Rotational positional error-corrected linear set-up margin calculation technique for lung stereotactic body radiotherapy in a dual imaging environment of 4-D cone beam CT and ExacTrac stereoscopic imaging

2021 ◽  
Author(s):  
Biplab Sarkar ◽  
Tharmarnadar Ganesh ◽  
Anusheel Munshi ◽  
Arjunan Manikandan ◽  
Soumya Roy ◽  
...  
Keyword(s):  
Stereotactic Body Radiotherapy ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Positional Error ◽  
Stereoscopic Imaging ◽  
Linear Set ◽  
Calculation Technique ◽  
Dual Imaging ◽  
Set Up

112 Set-up corrections for lung stereotactic body radiotherapy (SBRT) patients determined by online cone beam CT image guidance

Lung Cancer ◽  
2011 ◽  
Vol 71 ◽  
pp. S39
Author(s):  
C. Peedell ◽  
C. Richmond ◽  
K. Pilling ◽  
D. Shakespeare ◽  
H. Bayles ◽  
...  
Keyword(s):  
Stereotactic Body Radiotherapy ◽  
Image Guidance ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Ct Image ◽  
Set Up

scholarly journals A Method to Improve Electron Density Measurement of Cone-Beam CT Using Dual Energy Technique

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Kuo Men ◽  
Jian-Rong Dai ◽  
Ming-Hui Li ◽  
Xin-Yuan Chen ◽  
Ke Zhang ◽  
...  
Keyword(s):  
Electron Density ◽  
Cone Beam Ct ◽  
Density Measurement ◽  
Dual Energy ◽  
Cone Beam ◽  
Imaging Method ◽  
Basis Material ◽  
X Ray ◽  
Dual Energy Imaging ◽  
Set Up

Purpose. To develop a dual energy imaging method to improve the accuracy of electron density measurement with a cone-beam CT (CBCT) device.Materials and Methods. The imaging system is the XVI CBCT system on Elekta Synergy linac. Projection data were acquired with the high and low energy X-ray, respectively, to set up a basis material decomposition model. Virtual phantom simulation and phantoms experiments were carried out for quantitative evaluation of the method. Phantoms were also scanned twice with the high and low energy X-ray, respectively. The data were decomposed into projections of the two basis material coefficients according to the model set up earlier. The two sets of decomposed projections were used to reconstruct CBCT images of the basis material coefficients. Then, the images of electron densities were calculated with these CBCT images.Results. The difference between the calculated and theoretical values was within 2% and the correlation coefficient of them was about 1.0. The dual energy imaging method obtained more accurate electron density values and reduced the beam hardening artifacts obviously.Conclusion. A novel dual energy CBCT imaging method to calculate the electron densities was developed. It can acquire more accurate values and provide a platform potentially for dose calculation.

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