| Автор | G J Gillen |
| Автор | A T Elliott |
| Дата выпуска | 1992-12-01 |
| dc.description | The accuracy of the analogue to digital conversion (ADC) process is a critical element in the production of high quality SPECT images. Sub-optimal ADC performance can lead to the production of non-uniformities in the projection data which are amplified by the reconstruction process to produce circular artefacts in the transaxial sections. A simple method for the objective, quantitative assessment of ADC differential linearity has been developed. The analytical approach uses the fact that a differential non-linearity in the ADC will produce a non-uniformity in the digitized image which has a well defined periodicity. This can be most clearly demonstrated in the frequency space domain by determining the Fourier transform of a thick profile which is taken through the centre of a flood field image. The accuracy of the method permits deteriorations in the performance of ADCs to be detected well before significant reduction in SPECT image quality are produced. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Quality control of analogue to digital conversion circuitry for artefact-free SPECT imaging |
| Тип | paper |
| DOI | 10.1088/0031-9155/37/12/002 |
| Electronic ISSN | 1361-6560 |
| Print ISSN | 0031-9155 |
| Журнал | Physics in Medicine and Biology |
| Том | 37 |
| Первая страница | 2175 |
| Последняя страница | 2188 |
| Аффилиация | G J Gillen; West of Scotland Health Boards, Dept. of Clinical Phys. & Bioeng., Glasgow, UK |
| Аффилиация | A T Elliott; West of Scotland Health Boards, Dept. of Clinical Phys. & Bioeng., Glasgow, UK |
| Выпуск | 12 |
