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Internal dosimetry of diagnostic nuclear medicine requires biokinetic and anatomical models to estimate the radiation exposure from a radiopharmaceutical. Biokinetic models predict the uptake, turnover, and retention of the radionuclide in organs and tissues, while anatomical models estimate energy absorption from decay using computational phantoms. To make more accurate predictions of biokinetic transfer, the International Commission on Radiological Protection (ICRP) has introduced a new compartmental framework, based on a systemic blood model, which can be used to estimate the transfer of the administered radionuclides between organs and tissues. The ICRP Task Group 36 (TG-36) is developing the biokinetic models and dosimetric calculations for radiopharmaceuticals for the ICRP. IDAC-BioDose integrates compartmental modeling and IDAC-Dose2.2. For the biokinetic predictions, transfer rates are generated through empirical data by curve fitting. IDAC-BioDose is benchmarked with SAAMII and DCAL and is used by ICRP TG-36 to revise the biokinetics and dosimetry for ICRP Publ. 128. This comprehensive software expedites absorbed dose and effective dose assessments in the field of diagnostic nuclear medicine.
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http://dx.doi.org/10.1093/rpd/ncaf044 | DOI Listing |
PLoS One
September 2025
Datong Hongtai Mine Engineering Construction Co., Ltd. of Jinneng Holding Coal Industry Group, Datong, China.
To reveal the microscopic damage evolution law of rocks under the effect of unloading disturbances with different amplitudes, electron microscope scanning, nuclear magnetic resonance (NMR), and triaxial compression tests were carried out. The evolution patterns of surface and internal pore types and mechanical properties of rock specimens after unloading perturbation were analyzed. In this paper, a classification of the ratio of dmax/dmin (dmax and dmin refer to the maximum and minimum pore size of each pore, respectively) is proposed to examine the pore and crack evolution extension development on the surface of the specimen.
View Article and Find Full Text PDFPLoS One
September 2025
Horticultural Sciences Department, University of Florida, Gainesville, Florida, United States of America.
The study of plant biology has traditionally focused on investigations conducted at the tissue, organ, or whole plant level. However, single-cell transcriptomics has recently emerged as an important tool for plant biology, enabling researchers to uncover the expression profiles of individual cell types within a tissue. The application of this tool has revealed new insights into cell-to-cell gene expression heterogeneity and has opened new avenues for research in plant biology.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
September 2025
Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34051, Republic of Korea.
Microscopic examination of biopsy tissues remains essential for cancer diagnosis, despite advancements in sequencing technologies. Alterations in nuclear size or the nuclear-to-cytoplasmic ratio are hallmark features of cancer cells and often correlate with disease progression. However, the mechanisms underlying nuclear size abnormalities and their impact on tumor progression remain unclear.
View Article and Find Full Text PDFJAMA
September 2025
Division of Surgery and Interventional Science, UCL, London, United Kingdom.
Importance: Multiparametric magnetic resonance imaging (MRI), with or without prostate biopsy, has become the standard of care for diagnosing clinically significant prostate cancer. Resource capacity limits widespread adoption. Biparametric MRI, which omits the gadolinium contrast sequence, is a shorter and cheaper alternative offering time-saving capacity gains for health systems globally.
View Article and Find Full Text PDFJAMA Cardiol
September 2025
Department of Cardiology, Inselspital University Hospital of Bern, University of Bern, Bern, Switzerland.
Importance: Right anomalous aortic origin of a coronary artery (R-AAOCA) is a rare congenital condition increasingly diagnosed with the growing use of cardiac imaging. Due to dynamic compression of the anomalous vessel, invasive fractional flow reserve (FFR) during a dobutamine-atropine volume challenge (FFR-dobutamine) is considered the reference standard. A reliable alternative method is needed to reduce extensive invasive testing, but it remains uncertain whether noninvasive imaging can accurately assess the hemodynamic relevance of R-AAOCA.
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