| Craniospinal irradiation using a forward planned segmented field technique. | |
| | |
MedLine Citation:
|
PMID: 17121758 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Craniospinal irradiation is technically demanding due to the complex shape of the planning target volume (PTV). Radiotherapy treatment techniques have evolved over time as imaging and radiotherapy treatment technology have improved. However, most are variations on a class solution utilizing a prone patient position with two shaped lateral cranial portals and a matched posterior spinal portal with moving junctions. Major areas of difficulty remain with the accurate definition of the PTV and achieving a homogeneous dose within it, especially at the junctions. We describe a three-dimensionally (3D) planned craniospinal radiation technique that permits rapid image acquisition with reduced localization time, simplified spinal PTV definition and standardized cranial PTV definition. Improved dose homogeneity within the PTV is achieved by use of a segmented "field-in-field" technique (forward planned intensity-modulated radiotherapy (IMRT)) in place of customized compensators. This has negated the requirement for constructing physical compensators. Autosequencing for field delivery enables the junction to be "moved" during a single fraction and reduces the overall treatment time, an important consideration when treating very young patients. |
| | |
Authors:
|
J M Wilkinson; J Lewis; G P Lawrence; H H Lucraft; E Murphy |
Related Documents
:
|
18253378 - Photoablation and lens damage from fractional talbot images of dammann gratings. 19527908 - Effect of polar interactions on the magnetorheology of silica-coated magnetite suspensi... 12818498 - Influence of magnetic field on the molecular orientation in epitropic mesophase of nitr... 2233218 - Nmr imaging in the earth's magnetic field. 6484168 - Bolus geometry and dynamics after intravenous contrast medium injection. 15604958 - Interobserver reproducibility in the interpretation of bone scans from patients suspect... |
Publication Detail:
|
Type: Evaluation Studies; Journal Article Date: 2006-11-22 |
Journal Detail:
|
Title: The British journal of radiology Volume: 80 ISSN: 1748-880X ISO Abbreviation: Br J Radiol Publication Date: 2007 Mar |
Date Detail:
|
Created Date: 2007-06-05 Completed Date: 2007-07-09 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0373125 Medline TA: Br J Radiol Country: England |
Other Details:
|
Languages: eng Pagination: 209-15 Citation Subset: AIM; IM |
Affiliation:
|
Regional Medical Physics Department, Newcastle General Hospital, Newcastle upon Tyne NE4 6BE, UK. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Brain Neoplasms
/
radiography,
radiotherapy Central Nervous System Neoplasms / radiography, radiotherapy* Cerebellar Neoplasms / radiography, radiotherapy Humans Medulloblastoma / radiography, radiotherapy Particle Accelerators Prone Position Radiotherapy Dosage Radiotherapy Planning, Computer-Assisted / methods* Spinal Neoplasms / radiography, radiotherapy Tomography, X-Ray Computed / methods |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Impact of viability and scar tissue on response to cardiac resynchronization therapy in ischaemic he...
Next Document: A feasibility study of using gold seeds as fiducial markers for bladder localization during radical ...