scholarly journals Automatic exposure control at MDCT based on the contrast-to-noise ratio: Theoretical background and phantom study

2013 ◽  
Vol 29 (1) ◽  
pp. 39-47 ◽  
Author(s):  
Yoshinori Funama ◽  
Yoshiaki Sugaya ◽  
Osamu Miyazaki ◽  
Daisuke Utsunomiya ◽  
Yasuyuki Yamashita ◽  
...  
Keyword(s):  
Theoretical Background ◽  
Phantom Study ◽  
Exposure Control ◽  
Automatic Exposure Control ◽  
Noise Ratio

Optimizing image quality using automatic exposure control based on the signal-difference-to-noise ratio: a phantom study

2019 ◽  
Vol 42 (3) ◽  
pp. 803-810
Author(s):  
Hiroki Kawashima ◽  
Katsuhiro Ichikawa ◽  
Shinsuke Hanaoka ◽  
Kosuke Matsubara
Keyword(s):  
Image Quality ◽  
Phantom Study ◽  
Exposure Control ◽  
Automatic Exposure Control ◽  
Noise Ratio

Should the automatic exposure control system of CT be disabled when scanning patients with endoaortic stents or mechanical heart valves? A phantom study

2016 ◽  
Vol 27 (7) ◽  
pp. 2989-2994 ◽  
Author(s):  
Giovanni Di Leo ◽  
Chiara Spadavecchia ◽  
Moreno Zanardo ◽  
Francesco Secchi ◽  
Ivan Veronese ◽  
...  
Keyword(s):  
Control System ◽  
Heart Valves ◽  
Phantom Study ◽  
Mechanical Heart Valves ◽  
Exposure Control ◽  
Automatic Exposure Control

Low-dose CT screening for lung cancer with automatic exposure control: phantom study

2008 ◽  
Vol 1 (2) ◽  
pp. 244-250 ◽  
Author(s):  
Shiho Gomi ◽  
Yoshihisa Muramatsu ◽  
Shinsuke Tsukagoshi ◽  
Masahiro Suzuki ◽  
Ryutaro Kakinuma ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Low Dose ◽  
Phantom Study ◽  
Exposure Control ◽  
Automatic Exposure Control ◽  
Ct Screening ◽  
Low Dose Ct

scholarly journals Study of CT Automatic Exposure Control System (CT-AEC) Optimization in CT Angiography of Lower Extremity Artery by Considering Contrast-to-Noise Ratio

2016 ◽  
Vol 72 (1) ◽  
pp. 21-30 ◽  
Author(s):  
Satoshi Inada ◽  
Takanori Masuda ◽  
Naoya Maruyama ◽  
Yukari Yamashita ◽  
Tomoyasu Sato ◽  
...  
Keyword(s):  
Control System ◽  
Lower Extremity ◽  
Ct Angiography ◽  
Exposure Control ◽  
Automatic Exposure Control ◽  
Noise Ratio

Automatic Exposure Control in Digital Mammography: Contrast-to-Noise Ratio Versus Average Glandular Dose

2008 ◽  
pp. 711-715
Author(s):  
Gisella Gennaro ◽  
Paola Golinelli ◽  
Elena Bellan ◽  
Paola Colombo ◽  
Loredana D’Ercole ◽  
...  
Keyword(s):  
Digital Mammography ◽  
Exposure Control ◽  
Automatic Exposure Control ◽  
Average Glandular Dose ◽  
Noise Ratio ◽  
Ratio Versus

scholarly journals TO USE OR NOT USE PATIENT SHIELDING ON PREGNANT WOMEN UNDERGOING CT PULMONARY ANGIOGRAPHY: A PHANTOM STUDY

2020 ◽  
Vol 189 (4) ◽  
pp. 458-465
Author(s):  
Dino Begano ◽  
Marcus Söderberg ◽  
Anetta Bolejko
Keyword(s):  
Radiation Dose ◽  
Absorbed Dose ◽  
Pregnant Patient ◽  
Pulmonary Angiography ◽  
Phantom Study ◽  
Ionising Radiation ◽  
Exposure Control ◽  
Automatic Exposure Control ◽  
Effective Doses ◽  
The Mean

Abstract Pregnancy increases the risk of pulmonary embolism. Computed tomography pulmonary angiography (CTPA) is used for diagnosis. CT generates ionising radiation, and thus, abdominal shielding may be used. This phantom study investigated the effects of patient shielding and scan length reduction on the fetal and maternal ionising radiation dose from CTPA. The absorbed dose to the fetus was measured using thermoluminescent dosemeters. Estimated effective doses to the pregnant patient were based on the dose-length products. Shielding increased both the effective dose to the patient by 47% and the mean absorbed dose to the fetus (0.10 vs. 0.12 mGy; p < 0.001) compared with unshielded standard CTPA, as it affected the automatic exposure control. Shielded short CTPA marginally lowered only the mean fetal absorbed dose (0.03 vs. 0.02 mGy; p = 0.018). Shortening the scan reduced the fetal absorbed dose most effectively by 70% (0.10 vs. 0.03 mGy; p = 0.006), compared with the standard unshielded scan. Shielding modestly reduces fetal radiation dose but may compromise automatic exposure control, possibly increasing the maternal and fetal radiation dose. Shortening the scan is beneficial, assuming anatomical coverage is secured.

3D automatic exposure control for 64-detector row CT: Radiation dose reduction in chest phantom study

2011 ◽  
Vol 77 (3) ◽  
pp. 522-527 ◽  
Author(s):  
Keiko Matsumoto ◽  
Yoshiharu Ohno ◽  
Hisanobu Koyama ◽  
Atsushi Kono ◽  
Hiroyasu Inokawa ◽  
...  
Keyword(s):  
Radiation Dose ◽  
Dose Reduction ◽  
Radiation Dose Reduction ◽  
Phantom Study ◽  
Exposure Control ◽  
Automatic Exposure Control ◽  
Ct Radiation

Automatic exposure control in pediatric and adult multidetector CT examinations: A phantom study on dose reduction and image quality

2008 ◽  
Vol 35 (10) ◽  
pp. 4567-4576 ◽  
Author(s):  
Antonios E. Papadakis ◽  
Kostas Perisinakis ◽  
John Damilakis
Keyword(s):  
Image Quality ◽  
Dose Reduction ◽  
Multidetector Ct ◽  
Phantom Study ◽  
Exposure Control ◽  
Automatic Exposure Control
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