Essays about: "ımrt"

Showing result 11 - 15 of 21 essays containing the word ımrt.

1. 11. Initial steps toward MRI-based treatment planning for external radiotherapy

   University essay from Lunds universitet/Sjukhusfysikerutbildningen

   Author : Sara Thörnqvist; [2009]
   Keywords : Strålterapi; Medicine and Health Sciences;

   Abstract : "Introduction; The aim of this study was to examine the possibilities for MRI-based radiotherapy treatment planning. The work included evaluation of geometric image distortions in MR-images, investigations of how segmentation of bone could be performed from images acquired with the ultra short time of echo (UTE) pulse sequence and assessment of dosimetric differences between treatment planning based on these images as compared to the original CT-based treatment plans. READ MORE

3. 12. Comparison of IMRT delivery techniques and helical Tomo Therapy using Pareto front evaluation

   University essay from Lunds universitet/Sjukhusfysikerutbildningen

   Author : Hunor Benedek; [2009]
   Keywords : Strålterapi; Medicine and Health Sciences;

   Abstract : Purpose: The purpose of this work was to explore the possibility to compare treatment-planning- and treatment-delivery systems for intensity modulated radiation therapy (IMRT) using an objective approach. The approach investigated was the Pareto front concept. READ MORE

4. 13. Developement and evaluation of methods for comparison of dose distributions in radiotherapy using calculated, synthetic and simulated measured dose distributions

   University essay from Lunds universitet/Sjukhusfysikerutbildningen

   Author : Jonas Bengtsson Scherman; [2009]
   Keywords : Strålterapi; Medicine and Health Sciences;

   Abstract : ntensity modulated radiation therapy (IMRT) is becoming a more and moreused technique in radiation therapy. The main reason for this is that IMRT treament delivers a more conformal dose to the target together with a better sparing of organs at risk. READ MORE

5. 14. Clinical Investigations of Image Guided Radiation Therapy for Prostate Cancer with an On-Board Imager

   University essay from Medicinsk strålningsfysik (tills m KI)

   Author : Maria Lindskog; [2008]
   Keywords : Cone-beam CT; IGRT; Adaptive radiotherapy;

   Abstract : The daily uncertainty concerning tumor localization is one of the major problems during the course of radiation therapy. Image guided-radiation therapy (IGRT) can be used to improve the localization and adjustment of the planning target volume. READ MORE

6. 15. Commissioning and validation of small subfields in Step-and-shoot IMRT

   University essay from Medicinsk strålningsfysik (tills m KI)

   Author : Nils Andræ; [2008]
   Keywords : Radiotherapy Planning; Radiotherapy; Intensity-Modulated; IMRT; Commissioning; Small fields;

   Abstract : One of the most used irradiation techniques in modern radiation therapy is step-and-shoot IMRT. The accuracy of this technique when delivering complex dose distributions strongly depends on the size of the subfields. READ MORE