Image geometric corrections for a new EMCCD-based dual modular x-ray imager
Citation
Qu, B., Huang, Y., Wang, W., Cartwright, A. N., Titus, A. H., Bednarek, D. R., & Rudin, S. (2011). Image Geometric Corrections for a New EMCCD-based Dual Modular X-ray Imager. Conference Proceedings - IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference, 2011, 2634–2637.
Keywords
- EMCCD (Electron-multiplying CCD)
- X-ray Imager
- Image Geometric Corrections
- Dual Modular
- Angiography
- Fluoroscopy
- Image Registration
- Image Stitching
- Fiber Optic Tapers (FOTs)
- XICPCB (X-ray Image Calibration Printed Circuit Board)
- Object Counting Technique
- Image Orientation
- Image Magnification
- Coordinate Translation
Brief
Geometric corrections align the output of a dual modular x-ray imager by adjusting image orientation, magnification, and translational shifts.
Summary
An EMCCD-based dual modular x-ray imager was developed to provide a high dynamic range and an effective pixel size for angiography and fluoroscopy. Due to misalignment between EMCCD sensors and fiber optic tapers, the output images from the two modules of the imager require geometric corrections. A custom-designed, two-layer printed circuit board with grid lines was used as a calibration pattern to correct for misalignment in the imager output. The grid lines provide an accurate reference to enable proper image stitching of the two modules1. The image geometric correction scheme using the calibration board was shown to successfully correct output images from the imager.
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