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Different Types Of Doppler UltrasoundUltrasound uses high-frequency sound waves to capture images of the internal organs. As these sound waves are beamed into the body, return echoes are produced that are recorded to visualize internal structures such as muscles, tendons, and other internal organs. You can determine the size, structure and any pathological lesions with real time tomographic images. This technique can be very useful for seeing the interface between solid and fluid filled spaces. This non-invasive medical imaging test helps physicians diagnose and treat medical conditions.
Recent developments in ultrasound technology include three-dimensional ultrasound that formats the sound wave data into 3-D images. Four-dimensional ultrasound is a further advanced technology that displays 3-D ultrasound in motion.
Doppler ultrasound, a special ultrasound technique enables doctors to evaluate blood flow through a blood vessel, including the body's major arteries and veins in the abdomen, arms, legs and neck. This method is used to evaluate symptoms such as pain, swelling or infection. For examining different internal organs such as heart and blood vessels, liver, gallbladder, spleen, pancreas, kidneys, bladder, uterus, ovaries, and fetus in pregnant patients, thyroid and parathyroid glands and scrotum ultrasound is used.
The three different types of Doppler ultrasound are:
§ Color Doppler: Computer system is used to convert Doppler measurements into an array of colors to enable visualization of blood vessels to measure the speed and direction of blood flow through it.
§ Power Doppler, a new and more sensitive technique than color Doppler is used when the blood flow is little or minimal. This technique provides detailed information about blood flow. However, doctors cannot determine the direction of blood flow using this method.
§ Spectral Doppler: Blood flow measurements can be displayed graphically, in terms of the distance traveled per unit of time.
Doppler ultrasound images can
help the physician evaluate blockages to blood flow, narrowing of vessels,
tumors and congenital malformation. Depending on the results, doctors can
determine if the patient can undergo other tests or not.
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