Abstract
We have entered a new era where imaging not only provides information on tumour size and morphology, but also on functional characteristics of the tumour thereby offering valuable insights into tumour biology, e.g. cellularity, metabolism and vascularity. So far, the largest body of evidence exists for positron emission tomography (PET), diffusion-weighted imaging (DWI) and perfusion imaging. DWI has so far mainly proven valuable for response evaluation after CRT, while PET seems to be particularly promising for early evaluation of response. Perfusion CT seems to be of value for assessment of unfavourable tumour characteristics, while dynamic contrast-enhanced MRI may predict and identify responders. Future large and prospective validation will need to determine the definite clinical value of these techniques.
Abbreviations
- ADC:
-
Apparent diffusion coefficient
- AUC:
-
Area under the curve
- CEA:
-
Carcinoembryonic antigen
- CRT:
-
Chemoradiotherapy
- CT:
-
Computed tomography
- DCE:
-
Dynamic contrast enhanced
- DFS:
-
Disease free survival
- DWI:
-
Diffusion-weighted (magnetic resonance) imaging
- FMISO:
-
Fluoromisonidazole
- MRI:
-
Magnetic resonance imaging
- MVD:
-
Microvessel density
- N-stage:
-
Nodal stage
- OS:
-
Overall survival
- PET/FDG-PET:
-
Positron emission tomography/18F-fluorodeoxygenase positron emission tomography
- RI:
-
Response Index
- SUV:
-
Standardized uptake value
- TME:
-
Total mesorectal excision
- TNM:
-
Tumour Node Metastasis
- T-stage:
-
Tumour stage
- TTP:
-
Time to peak
- Ve:
-
Volume of extracellular space
- VEGF:
-
Vascular endothelial growth factor
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Lambregts, D.M.J., Maas, M., Beets-Tan, R.G.H. (2018). Are There Functional Imaging Markers to Consider for Treatment Decision Making?. In: Valentini, V., Schmoll, HJ., van de Velde, C. (eds) Multidisciplinary Management of Rectal Cancer. Springer, Cham. https://doi.org/10.1007/978-3-319-43217-5_17
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