Abstract
Since their discovery by Wilhelm Conrad Röntgen in 1895, X-rays have become the most widely available, typically fastest, and usually most cost-effective medical imaging modality today. From the early radiographic approaches using X-ray films as detectors, the portfolio of medical X-ray imaging devices developed into a large range of dedicated instrumentation for various applications. While X-ray imaging has come a long way, there are some physical properties of X-rays, which have not yet been fully exploited, and which may offer quite some room for further enhancements of current X-ray imaging equipment. Firstly, X-ray imaging today is mainly black and white, despite the fact that X-ray generators actually create a full spectrum of X-ray energies, and that the interactions of X-rays that occur within the human body are not the same for all energies and every material. Exploiting these spectral dependencies allows to not only obtain a black and white CT image, but also to obtain more molecularly specific information, which is relevant particularly in oncological precision radiology. The second aspect of X-rays, and so far in radiology mainly neglected and unused, is the physical fact that X-rays can also be interpreted in the wave picture, and not only as presently been done in the particle picture. If interpreted as waves, X-rays—just like visible light—experience a phase shift in matter, and this—if exploited correctly—can produce a new class of X-ray images, which then depict the wave interactions of X-rays with matter, rather than only the attenuating properties, as done until now.
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Abbreviations
- CT:
-
Computed Tomography
- DECT:
-
Dual-Energy CT
- DFC:
-
Dark-field Contrast
- DLCT:
-
Dual-Layer CT
- DPC:
-
Differential Phase-Contrast
- DSCT:
-
Dual-Source CT
- IMD:
-
Iodine Material Density
- KVSCT:
-
Rapid kVp Switching CT
- MRI:
-
Magnetic Resonance Imaging
- SPCCT:
-
Spectral Photon-Counting CT
- VME:
-
Virtual Mono-Energetic
- VNC:
-
Virtual Non-Contrast
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Pfeiffer, D., Pfeiffer, F., Rummeny, E. (2020). Advanced X-ray Imaging Technology. In: Schober, O., Kiessling, F., Debus, J. (eds) Molecular Imaging in Oncology. Recent Results in Cancer Research, vol 216. Springer, Cham. https://doi.org/10.1007/978-3-030-42618-7_1
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