Essays about: "range margins"

Showing result 1 - 5 of 27 essays containing the words range margins.

  1. 1. " Optimization of Margins and Plan Robustness for Proton Therapy of Hodgkin’s Lymphoma"

    University essay from Lunds universitet/Sjukhusfysikerutbildningen

    Author : Filip Hörberger; [2022]
    Keywords : Medicine and Health Sciences;

    Abstract : Purpose/Background: Utilizing proton therapy (PT) for treatment of Hodgkin’s lymphoma (HL) has demonstrated favorable features, particularly a reduced dose to organs at risk (OAR) in comparison with photon radiotherapy. However, there is a coherent complexity with PT including its uncertainties, such as range-uncertainties and set-up variations as protons are highly sensitive to tissue density variations within the beam-path. READ MORE

  2. 2. Surface Guided Helical Tomotherapy for Total Marrow Irradiation

    University essay from Lunds universitet/Sjukhusfysikerutbildningen

    Author : Hedda Enocson; [2022]
    Keywords : Medicine and Health Sciences;

    Abstract : Background: Total marrow irradiation (TMI) with helical tomotherapy treatment (HT-TMI) can be used as conditioning regimen for leukemia patients prior to stem cell transplantation by radiating the skeletal tissue. To ensure adequate dose coverage a margin is applied to the clinical target volume (CTV), i.e. planning target volume (PTV) margin. READ MORE

  3. 3. Glacial lakes in the Torneträsk region, northern Sweden, are key to understanding regional deglaciation patterns and dynamics

    University essay from Stockholms universitet/Institutionen för naturgeografi

    Author : Karlijn Ploeg; [2022]
    Keywords : deglaciation; glacial geomorphology; LiDAR; glacial lakes; Torneträsk;

    Abstract : The prospect of sea level rise due to melting ice sheets affirms the urgency of gaining knowledge on ice sheet dynamics during deglaciation. The Fennoscandian Ice Sheet serves as an analogue, whose retreat can be reconstructed from the geomorphological record. READ MORE

  4. 4. On-chip Instrument Access Through System Hierarchy

    University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

    Author : Shashi Kiran Gangaraju; [2021]
    Keywords : Technology and Engineering;

    Abstract : There are many advantages with the development towards Integrated Circuits (ICs) with smaller, faster, and more transistors. However, tighter margins lead to a need of on-chip instruments to test, tune, and configure. These on-chip instruments, which can be in the range of thousands per IC, must be accessed through the life-time. READ MORE

  5. 5. Development of a CFD Boundary Condition to Simulate a Perforated Surface

    University essay from Umeå universitet/Institutionen för fysik

    Author : Medet Kiflemariam; [2021]
    Keywords : Computational Fluid Dynamics; CFD; Boundary Condition; Bleed; Aerospace Engineering; Aeronautical Engineering; Physics;

    Abstract : In aircraft with jet propulsion engine intakes at supersonic speed, strong pressure waves referred to as shockwaves occur, which may interact with any present boundary layers along the intake surface. The adverse pressure gradients associated with Shock Wave-Boundary Layer Interaction (SWBLI) may cause boundary layer flow separation, which can result in disturbances of the flow that can be harmful to the device or decrease engine performance. READ MORE