Essays about: "Beam profile evaluation"

Showing result 1 - 5 of 7 essays containing the words Beam profile evaluation.

  1. 1. Evaluation of the treatment planning system decimal ElectronRT and custom-made bolus for FLASH-irradiation

    University essay from Lunds universitet/Sjukhusfysikerutbildningen

    Author : Mizgin Coskun; [2022]
    Keywords : Medicine and Health Sciences;

    Abstract : Introduction: The novel external beam therapy technique using ultra-high dose rates known as FLASH has become known for its normal tissue sparing effect. Currently in Lund, veterinary clinical trials are carried out on canine patients using electrons with ultra- high dose rates. READ MORE

  3. 2. Design Study of Welded Beam Bracket According to Stress Concentrations in the Weld

    University essay from KTH/Skolan för industriell teknik och management (ITM)

    Author : FREDRIK EKLUND; [2021]
    Keywords : Plug weld; slot weld; welded beam; welded beam bracket; welded bus chassis; Pluggsvets; svetsad balk; svetsad busschassi; svetsad ram;

    Abstract : In a bus chassis, welded connections are often preferred to other fastening techniques due to low cost and broad competence among suppliers but are usually the weakest parts due to fatigue life. Evaluation of welds is often costly in time and competence. READ MORE

  4. 3. High Accuracy Relative Luminescence Quantum Yield Measurements of Upconverting Nanoparticles

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Atomfysik

    Author : Björn Thomasson; [2016]
    Keywords : Upconverting Nanoparticles; Biomedical imaging; Luminescence tomography; Luminescence imaging; Engineering; Physics; Engineering Physics; Photonics; Cancer; Cancer detection; Cancer diagnostics; Laser Engineering; quantum yield; imaging; upconverting; Biophotonics; Single Point Tomography; Relative Luminescence Quantum Yield Measurements; Energy transfer upconversion; Nanoscience; Luminescence; Imaging of biological tissue; Upconversion; Beam profile evaluation; Beam profile; UCNP; UCNPs; Nanoparticles; Technology and Engineering;

    Abstract : The name Upconverting nanoparticles refers to a novel category of luminescence emitters that are capable of generating visible luminescence upon excitation with noncoherent and longer wavelength monochromatic near-infrared light, at excitation fluence rates as low as 1-103 W/cm2. This unique optical behaviour is of great interest to researchers as it could potentially allow for virtually autofluorescence free luminescence imaging of living tissue. READ MORE

  5. 4. Performance of a Micro-CT System : Characterisation of Hamamatsu X-ray source L10951-04 and flat panel C7942CA-22

    University essay from KTH/Skolan för teknik och hälsa (STH)

    Author : Michael Baumann; [2014]
    Keywords : micro-CT; computed tomography; flat panel; characterisation; performance evaluation; Hamamatsu; image correction;

    Abstract : This master thesis evaluated the performance of a micro-CT system consisting of Hamamatsu microfocus X-ray source L10951-04 and CMOS flat panel C7942CA-22. The X-ray source and flat panel have been characterised in terms of dark current, image noise and beam profile. READ MORE

  6. 5. Utilizing statistical process control analysis and EPID for routine QA of medical linear accelerators

    University essay from Lunds universitet/Sjukhusfysikerutbildningen

    Author : Patrik Andersson; [2011]
    Keywords : Medicine and Health Sciences;

    Abstract : Purpose: The main purposes of this study is to a) evaluate the suitability of a Varian aS1000 EPID as a safe quality assurance device for control of machine specific parameters, such as linac output, beam quality and beam symmetry, and b) to investigate the usefulness of the SPC concept for evaluation of the obtained data. Method and Materials: Measurements were performed using a Varian Clinac 2300iX linear accelerator (Varian, Inc. READ MORE