ultrasound

• - It uses a pulse-echo principle: Pulse meaning source that emits the sound; then Echo means “It has to return”.
• - Uses a high-frequency sound wave.
• - Two energies involve ELECTRICAL and SOUND.
• - Is defined as a Mechanical longitudinal wave.
• GRAYSCALE PICTURE
• - the one that you see on the monitor;
• - basically, the standard feature would be more of BLACK and WHITE and its different shades.
• - Where the origin of the ultrasound is from;
• - A device that detects the depth of the ocean.
• - Means sound Navigation and Ranging
• JACQUES and PIERRE CURRIE
• - They discover the piezoelectric effect.
• KARL THEODORE DUSSIK
• - Performed the first Cranial Ultrasound, however, it was not successful.
• GEORGE D. LUDWIG and FRANCIS W. STRAUTHERS
• - Publicized the first image of Ultrasound.
• Because of sound cannot be seen, it is represented by waves.
• TWO PROPERTIES OF WAVES:
• 1. It transfers energy
• 2. It passes through cyclical variations
• TWO CLASSIFICATIONS OF WAVES
• 1. MECHANICAL WAVE
• - Is a wave that needs a medium to travel
• - MEDIUM – it is the three types of matter; SOLID; LIQUID; and GAS
• TWO TYPES OF MECHANICAL WAVES:
• - TRANSVERSE
• - LONGITUDINAL
• 2. ELECTROMAGNETIC WAVE
• - It does not need a medium
• - It could travel even in the absence of the Types of matter. And you called that as conditioned as VACUUM
• - E.g. of your VACUUM is your X-ray tube.
• - Electromagnetic waves could also pass through a medium.
• FOUR SOUND VARIABLES:
• 1. PRESSURE
• - Concentration of force.
• - UNIT: millimeters of mercury (mmHg), Pascal (Pa), Atmosphere (ATM)
• 2. DENSITY
• - Concentration of medium particles.
• - UNIT: Kilogram per cubic millimeter (kg/mm3)
• 3. TEMPERATURE