Take x rays and CAT scans or administer nonradioactive materials into patient's blood stream for diagnostic purposes. Includes technologists who specialize in other scanning modalities.

Prepare, administer, and measure radioactive isotopes in therapeutic, diagnostic, and tracer studies using a variety of radioisotope equipment. They prepare solutions of radioactive materials and calculate doses to be administered by radiologists. They subject patients to radiation. They execute blood volume, red cell survival, and fat absorption studies.

Produce ultrasonic recordings of internal organs for use by physicians.

Conduct tests on pulmonary or cardiovascular systems of patients for diagnostic purposes. They conduct or assist in electrocardiograms, cardiac catheterizations, pulmonary functions, lung capacity, and similar tests. Includes vascular technologists.

Clean teeth and examine oral areas, head, and neck for signs of oral disease. They educate patients on oral hygiene, take and develop x rays, or apply fluoride or sealants.

Perform routine medical laboratory tests for the diagnosis, treatment, and prevention of disease. They work under the supervision of a medical technologist.

Prepare histologic slides from tissue sections for microscopic examination and diagnosis by pathologists. They assist in research studies.

Stain, mount, and study cells to detect evidence of cancer, hormonal abnormalities, and other pathological conditions following established standards and practices.

Analyze chromosomes found in biological specimens such as amniotic fluids, bone marrow, and blood to aid in the study, diagnosis, or treatment of genetic diseases.