Ultrasound imaging or Sonography is used often in medicine. Instead of radiation, the procedure uses high-frequency sound waves to look at organs and structures inside the body.
Ultrasounds are sound waves with frequencies higher than the upper audible limit of human hearing. Ultrasounds are not different from 'normal' (audible) sounds in their physical properties, only in the fact that humans cannot hear it - but even this limit varies from person to person.
Ultrasound devices operate with frequencies from 20 kHz up to several gigahertz. Health care professionals use it to view blood vessels, the heart, kidneys, liver, and many other organs in the body. Doctors most frequently use ultrasounds during pregnancy to view the fetus as it presents a safe, clear picture of the fetus and mother's body.
From Spallanzani's very first fundemental discovery in 1794, to the most recent advancements in the field, see the timeline of how it all happened. Our timeline and historic photos present a quick overview.
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Abdomen • Adrenal Glands • Appendix • Arm • Bile Ducts • Bladder • Blood Vessels • Bowel • Brain • Breast • Cervix • Chest • Fallopian Tube • Eyes • Fetus • Full Body • Gallbladder • Head • Heart • Kidney • Knee • Leg • Liver • Lymph Nodes • Neck • Newborn Infants • Overies • Pancreas • Pelvis • Penis • Prostate • Scrotum • Shoulder • Spleen • Tendon • Testicles • Therapeutic • Thyroid • Tumor • Urinary Tract • Uterus
IMPORTANT: The information on this page, and throughout the entire site, is not intended to provide advice or treatment for a specific situation. Consult your physician and medical team for information and treatment plans on your specific condition(s). Images are shown for illustrative purposes. Do not attempt to draw conclusions or make diagnoses by comparing these image to other medical images, particularly your own.
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