Single-scan half-fan DECT using static detector modulation: a preliminary study

Junbo Peng

doi:10.1117/12.2604880

4 April 2022 Single-scan half-fan DECT using static detector modulation: a preliminary study

Junbo Peng

Proceedings Volume 12031, Medical Imaging 2022: Physics of Medical Imaging; 120312Z (2022) https://doi.org/10.1117/12.2604880
Event: SPIE Medical Imaging, 2022, San Diego, California, United States

Conference Poster

Abstract

Compared with commercial dual-energy computed tomography (DECT) solutions, beam modulation is an economical and efficient alternative to achieve single-scan DECT which can be enabled with conventional diagnostic or cone-beam CT machines. Existing beam modulation methods employ regularization strategy for DECT reconstruction, which cannot handle the half-fan mode due to inevitable data loss in each spectrum. Besides, all previous works employ primarymodulation scheme, leading to magnified penumbra area in the detector side. In this work, a dedicated beam modulator is attached to the detector surface to realize dual-energy projection acquisition during a single scan. Then the detectormodulated sinogram is fed into the pre-trained pix2pix GAN model to generate full-sampled sinograms at high- and lowenergy spectra. Analytical reconstruction and material decomposition can be subsequently implemented using the complete dual-energy sinogram data.

Citation Download Citation

Junbo Peng "Single-scan half-fan DECT using static detector modulation: a preliminary study", Proc. SPIE 12031, Medical Imaging 2022: Physics of Medical Imaging, 120312Z (4 April 2022); https://doi.org/10.1117/12.2604880

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