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Measuring system response matrix (SRM) by Monte Carlo method is time and resource consuming, even with high performance computer nodes. In this paper, we exploited symmetry properties available to drastically reduce the complexity in computing SRM of panel PET, which has two parallel panel detectors. By extending the original system and simulating 4 voxels every slice parallel to the PET detector,...
In recent years, panel PET is an interesting field in medical imaging. But the major obstacle of panel PET is the limited view problem. Images reconstructed by traditional algorithms will suffer serious artifacts. Time-of-flight (TOF) information can be incorporated into the image reconstruction to remove the artifacts. However, the best system timing resolution available in current commercial PET...
Recently, there is growing interest in directly digitizing the scintillation pulses in PET detectors. With digital pulse samples, in principle one can apply nontrivial signal analysis software algorithms to either yield better detection performance or more flexibility in detector design. Previously, we have proposed the MVT method for direct scintillation pulse sampling and developed several kinds...
A combined Cerenkov Luminescence Imaging (CLI) and Positron Emission Tomography (PET) scanner for in-vivo imaging of small animals is conceptually designed via all event-by-event readout and multiple-coincidence processing. Strategies and concepts for the design of the combined CLI/PET scanner based on the list-mode scheme are analyzed and modeled in terms of Monte Carlo approach. This allows for...
In our previous work, we have proposed a stationary panel positron emission tomography (PET) for human body imaging. Besides the large solid angle, the panel PET also provides an open geometry which allows other operations being performed simultaneously during a PET scanning. However, the main challenge of panel PET is the limited view problem. Images reconstructed using traditional algorithms will...
Super-resolution (SR) reconstruction technique is mainly a task of reconstructing high resolution images from a sequence of low resolution images. The super-resolution technique for H.264 compressed video has been focused by many researchers recently. This paper briefly analyzes the narrow quantization constraint set method (NQCS), and then, in consideration of motion characteristic information of...
An all-digital positron emission tomography (PET) scanner for imaging small animals has been developed at Huazhong University of Science and Technology (HUST). The implementation of block detector with position sensitive photomultiplier (PSPMT) and multi-voltage threshold (MVT) technology is presented in this paper. The detector comprises 12 basic detector modules (BDMs), which can be used to construct...
In this paper, system composition of low altitude phtotogrammetry based on unmanned airship is introduced in details, especially the key points of refitments of unmanned airship and process of image data. Experiments show that, after technical reconstruction, unmanned airship can make low altitude photogrammetry meet the requirement of large scale mapping, such as 1:1000, 1:500.
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