| LDR | | 02718nmm uu200469 4500 |
| 001 | | 000000333899 |
| 005 | | 20240805174740 |
| 008 | | 181129s2018 |||||||||||||||||c||eng d |
| 020 | |
▼a 9780438021310 |
| 035 | |
▼a (MiAaPQ)AAI10826493 |
| 035 | |
▼a (MiAaPQ)ucla:16841 |
| 040 | |
▼a MiAaPQ
▼c MiAaPQ
▼d 248032 |
| 082 | 0 |
▼a 539 |
| 100 | 1 |
▼a Steers, Jennifer Mariah. |
| 245 | 10 |
▼a Quantifying and Improving Error Sensitivity of Intensity Modulated Radiation Therapy Quality Assurance. |
| 260 | |
▼a [S.l.] :
▼b University of California, Los Angeles.,
▼c 2018 |
| 260 | 1 |
▼a Ann Arbor :
▼b ProQuest Dissertations & Theses,
▼c 2018 |
| 300 | |
▼a 364 p. |
| 500 | |
▼a Source: Dissertation Abstracts International, Volume: 79-10(E), Section: B. |
| 500 | |
▼a Advisers: Daniel A. Low |
| 502 | 1 |
▼a Thesis (Ph.D.)--University of California, Los Angeles, 2018. |
| 520 | |
▼a Purpose: To quantify and elucidate factors affecting error sensitivity in current IMRT QA comparisons performed with the gamma comparison, to investigate causes for gamma comparison insensitivity, and to utilize these results to develop and vali |
| 520 | |
▼a Methods: Over 20,000 gamma comparisons were performed for three detector geometries -- ArcCHECK, MapCHECK, and Delta 4 -- for a variety of IMRT and VMAT cases in the presence of induced errors. Differences in error sensitivity for each device ge |
| 520 | |
▼a Results: Differences in gamma comparison error sensitivity were observed for the ArcCHECK, MapCHECK, and Delta 4 geometries when removing the effects of different spatial sampling for each device. While sensitivity was error type-specific for mo |
| 520 | |
▼a A new method, gradient-dose segmented analysis (GDSA) was developed to allow more clinically meaningful and sensitive IMRT QA comparisons. This method segments the comparison points into regions of high-gradient, high-dose low-gradient, and low- |
| 520 | |
▼a Conclusions: A variety of measurement scenarios were considered in controlled calculation-only comparisons that suggest device-specific and delivery technique-specific gamma criteria may be appropriate in order to achieve similar sensitivity in |
| 590 | |
▼a School code: 0031. |
| 650 | 4 |
▼a Nuclear physics and radiation. |
| 650 | 4 |
▼a Applied physics. |
| 650 | 4 |
▼a Medicine. |
| 690 | |
▼a 0756 |
| 690 | |
▼a 0215 |
| 690 | |
▼a 0564 |
| 710 | 20 |
▼a University of California, Los Angeles.
▼b Biomedical Physics 0119. |
| 773 | 0 |
▼t Dissertation Abstracts International
▼g 79-10B(E). |
| 773 | |
▼t Dissertation Abstract International |
| 790 | |
▼a 0031 |
| 791 | |
▼a Ph.D. |
| 792 | |
▼a 2018 |
| 793 | |
▼a English |
| 856 | 40 |
▼u http://www.riss.kr/pdu/ddodLink.do?id=T14998895
▼n KERIS |
| 980 | |
▼a 201812
▼f 2019 |
| 990 | |
▼a 관리자 |