Ch. 2 Ultrasound Instrumentation: Knobology, Imaging Processing, and Storage

Flashcards created from lesson content on ultrasound instrumentation, focusing on controls, functions, and systems.

What is 'knobology' in ultrasound systems?

Knobology refers to the study and understanding of the controls and settings of ultrasound machines to operate them effectively.

How does the electronic 'Worklist' program assist sonographers?

It allows sonographers to query patient information electronically, facilitating procedure tracking and maintaining quality control.

What is the function of the 'Erase/Clear' button on ultrasound systems?

It erases all user-entered annotations from the cursor location.

What determines the selection of imaging frequency in ultrasound?

The imaging frequency is selected based on patient anatomy and the type of examination, with higher frequencies for superficial structures and lower frequencies for deeper structures.

What are the first three items to be selected when beginning a new ultrasound exam?

Patient, Probe, and Preset.

What does Time-Gain Compensation (TGC) do in ultrasound imaging?

It equalizes differences in received echo amplitudes due to reflector depth, amplifying returning echoes from deep in the body.

What is the purpose of the 'Freeze' key on an ultrasound system?

It 'freezes' the image and suspends real-time imaging, allowing for measurements and calculations after storage.

What is PACS and its primary function?

Picture Archiving and Communication System (PACS) stores and views images on a computer or network server in digital format.

What is the difference between 'freeze' and 'cine loop' in ultrasound systems?

Freeze suspends real-time imaging for analysis, whereas cine loop stores recently scanned image frames for review before freezing.

What types of systems does HIS and RIS represent in a clinical setting?

HIS (Hospital Information System) allows communication with patient medical records, while RIS (Radiology Information System) provides images and reports from other imaging examinations.