Radiographic Image Artifacts and CR Imaging Considerations

A set of flashcards covering key concepts related to radiographic image artifacts, CR imaging considerations, and troubleshooting techniques.

What is the process of digital image formation in radiography?

X-rays -> Excited Electrons -> Light -> Electric Signal -> Numbers.

What is a pixel in digital imaging?

Tiny boxes representing individual data points in a digital image.

What does the term 'matrix' refer to in digital imaging?

Rows and columns of pixels forming the digital image.

What is the significance of image receptor selection in CR vs. DR imaging?

Crucial for optimal image detail and quality.

What is required when using CR for imaging anatomy exceeding 10 cm in thickness?

Grid use to ensure optimal image quality by reducing scatter radiation.

What are the two types of phosphor layers used in CR imaging?

Turbid and Needle.

How does a turbid phosphor layer affect image quality?

Light scatters in all directions, reducing detail.

What is the appearance of a cracked imaging plate on an image?

Areas of increased density.

What causes artifacts from foreign objects on CR images?

Physical contamination of the imaging plate, showing linear or speckled artifacts.

What is backscatter in the context of radiographic imaging?

Radiation scattering back from structures behind the image receptor, resulting in darker areas on the image.

What can cause a distorted or stuttered image during scanning?

Erratic movement of the imaging plate.

What is the cause and appearance of ghosting artifacts?

Incomplete erasure of the imaging plate leading to residual images superimposed on current images.

What is the Moire Effect in imaging?

Undesirable grid lines caused by laser scans along the same lines as the grid.

What should be done if unwanted artifacts are recognized in an image?

Contact a bioengineer to check machine functionality.

What might jewelry worn during an examination do to the radiographic image?

It can appear on images.

What key takeaway should be remembered regarding imaging artifacts?

Artifacts can mimic pathology, indicating the importance of proper technique and equipment maintenance.