Academic Journal
Comparison of testing of collimator and beam alignment, focal spot size with slit camera, and tube current consistency using computed radiography and conventional screen-film systems.
| Τίτλος: | Comparison of testing of collimator and beam alignment, focal spot size with slit camera, and tube current consistency using computed radiography and conventional screen-film systems. |
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| Συγγραφείς: | Meechai T; Department of Radiological Technology, Faculty of Medical Technology, Mahidol University, Thailand., Chousangsuntorn K; Department of Radiological Technology, Faculty of Medical Technology, Mahidol University, Thailand., Owasirikul W; Department of Radiological Technology, Faculty of Medical Technology, Mahidol University, Thailand., Mongkolsuk M; Faculty of Radiological Technology, Rangsit University, Thailand., Iampa W; Department of Radiological Technology, Faculty of Medical Technology, Mahidol University, Thailand. |
| Πηγή: | Journal of applied clinical medical physics [J Appl Clin Med Phys] 2019 Jun; Vol. 20 (6), pp. 160-169. Date of Electronic Publication: 2019 May 16. |
| Τύπος έκδοσης: | Comparative Study; Journal Article |
| Γλώσσα: | English |
| Στοιχεία περιοδικού: | Publisher: Wiley on behalf of American Association of Physicists in Medicine Country of Publication: United States NLM ID: 101089176 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1526-9914 (Electronic) Linking ISSN: 15269914 NLM ISO Abbreviation: J Appl Clin Med Phys Subsets: MEDLINE |
| Imprint Name(s): | Publication: 2017- : Malden, MA : Wiley on behalf of American Association of Physicists in Medicine Original Publication: Reston, VA : American College of Medical Physics, c2000- |
| Ιατρικοί όροι (MeSH): | X-Ray Intensifying Screens*, Film Dosimetry/*instrumentation , Radiographic Image Enhancement/*methods , Radiographic Magnification/*instrumentation , Tomography, X-Ray Computed/*methods, Film Dosimetry/methods ; Calibration ; Humans |
| Περίληψη: | Conversion to a filmless technique of physical performance testing is becoming a topic of much interest to researchers. We assessed the use of a computed radiography (CR) system with postprocessing software as an alternative tool for performing the three physical performance tests of an x-ray tube. Collimator and beam alignment, focal spot size, and milliampere second (mAs) linearity, were performed using a CR system. Results were then compared with those obtained from a conventional screen-film (SF) system. The distances of collimator misalignment measured by the SF system were decreased while peak tube voltage (kVp) was increased (mAs was fixed), whereas those measured by CR were independent of exposure level. The degrees of beam collimator misalignment measured by the CR system were not different from those measured by the SF system. The differences in focal spot dimensions measured by SF and CR systems were less than 4% for large and small focal spot size in both width and length. The mAs linearity evaluated by the SF system agreed with those evaluated by the dose measurement at 50 kVp and 4 mAs, as well as 55 kVp and 3.2 mAs, while the mAs linearity test using the CR system agreed with those using the dose measurement method for all exposure levels. In summary, a CR system could be utilized to assess the three physical performance tests of a single x-ray tube, but required more time than an SF system. Medical physicists with image processing skills were needed to perform the analyses. (© 2019 The Authors. Journal of Applied Clinical Medical Physics published by Wiley Periodicals, Inc. on behalf of American Association of Physicists in Medicine.) |
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| Grant Information: | Mahidol University |
| Contributed Indexing: | Keywords: computed radiography; digital imaging; physical performance test; pixel value; quality control of x-ray tube |
| Entry Date(s): | Date Created: 20190517 Date Completed: 20191218 Latest Revision: 20200225 |
| Update Code: | 20260130 |
| PubMed Central ID: | PMC6560249 |
| DOI: | 10.1002/acm2.12600 |
| PMID: | 31095873 |
| Βάση Δεδομένων: | MEDLINE |
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