Academic Journal
Development of a chest digital tomosynthesis R/F system and implementation of low‐dose GPU‐accelerated compressed sensing ( CS) image reconstruction
| العنوان: | Development of a chest digital tomosynthesis R/F system and implementation of low‐dose GPU‐accelerated compressed sensing ( CS) image reconstruction |
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| المؤلفون: | Choi, Sunghoon, Lee, Haenghwa, Lee, Donghoon, Choi, Seungyeon, Lee, Chang‐Lae, Kwon, Woocheol, Shin, Jungwook, Seo, Chang‐Woo, Kim, Hee‐Joung |
| المساهمون: | Ministry of Trade, Industry and Energy, Korea Institute for Advancement of Technology |
| المصدر: | Medical Physics ; volume 45, issue 5, page 1871-1888 ; ISSN 0094-2405 2473-4209 |
| بيانات النشر: | Wiley |
| سنة النشر: | 2018 |
| المجموعة: | Wiley Online Library (Open Access Articles via Crossref) |
| الوصف: | Purpose This work describes the hardware and software developments of a prototype chest digital tomosynthesis ( CDT ) R/F system. The purpose of this study was to validate the developed system for its possible clinical application on low‐dose chest tomosynthesis imaging. Methods The prototype CDT R/F system was operated by carefully controlling the electromechanical subsystems through a synchronized interface. Once a command signal was delivered by the user, a tomosynthesis sweep started to acquire 81 projection views ( PV s) in a limited angular range of ±20°. Among the full projection dataset of 81 images, several sets of 21 (quarter view) and 41 (half view) images with equally spaced angle steps were selected to represent a sparse view condition. GPU ‐accelerated and total‐variation ( TV ) regularization strategy‐based compressed sensing ( CS ) image reconstruction was implemented. The imaged objects were a flat‐field using a copper filter to measure the noise power spectrum ( NPS ), a Catphan ® CTP 682 quality assurance ( QA ) phantom to measure a task‐based modulation transfer function ( MTF T ask ) of three different cylinders' edge, and an anthropomorphic chest phantom with inserted lung nodules. The authors also verified the accelerated computing power over CPU programming by checking the elapsed time required for the CS method. The resultant absorbed and effective doses that were delivered to the chest phantom from two‐view digital radiographic projections, helical computed tomography ( CT ), and the prototype CDT system were compared. Results The prototype CDT system was successfully operated, showing little geometric error with fast rise and fall times of R/F x‐ray pulse less than 2 and 10 ms, respectively. The in‐plane NPS presented essential symmetric patterns as predicted by the central slice theorem. The NPS images from 21 PV s were provided quite different pattern against 41 and 81 PV s due to aliased noise. The voxel variance values which summed all NPS intensities were inversely proportional to ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1002/mp.12843 |
| الاتاحة: | http://dx.doi.org/10.1002/mp.12843 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fmp.12843 https://aapm.onlinelibrary.wiley.com/doi/pdf/10.1002/mp.12843 |
| Rights: | http://onlinelibrary.wiley.com/termsAndConditions#vor |
| رقم الانضمام: | edsbas.3C6AAAE9 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1002/mp.12843 |
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