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2012年9月7日 星期五

Doppler Ultrasound Imaging


Ultrasound imaging - also referred to as sonography is a medical procedure often carried out in hospitals using high frequency sound waves to map images within the body.

Ultrasound is a non invasive procedure and unlike Xray which uses potentially harmful ionizing radiation, ultrasound is a virtually risk free procedure which is why it is used routinely to scan images of unborn babies.

The other additional benefit of ultrasound is that it captures images in realtime and can show movement within the body, making it ideal to monitor bloodflow within the body.

General ultrasound images are produced in 2d but advances in the technology have meant that images can now be processed in 3d and in some very special instances 4d (movement is recorded)

Doppler Ultrasound Doppler ultrasound is a specialised technique which evaluates the flow of blood around the body as it moves through the body's major veins and arteries.

Currently 3 types of doppler ultrasound are used by physicians.

Colour vascular doppler uses doppler measurements to create a colour pattern which describes the flow of blood through the blood vessel it is measuring.

Power doppler is used to give detailed information of blood flow within deeper blood vessel - located within organs in the body.

Spectral doppler displays doppler measurements graphically instead of using colour patterns.

Common Ultrasound Procedures Ultrasound scanning has a wide spectrum of medical some very common uses for it are to diagnose swelling and infection within the body.

It is also extremely well suited to examining internal organs including:

o heart, liver, gallbladder , spleen, pancreas, kidneys, bladder uterus, ovaries, eyes, thyroid

o Another use for Ultrasound scanning is for guiding a needle thought the body during biopsies (to extract a sample of body cells).

Common Doppler procedures

Some routine doppler ultrasound procedures are:

o Evaluate blockages within blood vessels (blood clots) Evaluate the narrowing of blood vessels caused by plaque

o This information can be used to determine whether a patient would be suitable for a procedure like angioplasty.

What to do if you are having an ultrasound examination

Loose fitting clothing should be worn if you are about to have an ultrasound examination, your physician will ask you to remove your clothes and any jewellery and you will be wear a gown when the procedure is taking place.

In some more specialised ultrasound examinations your doctor may tell you not to eat or drink for a period before your examination. But generally this is not the case for routine examinations.

What does ultrasound equipment look like? An ultrasound scanner consists of a computer and video display, the actual transducer that scans the body looks a bit like a microphone which is attached to the computer console by a cord.

The transducer sends out sound waves and records the returning echo which is then used to create the image. The basic principles are the same as sonar used in submarines and ships.

The great thing about ultrasound imaging is that the image is immediately viewable on the video screen so there is no lag between taking the image and developing it which is the case with xray.




This article has been written by Ross Fraser and talks about doppler ultrasound scanning





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2012年7月22日 星期日

Carotid Ultrasound Imaging And Evaluating Your Stroke Risk


Learning whether you are risk for stroke is very important. If your doctor suspects you may be at risk of having a stroke, he or she will likely send you to have a process known as a carotid ultrasound. This is a painless procedure which can accurately determine your risk of stroke by measuring plaque levels in two veins (the carotid arteries) on your neck. Plaque can build up in your arteries over many years, and consists of fat, minerals and other substances that are carried in the blood. If the build up is too severe, the arteries will become quite narrow and you will be at a high risk of having a stroke and other health problems.

A carotid ultrasound will not only determine whether you are at risk of a stroke, but can also tell whether you need to start following preventive measures even if your current risk of stroke is not very high. The procedure itself is completely painless and similar to the ultrasound process that a woman undergoes during pregnancy.

In general, the test should take less than thirty minutes and requires little preparation before hand. During the test itself, you will generally lie on your back on an exam table while the ultrasound technician runs a device called a transducer over several points of your neck. The transducer will send and receive ultrasound waves to the ultrasound machine, and the results will be displayed on a video screen during the process. After the carotid ultrasound is completed, you should be able to return to your normal activities right away.

You will likely find it difficult to decipher the images from the ultrasound yourself. After the technician and physician has examined the images, however, he or she should be able to have a more informed discussion with you regarding your risk of having a stroke and needed precautions or actions that need to be taken based on this risk level. If a significant level of plaque is found in your arteries, you will not necessarily be destined to have a stroke. Actions can be taken now to both reduce plaque buildup as well as prevent more buildup in your arteries in the future.

A stroke is a debilitating disease, causing major impairments in mobility, the ability to walk and more. Fortunately, modern technology in the form of a carotid ultrasound can help prevent a stroke before it happens and direct people towards preventive measures and lifestyle changes when needed.




If you find the process of a carotid ultrasound interesting, you might also want to learn more about becoming an ultrasound tech, and you can visit this site to learn more: ultrasound technician training.





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2012年7月15日 星期日

Ultrasound Imaging in Sports Medicine


Diagnostic ultrasound imaging in sports medicine has proven to be a reliable imaging modality in a variety of conditions that are often difficult to evaluate using x-ray, computed tomography (CT) scans, or magnetic resonance imaging (MRI). Among its many advantages is that, since it does not use ionizing radiation, it can be repeated throughout the course of treatment of an injury without concern for the total amount of radiation delivered to the patient.

Ultrasound imaging in sports medicine relies on high frequency sound waves that are transmitted to the skin overlying the area of interest such as the wrist, shoulder, or knee. As these waves encounter different tissues, some waves are reflected back to their source while others continue on until they too are reflected. At the source, which is a device known as a transducer, the returning sound waves are converted to electrical impulses that are sent to a computer which uses these impulses to construct an image of the area being evaluated.

As a rule, higher the frequency sound waves will yield more detailed images. The downside to this higher detail is that high frequency sound does not travel beyond a few centimeters in depth. Hence, ultrasound imaging in sports medicine is limited to superficial structures.

Ultrasound imaging is frequently used to diagnose injuries to the the tendons and ligaments (the rotator cuff) of the shoulder. Such injuries are difficult to diagnose using x-rays or MRI but ultrasound, because it is rapid and provides images while the patient performs certain maneuvers such as placing he arm in different positions, can detect even the smallest of injuries.

The wrist is another area that is frequently injured during athletic activities or by repetitive motion injury such as typing. Ultrasound imaging in these cases can detect tears or bruising of the tendons of the wrist and can also detect excess fluid collections in the area of the wrist known as the carpal tunnel.

Many athletic injuries involve the knee or its adjacent muscles and tendons. While ultrasound cannot penetrate bone it is ideally suited for detecting the muscle tears and bruising that usually accompany knee injuries. And, since ultrasound studies can be repeated as often as required, they are an efficient method for evaluating how such injuries are healing.

After the knee and wrist, the most frequent athletic injuries involve the ankle and its attached structures. Ultrasound is a very reliable imaging technology for evaluation of injuries to the Achilles tendon and adjacent tissues.

In addition to the specific structures already mentioned, ultrasound imaging in sports medicine is often used to detect injuries such as bruises or muscle strains or tears. Although such injuries can also be diagnosed with MRI images, ultrasound is the technology of choice because it takes less time to acquire the necessary images. Ultrasound imaging of athletic images is also more cost effective than images obtained with Ct or MRI. The choice of which imaging modality to be used will always rest with the attending physician.

In summary, ultrasound imaging in sports medicine is a valuable diagnostic tool and will remain a vital part of sports medicine for years to come.




Ian Pennington is an accomplished niche website developer and author. To learn more about ultrasound imaging [http://preventingsportsinjuriessite.info/ultrasound-imaging-in-sports-medicine], please visit Preventing Sports Injuries Site [http://preventingsportsinjuriessite.info] for current articles and discussions.





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2012年5月30日 星期三

Doppler Ultrasound Imaging


Ultrasound imaging - also referred to as sonography is a medical procedure often carried out in hospitals using high frequency sound waves to map images within the body.

Ultrasound is a non invasive procedure and unlike Xray which uses potentially harmful ionizing radiation, ultrasound is a virtually risk free procedure which is why it is used routinely to scan images of unborn babies.

The other additional benefit of ultrasound is that it captures images in realtime and can show movement within the body, making it ideal to monitor bloodflow within the body.

General ultrasound images are produced in 2d but advances in the technology have meant that images can now be processed in 3d and in some very special instances 4d (movement is recorded)

Doppler Ultrasound Doppler ultrasound is a specialised technique which evaluates the flow of blood around the body as it moves through the body's major veins and arteries.

Currently 3 types of doppler ultrasound are used by physicians.

Colour vascular doppler uses doppler measurements to create a colour pattern which describes the flow of blood through the blood vessel it is measuring.

Power doppler is used to give detailed information of blood flow within deeper blood vessel - located within organs in the body.

Spectral doppler displays doppler measurements graphically instead of using colour patterns.

Common Ultrasound Procedures Ultrasound scanning has a wide spectrum of medical some very common uses for it are to diagnose swelling and infection within the body.

It is also extremely well suited to examining internal organs including:

o heart, liver, gallbladder , spleen, pancreas, kidneys, bladder uterus, ovaries, eyes, thyroid

o Another use for Ultrasound scanning is for guiding a needle thought the body during biopsies (to extract a sample of body cells).

Common Doppler procedures

Some routine doppler ultrasound procedures are:

o Evaluate blockages within blood vessels (blood clots) Evaluate the narrowing of blood vessels caused by plaque

o This information can be used to determine whether a patient would be suitable for a procedure like angioplasty.

What to do if you are having an ultrasound examination

Loose fitting clothing should be worn if you are about to have an ultrasound examination, your physician will ask you to remove your clothes and any jewellery and you will be wear a gown when the procedure is taking place.

In some more specialised ultrasound examinations your doctor may tell you not to eat or drink for a period before your examination. But generally this is not the case for routine examinations.

What does ultrasound equipment look like? An ultrasound scanner consists of a computer and video display, the actual transducer that scans the body looks a bit like a microphone which is attached to the computer console by a cord.

The transducer sends out sound waves and records the returning echo which is then used to create the image. The basic principles are the same as sonar used in submarines and ships.

The great thing about ultrasound imaging is that the image is immediately viewable on the video screen so there is no lag between taking the image and developing it which is the case with xray.




This article has been written by Ross Fraser and talks about doppler ultrasound scanning





This post was made using the Auto Blogging Software from WebMagnates.org This line will not appear when posts are made after activating the software to full version.

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2012年5月4日 星期五

Doppler Ultrasound Imaging


Ultrasound imaging - also referred to as sonography is a medical procedure often carried out in hospitals using high frequency sound waves to map images within the body.

Ultrasound is a non invasive procedure and unlike Xray which uses potentially harmful ionizing radiation, ultrasound is a virtually risk free procedure which is why it is used routinely to scan images of unborn babies.

The other additional benefit of ultrasound is that it captures images in realtime and can show movement within the body, making it ideal to monitor bloodflow within the body.

General ultrasound images are produced in 2d but advances in the technology have meant that images can now be processed in 3d and in some very special instances 4d (movement is recorded)

Doppler Ultrasound Doppler ultrasound is a specialised technique which evaluates the flow of blood around the body as it moves through the body's major veins and arteries.

Currently 3 types of doppler ultrasound are used by physicians.

Colour vascular doppler uses doppler measurements to create a colour pattern which describes the flow of blood through the blood vessel it is measuring.

Power doppler is used to give detailed information of blood flow within deeper blood vessel - located within organs in the body.

Spectral doppler displays doppler measurements graphically instead of using colour patterns.

Common Ultrasound Procedures Ultrasound scanning has a wide spectrum of medical some very common uses for it are to diagnose swelling and infection within the body.

It is also extremely well suited to examining internal organs including:

o heart, liver, gallbladder , spleen, pancreas, kidneys, bladder uterus, ovaries, eyes, thyroid

o Another use for Ultrasound scanning is for guiding a needle thought the body during biopsies (to extract a sample of body cells).

Common Doppler procedures

Some routine doppler ultrasound procedures are:

o Evaluate blockages within blood vessels (blood clots) Evaluate the narrowing of blood vessels caused by plaque

o This information can be used to determine whether a patient would be suitable for a procedure like angioplasty.

What to do if you are having an ultrasound examination

Loose fitting clothing should be worn if you are about to have an ultrasound examination, your physician will ask you to remove your clothes and any jewellery and you will be wear a gown when the procedure is taking place.

In some more specialised ultrasound examinations your doctor may tell you not to eat or drink for a period before your examination. But generally this is not the case for routine examinations.

What does ultrasound equipment look like? An ultrasound scanner consists of a computer and video display, the actual transducer that scans the body looks a bit like a microphone which is attached to the computer console by a cord.

The transducer sends out sound waves and records the returning echo which is then used to create the image. The basic principles are the same as sonar used in submarines and ships.

The great thing about ultrasound imaging is that the image is immediately viewable on the video screen so there is no lag between taking the image and developing it which is the case with xray.




This article has been written by Ross Fraser and talks about doppler ultrasound scanning





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