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This chapter encapsulates a short introduction to positron emission tomography (PET) imaging and the information gained by using this technology to detect changes of the dopamine 3 receptor (D3R) at the molecular level in vivo. We will discuss available D3R radiotracers, emphasizing [11C]PHNO. The focus, however, will be on PET findings in conditions including substance abuse, obesity, traumatic brain injury, schizophrenia, Parkinson's disease, and aging. Finally, there is a discussion about progress in producing next-generation selective D3R radiotracers.
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http://dx.doi.org/10.1007/7854_2022_374 | DOI Listing |
Am J Case Rep
September 2025
Department of Otolaryngology - Head and Neck Surgery, King Fahad Specialist Hospital, Dammam, Saudi Arabia.
BACKGROUND Pediatric sinonasal tumors are rare, accounting for about 4% of all pediatric head and neck neoplasms. Due to their nonspecific symptoms such as nasal obstruction, epistaxis, and facial pain, these tumors often present diagnostic challenges and lead to delays in managment. Early and accurate diagnosis is crucial to optimize clinical outcomes.
View Article and Find Full Text PDFMol Psychiatry
September 2025
Department of Psychological Medicine, Institute of Psychiatry, Psychology & Neuroscience, King's College London, 16 De Crespigny Park, London, SE5 8AB, UK.
Disrupted gamma-aminobutyric acid (GABA) neurotransmission may contribute to the pathophysiology of schizophrenia. Reductions in hippocampal GABAergic neurons have been found in schizophrenia, and increased hippocampal perfusion has been described in schizophrenia and in people at clinical high-risk for psychosis (CHRp). We have also found decreases in hippocampal GABA receptors containing the α5 subunit (GABARα5) in a well-validated neurodevelopmental rat model of relevance for schizophrenia.
View Article and Find Full Text PDFJ Nucl Cardiol
August 2025
Department of Medicine, University of Tennessee Graduate School of Medicine, Knoxville, TN, USA.
Systemic amyloidosis is a complex disorder, making early and accurate diagnosis challenging. The most common types are associated with misfolded transthyretin or immunoglobulin light chains, where cardiac and renal amyloidosis portend the worst prognosis. Peptide p5+14 can bind all types of amyloid via multivalent electrostatic interactions.
View Article and Find Full Text PDFJ Vasc Interv Radiol
September 2025
Interventional Radiology, University Hospital of Patras,Rio , Greece ,26504.
This study investigated the effects of Yttrium-90 (Y90) radioembolization in 8 rabbits, focusing on delivery accuracy, dosimetry, and pathological outcomes. Y90 was successfully delivered angiographically targeted via the pulmonary lower basal segmental arteries to all rabbits, with confirmation via PET/CT imaging and a lung target median of the mean dose 132.1Gy (range, 11.
View Article and Find Full Text PDFRev Esp Med Nucl Imagen Mol (Engl Ed)
September 2025
Servicio de Medicina Nuclear, Clínica Universidad de Navarra, Madrid, Spain; Grupo de Trabajo de Oncología de la SEMNIM, Spain.
Breast cancer is one of the most prevalent neoplasms worldwide, with molecular subtypes that influence prognosis and therapeutic strategies. PET/CT with different radiopharmaceuticals has revolutionized diagnosis, staging, and treatment monitoring. [F]-Fluorodeoxyglucose remains the most widely used radiotracer, but it has limitations in certain subtypes, such as invasive lobular carcinoma, where 16α-[F] fluoro-17β-estradiol and [Ga]-FAPI (fibroblast activation protein inhibitors) have demonstrated greater utility.
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