Use of Waves in Human Organ Diagnosis
Ultrasonography · X-ray imaging · CT scan
How reflected ultrasound builds a sonogram
How an X-ray photo forms and what it shows
How a CT scan builds 2D and 3D images
Which technique to choose for which check-up
An ultrasonic ruler measures distance from echo time
A fathometer finds the depth of the sea
Doctors use the same principle inside the body
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