In physics, the word ultrasound refers to a sound with a frequency that cannot be heard by humans. Ultrasound/ Sonography imaging, therefore, uses sound waves to provide pictures inside a body so as to diagnose the cause of pain, infection or swelling in the internal organs. It can also be used to examine the condition of a fetus in pregnant women as well as the brains and hips of infants. Primarily, this technology can also be used to guide health practitioners during biopsies, diagnose heart conditions, and assess damages after a heart attack (Hamdi, Boughariou, Guedri, & Boussofara, 2016). Today, ...
Essays on Sound WAVES
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Radiography can be defined as the science of making film records from X-rays, also known as radiographs of the human body’s internal anatomy, by exposing a film that has been sensitized to electromagnetic radiation to the body. It is with these photographs that a record is made out of the findings which are used for examination in the diagnostic processes (Hertrich, 2005). It was formally referred as ‘plain’ X-rays but was switched to the use of electromagnetic radiation because it is the suitable general term that covers the other types of medical imaging like ultrasound. Radiography is usually ...
Chapter 1 – Introduction to Color Study
1. What is the difference between direct light and reflected light? Give examples of each. Direct light travels from the source to the destination without being interrupted while reflected light is the light produced when the direct light bounces off a material. One example of direct light is the sunlight while reflection from the mirror is an example of reflected light (Young, Freedman & Ford, pp. 1080). 2. Describe the cause of color, the means used to generate it, and the effect. Light consists of a spectrum of light wavelengths which have a representative color; thus, upon reaching the retina ...
The heat was intense. The orange light shone on the desert, drying up the remaining puddles of water into vapour, rising into the atmosphere. A lizard crawled slowly, almost dying, parched and with a hide so leather like, one would think it was crisp fried. Slowly, I heard the intense ringing of the siren. Waaang waaaang waaang. It was time to get inside our shelters. The shelters were not made of concrete. Unlike the olden days, concrete was the material of choice. All buildings were once made from stone, from cement mixed with water to form hard solid blocks. ...