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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4418968 | PMC |
| http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0128052 | PLOS |
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Improving timing resolution of BGO for TOF-PET: a comparative analysis with and without deep learning.
EJNMMI Phys
January 2025
Sherbrooke Molecular Imaging Center and Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, 12th Avenue N, Sherbrooke, J1H 5N4, Québec, Canada.
Background: The renewed interest in BGO scintillators for TOF-PET is driven by the improved Cherenkov photon detection with new blue-sensitive SiPMs. However, the slower scintillation light from BGO causes significant time walk with leading edge discrimination (LED), which degrades the coincidence time resolution (CTR). To address this, a time walk correction (TWC) can be done by using the rise time measured with a second threshold.
View Article and Find Full Text PDFOptimizing time in harness : factors associated with sonographic resolution of developmental dysplasia of the hip during Pavlik treatment.
Bone Joint J
January 2025
Division of Orthopedic Surgery and Sports Medicine, Texas Children's Hospital, Houston, Texas, USA.
Aims: The primary aims of this study were to determine the time to sonographic correction of decentred hips during treatment with Pavlik harness for developmental dysplasia of the hip (DDH) and investigate potential risk factors for a delayed response to treatment.
Methods: This was a retrospective cohort study of infants with decentred hips who underwent a comprehensive management protocol with Pavlik harness between 2012 and 2016. Ultrasound assessments were performed at standardized intervals and time to correction from centring of the femoral head was quantified.
A Novel Membrane-Associated Protein Aids Bacterial Colonization of Maize.
ACS Synth Biol
January 2025
Department of Chemical and Biological Engineering, University of Wisconsin - Madison, Madison, Wisconsin 53706, United States.
The soil environment affected by plant roots and their exudates, termed the rhizosphere, significantly impacts crop health and is an attractive target for engineering desirable agricultural traits. Engineering microbes in the rhizosphere is one approach to improving crop yields that directly minimizes the number of genetic modifications made to plants. Soil microbes have the potential to assist with nutrient acquisition, heat tolerance, and drought response if they can persist in the rhizosphere in the correct numbers.
View Article and Find Full Text PDFPhotoredox Activation of Donor-Acceptor Cyclopropanes: Distonic Radical Cation Reactivity in [3+2] Cycloaddition Reactions.
Angew Chem Int Ed Engl
December 2024
Department of Chemistry and Chemical Biology, Indian Institute of Technology (ISM) Dhanbad, Jharkhand, 826004, India.
Article Synopsis
- Altering the reactivity of molecules could resolve current limitations, especially for Donor-Acceptor Cyclopropanes (DACs) which have relied on Lewis acids for activation.
- Unpolarized alkenes present challenges due to a polarity mismatch with the Lewis acid-mediated zwitterionic intermediate, hindering their coupling.
- Using photoredox catalysis to leverage the distonic radical cation approach successfully navigates this mismatch, allowing for the formation of highly substituted cyclopentanes and facilitating new pathways to create bicyclo[3.1.1]heptanes through a unique [3σ+2σ] cycloaddition process.
Volumetric MRI correlates of persistent auditory verbal hallucinations and olfactory identification impairment in chronic schizophrenia: A cross-sectional study.
Prog Neuropsychopharmacol Biol Psychiatry
November 2024
Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China; Shandong Provincial Hospital, Shandong University, Jinan, Shandong, China; Department of Psychiatry, National Clinical Research Center for Mental Disorders, and National Center for Mental Disorders, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China. Electronic address:
Article Synopsis
- Olfactory impairments are prevalent in schizophrenia patients, especially those with persistent auditory verbal hallucinations (pAVHs), but their relationship with brain gray matter volume (GMV) abnormalities is not fully understood.
- A study involving 75 SCZ patients with pAVHs, 56 without, and 83 healthy controls used voxel-based morphometry to analyze GMV differences and the Odor Stick Identification Test to assess olfactory abilities.
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