What is attenuation artifact mean?

What is attenuation artifact mean?

“Attenuation artifact” observed in a nuclear stress test is due to the reduction in the intensity / strength of signal when it travels through various body tissues of different densities, such as breast tissues, chest wall, and organs under the diaphragm.

What does diaphragmatic attenuation mean?

Abstract. Avoidance of falsely positive results depends on distinguishing reality from artifact, in turn depending on images of highest quality. In radionuclide cardiac imaging, an inferior wall artifactual defect, so called “diaphragmatic attenuation”, is particularly common and vexing.

What does artifact mean on a stress test?

Answer • An artifact, in this context, is anything that can keep the test from being interpreted correctly. People often think of medical tests as definitive — the stress test shows that either you have blockages in the arteries in your heart or you don’t — but it usually is not so clear.

What does breast artifact mean?

Breast artifacts are the most frequent causes of false positive planar images in female subjects. Superimposition of breast tissue over the heart may result in linear areas of relatively increased activity, which is believed to be caused by small-angle scatter from the breast tissue fold.

What does mild attenuation mean?

a : a lessening in amount, force, magnitude, or value : weakening Sound can travel thousands of kilometers in this planar acoustic waveguide with little attenuation.—

How does attenuation affect an image?

Attenuation in ultrasound is the reduction in amplitude of the ultrasound beam as a function of distance through the imaging medium. Accounting for attenuation effects in ultrasound is important because a reduced signal amplitude can affect the quality of the image produced.

What is increased attenuation?

The increased lung attenuation pattern develops when the amount of air in the airspaces and in the lumen of the airways decreases (resulting from lung volume decrease or from partial or total filling of the airspaces) and when the soft tissue structures increase in size and/or amount, two phenomena that often occur …

What is an artifact in the heart?

Electrocardiograph (EKG) artifacts are defined as EKG abnormalities, which are a measurement of cardiac potentials on the body surface and are not related to electrical activity of the heart. As a result of artifacts, normal components of the EKG can be distorted.

What does artifact mean on heart monitor?

What is an artifact in medical terms?

In medical imaging, artifacts are misrepresentations of tissue structures produced by imaging techniques such as ultrasound, X-ray, CT scan, and magnetic resonance imaging (MRI). Physicians typically learn to recognize some of these artifacts to avoid mistaking them for actual pathology.

What does artifact mean in medical terms?

What is attenuation correction?

Attenuation correction is a mechanism that removes soft tissue artifacts from SPECT images. The size of the patient and the amount of tissue between the heart and the detector lead to attenuation artifacts that adversely affect the image of the heart.

What does attenuation artifact mean?

Attenuation artifact means a loss of signal due to absorption by body tissue (bone or soft tissue) and is not due to a blockage. Anterior wall artifacts are extremely common in women because of attenuation by breast tissue. A “fixed” perfusion defect is one that is seen both at rest and post-stress.

What is attenuation artifact in breast reconstruction?

Attenuation artifact means a loss of signal due to absorption by body tissue (bone or soft tissue) and is not due to a blockage. Anterior wall artifacts are extremely common in women because of attenuation by breast tissue.

What is an anteroapical perfusion defect?

“Anteroapical” refers to the front tip of the heart. A perfusion defect can mean there is a blockage in an artery, there has been a heart attack previously, or sometimes the defect is just a function of the test not being perfect and the images are just not well seen.

What is attenuation artifact in cardiac stress test?

A breast attenuation artifact is an abnormality seen on images taken during a cardiac stress test. This artifact is generally a benign finding and is caused by the shadow cast by breast tissue over the cardiac tissue being tested. Attenuation artifact errors are the most common errors seen during cardiac…