1. Proof-of-concept of DosiTest: A virtual multicentric clinical trial for assessing uncertainties in molecular radiotherapy dosimetry
- Author
-
G. Kayal, N. Clayton, A. Vergara-Gil, L. Struelens, and M. Bardiès
- Subjects
Phantoms, Imaging ,Positron-Emission Tomography ,Biophysics ,General Physics and Astronomy ,Humans ,Radiology, Nuclear Medicine and imaging ,General Medicine ,Radiopharmaceuticals ,Radiometry ,Radionuclide Imaging ,Monte Carlo Method - Abstract
Clinical dosimetry in molecular radiotherapy (MRT) is a multi-step procedure, prone to uncertainties at every stage of the dosimetric workflow. These are difficult to assess, especially as some are complex or even impossible to measure experimentally. The DosiTest project was initiated to assess the variability associated with clinical dosimetry, by setting up a 'virtual' multicentric clinical dosimetry trial based on Monte Carlo (MC) modelling. A reference patient model with a realistic geometry and activity input for a specific tracer is considered. Reference absorbed dose rate distribution maps are generated at various time-points from MC modelling, combining precise information on density and activity distributions (voxel wise). Then, centre-specific calibration and patient SPECT/CT datasets are modelled, on which the clinical centres can perform clinical (i.e. image-based) dosimetry. The results of this dosimetric analysis can be benchmarked against the reference dosimetry to assess the variability induced by implementing different clinical dosimetry approaches. The feasibility of DosiTest is presented here for a clinical situation of therapeutic administration of
- Published
- 2021