Advances in ultrasound technology known as the Doppler ultrasonography

In this fallowing article we will discuss the advancement in the ultrasound technology known as the doppler ultrasonography.  We will discuss the clinical features of this machine and the advantages of its use based on my experience as a medical student. Before presenting the edge that this specific technology provides to the field of imaging devices, it is important to cover the ground basics of the US’s mechanism of action.

Ultrasound imaging, also known as sonography, uses sounds waves at various lengths to produce pictures of the internal organs. This allows the diagnosis of several sources of pain, swelling and infection. The test is performed with the use of a small transducer (probe), and the application of water-based gel directly on the patient’s body. This method allows high frequency waves to be transmitted from the probe, through the gel, into the body. Thus, producing a computerized image.

Doppler US is a unique technique, which allows a physician to evaluate blood flow through the patient’s brain, limbs, and various inner organs. A feature which differentiates this advancement from the standard US. A doppler US can estimate how fast blood flows through the vessels by measuring the rate of change in the frequency of the waves.

In my experience as a medical student, this technique is of great importance in the diagnosis of cardiovascular disease. It allows the physician to detect blood clots, poorly functioning valves in the limbs, heart valve defects, congenital heart disease, arterial occlusions, aneurisms, peripheral artery disease, and carotid artery stenosis.

This test is an excellent, non-invasive substitute to more invasive and thus dangerous procedures such as an angiography. Due to the fact that patients with cardiovascular disease tend to have a predisposition for easily injured vessels, the use of a milder option is of utmost importance. Furthermore, this procedure is generally painless. Considering the discomfort that many patients afflicted with ailments such as these tend to be in, this is a huge advantage.

In a situation where an invasive procedure in a specific cardiovascular patient is inevitable, the utilization of the doppler technology does not became redundant. This technique can be used to guide procedures such as needle biopsy’ by supplying a real time image of the dynamicity of blood vessels. Additionally, with knowledge about the speed and volume of the blood flow which can be received from a doppler ultrasound image, a doctor can determine if a patient is a good candidate for an invasive procedure such as an angioplasty.

When properly preformed, the doppler ultrasound can provide a rapid, comprehensive and accurate evaluation of several organs vasculature. Nevertheless, there are several features and limitation in this technology which can obscure the results and that one must be wary of:

  • Calcifications can occur in the vessels as a result of atherosclerosis, which may obstruct the US beam.
  • The speed of the particles and the reflecting and scattering effects can cause false measurements of the rate and volume of the blood flow.
  • The angle incidence which is affected by probe orientation can have a strong effect on the interpretation of the results.

The GE Voluson 730 Expert 4D Ultrasound Machine is an excellent choice for the performance of a doppler ultrasound. The quality of the image this machine produces is outstanding, due to the fact that it contains an SRI (speckle reduction imaging) technology, which helps eliminate artifacts which can construe the results, while allowing a picture of the internal organs at a high contrast resolution. These characteristics are vital for correct clinical assessment. Furthermore, the doppler feature that the GE voluson 730 Expert contains is of a bi-directional nature. This helps the physician to achieve a more exact vasculature study.

One of the greatest advantage of this machine is the simplicity in which this machine can be operated. This machine is characterized with a touch screen. This allows the quick and easy adjustment of the various setting options with the touch of a screen. This also allows a physician to to exit an application that was mistakenly entered through a swift touch. In the hectic hospital environment, this time saving, and convenient feature is crucial.


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