Results 31 to 40 of about 9,517,116 (346)

Impact of flexible noise control (FNC) image processing parameters on portable chest radiography

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract There is a lack of understanding in the performance of flexible noise control (FNC) processing, which is used in digital radiography on a scanner vendor and has four parameters each involving multiple options. The aim of this study was to investigate the impact of FNC on portable chest imaging. An anthropomorphic chest phantom was imaged using
Krystal M. Kirby, Liqiang Ren, Timothy R. Daly, Yasmeen K. Tandon, Brian J. Bartholmai, Beth A. Schueler, Zaiyang Long   +6 more
wiley   +1 more source

On the accuracy of techniques for determining neutron compound-nucleus formation cross sections

EPJ Web of Conferences, 2010
We consider three methods for determining neutron nonelastic cross sections: direct measurement by transmission of neutrons through a spherical shell; subtraction of the angle-integrated elastic cross section from the total cross section; and a ...
Dietrich F.S.
doaj   +1 more source

Volume staging for arteriovenous malformation SRS treatment using VMAT

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Volume staging involves dividing the target volume into smaller parts and treating each part separately. In this study, the feasibility of volume‐staged stereotactic radiosurgery (VS‐SRS) on a linear accelerator using volumetric modulated arc therapy (VMAT) and a frameless patient positioning system is investigated.
Claudia Mendez, Ermias Gete
wiley   +1 more source

Effect of different noise reduction techniques and template matching parameters on markerless tumor tracking using dual‐energy imaging

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Purpose To evaluate the impact of various noise reduction algorithms and template matching parameters on the accuracy of markerless tumor tracking (MTT) using dual‐energy (DE) imaging. Methods A Varian TrueBeam linear accelerator was used to acquire a series of alternating 60 and 120 kVp images (over a 180° arc) using fast kV switching, on ...
Mandeep Kaur, Peter Wagstaff, Hassan Mostafavi, Mathias Lehmann, Daniel Morf, Liangjia Zhu, Hyejoo Kang, Michal Walczak, Matthew M. Harkenrider, John C. Roeske   +9 more
wiley   +1 more source

Value of Image Subtraction for the Identification of Hepatocellular Carcinoma Capsule on Gadoxetic Acid-Enhanced MRI

대한영상의학회지, 2018
Purpose To evaluate value of image subtraction for identifying hepatocellular carcinoma (HCC) capsule on gadoxetic acid-enhanced MR images. Materials and Methods This study involved 108 patients at risk of HCC preoperatively examined using ...
Hyunjung Kim, Jhii-Hyun Ahn, Jin Sil Moon, Seung-Whan Cha   +3 more
doaj   +1 more source

Comparison of Accuracy of Conventional Periapical Radiography and Direct Digital Subtractions Radiography with or without Image Enhancement in the Diagnosis of Density Changes

Journal of Dental Research, Dental Clinics, Dental Prospects, 2012
Background and aims. In periapical radiographic technique, the changes will be visible only after considerable deposition or resorption while digital subtraction technique visualizes slight density changes. This study was aimed to compare visualization
Tahmineh Razi, Arezu Mohammadi, Morteza Ghojazadeh   +2 more
doaj   +1 more source

Subtraction Technique in Intravenous Aortography

Radiology, 1977
Excretory urography using the subtraction technique (100 ml of 60% urographic media injected in 10-12 seconds) demonstrated the aorta and its major branches well enough to prove useful clinically. The method is fast and graphic, and risk seems no greater than that associated with the standard urographic examination.
William J. Mikkelsen, Vidvuds Bandrevics, Gary Y. S. Yim, David R. James   +3 more
openaire   +5 more sources

High-Stringency Subtraction for the Identification of Differentially Regulated cDNA Clones

BioTechniques, 1997
The technique of high-stringency subtraction described here facilitates subtractive hybridizations between directional cDNA libraries constructed in λ ZAP® II cloning vectors and represents an improvement on earlier methods for the subtraction of entire ...
Charles P. Scutt, Philip M. Gilmartin
doaj   +1 more source

Additive role of dynamic subtraction MRI in assessment of unresolved HCC post-radiofrequency ablation

The Egyptian Journal of Radiology and Nuclear Medicine, 2021
Background Malignant Hepatocellular carcinoma (HCC) is one amongst the foremost widespread cancers within the world. Radiofrequency ablation (RFA) is that the most generally used substitute tool for hepatic carcinoma treatment.
Hany El-Assaly, Mohamed Farouk Hussein Abdallah, Wael Maher Mohamed, Mohamed Ibrahim Youssef   +3 more
doaj   +1 more source

Comparative Analysis of GMM, KNN, and ViBe Background Subtraction Algorithms Applied in Dynamic Background Scenes of Video Surveillance System [PDF]

Engineering and Technology Journal, 2022
Background subtraction is the most prominent technique applied in the domain of detecting moving objects. However, there is a wide range of different background subtraction models.
Maryam Yasir, Yossra Ali
doaj   +1 more source