Abstract
VTT and Aalto University have supplied thin microstrip detector
prototypes to CMRP for evaluation for the high spatial resolution
dosimetry. The evaluation for dosimetry in microbeam radiation therapy
(MRT) was done in a synchrotron microbeam at ESRF, France. Measurements
studied a response of a single strip on the synchrotron microbeam in
face-on and edge-on modes using CMRP designed and developed readout
electronics for a parallel readout of single strips. Measurements were
done in a passive mode without bias voltage and the detector was scanned
through an array of intensive planar microbeams with the nominal width
of 50 μm. The face-on mode results to a full width at half maximum
(FWHM) of 112 μm and a peak to valley dose ratio (PVDR) of 12. Charge
sharing between the microstrips was observed to be essential due to the
high intensity of the microbeams. In the edge-on mode, the measured FWHM
was observed 100 μm and the PVDR to 500. Based on the results presented
in this paper, the thin microstrip detector is a promising dosimeter
for the high spatial resolution dosimetry in synchrotron MRT.
| Original language | English |
|---|---|
| Pages (from-to) | 1643-1645 |
| Journal | Radiation Measurements |
| Volume | 46 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 2011 |
| MoE publication type | A1 Journal article-refereed |
| Event | 16th Solid State Dosimetry (SSD) Conference - Sydney, Australia Duration: 19 Sept 2010 → 24 Sept 2010 |
Keywords
- Microbeam radiation therapy
- solid-state detector
- thin silicon detector