Impact of C.T slice thickness and grid size on dose calculation in different radiotherapy techniques / (Record no. 174905)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 05571namaa22004451i 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | OSt |
| 005 - أخر تعامل مع التسجيلة | |
| control field | 20251027101139.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 251015s2024 ua a|||frm||| 000 0 eng d |
| 040 ## - CATALOGING SOURCE | |
| Original cataloguing agency | EG-GICUC |
| Language of cataloging | eng |
| Transcribing agency | EG-GICUC |
| Modifying agency | EG-GICUC |
| 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 04 - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 612.1181 |
| 092 ## - LOCALLY ASSIGNED DEWEY CALL NUMBER (OCLC) | |
| Classification number | 612.1181 |
| Edition number | 21 |
| 097 ## - Degree | |
| Degree | M.Sc |
| 099 ## - LOCAL FREE-TEXT CALL NUMBER (OCLC) | |
| Local Call Number | Cai01.12.04.M.SC.2024.Na.I |
| 100 0# - MAIN ENTRY--PERSONAL NAME | |
| Authority record control number or standard number | Nawal Ayman Farouk Ahmed, |
| Preparation | preparation. |
| 245 10 - TITLE STATEMENT | |
| Title | Impact of C.T slice thickness and grid size on dose calculation in different radiotherapy techniques / |
| Statement of responsibility, etc. | by Nawal Ayman Farouk Ahmed ; Supervisors Prof. Dr. Haitham Sharaf El-din Mohamed, Dr. Hannan Hussein Amer, Dr. Ahmed Mousa Mohamed. |
| 246 15 - VARYING FORM OF TITLE | |
| Title proper/short title | تأثير سمك صور الأشعه المقطعية والمقاسات الشبكية علي حساب الجرعة الاشعاعية في تقنيات العلاج الاشعاعي المختلفة |
| 264 #0 - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE | |
| Date of production, publication, distribution, manufacture, or copyright notice | 2024. |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 63 pages : |
| Other physical details | illustrations ; |
| Dimensions | 25 cm. + |
| Accompanying material | CD. |
| 336 ## - CONTENT TYPE | |
| Content type term | text |
| Source | rda content |
| 337 ## - MEDIA TYPE | |
| Media type term | Unmediated |
| Source | rdamedia |
| 338 ## - CARRIER TYPE | |
| Carrier type term | volume |
| Source | rdacarrier |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | Thesis (M.Sc)-Cairo University, 2024. |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE | |
| Bibliography, etc. note | Bibliography: pages 57-63. |
| 520 #3 - SUMMARY, ETC. | |
| Summary, etc. | Background: The grid size in radiotherapy can have an impact on dose values. When calculating the dose, slice width is a crucial component to consider. A thinner slice provides for a more precise mean dose estimate than a thicker slice.<br/>Methods: For this study, 35 patients with Head and Neck (H&N) cancer were chosen. Planning Target Volume (PTV) and Organ at Risks (OARs) were optimized using the same criteria. Intensity Modulated Radiation Therapy (IMRT) and volumetric-modulated arc therapy (VMAT) plans, which were designed with slice thicknesses (3,5,7 mm) and grid sizes (2,3,5, 7 and 8 mm). Homogeneity (HI) and Conformity Index (CI), dose points, such as D2%, D50%, and D98% for each OAR, assessed in relation to slice thickness and grid size.<br/>Results: There is a substantial difference (p<0.05) between grid sizes 3mm, 5mm, 7mm, and 8mm in IMRT and VMAT, but no significant difference (p>0.05) in target and OAR dose between grid sizes 2mm and 3mm. Conversely, the target dosage and OAR dose are significantly affected by variations in the Computed Tomography (CT) slice thickness, with a significant difference (p<0.05) seen in the target dose between 3mm, 5mm, and 7mm slice thickness and an insignificant difference (p>0.05) between 5mm and 7mm in OAR dose.<br/>Conclusions: According to this study, using the grid size of 2 mm is not recommended because it generates memory issues in the treatment planning system (TPS) and takes a lot of time, neither of which have a practical clinical effect. |
| 520 #3 - SUMMARY, ETC. | |
| Summary, etc. | خلفيه البحث: يمكن أن يؤثر حجم الشبكة في العلاج الإشعاعي على قيم الجرعة. عند حساب الجرعة، يعد سمك الشريحة عنصرًا بالغ الأهمية يجب مراعاته. توفر الشريحة الأرق تقديرًا أكثر دقة للجرعة المتوسطة من الشريحة الأكثر سمكًا.طريقة البحث: تم اختيار 35 مريضًا مصابين بسرطان الرأس والرقبة لهذه الدراسة. تم تحسين تخطيط حجم الهدف (PTV) والأعضاء المعرضة للخطر (OARs) باستخدام نفس المعايير. تم تصميم خطط العلاج الإشعاعي المعدل الشدة (IMRT) والعلاج بالقوس المعدل الحجمي (VMAT) بسمك شريحة (3،5،7 مم) وأحجام الشبكة (2،3،5، 7 و8 مم). تم تقييم التجانس (HI) ومؤشر المطابقة (CI) ونقاط الجرعة، مثل D2٪ وD50٪ وD98٪ لكل OAR، فيما يتعلق بسمك الشريحة وحجم الشبكة.نتائج البحث: هناك فرق كبير (p <0.05) بين أحجام الشبكة 3 مم و5 مم و7 مم و8 مم في IMRT وVMAT، ولكن لا يوجد فرق كبير (p>0.05) في الجرعة المستهدفة وOAR بين أحجام الشبكة 2 مم و3 مم. وعلى العكس من ذلك، تتأثر الجرعة المستهدفة وجرعة OAR بشكل كبير بالاختلافات في سمك شريحة التصوير المقطعي المحوسب (CT)، مع وجود فرق كبير (p<0.05) في الجرعة المستهدفة بين سمك الشريحة 3 مم و5 مم و7 مم وفرق ضئيل (p>0.05) بين 5 مم و7 مم في جرعة OAR.<br/>استنتاج البحث: وفقًا لهذه الدراسة، لا يُنصح باستخدام حجم الشبكة 2 مم لأنه يولد مشكلات في الذاكرة في نظام تخطيط العلاج (TPS) ويستغرق الكثير من الوقت، ولا يوجد لأي منهما تأثير سريري عملي. |
| 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 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Medical Biophysics |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | الفيزياء الحيوية الطبية |
| 653 #1 - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | C.T Slice |
| -- | Grid |
| -- | Dose Calculation |
| -- | Radiotherapy |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Haitham Sharaf El-din Mohamed |
| Relator term | thesis advisor. |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Hannan Hussein Amer |
| Relator term | thesis advisor. |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Ahmed Mousa Mohamed |
| Relator term | thesis advisor. |
| 900 ## - Thesis Information | |
| Grant date | 01-01-2024 |
| Supervisory body | Haitham Sharaf El-din Mohamed |
| -- | Hannan Hussein Amer |
| -- | Ahmed Mousa Mohamed |
| Universities | Cairo University |
| Faculties | Faculty of Science |
| Department | Department of Biophysics |
| 905 ## - Cataloger and Reviser Names | |
| Cataloger Name | Shimaa |
| Reviser Names | Eman Ghareb |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Koha item type | Thesis |
| Edition | 21 |
| Suppress in OPAC | No |
| 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 | 15.10.2025 | 92188 | Cai01.12.04.M.Sc.2024.Na.I | 01010110092188000 | 15.10.2025 | 15.10.2025 | Thesis |