منابع مشابه
Statistical Based PET Partial Volume Correction
The partial volume effect in Positron Emission Tomography (PET) is a problem for quantitative radiotracer studies. This effect results from the limited spatial resolution of the imaging device (a few mm’s). Two factors are involved; the spillover of radioactivity into neighbouring regions and the underlying tissue inhomogeneity of the particular region. Linear methods are currently used to corr...
متن کاملImage-Based Partial-Volume Correction in SPECT
Introduction and aim: In SPECT imaging, the finite spatial resolution of the imaging system leads to a blurring of the reconstructed image. Consequently, counts originating from each point in the source distribution will be spread out over a volume in the reconstructed image, leading to spill-over of counts between different structures and distortion of the apparent activity concentration. This...
متن کاملPartial Volume Correction in PET/CT
In this thesis, a two-dimensional pixel-wise deconvolution method for partial volume correction (PVC) for combined Positron Emission Tomography and Computer Tomography (PET/CT) imaging has been developed. The method is based on Van Cittert's deconvolution algorithm and includes a noise reduction method based on adaptive smoothing and median filters. Furthermore, a technique to take into account...
متن کاملPartial Volume Correction Strategies in PET.
In the early days of PET, the partial volume effect (PVE) was identified as a serious factor affecting image quality and limiting the accuracy of quantitative analysis. Because of the limited spatial resolution of clinical PET systems, the images are blurred by the system response so that smaller objects appear larger. Although the total number of counts is preserved, they are distributed over ...
متن کاملDown Syndrome Research and Practice Volume 1 Number 2 Pages 72-74
Even fewer studies have been carried out on children with specific forms of learning difficulties. It is important to obtain information on the prevalence of sleep problems and behaviours in children with these specific forms of learning difficulties for two reasons: firstly, it will provide a better understanding of sleep problems and secondly, it will allow intervention strategies to be devel...
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ژورنال
عنوان ژورنال: Journal of the Medical Library Association : JMLA
سال: 2009
ISSN: 1536-5050,1558-9439
DOI: 10.3163/1536-5050.97.1.021a