Grids

Physical Grids

What is the primary function of a physical grid in X-ray imaging?

A physical grid attenuates scatter radiation to reduce scatter and increase contrast resolution. However, it requires an increase in exposure and kVp, leading to an increased patient dose. Proper alignment is essential to avoid image burn-out, and grids can create lines if not oscillating.

Oscillating Grids vs. Stationary Grids

How do wall bucky grids differ from portable grids in preventing grid lines?

wall buckies use oscillating grids. these move back-and-forth or in a circular motion to blur grid lines, minimizing their visibility on X-ray images. Stationary grids, have higher frequency ratios with thinner, closely spaced lead strips to reduce the likelihood of visible lines. Proper alignment is crucial for stationary grids.

Digital Image Processing

How do digital image processing filters improve X-ray images?

Digital image processing uses smoothing and sharpening filters. Smoothing uses averages to replace outliers with mean values to reduce noise, while sharpening enhances edges to differentiate between tissues and background (grey levels_ These processes improve image quality but can lead to over-reliance on post-processing and potential exposure issues.

Physical Grids vs. Digital Processing

What are the advantages of physical grids over digital image processing in X-ray imaging?

Physical grids reduce scatter radiation before it reaches the patient, preventing artifacts and maintaining image quality from the start. Digital processing corrects issues after the fact, meaning scatter radiation has already impacted the patient and possibly created artifacts that can't be fully corrected in post-processing.