We present a model of PET system based on high-granularity solid-state detectors inserted into a conventional PET scanner and estimate its performance using a proof-of-concept prototype. A prototype single-slice imaging instrument was constructed with two silicon detectors 1 mm thick, each having 512 1.4 mm × 1.4 mm pads. The silicon detectors were located edgewise on opposite sides and flanked by two non-position sensitive BGO detectors. The scanner performance was measured for its sensitivity, energy, timing, spatial resolution and resolution uniformity.
COBISS.SI-ID: 20750631
Recent progress in the development of micro-cables for very densely packed silicon pad detector modules to be used in a Compton Prostate Probe is reported. The purpose of this development is to optimize the packaging and interconnection of 1mm thick silicon sensors with their readout electronics in such a way that the assembly thickness is dominated by the sensor thickness. Development of micro-cables demonstrate that TAB technology can replace wire bonding technology, which does not allow optimally dense packaging, with TAB bonded modules which have electronically equally good performance.
COBISS.SI-ID: 22527271
A first prostate probe prototype based on the Compton imaging technique has been developed, with a scatter detector composed of a stack of five thick silicon pad detectors, and absorption detector consisting of three Nal(Tl) scintillators placed around the scatter detector. A spatial resolution of 5 mm FWHM has been measured reconstructing an image of a point-like 133 Ba source placed at 11 cm distance from the scatter detector. Additional studies show the improvement of the detector resolution with increasing incident photon energy and distance from the scatter to the absorption detector.
COBISS.SI-ID: 21821223
A very high resolution small animal positron emission tomograph (PET) which can achieve sub-millimeter spatial resolution is being developed using silicon pad detectors. The prototype PET for a single slice instrument consists of two 1 mm thick silicon pad detectors, each containing a 32 × 16 array of 1.4 mm × 1.4 mm pads. Image data were acquired and reconstructed using conventional 2-D filtered-back projection and a maximum likelihood expectation maximization method. Image resolution of approximately 1.45 mm FWHM is obtained from 1-D profile of 1.1 mm diameter 18F line source image.
COBISS.SI-ID: 21368103
In this paper, timing issues related to a PET probe using high-resistivity silicon as a detector material are addressed. Measurements were performed on a simplified model probe, consisting of a single 1-mm thick detector, coupled with two VATAGP7s, application-specific integrated circuits. The detector material and electronics are the same that will be used for the final probe. A very good agreement between the simulation and the measurements were found, indicating reliable performance of the final probe at timing windows down to 20 ns.
COBISS.SI-ID: 23551015