TH-EF-BRA-01: 5D Respiratory Motion Model Based Iterative Reconstruction Method for 4DCBCT

2016 ◽  
Vol 43 (6Part47) ◽  
pp. 3897-3897
Author(s):  
J Liu ◽  
D Low ◽  
H Gao
Keyword(s):  
Iterative Reconstruction ◽  
Respiratory Motion ◽  
Reconstruction Method ◽  
Motion Model ◽  
Model Based

WE-D-303-02: Applications of Volumetric Images Generated with a Respiratory Motion Model Based On An External Surrogate Signal

2015 ◽  
Vol 42 (6Part38) ◽  
pp. 3668-3669 ◽  
Author(s):  
M Hurwitz ◽  
C Williams ◽  
P Mishra ◽  
S Dhou ◽  
J Lewis
Keyword(s):  
Respiratory Motion ◽  
Motion Model ◽  
Model Based ◽  
Volumetric Images

SU-E-J-73: Generation of Volumetric Images with a Respiratory Motion Model Based On An External Surrogate Signal

2014 ◽  
Vol 41 (6Part7) ◽  
pp. 172-172
Author(s):  
M Hurwitz ◽  
C Williams ◽  
P Mishra ◽  
S Dhou ◽  
J Lewis
Keyword(s):  
Respiratory Motion ◽  
Motion Model ◽  
Model Based ◽  
Volumetric Images

Evaluation of an iterative model-based reconstruction of pediatric abdominal CT with regard to image quality and radiation dose

2017 ◽  
Vol 59 (6) ◽  
pp. 740-747
Author(s):  
Marie-Louise Aurumskjöld ◽  
Marcus Söderberg ◽  
Fredrik Stålhammar ◽  
Kristina Vult von Steyern ◽  
Anders Tingberg ◽  
...  
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Iterative Reconstruction ◽  
Low Dose ◽  
Pediatric Patients ◽  
Standard Dose ◽  
Reconstruction Method ◽  
Abdominal Ct ◽  
Model Based ◽  
Iterative Model

Background In pediatric patients, computed tomography (CT) is important in the medical chain of diagnosing and monitoring various diseases. Because children are more radiosensitive than adults, they require minimal radiation exposure. One way to achieve this goal is to implement new technical solutions, like iterative reconstruction. Purpose To evaluate the potential of a new, iterative, model-based method for reconstructing (IMR) pediatric abdominal CT at a low radiation dose and determine whether it maintains or improves image quality, compared to the current reconstruction method. Material and Methods Forty pediatric patients underwent abdominal CT. Twenty patients were examined with the standard dose settings and 20 patients were examined with a 32% lower radiation dose. Images from the standard examination were reconstructed with a hybrid iterative reconstruction method (iDose4), and images from the low-dose examinations were reconstructed with both iDose4 and IMR. Image quality was evaluated subjectively by three observers, according to modified EU image quality criteria, and evaluated objectively based on the noise observed in liver images. Results Visual grading characteristics analyses showed no difference in image quality between the standard dose examination reconstructed with iDose4 and the low dose examination reconstructed with IMR. IMR showed lower image noise in the liver compared to iDose4 images. Inter- and intra-observer variance was low: the intraclass coefficient was 0.66 (95% confidence interval = 0.60–0.71) for the three observers. Conclusion IMR provided image quality equivalent or superior to the standard iDose4 method for evaluating pediatric abdominal CT, even with a 32% dose reduction.

Generation of fluoroscopic 3D images with a respiratory motion model based on an external surrogate signal

2014 ◽  
Vol 60 (2) ◽  
pp. 521-535 ◽  
Author(s):  
Martina Hurwitz ◽  
Christopher L Williams ◽  
Pankaj Mishra ◽  
Joerg Rottmann ◽  
Salam Dhou ◽  
...  
Keyword(s):  
Respiratory Motion ◽  
Motion Model ◽  
3D Images ◽  
Model Based
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