Ultrasound Imaging Concepts

A safety measure to prevent electrical hazards by ensuring a proper return path for current.

The transducer in ultrasound is the component most likely to pose a small risk to patients due to direct contact.

A unit of measurement used to express the intensity of sound, comparing the final intensity to the original.

The ratio of final intensity to original intensity, often used to describe sound intensity changes.

A trigonometric function that represents the ratio of the opposite side to the hypotenuse in a right triangle.

A trigonometric function that represents the ratio of the adjacent side to the hypotenuse in a right triangle.

Practices ensuring safe operation of ultrasound equipment to mitigate risks to patients.

Angles can be measured using sine and cosine to understand their relationships in trigonometry.

Sound requires a medium to travel, such as air or water.

A wave that transfers energy through a medium by vibrating its particles.

Measured quantities that change during sound wave propagation, including pressure, density, and temperature.

Pressure is defined as force divided by area: P = F/A.

High density occurs at points of compression in sound waves.

Temperature measures the energy within a medium and affects sound speed.

Acoustic variables can be measured in different units like pressure in Pascals.

Waves where particle displacement is parallel to wave direction, like sound waves.

An error in imaging that misrepresents the actual image.

Artifacts can be images that are not real, not present, or incorrectly sized or located.

Artifacts may arise from equipment malfunction, operator error, or physics violations.

Ability to distinguish structures along the axis of the ultrasound beam, dependent on pulse length.

Ability to distinguish structures perpendicular to the axis of the ultrasound beam, related to beam diameter.

A texture seen in imaging that doesn't correspond to actual scatterers in the tissue.

Includes straight sound travel, reflections from main axis, and consistent speed of sound.

The strength of a reflection corresponds to the scattering strength of the reflector.