In this study, phantoms were used to illustrate the dependence of photostimulable phosphor's characteristic response on beam quality. These phantoms, consisting of sheets of acrylic and aluminum, represented an extremity, an abdomen, a skull and a chest. Images were taken with 50 to 65 kVp, 60 to 110 kVp, 65 to 80 kVp and 70 to 120 kVp, respectively. In general, the amount of resulting luminescence of the photostimulable phosphor per unit of air kerma (exposure) increased with kVp.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Relationship between image information content and observer performance in digital intraoral radiography.
Oral Radiol
July 2023
Department of Oral and Maxillofacial Radiology, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan.
Objectives: This study conducted a receiver operating characteristic (ROC) analysis by applying improved cluster signal-to-noise (CSN) analysis to digital intraoral radiographs and develop an observer-free method of analyzing image quality related to the observer performance in the detection task.
Methods: Two aluminum step phantoms with a thickness interval of 1.0 mm were used for this study.
Expanding the synthetic toolbox to access pristine and rare-earth-doped BaFBr nanocrystals.
Dalton Trans
November 2021
Department of Chemistry, Wayne State University, Detroit, MI 48202, USA.
A new synthetic route to access pristine and rare-earth-doped BaFBr nanocrystals is described. Central to this route is an organic-inorganic hybrid precursor of formula Ba(CFBrCOO)(HO) that serves as a dual-halogen source. Thermolysis of this precursor in a mixture of high-boiling point organic solvents yields spherical BaFBr nanocrystals (≈20 nm in diameter).
View Article and Find Full Text PDFProper Management of the Clinical Exposure Index Based on Body Thickness Using Dose Optimization Tools in Digital Chest Radiography: A Phantom Study.
Int J Environ Res Public Health
May 2021
Department of Health Sciences, Faculty of Health Sciences, Kyushu University, 774 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
Article Synopsis
- The study focuses on the relationship between body thickness, entrance surface dose (ESD), exposure index (EI), and the exposure indicator (S value) in digital chest radiography, aiming to use EI for dose optimization.
- Automatic exposure control (AEC) systems help maintain a consistent exposure dose to image receptors regardless of patient thickness, enhancing image quality.
- The findings indicate that while ESD increases with thicker phantoms at constant indicators, EI remains relatively constant, suggesting that body thickness must be taken into account when using EI as a dose optimization tool.
Real-time in vivo dosimetry system based on an optical fiber-coupled microsized photostimulable phosphor for stereotactic body radiation therapy.
Med Phys
October 2020
Division of Radiation Oncology, Kobe University Graduate School of Medicine, 7-5-2 Kusunokicho, Chuouku, Kobe, Hyogo, 650-0017, Japan.
Purpose: To develop an in vivo dosimeter system for stereotactic body radiation therapy (SBRT) that can perform accurate and precise real-time measurements, using a microsized amount of a photostimulable phosphor (PSP), BaFBr:Eu .
Methods: The sensitive volume of the PSP was 1.26 × 10 cm .
Dosimetric and Contrast Noise Ratio Comparison of Three Different Digital Imaging Technologies in Mammography.
J Med Imaging Radiat Sci
March 2020
Medical Physics Department, Hospital Universitario Ramón y Cajal, Madrid, Spain.
Purpose: The purpose of the study was to compare the three most common technologies available in digital mammography based in the evaluation of average glandular dose and contrast noise ratio (CNR).
Method: The average glandular dose was estimated with a direct digital detector (aSe) with a pixel size of 0.85 μm, a photon counter with a pixel size of 50 μm and a computerized radiography (CR) system.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!