If the screen shows a combination of blue and red, it could indicate circular flow, coherent flow, or turbulence. Different shades of blue and red indicate velocity. Lighter shades show higher velocity, and darker shades indicate a lower velocity.
Typically, red and blue colors are used to highlight the blood flow in one direction or the other regarding the probe's position. The speed of the blood flow is shown with a color scale. Usually, blood flow away from the probe is shown in blue, while blood flow toward the probe is red.
On an ultrasound cancerous tissue shows up black and dense tissue is still white, therefore cancers are easier to distinguish.
If you remember that FLUID is always BLACK and TISSUE is GRAY. The denser the tissue, is the brighter white it will appear in ultrasound the brightest white being bone.
Power Doppler is an ultrasound modality, which uses only the amplitude of the Doppler signal to display flow. The Doppler intensity is displayed in colors from red (low intensity) to yellow (high intensity). Power Doppler is angle independent and is not affected by aliasing.
Cysts are often too small to feel. However, on ultrasound they appear as a round clear shape with a distinct outline. Larger cysts can be felt in the breast tissue. They might be firm or soft.
Traditionally, flow towards the transducer is red, flow away from the transducer is blue, and higher velocities are shown in lighter shades. To aid observation of turbulent flow there is a threshold velocity, above which the color changes (in some systems to green).
On ultrasound imaging, an abscess appears as a spherical or oblong anechoic or hypoechoic collection containing hyperechoic debris.
A third color, usually green or yellow, is often used to denote areas of high flow turbulence. These colors are user-definable and may be reversed, however this is generally inadvisable as it may confuse later readers of the images.
The probe and the ultrasound system work together by measuring the liquid component of a tissue, as ultrasounds propagate easily trough the water. On sonography imaging liquids appear black because they are “anechoic”.
Cysts, lumps and tumours will all appear as darker spots on your ultrasound images, compared to the lighter grey and white tissue of the breast. However, a darkened area does not necessarily indicate cancer. Fluid-filled benign cysts and non-cancerous lumps can also be detected by an ultrasound.
Typical malignant cervical lymph nodes are larger in size, rounded in shape (S/L > 0.5), have loss of the echogenic hilum, appear homogenously hypoechoic, demonstrate peripheral or mixed vascularity, and demonstrate high vascular resistance.
Though an ultrasound alone cannot definitively show whether a mass is cancer, the technology is commonly used during the diagnostic process. This is because solid masses and abnormal tissue emit a different echo than fluid-filled cysts and healthy tissue.
Determine the visible side of the body.
Most ultrasound images are mirrored, meaning you see the left side of the body on the left side of the image. If you have a transvaginal ultrasound, though, it uses a straight shot. A straight shot will show the left side of the body on the right side of the image.
The high spatial resolution of ultrasound in the superficial tissues can be a powerful tool for discriminating among the wide range of superficial soft-tissue masses. Epidermal cysts, synovial cysts, bursitis, foreign bodies, lipomas, and pilomatricomas can usually be diagnosed confidently using US (Fig.
Also, be aware that sometimes a blood clot can be anechoic (black) and may appear just like liquid blood. In some cases, there may be an echogenic artifact that may seem like a clot in the lumen of the deep vein. An acute DVT may appear hypoechoic, anechoic, or even isoechoic with the surrounding unclotted blood.
Highly dense tissues such as bone or kidney stones readily reflect echoes and, therefore, appear bright white on an ultrasound. Air, such as in the bowel, also readily reflects echoes. The edge of the bowel, therefore, appears white on an ultrasound.
What is an intracardiac echogenic focus? An intracardiac echogenic focus (ICEF) is a bright white spot seen in the baby's heart during an ultrasound. There can be one or multiple bright spots and they occur when an area of the heart muscle has extra calcium. Calcium is a natural mineral found in the body.
In patients with inflammatory arthritis, ultrasound can detect important clues such as subclinical synovitis, asymptomatic entheseal inflammation, bone erosions, and crystal deposits, which could otherwise be missed in physical examinations [4, 22,23,24,25,26,27,28].
Using US the physician can demonstrate the presence of fluid collections, edema, or soft tissue stranding indicating inflammation. Signs of a deeper infection, such as peri-fascial fluid and subcutaneous emphysema may also be apparent via US imaging.
Blue Color: Blue color indicates blood flow away from the transducer. It is used to represent venous blood flow, which is typically slower and less pulsatile than arterial blood flow.
The color red part of the heart typically represents oxygen-rich blood. The function of this part is to pump oxygenated blood to the rest of the body through the aorta. 2. The color blue part of the heart usually represents oxygen-poor blood.
b) Orange represents oxygenated blood, blue de-oxygenated blood.