Studying the Accuracy of TreatmentPlanning Calculations / (رقم التسجيلة. 164270)
[ عرض عادي ]
| 000 -LEADER | |
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| fixed length control field | 09374nam a2200445Ia 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | OSt |
| 005 - أخر تعامل مع التسجيلة | |
| control field | 20260729153149.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 2310s2022 ua a frm 000 engnd d |
| 040 ## - CATALOGING SOURCE | |
| Original cataloguing agency | EG-EULC |
| Language of cataloging | eng |
| Transcribing agency | EG-EULC |
| Modifying agency | EG-EULC |
| Description conventions | rda |
| 041 0# - LANGUAGE CODE | |
| Language code of text/sound track or separate title | eng |
| Language code of summary or abstract | eng |
| -- | ara |
| 049 ## - Acquisition Source | |
| Acquisition Source | Deposit |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 616.99424 |
| 092 ## - LOCALLY ASSIGNED DEWEY CALL NUMBER (OCLC) | |
| Classification number | 616.99424 |
| Edition number | 21 |
| 097 ## - Degree | |
| Degree | Ph.D |
| 099 ## - LOCAL FREE-TEXT CALL NUMBER (OCLC) | |
| Local Call Number | Cai01.12.04.Ph.D.2022.Ch.S |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Authority record control number or standard number | Chaymaa Ahmed Mohamed Abdullah, |
| Preparation | preparation. |
| 245 ## - TITLE STATEMENT | |
| Title | Studying the Accuracy of TreatmentPlanning Calculations / |
| Statement of responsibility, etc. | by Chaymaa Ahmed Mohamed Abdullah ; Supervisors Prof.Dr.Osiris Wanis Guirguis, Wael Helmy Elsheshtawy, Prof.Dr.Hamed Ibrahim Farag, Prof.Dr.Hassan Shafeik Ali Abou-Elenein. |
| 246 ## - VARYING FORM OF TITLE | |
| Title proper/short title | دراسة دقة حساباث التخطيط العلاجى |
| 264 #0 - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE | |
| Date of production, publication, distribution, manufacture, or copyright notice | 2022. |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 132 p. : |
| Other physical details | illustrations ; |
| Dimensions | 25cm+ |
| Accompanying material | CD |
| 336 ## - CONTENT TYPE | |
| Source | rda content |
| Content type term | text |
| 337 ## - MEDIA TYPE | |
| Source | rdamedia |
| Media type term | Unmediated |
| 338 ## - CARRIER TYPE | |
| Source | rdacarrier |
| Carrier type term | volume |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | Thesis (Ph.D)-Cairo University,2022. |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE | |
| Bibliography, etc. note | Bibliography: p. 129-109. |
| 520 #3 - SUMMARY, ETC. | |
| Summary, etc. | The dosimetric effect due to the presence of air cavity is one of the major concerns for lung cases. When tumors are near air cavities or low density material such as lung are treated with photon beam energy, the surface layers located beyond the low density/tissue interface are under-dosed due to a loss of both lateral and longitudinal electronic equilibrium. Although the Anisotropic Analytical Algorithm (AAA) is more widely used in clinical practice, Acuros XB (AXB) has been found to be more accurately calculate the dose distribution in heterogeneous media. Prediction of clinical outcomes should be based on dose calculation modeling to the patient as accurately as possible. To evaluate that one algorithm is more accurate than the other require knowledge about the actual absorbed dose in case of extreme heterogeneity. The aim of the present study was to investigate the dosimetric performance of Anisotropic Analytical Algorithm (AAA) and Acuros XB (AXB). Also, to evaluate their accuracy in clinical plans of Intensity Modulated Radiation Therapy (IMRT) technique for patients with locally advanced Non-Small Cell Lung Cancer (NSCLC). A heterogeneous phantom to investigate the dose prediction accuracy of AXB and AAA beyond low-density medium by comparing the calculated results with the measurements was used. Also, a special phantom analogous to a lung cancer patient was designed for this study to view the dose distribution inside and around a tumor inside lung tissue using both the Radiochromic EBT-2 films and Thermoluminescent dosimeters (TLDs). Isodose comparison and 2D gamma analysis were used to quantify the agreement between the film measurements and the calculated dose distributions from both AXB and AAA. The algorithms were evaluated for clinical practice as the study included 32 patients with locally advanced NSCLC were subjected to<br/>radiation therapy with IMRT technique. The dose regimen was 60 Gy over 30 fractions. The effects on Planning Target Volume (PTV) and Organ At Risk (OAR) were evaluated using AXB and AAA inpatient’s plans to compare the accuracy of the calculation. Clinically acceptable treatment plans with AAA were re-calculated using AXB algorithm with the two modes of calculation Dose to water (Dw) and Dose to medium (Dm) at the same beam arrangements and multileaf collimator leaf settings as with AAA. The heterogonous phantom study showed that the results of AXB had better agreement with the measurements than AAA and the average dose difference for all points was about 0.5%. Conversely, AAA showed a lower agreement with measured values and the average difference was up to 5.9%. The results of TLDs and films in lung phantom showed that the dose agreement of AXB was within 3% of doses measured with TLD for all measurement points and that gamma analysis of the film measurements passed the ±3%/3 mm criteria with 97.5% passing rate, while, AAA tends to overestimate the dose over both TLDs and films and had a lower agreement. For the clinical cases, the mean differences observed between the AAA, AXB_Dm, and AXB_Dw were statistically significant (p < 0.05), for most of the parameters evaluated. The maximum relative difference was between AXB_Dm and AAA for PTV dose (D98%).Also the percentage dose differences of plans calculated by AAA, AXB_Dw and AAA, AXB_Dm revealed AAA overestimated the dose than AXB. Regarding Organs At Risk (OAR), results showed significant difference between both AAA and AXB_Dw, AAA and AXB_Dm for lungs-PTV as AAA showed higher mean dose, higher V5, V10 and V20 when compared to both AXB modes with p values 0.0001, 0.0001, 0.0001 and 0.0001, respectively. Heart evaluation showed significantly higher mean dose in AAA algorithm with p value 0.0001 in comparison with both AXB modes, however, there was a significant higher difference between AXB_Dw<br/>and AAA in terms of V40 and a non-significant difference for V45 with P values 0.02 and 0.22, respectively. Statistical significance of the maximum dose differences between the AXB_Dw, AXB_Dm and AAA plans was observed for the spinal cord (P = 0.0001), but not for esophagus (p = 0.04 and 0.26). Moreover, mean dose of esophagus was also non significantly in AAA algorithm compared with AXB_Dw (p = 0.17), while for AAA with AXB_Dm there was a significant difference (p = 0.0001). Acuros XB algorithm has accurate dose prediction in heterogeneous medium in comparison to AAA. Differences in dose distribution were observed when plans re-calculated with AXB indicating AAA apparently overestimates dose, particularly the PTV dose. AXB principally predicts lower dose in case of tissue heterogeneity compared to AAA. The AXB algorithm should be used in preference to AAA for cases in which PTVs are involved with tissues of highly different densities, such as lung. |
| 520 #3 - SUMMARY, ETC. | |
| Summary, etc. | يعد تأثير قياس الجرعات بسبب وجود تجويف الهواء أحد الاهتمامات الرئيسية لحالات الرئة. عندما تكون الأورام بالقرب من تجاويف الهواء أو المواد منخفضة الكثافة مثل الرئة يتم علاجها باستخدام طاقة شعاع الفوتون ، فإن الطبقات السطحية الموجودة خارج واجهة الكثافة / الأنسجة منخفضة الجرعة بسبب فقدان كل من التوازن الإلكتروني الجانبي والطولي. على الرغم من أن الخوارزمية التحليلية متباينة الخواص (AAA) تستخدم على نطاق واسع في الممارسة السريرية ، فقد وجد أن Acuros XB (AXB) أكثر دقة في حساب توزيع الجرعة في الوسائط غير المتجانسة. يجب أن يعتمد التنبؤ بالنتائج السريرية على نمذجة حساب الجرعة للمريض بأكبر قدر ممكن من الدقة. لتقييم أن إحدى الخوارزميات أكثر دقة من الأخرى ، يتطلب الأمر معرفة الجرعة الممتصة الفعلية في حالة عدم التجانس الشديد. كان الهدف من هذه الدراسة هو التحقق من أداء قياس الجرعات للخوارزمية التحليلية متباينة الخواص (AAA) و Acuros XB (AXB). أيضًا ، لتقييم دقتها في الخطط السريرية لتقنية العلاج الإشعاعي المعدل الكثافة (IMRT) للمرضى الذين يعانون من سرطان الرئة ذو الخلايا غير الصغيرة المتقدم محليًا (NSCLC). تم استخدام شبح غير متجانس للتحقيق في دقة التنبؤ بالجرعة لـ AXB و AAA خارج الوسط منخفض الكثافة عن طريق مقارنة النتائج المحسوبة مع القياسات. أيضًا ، تم تصميم شبح خاص مشابه لمريض سرطان الرئة لهذه الدراسة لعرض توزيع الجرعة داخل وحول الورم داخل أنسجة الرئة باستخدام كل من أفلام Radiochromic EBT-2 ومقاييس الجرعات الحرارية (TLDs). تم استخدام مقارنة جرعة متساوية وتحليل جاما ثنائي الأبعاد لتحديد الاتفاق بين قياسات الفيلم وتوزيعات الجرعة المحسوبة من كل من AXB و AAA. تم تقييم الخوارزميات من أجل الممارسة السريرية حيث اشتملت الدراسة على 32 مريضاً مصابين بمرض NSCLC المتقدم محلياً |
| 530 ## - ADDITIONAL PHYSICAL FORM AVAILABLE NOTE | |
| Issues CD | Issues also as CD. |
| 546 ## - LANGUAGE NOTE | |
| Text Language | Text in English and abstract in Arabic & English. |
| 650 #1 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Lung tumors |
| 653 #0 - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Treatment Planning System (TPS) |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Osiris Wanis Guirguis |
| Relator term | thesis advisor. |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Wael Helmy Elsheshtaw |
| Relator term | thesis advisor. |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Hamed Ibrahim Farag |
| Relator term | thesis advisor. |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Hassan Shafeik Ali Abou-Elenein. |
| Relator term | thesis advisor. |
| 900 ## - Thesis Information | |
| Grant date | 01-01-2022 |
| Supervisory body | Osiris Wanis Guirguis |
| -- | Wael Helmy Elsheshtawy |
| -- | Hamed Ibrahim Farag |
| -- | Hassan Shafeik Ali Abou-Elenein |
| Universities | Cairo University |
| Faculties | Faculty of Science |
| Department | Department Biophysics |
| 905 ## - Cataloger and Reviser Names | |
| Cataloger Name | Shimaa |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | Thesis |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Source of classification or shelving scheme | Home library | Current library | Date acquired | Inventory number | Full call number | Barcode | Date last seen | Effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|
| Dewey Decimal Classification | المكتبة المركزبة الجديدة - جامعة القاهرة | قاعة الرسائل الجامعية - الدور الاول | 11.02.2024 | 86352 | Cai01.12.04.Ph.D.2022.Ch.S | 01010110086352000 | 30.10.2023 | 30.10.2023 | Thesis |