Artifact Correction in Computed Tomography
Artifact correction in computed tomography is a mathematical method to reduce beam hardening and scatter effects that occur during image reconstruction. It improves the quality and accuracy of CT images.
Physical-Chemical Mechanism of Action
In computed tomography (CT), X-rays are directed through the object, and the transmitted rays are measured. However, data acquisition can be compromised by various effects, such as beam hardening and scattered radiation. These effects lead to artifacts in CT images, which complicate interpretation.
Metallurgical Relevance & Welding Risks
In the workshop, accurate analysis of materials and structures is often required. Incorrect or inaccurate CT images can lead to faulty diagnoses, which in turn may result in choosing the wrong welding process or using unsuitable materials. This can lead to worsening damage or an overall failure in the repair process.
Workshop Practice & Action Instructions
To perform artifact correction in CT imaging, follow these steps:
1. Data acquisition: Ensure the CT scan is correctly performed and all necessary parameters are set.
2. Image analysis: Examine the produced images for anomalies or artifacts.
3. Application of correction methods: Use specialized software to apply mathematical correction procedures that reduce beam hardening and scattered radiation effects.
4. Verification of corrected images: Compare the corrected images with the original ones to ensure quality improvement and that no new artifacts have appeared.