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Low-Dose Whole-Chest Dynamic CT for the Assessment of Large Airway Collapsibility in Patients with Suspected Tracheobronchial Instability.
Radiol Cardiothorac Imaging
October 2024
From the Department of Diagnostic and Interventional Radiology, Translational Lung Research Center (TLRC), Subdivision of Pulmonary Imaging, University Hospital of Heidelberg, Im Neuenheimer Feld 420, 69120 Heidelberg, Germany (A.B., O.W., R.R., H.U.K., C.P.H., M.O.W.); Translational Lung Research Center Heidelberg (TLRC), German Center for Lung Research (DZL), Heidelberg, Germany (A.B., O.W., R.R., H.U.K., F.T., C.P.H., F.J.F.H., M.O.W.); Department of Diagnostic and Interventional Radiology with Nuclear Medicine (A.B., O.W., R.R., H.U.K., C.P.H., M.O.W.) and Department of Pulmonary Medicine (F.T., F.J.F.H.), Thoraxklinik at the University Hospital of Heidelberg, Heidelberg, Germany; Department of Radiology, Division of Pediatric Radiology, Medical University of Graz, Graz, Austria (A.D.); Department of Internal Medicine II, Division of Pulmonology, Medical University of Vienna, Vienna, Austria (D.G.); Department of Pneumology and Critical Care Medicine, Asklepios Klinik Barmbek, Hamburg, Germany (R.E.); and Institute of Medical Informatics, University of Lübeck, Lübeck, Germany (M.H., F.F.).
Article Synopsis
- - The study aimed to evaluate tracheal collapsibility using low-dose 4D CT, comparing the results with traditional methods like inspiratory-expiratory CT and bronchoscopy in patients suspected of tracheal collapse.
- - Researchers analyzed 4D CT scans from 52 patients, finding that 48% exhibited significant tracheal collapsibility (50% or greater) and noted differences between visual 4D CT assessments and other diagnostic methods regarding detection rates of collapsibility.
- - Results showed that 4D CT was superior in identifying patients with severe collapsibility compared to both paired CT and bronchoscopy, with significant differences in collapsibility measurements between the groups assessed.
Fundamental research for dose control during supine dental panoramic radiography.
J Oral Biosci
December 2023
Division of Forensic Odontology, Department of Diagnostic and Therapeutic Sciences, Meikai University School of Dentistry, Saitama, Japan; Forensic Odontology Center, Meikai University School of Dentistry, Saitama, Japan.
Article Synopsis
- The study focused on managing radiation doses from a portable dental panoramic radiography system by measuring scattered radiation levels.
- Using the LPX7007 system and various phantoms, the research assessed radiation exposure at different angles and heights.
- Results indicated higher radiation doses at 120° and 240° angles, suggesting safety can be improved by maintaining distance and avoiding certain positions relative to the machine.
Standards of practice in forensic age estimation with CT of the medial clavicular epiphysis-a systematic review.
Int J Legal Med
November 2023
Institute of Diagnostic, Interventional and Pediatric Radiology, InselspitaI, Bern University Hospital, University of Bern, Freiburgstrasse, CH-3010, Bern, Switzerland.
The AGFAD (Arbeitsgemeinschaft für Forensische Alterdiagnostik, Study Group on Forensic Age Diagnostics) has published several recommendations regarding both technical aspects of computed tomography (CT) of the medial clavicular epiphysis (MCE) and the process of reading and interpreting the CT images for forensic age estimations (FAE). There are, however, no published recommendations regarding CT scan protocols and no dose reference values for CT of the MCE. The objective of this analysis was to assess adherence to AGFAD recommendations among practitioners of FAE and analyse reported dose-relevant CT scan parameters with the objective of helping to establish evidence-based dose reference values for FAE.
View Article and Find Full Text PDF[The application value of deep learning image reconstruction on improving image quality and evaluating the Qanadli embolism index of dual low-dose CT pulmonary angiography].
Zhonghua Yi Xue Za Zhi
May 2023
Department of Radiology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China.
To compare the image quality and Qanadli embolism index between deep learning image reconstruction (DLR) and adaptive statistical iterative reconstruction-veo (ASiR-V) in dual low-dose CT pulmonary angiography (CTPA) with low contrast agent dose and low radiation dose. Eighty-eight patients who underwent dual low-dose CTPA in the radiology department of the affiliated hospital of Xuzhou Medical University from October 2020 to March 2021 were retrospectively analyzed, including 44 males and 44 females, aged from 11 to 87 years (61±15 years). The CTPA examination were performed using 80 kV tube voltage and 20 ml contrast agent.
View Article and Find Full Text PDFLow-density 3D-printed boluses with honeycomb infill in radiotherapy.
Phys Med
June 2023
Biomedical Physics Division, Faculty of Physics, University of Warsaw, 5 L. Pasteur Street, 02-093 Warsaw, Poland. Electronic address:
Article Synopsis
- The study investigates the dosimetric properties of 3D-printed plates made from different materials (TPU and PLA) and varying infill percentages (5%-20%) to understand their impact on radiation dose delivery.
- Testing involved measuring Hounsfield unit distributions and Percentage Depth Dose (PDD) at various depths using specific equipment, and comparing measurements with calculations from treatment planning systems.
- Results indicated that higher infill percentages improved dose distribution in the build-up region, with minimal difference in performance between the materials, ultimately concluding that 3D-printed boluses enhance dose delivery effectively.
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