PET/CT & ULTRASOUND

PET

Positron emission tomography.

PET/CT Fusion

Involves two techniques that present different types of information about the human body: PET shows metabolic or chemical activity, and CT shows the body's anatomical structures.

PET/CT

At least 1 person working in PET/CT must be a licensed RT.

Bone and Air-filled structures

Strong attenuators that act as barriers to sonography imaging.

Acoustic Shadowing

Helps identify strong attenuators.

Dynamic studies of blood flow

Imaged with Doppler ultrasound.

Main use of Doppler sonography

For vascular studies.

Doppler Effect

A shift in frequency of sound wavelength, caused by relative motion among sources.

Sonography image coloring

Represented as the direction of blood flow.

Ultrasound imaging

Utilizes sound waves to produce images, is noninvasive to human tissue, and very portable.

Sonography

Used mostly in imaging for the diagnosis of OB/GYN patients.

Sound waves

Consist of mechanical vibrations.

Decibel

Used to measure the strength or intensity of the sonography wave.

Transducer

Sends and receives sound waves.

Transducers

Come in various sizes, types, and even as endovaginal and endorectal transducers.

Velocity of sound

Depends on the conducting medium.

Piezoelectric effect

The crystal which produces waves used in sonography, provided by the Curie brothers.