Essays about: "cone-beam"

Showing result 26 - 30 of 33 essays containing the word cone-beam.

  1. 26. GPU Monte Carlo scatter calculations for Cone Beam Computed Tomography

    University essay from KTH/Numerisk analys, NA

    Author : Jonas Adler; [2014]
    Keywords : ;

    Abstract : A GPU Monte Carlo code for x-ray photon transport has been implemented and extensively tested. The code is intended for scatter compensation of cone beam computed tomography images. The code was tested to agree with other well known codes within 5% for a set of simple scenarios. READ MORE

  3. 27. Non-local means denoising ofprojection images in cone beamcomputed tomography

    University essay from KTH/Matematisk statistik

    Author : Fredrik Dacke; [2013]
    Keywords : ;

    Abstract : A new edge preserving denoising method is used to increase image quality in cone beam computed tomography. The reconstruction algorithm for cone beam computed tomography used by Elekta enhances high frequency image details, e.g. noise, and we propose that denoising is done on the projection images before reconstruction. READ MORE

  4. 28. The impact of hypoxia on tumour control probability in the high-dose range used in stereotactic body radiation therapy

    University essay from Stockholms universitet/Fysikum

    Author : Emely Lindblom; [2012]
    Keywords : Radiobiological modeling; Hypoxia; Stereotactic body radiotherapy; Hypofractionation; SBRT; Non-small cell lung cancer; NSCLC;

    Abstract : The use of stereotactic body radiation therapy employing few large fractions of radiation dose for the treatment of non-small cell lung cancer has been proven very successful, high values of tumour control probability (TCP) being clinically achieved. In spite of the success of the fractionation schedules currently used, there is a tendency towards reducing the number of fractions for economical and practical reasons, and also for maximizing the comfort of the patients. READ MORE

  5. 29. Evaluation of the Catalyst system for patient positioning during breast cancer treatment

    University essay from Lunds universitet/Sjukhusfysikerutbildningen

    Author : Malin Kügele; [2012]
    Keywords : Medicine and Health Sciences;

    Abstract : Bröstcancer är den vanligaste formen av cancer hos kvinnor. Fler än 7000 diagnostiseras med denna sjukdom varje år i Sverige. En del av behandlingen mot cancern är strålbehandling. READ MORE

  6. 30. 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