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High-energy X-ray diffraction experiment employing a compact synchrotron X-ray source based on inverse Compton scattering
This study demonstrates high-energy XRD at an ICS with strongly absorbing mineralogical samples embedded in soft tissue. A quantitative comparison of the measured XRD patterns with calculations of their expected shapes validates the performance of ICSs for XRD. This analysis was performed for two types of kidney stones of different materials. Since these stones are not isolated in a human body, the influence of the surrounding soft tissue on the XRD pattern is investigated and a correction for this soft tissue contribution is introduced.PMID:38631968 | DOI:10.1016/j.zemedi.2024.03.003 (Source: Zeitschrift fur Medizinische Physik)
Source: Zeitschrift fur Medizinische Physik - April 17, 2024 Category: Radiology Authors: Johannes Melcher Martin Dierolf Benedikt G ünther Klaus Achterhold Daniela Pfeiffer Franz Pfeiffer Source Type: research

Intra-fractional lung tumor motion monitoring using arbitrary gantry angles during radiotherapy treatment
This study attempts to answer the question of whether automatic 2D/3D registration is possible using kV images as well as kV-MV image pairs for gantry angles other than the AP direction. We also investigated the effect of additional portal MV images paired with kV images to improve 2D/3D registration in extracting cranio-caudal (CC) and AP displacement at arbitrary gantry angles and different fractions. The kV and MV image sequences as well as 3D volume data from five patients suffering from non-small cell lung cancer undergoing SBRT were used. Diaphragm motion served as the reference signal. The CC and AP displacements re...
Source: Zeitschrift fur Medizinische Physik - April 10, 2024 Category: Radiology Authors: Sepideh Hatamikia Soraya Elmirad Hugo Furtado Gernot Kronreif Elisabeth Steiner Wolfgang Birkfellner Source Type: research

Artificial intelligence in medical physics
Z Med Phys. 2024 Mar 23:S0939-3889(24)00028-X. doi: 10.1016/j.zemedi.2024.03.002. Online ahead of print.NO ABSTRACTPMID:38523040 | DOI:10.1016/j.zemedi.2024.03.002 (Source: Zeitschrift fur Medizinische Physik)
Source: Zeitschrift fur Medizinische Physik - March 24, 2024 Category: Radiology Authors: Steffen Bollmann Thomas K üstner Qian Tao Frank G Z öllner Source Type: research