دورية أكاديمية
Application of Chang's attenuation correction technique for single-photon emission computed tomography partial angle acquisition of Jaszczak phantom
| العنوان: | Application of Chang's attenuation correction technique for single-photon emission computed tomography partial angle acquisition of Jaszczak phantom |
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| المؤلفون: | Krishnendu Saha, Sean C Hoyt, Bryon M Murray |
| المصدر: | Journal of Medical Physics, Vol 41, Iss 1, Pp 29-33 (2016) |
| بيانات النشر: | Wolters Kluwer Medknow Publications, 2016. |
| سنة النشر: | 2016 |
| المجموعة: | LCC:Medical physics. Medical radiology. Nuclear medicine |
| مصطلحات موضوعية: | American College of Radiology testing, attenuation correction, single-photon emission computed tomography, Medical physics. Medical radiology. Nuclear medicine, R895-920 |
| الوصف: | The acquisition and processing of the Jaszczak phantom is a recommended test by the American College of Radiology for evaluation of gamma camera system performance. To produce the reconstructed phantom image for quality evaluation, attenuation correction is applied. The attenuation of counts originating from the center of the phantom is greater than that originating from the periphery of the phantom causing an artifactual appearance of inhomogeneity in the reconstructed image and complicating phantom evaluation. Chang's mathematical formulation is a common method of attenuation correction applied on most gamma cameras that do not require an external transmission source such as computed tomography, radionuclide sources installed within the gantry of the camera or a flood source. Tomographic acquisition can be obtained in two different acquisition modes for dual-detector gamma camera; one where the two detectors are at 180° configuration and acquire projection images for a full 360°, and the other where the two detectors are positioned at a 90° configuration and acquire projections for only 180°. Though Chang's attenuation correction method has been used for 360° angle acquisition, its applicability for 180° angle acquisition remains a question with one vendor's camera software producing artifacts in the images. This work investigates whether Chang's attenuation correction technique can be applied to both acquisition modes by the development of a Chang's formulation-based algorithm that is applicable to both modes. Assessment of attenuation correction performance by phantom uniformity analysis illustrates improved uniformity with the proposed algorithm (22.6%) compared to the camera software (57.6%). |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 0971-6203 1998-3913 |
| Relation: | http://www.jmp.org.in/article.asp?issn=0971-6203;year=2016;volume=41;issue=1;spage=29;epage=33;aulast=Saha; https://doaj.org/toc/0971-6203; https://doaj.org/toc/1998-3913 |
| DOI: | 10.4103/0971-6203.177278 |
| URL الوصول: | https://doaj.org/article/6d93baec78d54431920df531bdb04620 |
| رقم الأكسشن: | edsdoj.6d93baec78d54431920df531bdb04620 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 09716203 19983913 |
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| DOI: | 10.4103/0971-6203.177278 |