| Автор | Steven R Meikle |
| Автор | Julian C Matthews |
| Автор | Vincent J Cunningham |
| Автор | Dale L Bailey |
| Автор | Lefteris Livieratos |
| Автор | Terry Jones |
| Автор | Pat Price |
| Дата выпуска | 1998-03-01 |
| dc.description | Spectral analysis is a general modelling approach that enables calculation of parametric images from reconstructed tracer kinetic data independent of an assumed compartmental structure. We investigated the validity of applying spectral analysis directly to projection data motivated by the advantages that: (i) the number of reconstructions is reduced by an order of magnitude and (ii) iterative reconstruction becomes practical which may improve signal-to-noise ratio (SNR). A dynamic software phantom with typical 2-[]thymidine kinetics was used to compare projection-based and image-based methods and to assess bias-variance trade-offs using iterative expectation maximization (EM) reconstruction. We found that the two approaches are not exactly equivalent due to properties of the non-negative least-squares algorithm. However, the differences are small and mainly affect parameters related to early and late time points on the impulse response function ( and, to a lesser extent, VD). The optimal number of EM iterations was 15-30 with up to a two-fold improvement in SNR over filtered back projection. We conclude that projection-based spectral analysis with EM reconstruction yields accurate parametric images with high SNR and has potential application to a wide range of positron emission tomography ligands. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Parametric image reconstruction using spectral analysis of PET projection data |
| Тип | paper |
| DOI | 10.1088/0031-9155/43/3/016 |
| Electronic ISSN | 1361-6560 |
| Print ISSN | 0031-9155 |
| Журнал | Physics in Medicine and Biology |
| Том | 43 |
| Первая страница | 651 |
| Последняя страница | 666 |
| Аффилиация | Steven R Meikle; MRC Cyclotron Unit, Hammersmith Hospital, Royal Postgraduate Medical School, Du Cane Road, London W12 0NN, UK |
| Аффилиация | Julian C Matthews; MRC Cyclotron Unit, Hammersmith Hospital, Royal Postgraduate Medical School, Du Cane Road, London W12 0NN, UK |
| Аффилиация | Vincent J Cunningham; MRC Cyclotron Unit, Hammersmith Hospital, Royal Postgraduate Medical School, Du Cane Road, London W12 0NN, UK |
| Аффилиация | Dale L Bailey; MRC Cyclotron Unit, Hammersmith Hospital, Royal Postgraduate Medical School, Du Cane Road, London W12 0NN, UK |
| Аффилиация | Lefteris Livieratos; MRC Cyclotron Unit, Hammersmith Hospital, Royal Postgraduate Medical School, Du Cane Road, London W12 0NN, UK |
| Аффилиация | Terry Jones; MRC Cyclotron Unit, Hammersmith Hospital, Royal Postgraduate Medical School, Du Cane Road, London W12 0NN, UK |
| Аффилиация | Pat Price; MRC Cyclotron Unit, Hammersmith Hospital, Royal Postgraduate Medical School, Du Cane Road, London W12 0NN, UK |
| Выпуск | 3 |
