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Total marrow irradiation using Helic...

Garcia-Fernandez, Lourdes Maria.

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Total marrow irradiation using Helical TomoTherapy.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Total marrow irradiation using Helical TomoTherapy./
作者:	Garcia-Fernandez, Lourdes Maria.
面頁冊數:	145 p.
附註:	Source: Dissertation Abstracts International, Volume: 71-07, Section: B, page: 4319.
Contained By:	Dissertation Abstracts International71-07B.
標題:	Physics, Radiation. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NR63848
ISBN:	9780494638484

Total marrow irradiation using Helical TomoTherapy.
Garcia-Fernandez, Lourdes Maria.

Total marrow irradiation using Helical TomoTherapy. - 145 p.

Source: Dissertation Abstracts International, Volume: 71-07, Section: B, page: 4319.

Thesis (Ph.D.)--Carleton University (Canada), 2010.

Clinical dose response data of human tumours are limited or restricted to a radiation dose range determined by the level of toxicity to the normal tissues. This is the case for the most common disseminated plasma cell neoplasm, multiple myeloma, where the maximum dose deliverable to the entire bony skeleton using a standard total body irradiation (TBI) technique is limited to about 12 Gy. This study is part of scientific background of a phase I/II dose escalation clinical trial for multiple myeloma using image-guided intensity modulated radiotherapy (IG-IMRT) to deliver high dose to the entire volume of bone marrow with Helical TomoTherapy (HT). This relatively new technology can deliver highly conformal dose distributions to complex target shapes while reducing the dose to critical normal tissues.

ISBN: 9780494638484Subjects--Topical Terms:

1019212
Physics, Radiation.

Total marrow irradiation using Helical TomoTherapy.
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520 $a Clinical dose response data of human tumours are limited or restricted to a radiation dose range determined by the level of toxicity to the normal tissues. This is the case for the most common disseminated plasma cell neoplasm, multiple myeloma, where the maximum dose deliverable to the entire bony skeleton using a standard total body irradiation (TBI) technique is limited to about 12 Gy. This study is part of scientific background of a phase I/II dose escalation clinical trial for multiple myeloma using image-guided intensity modulated radiotherapy (IG-IMRT) to deliver high dose to the entire volume of bone marrow with Helical TomoTherapy (HT). This relatively new technology can deliver highly conformal dose distributions to complex target shapes while reducing the dose to critical normal tissues.
520 $a In this study tools for comparing and predicting the effectiveness of different approaches to total marrow irradiation (TMI) using HT were provided. The expected dose response for plasma cell neoplasms was computed and a radiobiological evaluation of different treatment cohorts in a dose escalating study was performed. Normal tissue complication probability (NTCP) and tumour control probability (TCP) models were applied to an actual TMI treatment plan for a patient and the implications of using different longitudinal field widths were assessed. The optimum dose was &sim;39 Gy for which a predicted tumour control of 95% (+/-3%) was obtained, with a predicted 3% (0, 8%) occurrence of radiation pneumonitis. Tissue sparing was seen by using smaller field widths only in the organs of the head. This suggests it would be beneficial to use the small fields in the head only since using small fields for the whole treatment would lead to long treatment times.
520 $a In TMI it may be necessary to junction two longitudinally adjacent treatment volumes to form a contiguous planning target volume PTV. For instance, this is the case when a different SUP-INF spatial resolution is required or when the PTV length exceeds the bed travel distance. In this work, the dosimetric challenges associated with junctioning longitudinally adjacent PTVs with HT were analyzed and the feasibility of PTV junctioning was demonstrated. The benefits of spatially dividing or splitting the treatment into a few sub-treatments along the longitudinal direction were also investigated.
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