Physical image quality evaluation of medical radiographs
The noise equivalent quanta (NEQ) has been recommended as a measure of physical quality of medical images. Digitised data of medical radiographs in a previous work have been analysed in terms of resolution via the modulation transfer function (MTF) and noise via the noise power spectrum (NPS), but n...
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Malaysian Institute of Physics
2002
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| Online Access: | http://eprints.utm.my/2502/1/Jurnal_Fizik_Malaysia_23_2002_201-206.pdf http://eprints.utm.my/2502/ |
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| author | Wan Hassan, Wan Muhamad Saridan Munajat, Yusof Sahibuddin, Shamsul |
| author_facet | Wan Hassan, Wan Muhamad Saridan Munajat, Yusof Sahibuddin, Shamsul |
| author_sort | Wan Hassan, Wan Muhamad Saridan |
| building | UTM Library |
| collection | Institutional Repository |
| content_provider | Universiti Teknologi Malaysia |
| content_source | UTM Institutional Repository |
| continent | Asia |
| country | Malaysia |
| description | The noise equivalent quanta (NEQ) has been recommended as a measure of physical quality of medical images. Digitised data of medical radiographs in a previous work have been analysed in terms of resolution via the modulation transfer function (MTF) and noise via the noise power spectrum (NPS), but not in terms of NEQ. As the NEQ is currently regarded as a basic device performance measure of the imaging system, it is very useful to be able to determine it. The average gamma of the radiograph was computed, both the MTF and the NPS data were interpolated and these values were used to compute the NEQ. The computation shows that for spatial frequency range 0–0.7 cycles/mm the NEQ of Lanex Regular/T Mat G screen-film combination is slightly lower than that of Lanex Regular/T Mat L, for 0.7–1.5 cycles/mm the NEQ of both are almost the same, and for frequencies greater than 1.5 cycles/mm the NEQ of the former is greater than that of the latter. |
| format | Article |
| id | my.utm.eprints-2502 |
| institution | Universiti Teknologi Malaysia |
| language | en |
| publishDate | 2002 |
| publisher | Malaysian Institute of Physics |
| record_format | eprints |
| spelling | my.utm.eprints-25022010-06-01T03:03:20Z http://eprints.utm.my/2502/ Physical image quality evaluation of medical radiographs Wan Hassan, Wan Muhamad Saridan Munajat, Yusof Sahibuddin, Shamsul QC Physics The noise equivalent quanta (NEQ) has been recommended as a measure of physical quality of medical images. Digitised data of medical radiographs in a previous work have been analysed in terms of resolution via the modulation transfer function (MTF) and noise via the noise power spectrum (NPS), but not in terms of NEQ. As the NEQ is currently regarded as a basic device performance measure of the imaging system, it is very useful to be able to determine it. The average gamma of the radiograph was computed, both the MTF and the NPS data were interpolated and these values were used to compute the NEQ. The computation shows that for spatial frequency range 0–0.7 cycles/mm the NEQ of Lanex Regular/T Mat G screen-film combination is slightly lower than that of Lanex Regular/T Mat L, for 0.7–1.5 cycles/mm the NEQ of both are almost the same, and for frequencies greater than 1.5 cycles/mm the NEQ of the former is greater than that of the latter. Malaysian Institute of Physics 2002 Article PeerReviewed application/pdf en http://eprints.utm.my/2502/1/Jurnal_Fizik_Malaysia_23_2002_201-206.pdf Wan Hassan, Wan Muhamad Saridan and Munajat, Yusof and Sahibuddin, Shamsul (2002) Physical image quality evaluation of medical radiographs. Jurnal Fizik Malaysia, 23 . pp. 201-206. ISSN 0128-0333 |
| spellingShingle | QC Physics Wan Hassan, Wan Muhamad Saridan Munajat, Yusof Sahibuddin, Shamsul Physical image quality evaluation of medical radiographs |
| title | Physical image quality evaluation of medical radiographs |
| title_full | Physical image quality evaluation of medical radiographs |
| title_fullStr | Physical image quality evaluation of medical radiographs |
| title_full_unstemmed | Physical image quality evaluation of medical radiographs |
| title_short | Physical image quality evaluation of medical radiographs |
| title_sort | physical image quality evaluation of medical radiographs |
| topic | QC Physics |
| url | http://eprints.utm.my/2502/1/Jurnal_Fizik_Malaysia_23_2002_201-206.pdf http://eprints.utm.my/2502/ |
| url_provider | http://eprints.utm.my/ |