Review
Engineering, Biomedical
Marco Brambilla, Andrea D'Alessio, Agnieszka Kuchcinska, Doris Segota, Lucie Sukupova
Summary: The aim of this systematic review is to critically appraise the evidence in the published literature regarding the conversion factors between kerma-area product (P(KA)) and effective/organ dose (DCED_PKA, DCHT_PKA) for cardiac interventional fluoroscopy procedures performed in adults and paediatric patients and propose reference conversion factors for standardizing dose calculations.
PHYSICS IN MEDICINE AND BIOLOGY
(2022)
Article
Engineering, Multidisciplinary
Ivan Lenicek, Luka Ferkovic
Summary: This paper presents the establishment of a magnetic flux density standard in the national calibration laboratory in Croatia. The process includes constructing a magnetic field source, determining the error margin, parameterizing the electrical model, and verifying the correction experimentally. The laboratory now has the capability to calibrate environmental magnetometers with a relative uncertainty of 0.8%.
Article
Engineering, Multidisciplinary
Yang Jiao, Qing Chen, Zhiwei Bao, Linqiang Pan, Hongbin Li
Summary: This study introduces an online anomaly identifying method based on calibration devices' parallel working mode to check metering performance in real time, avoiding the shortcomings of traditional manual inspections at regular intervals.
Article
Oncology
Damijan Skrk, Katja Petek, Dean Pekarovic, Nejc Mekis
Summary: The study aimed to establish typical radiation quantity values for common trauma orthopaedic surgical procedures and assess the impact of image intensifier and flat panel detector technology on patient exposure. Data from 199 cases over a 6-month period were analyzed, showing the potential for further radiation exposure optimization in orthopaedic traumatology.
RADIOLOGY AND ONCOLOGY
(2021)
Article
Instruments & Instrumentation
Junya Ishii, Daisuke Satoh, Takeshi Fujiwara, Masahito Tanaka, Masahiro Kato, Tadahiro Kurosawa
Summary: A mechanical source is desired to replace high-activity gamma-ray sources in order to enhance nuclear security and safety management. NMIJ developed a new photon reference field using an electron beam, which has comparable energy to Cs-137 gamma-ray. The validation of the reference field's air kerma rate was achieved by comparing it to a commercial cavity ionization chamber.
Article
Radiology, Nuclear Medicine & Medical Imaging
Nao Ichikawa, Atsushi Fukuda, Takuma Hayashi, Kosuke Matsubara
Summary: This study evaluated the effect of equalization filters (EFs) on kerma-area product (KAPQKM) and incident air-kerma (Ka,i,QKM) using a KAP meter. The results showed that there was a potential underestimation of Ka,i,QKM values by EFs, with kQ,Q0KM values increasing with tube potential and spectral filter. Additionally, Ka,i,QKM was found to be up to approximately two times lower than Ka,i,Qext values by EFs.
JOURNAL OF APPLIED CLINICAL MEDICAL PHYSICS
(2021)
Article
Thermodynamics
Jan Koci, Robert Cerny
Summary: Monitoring heat fluxes in residential buildings requires specific conditions. When investigating low conducting materials or well-insulated walls, the sensitivity of heat flux sensors needs to be enhanced. This paper introduces a semi-virtual calibration experiment design that can reflect local experimental conditions without additional costs, improving the sensitivity of the sensors.
Article
Environmental Sciences
Liming Zhou, Xiaoling Zhang, Xu Zhan, Liming Pu, Tianwen Zhang, Jun Shi, Shunjun Wei
Summary: This paper proposes a novel sub-image local area minimum entropy reconstruction method for multichannel high-resolution and wide-swath SAR systems, effectively addressing azimuth ambiguity and various errors with good adaptability. Experimental results validate the effectiveness of the method, showing advantages in low signal-to-noise ratio conditions and curved trajectory SAR reconstruction.
Article
Biochemistry & Molecular Biology
A. W. Schmalwieser, S. Eschenbacher, J. Schreder
Summary: This paper explores the use of erythemal weighted broadband meters for other photobiological endpoints. Nine different types of broadband meters were considered and the calibration factors for all effects were calculated under different solar elevation and total ozone conditions. The paper also proposes a method to convert erythemally effective irradiance to other effective irradiances.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
(2022)
Article
Engineering, Multidisciplinary
Yunsheng Jiang, Zhiqian Xu, Ping Wu, Liuhong Huang, Cui Meng
Summary: A time-domain calibration method for transient field sensors is proposed in this article, using TEM cells and monocone TEM cells as the calibration devices, divided into amplitude sensitivity and rising edge calibration. By introducing the process and presenting an example of calibrating a D-Dot sensor, the method is proven to be efficient and practical.
Article
Chemistry, Multidisciplinary
Libing Zhu, Manzhou Zhang, Xincheng Xiang, Xiangang Wang
Summary: This paper proposes a machine log file based reconstruction method to calculate the field uniformity for proton field analysis. The study compares and analyzes the differences in DAP determined using different devices. The consistency of the two methods used to determine DAP and calibrate beam monitor is verified by analyzing the delivered dose.
APPLIED SCIENCES-BASEL
(2022)
Article
Astronomy & Astrophysics
Jan Ebr, Sergey Karpov, Jiri Eliasek, Jiri Blazek, Ronan Cunniffe, Ivana Ebrova, Petr Janecek, Martin Jelinek, Jakub Jurysek, Dusan Mandat, Martin Masek, Miroslav Pech, Michael Prouza, Petr Travnicek
Summary: The new method presented utilizes a CCD camera with a photographic lens to measure the vertical aerosol optical depth (VAOD) with high precision and rapid measurements, suitable for astronomical sites. Results at future sites of the Cerenkov Telescope Array show good internal consistency, achieved through laboratory calibration of spectral properties and camera response.
ASTRONOMICAL JOURNAL
(2021)
Article
Engineering, Biomedical
Ibrahim I. Suliman
Summary: This study proposes a method for determining entrance surface air kerma (ESAK) using the kerma area product (P-KA) in digital radiology. The method derives ESAK values from X-ray tube outputs and patient exposure factors, and determines slope and intercept coefficients for each X-ray equipment and procedure through linear regression. Results show a significant correlation between ESAK and P-KA values, which can assist with quality assurance and patient dose management in digital radiology.
PHYSICAL AND ENGINEERING SCIENCES IN MEDICINE
(2022)
Article
Multidisciplinary Sciences
Markus Schaffer, Torben Tvedebrink, Anna Marszal-Pomianowska
Summary: This study provides three years of data from 3,021 commercial smart heat meters in Danish residential buildings, which have undergone screening, interpolation, and imputation processes, aiming to facilitate the development of data-driven approaches in the building sector.
Article
Engineering, Electrical & Electronic
Tongxu Xu, Xiang Xu, Dacheng Xu, Heming Zhao
Summary: The proposed novel calibration method for MEMS accelerometers in this paper achieves high accuracy and repeatability. By analyzing static data characteristics and utilizing an iterated parameter correction process, highly accurate calibration results can be obtained.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
