Most of the people associate ultrasound with pregnancy
diagnostics. This may be a popular idea but ultrasound is being widely used in
many other medical treatments and diagnostics like tumors, cancers, kidney
stones and several others. It is interesting to note that ultrasound is not
only used for medical applications but also in industrial field, as a weapon
and as a disintegrating element. Ultrasound is a sound that has a frequency
greater than the upper limit of human hearing. The frequency is approximately
20,000 hertz.
Medical Ultrasonography is one of the main applications of
ultrasound. It is a diagnostic imaging technique that is used to visualize the
internal organs. The size and structure of the organ is analyzed in order to
understand the complications (if there are any) or determine the features and
nature of the organs. Obstetric Sonography is widely used during pregnancy.
In the medical field ultrasound has some effective
therapeutic applications. Treatment of benign and malignant tumors and other
similar disorders is a very common feature. This is done through high intensity
focused ultrasound (HIFU), or focused ultrasound surgery (FUS). The treatment
for tumors is guided by MRI, as in magnetic resonance guided focused
ultrasound.
Ultrasound is used in various applications by varying its
frequency and intensity. More powerful ultrasound is used to clean teeth (in
dental department) or it is used to heat up biological tissues, hence
researchers have devised an effective cure for cancers through ultrasound.
Focused ultrasound is widely used to break the stones that
develop in the kidneys. This method eliminates any possibility of surgery.
Cataract treatment is also possible through ultrasonic Phacoemulsification
(generally less powerful waves are used).
Recently researchers have found various other applications
of low-intensity ultrasound. It has been discovered that it has the ability to
stimulate bone-growth and it is also capable of disrupting the blood-brain
barrier for delivery of the drugs.
Besides that, ultrasound is used for industrial cleaning and
for locating flaws in different materials. They are also used to disintegrate
many microorganisms like bacteria. Killing bacteria in sewage has become very
easy. Ultrasound has been very useful in scaring away the rodents that destroy
many food materials and other objects. Rodents have the capacity to listen
high-frequency sounds also they can be bombarded with ultrasonic waves to get
rid of them. Many nations have also developed ultrasound weapons that are fatal
and capable of causing mass destruction.

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