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Optimisation of low and ultra-low dose scanning protocols for ultra-extended field of view PET in a real-world clinical setting.
Cancer Imaging
January 2025
Melbourne Theranostic Innovation Centre, Level 8, 14-20 Blackwood St, North Melbourne, VIC, 3051, Australia.
True total-body and extended axial field-of-view (AFOV) PET/CT with 1m or more of body coverage are now commercially available and dramatically increase system sensitivity over conventional AFOV PET/CT. The Siemens Biograph Vision Quadra (Quadra), with an AFOV of 106cm, potentially allows use of significantly lower administered radiopharmaceuticals as well as reduced scan times. The aim of this study was to optimise acquisition protocols for routine clinical imaging with FDG on the Quadra the prioritisation of reduced activity given physical infrastructure constraints in our facility.
View Article and Find Full Text PDFPrevalence, incidence, and clinical features of cardiac involvement in patients with pulmonary sarcoidosis.
Respir Med
January 2025
Department of Respiratory Medicine, Faculty of Medicine, Hokkaido University, Sapporo, Japan.
Background: The epidemiology and characteristics of cardiac involvement in patients with pulmonary sarcoidosis remain unclear. We aimed to determine the prevalence, incidence, and clinical features of cardiac sarcoidosis in patients with pulmonary sarcoidosis.
Methods: The characteristics of patients with biopsy-proven pulmonary sarcoidosis were retrospectively evaluated.
Estimation of dose to a bystander from F-18 FDG patients using Monte Carlo simulation in clinical exposure scenarios.
Phys Eng Sci Med
January 2025
Department of Physics and Radiation Safety, Nepean Hospital, Penrith, New South Wales, Australia.
The radiation exposure to bystanders from nuclear medicine patients is a common concern raised in nuclear medicine departments. The GATE (Geant4 Application for Tomographic Emission) Monte Carlo radiation transport application was used to estimate the dose to a bystander. Two voxelised phantoms were utilised in a GATE Monte Carlo simulation as the radiation source and target.
View Article and Find Full Text PDFInter-network functional connectivity increases by beta-amyloid and may facilitate the early stage of tau accumulation.
Neurobiol Aging
January 2025
Department of Radiology, Brain Health Imaging Institute, Weill Cornell Medicine, New York, NY, United States.
Alzheimer's disease (AD) is pathologically marked by tau tangles and beta-amyloid (Aβ) plaques. It has been hypothesized that Aβ facilitates spread of tau outside of the medial temporal lobe (MTL), but exact mechanism of this facilitation remains unclear. We aimed to test the hypothesis that abnormal Aβ induces an increase in inter-network functional connectivity, which in turn induces early-stage tau elevation in limbic network.
View Article and Find Full Text PDFPET Reporter Probes for Brain Imaging of Transduced Gene and Cell Expression: Status and Challenges.
J Med Chem
January 2025
Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland, 20892 United States.
Article Synopsis
- Gene therapy and cell transduction are emerging as promising treatments for neurological and psychiatric disorders, with PET imaging playing a key role in assessing treatment effectiveness.
- The success of PET imaging relies on the creation of specific radiotracers that can identify exogenous transgenes or modified cells in the brain, potentially eliminating the need for invasive procedures.
- This article discusses the current state and challenges in developing PET probes for monitoring gene therapy and cellular interventions, highlighting the importance of radiochemical development and practical applications in a clinical setting.
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