This is an author produced version of a paper published in Medical Physics. This paper has been peer-reviewed but does not include the final publisher proof-corrections or journal pagination. "Prediction of stopping-power ratios in flattening-filter free beams." Abstract 25 Purpose: In recent years, there has been an increasing interest in flattening-filter free (FFF) beams. However, since the ...

Particle therapy is an established method to treat deep-seated tumours using accelerator-produced ion beams. For treatment planning, the precise knowledge of relative stopping power (RSP) within patient vital. Conversion errors from x-ray computed tomography (CT) measurements RSP introduce uncertainties in applied dose distribution. Using a proton (pCT) system measure SP directly could potentia...

We have reported previously that the perpendicular strain produced in the surface layer (several ~ thick) of GaAs (100) crystals under MeV ion irradiation saturates at ""0. 47. regardless of the doping of the specimen, and that the parallel strain is zero within the experimental error. ~n this paper, the perpendicular strain in GaAs (111) and GaAs (110) crystals saturates at 'V0.3%. The ionizat...

BACKGROUND Rapid action stopping leads to global motor suppression. This is shown by studies using transcranial magnetic stimulation to measure corticospinal excitability of task-unrelated effectors (e.g., from the hand during speech stopping). We hypothesize that this global suppression relates to the STN of the basal ganglia. Several STN local field potential studies in PD patients have shown...

Fuzzy Decision Tree (FDT) classifiers combine decision trees with approximate reasoning offered by fuzzy representation to deal with language and measurement uncertainties. When a FDT induction algorithm utilizes stopping criteria for early stopping of the tree's growth, threshold values of stopping criteria will control the number of nodes. Finding a proper threshold value for a stopping crite...