A jaw calibration method to provide a homogeneous dose distribution in the matching region when using a monoisocentric beam split technique

2011 ◽  
Vol 38 (5) ◽  
pp. 2374-2381 ◽  
Author(s):  
E. Cenizo ◽  
S. García-Pareja ◽  
P. Galán ◽  
C. Bodineau ◽  
F. Caudepón ◽  
...  
Keyword(s):  
Dose Distribution ◽  
Calibration Method ◽  
Homogeneous Dose ◽  
Split Technique ◽  
Beam Split

scholarly journals Dosimetric and radiobiological comparison of treatment plan between CyberKnife and EDGE in stereotactic body radiotherapy for pancreatic cancer

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Zhi-tao Dai ◽  
Li Ma ◽  
Ting-ting Cao ◽  
Lian Zhu ◽  
Man Zhao ◽  
...  
Keyword(s):  
Pancreatic Cancer ◽  
Spinal Cord ◽  
Stereotactic Body Radiotherapy ◽  
Dose Distribution ◽  
Normal Tissue ◽  
Organs At Risk ◽  
Treatment Plan ◽  
Locally Advanced ◽  
Conformity Index ◽  
Homogeneous Dose

AbstractTo perform a comparison of the different stereotactic body radiotherapy (SBRT) plans between the Varian EDGE and CyberKnife (CK) systems for locally advanced unresectable pancreatic cancer. Fifteen patients with pancreatic cancer were selected in this study. The median planning target volume (PTV) was 28.688 cm3 (5.736–49.246 cm3). The SBRT plans for the EDGE and CK were generated in the Eclipse and Multiplan systems respectively with the same contouring and dose constrains for PTV and organs at risk (OARs). Dose distributions in PTV were evaluated in terms of coverage, conformity index (CI), new conformity index (nCI), homogeneity index (HI), and gradient index (GI). OARs, including spinal cord, bowel, stomach, duodenum and kidneys were statistically evaluated by different dose-volume metrics and equivalent uniform dose (EUD). The volume covered by the different isodose lines (ISDL) ranging from 10 to 100% for normal tissue were also analyzed. All SBRT plans for EDGE and CK met the dose constraints for PTV and OARs. For the PTV, the dosimetric metrics in EDGE plans were lower than that in CK, except that D99 and GI were slightly higher. The EDGE plans with lower CI, nCI and HI were superior to generate more conformal and homogeneous dose distribution for PTV. For the normal tissue, the CK plans were better at OARs sparing. The radiobiological indices EUD of spinal cord, duodenum, stomach, and kidneys were lower for CK plans, except that liver were higher. The volumes of normal tissue covered by medium ISDLs (with range of 20–70%) were lower for CK plans while that covered by high and low ISDLs were lower for EDGE plans. This study indicated that both EDGE and CK generated equivalent plan quality, and both systems can be considered as beneficial techniques for SBRT of pancreatic cancer. EDGE plans offered more conformal and homogeneous dose distribution for PTV, while the CK plans could minimize the exposure of OARs.

EP-1625 A PRACTICAL SOLUTION TO ACHIEVE A HOMOGENEOUS DOSE DISTRIBUTION WITHOUT USING WEDGES

2012 ◽  
Vol 103 ◽  
pp. S621
Author(s):  
A. Tijhuis ◽  
T.M. Janssen ◽  
A. Olszewska ◽  
C. van Vliet-Vroegindeweij
Keyword(s):  
Dose Distribution ◽  
Practical Solution ◽  
Homogeneous Dose

Helical Tomotherapy for Radiotherapy in Esophageal Cancer: A Preferred Plan With Better Conformal Target Coverage and More Homogeneous Dose Distribution

2007 ◽  
Vol 32 (3) ◽  
pp. 166-171 ◽  
Author(s):  
Yi-Jen Chen ◽  
An Liu ◽  
Chunhui Han ◽  
Peter T. Tsai ◽  
Timothy E. Schultheiss ◽  
...  
Keyword(s):  
Esophageal Cancer ◽  
Dose Distribution ◽  
Helical Tomotherapy ◽  
Target Coverage ◽  
Homogeneous Dose

scholarly journals EP-1631: A method to achieve homogeneous dose distribution in the IMRT for Stage III lung cancer

2015 ◽  
Vol 115 ◽  
pp. S893-S894
Author(s):  
J.Y. Lu ◽  
B.T. Huang ◽  
L.L. Wu ◽  
L.M. Cheung
Keyword(s):  
Lung Cancer ◽  
Dose Distribution ◽  
Stage Iii ◽  
Homogeneous Dose

Benefits to be expected from informatics in Radiotherapy

1994 ◽  
Vol 61 (1) ◽  
pp. 63-68
Author(s):  
M. Balli ◽  
V. D. Ferrari ◽  
F. Lonardi ◽  
G. Pavanato ◽  
A. De Lucchi ◽  
...  
Keyword(s):  
Quality Assurance ◽  
Dose Distribution ◽  
State Of The Art ◽  
Dose Calculation ◽  
Target Volume ◽  
Radiotherapy Planning ◽  
Highly Qualified ◽  
3 Dimensional ◽  
Homogeneous Dose

The role of informatics in radiotherapy planning concerns dose calculation, dose distribution and quality assurance. Software research has recently developed to obtain 3-dimensional planning of treated volume and to reach more homogeneous dose distribution within radiation target volume. To increase therapeutic effectiveness, lower local relapses and reduce treatment sequelae, several quality assurance systems are being used, such as portal image analysis which allows an immediate comparison with the simulation film. Such procedures are carried out through informatics and need state-of-the-art computed systems, dedicated radiological devices and highly qualified teams as well.

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