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Potential artifacts associated with the scanning pattern of the EMI scanner
Radiology
|December 1, 1975
Summary
The EMI scanner may miss up to 8% of the head during imaging due to its slice thickness. Adjacent detector overlap can also cause dual imaging artifacts in brain scans.
Area of Science:
- Medical Imaging
- Radiology
- Biomedical Engineering
Background:
- The Electromagentic Induction (EMI) scanner is a key tool in medical diagnostics.
- Understanding scanner geometry is crucial for accurate image acquisition.
Purpose of the Study:
- To identify potential imaging artifacts in the EMI scanner.
- To analyze the impact of scanner geometry on image completeness and accuracy.
Main Methods:
- Analysis of physical and geometrical scanner parameters.
- Calculation of potential missed regions based on nominal slice thickness and focal spot length.
- Evaluation of detector configuration for slice overlap.
Main Results:
- A nominal slice thickness of 1.3 cm and focal spot length of 12 mm can lead to up to 8% of the central head region being missed.
- Simultaneous monitoring by adjacent detectors causes significant overlap, resulting in dual imaging artifacts.
Conclusions:
- Scanner procedure based on nominal EMI slice thickness can result in un-imaged regions.
- Detector configuration in EMI systems can lead to image overlap and dual imaging, affecting diagnostic accuracy.