No cuts or needles are necessary for ultrasounds, which are typically painless. The transducer of the ultrasound machine merely touches the patient's skin over the area being investigated. Through the gel and into the body, the probe transmits high-frequency sound waves that are then picked up by the transducer. These sound waves are then used by a computer to create an image, which is subsequently shown on a screen. Instead than using radiation like other screening methods do, ultrasounds employ sound waves and echoes to create images called sonograms. Patients don't receive ionising radiation as a result, making the process safer than X-rays and CT scans.
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