Assessment of the image quality of virtual monochromatic spectral computed tomography images: a phantom study considering object contrast, radiation dose, and frequency characteristics

2021 ◽  
Author(s):  
Shota Masuda ◽  
Koichi Sugisawa ◽  
Kazuya Minamishima ◽  
Akihisa Yamazaki ◽  
Masahiro Jinzaki
Keyword(s):  
Computed Tomography ◽  
Image Quality ◽  
Radiation Dose ◽  
Frequency Characteristics ◽  
Phantom Study ◽  
Computed Tomography Images ◽  
Spectral Computed Tomography

scholarly journals Utilization of sinogram affirmed iterative reconstruction on 128 multi slice computed tomography scan to reduce radiation dose and improve image quality on thorax multi slice computed tomography scan: chest phantom study

2019 ◽  
Vol 6 (10) ◽  
pp. 4533
Author(s):  
Halinda Fatmayanti ◽  
Kusworo Adi ◽  
Yeti Kartikasari
Keyword(s):  
Computed Tomography ◽  
Experimental Study ◽  
Image Quality ◽  
Radiation Dose ◽  
Dose Assessment ◽  
Computed Tomography Scan ◽  
Tube Voltage ◽  
The Impact ◽  
Tomography Scan

Background: Thorax MSCT examination is a diagnostic imaging that is capable of displaying both normal and pathological lung and respiratory organs. MSCT examination also has a better level of sensitivity and specificity compared to other modalities, but the radiation exposure given is very high, so the radiation dose given to patients is high. The reduction in radiation dose is very important because of the direct exposure to sensitive tissue. One method of reducing radiation dose is by reducing the tube voltage. However, the decrease in tube voltage causes a decrease in image quality as indicated by increased noise and decreased CNR. To maintain the quality of the image at low tube voltage setting, an IR reconstruction of SAFIRE was used. The purpose of this research is to know the impact of using SAFIRE on dose radiation and image quality of thorax MSCT.Methods: This study was an experimental study with a quasi-experimental study design. The object used was the N-1 Lungman chest phantom in which an artificial tumor was attached. Radiation dose assessment used CTDI value, while image quality assessment used noise and CNR. Data processing was conducted using linear regression test.Results: There was an effect of tube voltage setting and SAFIRE setting on radiation dose and image quality.Conclusions: Tube voltage ssetting and SAFIRE setting had an effect on radiation dose and image quality. Tube voltage setting and SAFIRE strength level setting that were able to provide optimal radiation dose and image quality were tube voltage of 80 kVp and SAFIRE strength levels 3 and 4 (S3 and S4). 

Radiation Dose and Image Quality of Prospective Triggering With Dual-Source Cardiac Computed Tomography

2009 ◽  
Vol 103 (8) ◽  
pp. 1168-1173 ◽  
Author(s):  
Ron Blankstein ◽  
Amar Shah ◽  
Rodrigo Pale ◽  
Suhny Abbara ◽  
Hiram Bezerra ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Image Quality ◽  
Radiation Dose ◽  
Cardiac Computed Tomography ◽  
Dual Source ◽  
Prospective Triggering

Radiation dose and image quality of computed tomography of the supra-aortic arteries: A comparison between single-source and dual-source CT Scanners

2018 ◽  
Vol 45 (2) ◽  
pp. 136-141 ◽  
Author(s):  
Luca Saba ◽  
Michele di Martino ◽  
Paolo Siotto ◽  
Michele Anzidei ◽  
Giovanni Maria Argiolas ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Image Quality ◽  
Radiation Dose ◽  
Dual Source Ct ◽  
Single Source ◽  
Dual Source ◽  
Ct Scanners
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