Publications by authors named "S F Petit"
Background: Nursing home residents experience a large burden of invasive methicillin-resistant Staphylococcus aureus (MRSA) infections. Data are limited regarding nursing home characteristics associated with differences in facility-level invasive MRSA rates.
Methods: We analyzed 2011-2015 data from CDC's Emerging Infections Program (EIP) active population- and laboratory-based surveillance for invasive MRSA cases within seven states.
Evaluation of artificial intelligence-based autosegmentation for a high-performance cone-beam computed tomography imaging system in the pelvic region.
Phys Imaging Radiat Oncol
January 2025
Background And Purpose: A novel ring-gantry cone-beam computed tomography (CBCT) imaging system shows improved image quality compared to its conventional version, but its effect on autosegmentation is unknown. This study evaluates the impact of this high-performance CBCT on autosegmentation performance, inter-observer variability, contour correction times and delineation confidence, compared to the conventional CBCT.
Materials And Methods: Twenty prostate cancer patients were enrolled in this prospective clinical study.
Article Synopsis
- The HyperSight high-performance CBCT imaging system provides better Hounsfield unit accuracy and image quality for treatment planning in cancer patients.
- A study compared dose calculation accuracy between HyperSight CBCT and traditional planning CT in prostate and lung cancer cases, evaluating various dose distribution parameters.
- Results showed HyperSight CBCT yielded accurate dose calculations for prostate patients, but breathing motion significantly affected accuracy for lung cancer patients.*
Article Synopsis
- Researchers used advanced momentum microscopy to investigate the electronic properties of the topological Dirac semimetal 1T-ZrTe, specifically focusing on the behavior of its Dirac cone above the Fermi level.
- They discovered the role of different scattering processes in how electrons relax, observing important electron-hole interactions and finding that the electrons' lifetime correlates linearly with their excess energy.
- The study offers new insights into the excited state dynamics of 1T-ZrTe, contributing to the understanding of ultrafast electron behaviors in 3D topological materials.