scholarly journals Low-dose radiations derived from cone-beam CT induce transient DNA damage and persistent inflammatory reactions in stem cells from deciduous teeth

2019 ◽  
Vol 48 (1) ◽  
pp. 20170462 ◽  
Author(s):  
Piroska Virag ◽  
Mihaela Hedesiu ◽  
Olga Soritau ◽  
Maria Perde-Schrepler ◽  
Ioana Brie ◽  
...  
Keyword(s):  
Stem Cells ◽  
Dna Damage ◽  
Low Dose ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Deciduous Teeth ◽  
Inflammatory Reactions

scholarly journals 3D non-rigid alignment of low-dose scans allows to correct for saturation in lower extremity cone-beam CT

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Jennifer Maier ◽  
Andreas Maier ◽  
Bjoern Eskofier ◽  
Rebecca Fahrig ◽  
Jang-Hwan Choi
Keyword(s):  
Lower Extremity ◽  
Low Dose ◽  
Cone Beam Ct ◽  
Cone Beam

Ultra-low-dose cone-beam CT compared to standard dose in the assessment for acute fractures

2021 ◽  
Author(s):  
M. C. Murphy ◽  
B. Gibney ◽  
J. Walsh ◽  
G. Orpen ◽  
E. Kenny ◽  
...  
Keyword(s):  
Low Dose ◽  
Standard Dose ◽  
Cone Beam Ct ◽  
Cone Beam

Dental cone-beam CT reconstruction from limited-angle view data based on compressed-sensing (CS) theory for fast, low-dose X-ray imaging

2014 ◽  
Vol 64 (12) ◽  
pp. 1907-1911
Author(s):  
Uikyu Je ◽  
Hyosung Cho ◽  
Minsik Lee ◽  
Jieun Oh ◽  
Yeonok Park ◽  
...  
Keyword(s):  
Compressed Sensing ◽  
Low Dose ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Ct Reconstruction ◽  
X Ray ◽  
X Ray Imaging ◽  
Limited Angle

scholarly journals EP-1864: Design of an optimised bow-tie filter for low dose paediatric cone beam CT

2018 ◽  
Vol 127 ◽  
pp. S1006-S1007
Author(s):  
A. Bryce-Atkinson ◽  
G. Whitfield ◽  
M. Van Herk
Keyword(s):  
Low Dose ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Bow Tie

scholarly journals Evaluation of a low-dose protocol for cone beam computed tomography of the temporomandibular joint

2020 ◽  
Vol 49 (6) ◽  
pp. 20190495 ◽  
Author(s):  
Durer Iskanderani ◽  
Mats Nilsson ◽  
Per Alstergren ◽  
Xie-Qi Shi ◽  
Kristina Hellen-halme
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Temporomandibular Joint ◽  
Low Dose ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Sign Test ◽  
Intraobserver Agreement ◽  
Radiographic Findings ◽  
Need To Evaluate

Objective: Evaluation of cone beam CT (CBCT) examination with a low-dose scanning protocol for assessment of the temporomandibular joint (TMJ). Methods: 34 adult patients referred for CBCT imaging of the TMJ underwent two examinations with two scanning protocols, a manufacturer-recommended protocol (default) and a low-dose protocol where the tube current was reduced to 20% of the default protocol. Three image stacks were reconstructed: default protocol, low-dose protocol, and processed (using a noise reduction algorithm) low-dose protocol. Four radiologists evaluated the images. The Sign test was used to evaluate visibility of TMJ anatomic structures and image quality. Receiver operating characteristic analyzes were performed to assess the diagnostic accuracy. κ values were used to evaluate intraobserver agreement. Results: With the low-dose and processed protocols, visibility of the TMJ anatomical structures and overall image quality were comparable to the default protocol. No significant differences in radiographic findings were found for the two low-dose protocols compared to the default protocol. The area under the curves (Az) averaged for the low-dose and processed protocols, according to all observers, were 0.931 and 0.941, respectively. Intraobserver agreement was good to very good. Conclusion: For the CBCT unit used in this study, the low-dose CBCT protocol for TMJ examination was diagnostically comparable to the manufacturer-recommended protocol, but delivered a five times lower radiation dose. There is an urgent need to evaluate protocols for CBCT examinations of TMJ in order to optimize them for a radiation dose as low as diagnostically acceptable (the as low as diagnostically acceptable principle recommended by NCRP).

scholarly journals Patient-based low dose cone beam CT acquisition settings for prostate image-guided radiotherapy treatments on a Varian TrueBeam linear accelerator

2020 ◽  
Vol 93 (1115) ◽  
pp. 20200412
Author(s):  
Maria Antonietta Piliero ◽  
Margherita Casiraghi ◽  
Davide Giovanni Bosetti ◽  
Simona Cima ◽  
Letizia Deantonio ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Image Quality ◽  
Low Dose ◽  
Cone Beam Ct ◽  
Subjective Evaluation ◽  
Cone Beam ◽  
Low Contrast ◽  
Image Guided Radiotherapy ◽  
Image Guided ◽  
Prostate Cancer Radiotherapy

Objective: To evaluate the performance of low dose cone beam CT (CBCT) acquisition protocols for image-guided radiotherapy of prostate cancer. Methods: CBCT images of patients undergoing prostate cancer radiotherapy were acquired with the settings currently used in our department and two low dose settings at 50% and 63% lower exposure. Four experienced radiation oncologists and two radiation therapy technologists graded the images on five image quality characteristics. The scores were analysed through Visual Grading Regression, using the acquisition settings and the patient size as covariates. Results: The low dose acquisition settings have no impact on the image quality for patients with body profile length at hip level below 100 cm. Conclusions: A reduction of about 60% of the dose is feasible for patients with size below 100 cm. The visibility of low contrast features can be compromised if using the low dose acquisition settings for patients with hip size above 100 cm. Advances in knowledge: Low dose CBCT acquisition protocols for the pelvis, based on subjective evaluation of patient images.

Low-dose and scatter-free cone-beam CT imaging: a preliminary study

2012 ◽  
Author(s):  
Xue Dong ◽  
Xun Jia ◽  
Tianye Niu ◽  
Lei Zhu
Keyword(s):  
Low Dose ◽  
Cone Beam Ct ◽  
Ct Imaging ◽  
Cone Beam ◽  
Preliminary Study

SU-E-J-07: A Preliminary Study on Optimal Dose-Allocation Parameters for Low-Dose Cone-Beam CT

2011 ◽  
Vol 38 (6Part7) ◽  
pp. 3443-3443
Author(s):  
Z Zhang ◽  
X Han ◽  
E Pearson ◽  
J Bian ◽  
E Sidky ◽  
...  
Keyword(s):  
Low Dose ◽  
Cone Beam Ct ◽  
Optimal Dose ◽  
Cone Beam ◽  
Preliminary Study

WE-E-201B-03: Compressed Sensing with a First-Order Method for Low-Dose Cone-Beam CT Reconstruction

2010 ◽  
Vol 37 (6Part7) ◽  
pp. 3442-3442
Author(s):  
K Choi ◽  
J Wang ◽  
L Zhu ◽  
T Suh ◽  
S Boyd ◽  
...  
Keyword(s):  
Compressed Sensing ◽  
Low Dose ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Order Method ◽  
Ct Reconstruction ◽  
First Order ◽  
First Order Method

scholarly journals Noise reduction in material decomposition for low-dose dual-energy cone-beam CT

2013 ◽  
Author(s):  
W. Zbijewski ◽  
G. Gang ◽  
A. S. Wang ◽  
J. W. Stayman ◽  
K. Taguchi ◽  
...  
Keyword(s):  
Noise Reduction ◽  
Low Dose ◽  
Cone Beam Ct ◽  
Dual Energy ◽  
Cone Beam ◽  
Material Decomposition ◽  
Energy Cone
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