Fysikermøtet 2025 NTNU Trondheim

Session

Parallell B2

17 Jun 2025, 10:45

EL5 (Gamle Elektro)

152. Coherent X-ray Diffraction Imaging to Investigate morphology of Calcium Carbonate Microparticles

17/06/2025, 10:45

Oral presentation

Coherent X-ray diffraction imaging (CXDI) is a phase retrieval technique that reconstructs a real-space image from the corresponding Fraunhofer (far-field) diffraction patterns that must be oversampled in the reciprocal space. The measured diffraction patterns of an object are directly related to the Fourier transform of the electron density of the sample. CXDI is a lensless imaging technique...

125. Self-Calibrated Optical Power Measurements Using the PQED and Integrated Photonic Chips

Johanne Heitmann Solheim (Justervesenet)

17/06/2025, 11:00

Oral presentation

The Predictable Quantum Efficient Detector (PQED) is an internationally recognized primary standard for optical power measurements, with its core technology developed entirely in Norway. Led by Justervesenet, the Chip S⋅CALe project focused on producing practically loss-free photodiodes, along with three independent methods to quantify residual losses—shown to be below 10 ppm. These methods...

154. The effect of ultrasound irradiation in nanoparticle diffusion in hydrogels

Pablo M. Blanco (Norwegian University of Science and Technology)

17/06/2025, 11:15

Oral presentation

A major challenge in cancer chemotherapy is the targeted delivery of drugs to tumor cells. Enhanced delivery to tumor tissue can be achieved by loading drugs into nanoparticles (NPs), leveraging the enhanced permeability and retention effect, which promotes NP extravasation into the tumor. However, NPs often accumulate near blood vessels instead of spreading throughout the tissue due to...

147. Assessment of B_0 shimming routines for cervical spinal cord MRI at 7 Tesla

17/06/2025, 11:30

Oral presentation

7T MRI shows great potential for precise imaging of the spinal cord, offering higher resolution and signal-to-noise ratio compared to conventional clinical MR systems. However, increased field strength amplifies field inhomogeneities from magnetic susceptibility differences, potentially degrading diagnostic quality of the images. Shimming is a method to homogenize the magnetic field by sending...

135. Script-based automatic Volumetric Modulated Arc-Therapy (VMAT) planning for Whole Brain RadioTherapy (WBRT) with and without hippocampal avoidance (HA)

Kari Margrethe Gjøsteen Flatmark (Department of physics, NTNU, Trondheim)

17/06/2025, 11:45

Oral presentation

Since 2018, physicists at the radiotherapy department at St. Olavs Hospital, Trondheim, have developed Python scripts for automating VMAT treatment planning in RayStation for several tumor localizations [1,2]. VMAT delivers conform radiation doses to tumor volumes while sparing the nearby organs at risk (OARs). Automation reduces the time spent on planning while keeping, or improving,...

150. Reducing the lateral dose penumbra of therapeutic proton beams using magnetic fields

17/06/2025, 12:00

Oral presentation

Background: Proton beam therapy is a treatment used against cancer. Compared to conventional photon beam treatment it has a superior dose distribution, resulting in the potential to reduce the damage to surrounding healthy tissue while achieving tumor control. While proton beams have steep distal dose falloffs, the lateral dose fall-off broadens at the end of the proton range, due to...