Display and Image Processing Lecture Notes

These flashcards cover key concepts in display and image processing in ultrasound imaging technology.

What does the scan converter do in ultrasound imaging?

changes the format of data, converting images received from the body into a video format.

What is the difference between preprocessing and postprocessing in ultrasound imaging?

Preprocessing is the manipulation of images before storage, while postprocessing is the manipulation after storage.

What type of display is produced by harmonic imaging?

An image created from sound reflections at twice the frequency of the transmitted sound.

What is Persistent imaging used for?

sequential frames to provide a smooth image and reduce noise.

How does Write (Acoustic) Zoom differ from Read (Non-Acoustic) Zoom?

Write Zoom alters the image during data acquisition, increasing spatial resolution; Read Zoom enlarges already stored image data without improving resolution.

What is the purpose of using contrast agents in ultrasound?

To enhance the visualization of structures, improve signal-to-noise ratio, and assist in detecting low blood flow.

What is the role of the Coded Excitation (CE) in ultrasound imaging?

CE creates long sound pulses with a wide range of frequencies, improving SNR, axial resolution, and spatial resolution.

What is elastography used for in ultrasound?

To assess the mechanical properties of tissues and detect abnormalities such as cancerous tumors.

What are the advantages of using harmonic imaging?

Improved lateral resolution, reduction in artifacts, cyst clearing, and better visualization in patients with large body habitus.

What is PACS and its importance in ultrasound?

Picture Archiving and Communication Systems enable instant access to archived studies and facilitate data sharing across networks.