Prostate biopsy     

Dr Gonzalo E. Díaz Murillo

        Ultrasound - Telemedicine  - Environment        

 
     

 

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Colombia and its radiology cartel

 
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  1. eHealth

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  5. C.A.D Color ultrasound

  6. Colombian Radiology corruption

  7. Air Pollution in Bogotá, Colombia
     

     

Ultrasound definition

First, it is important to understand the definition of sound. Let's see two definitions of sound:

  1. Simple definition: Sound is the perception of vibrations stimulating the ear
  2. Scientific definition of sound: sound is a periodic disturbance in fluids density, or in the elastic strain of a solid, generated by a vibrating object. These waves (vibrations) propagate in two basic ways: longitudinal waves and transverse waves.

 

Simple ultrasound definition

Ultrasound is sound with a frequency over 20,000 Hz, which is about the upper limit of human hearing. Human beings cannot hear ultrasound