Physics of Treatment Planning for Single-Field Uniform Dose *

2018 ◽  
pp. 455-482
Author(s):  
Martijn Engelsman ◽  
Lei Dong
Keyword(s):  
Treatment Planning ◽  
Single Field

scholarly journals A single-field integrated boost treatment planning technique for spot scanning proton therapy

2014 ◽  
Vol 9 (1) ◽  
Author(s):  
Xiaorong Ronald Zhu ◽  
Falk Poenisch ◽  
Heng Li ◽  
Xiaodong Zhang ◽  
Narayan Sahoo ◽  
...  
Keyword(s):  
Treatment Planning ◽  
Proton Therapy ◽  
Spot Scanning ◽  
Integrated Boost ◽  
Planning Technique ◽  
Single Field

Comparison of prostate proton treatment planning technique, interfraction robustness, and analysis of single-field treatment feasibility

2015 ◽  
Vol 5 (2) ◽  
pp. 99-105 ◽  
Author(s):  
Maura L. Kirk ◽  
Shikui Tang ◽  
Huifang Zhai ◽  
Neha Vapiwala ◽  
Curtiland Deville ◽  
...  
Keyword(s):  
Treatment Planning ◽  
Proton Treatment ◽  
Planning Technique ◽  
Single Field

Experiments in Bright-Field Imaging with Hollow-Cone Illumination

1981 ◽  
Vol 39 ◽  
pp. 226-227
Author(s):  
W. Kunath ◽  
K. Weiss ◽  
E. Zeitler
Keyword(s):  
Signal To Noise Ratio ◽  
Carbon Support ◽  
Electronic System ◽  
Optic Axis ◽  
Hollow Cone ◽  
Signal To Noise ◽  
Bright Field ◽  
Noise Ratio ◽  
Single Field ◽  
Field Imaging

Bright-field images taken with axial illumination show spurious high contrast patterns which obscure details smaller than 15 ° Hollow-cone illumination (HCI), however, reduces this disturbing granulation by statistical superposition and thus improves the signal-to-noise ratio. In this presentation we report on experiments aimed at selecting the proper amount of tilt and defocus for improvement of the signal-to-noise ratio by means of direct observation of the electron images on a TV monitor.Hollow-cone illumination is implemented in our microscope (single field condenser objective, Cs = .5 mm) by an electronic system which rotates the tilted beam about the optic axis. At low rates of revolution (one turn per second or so) a circular motion of the usual granulation in the image of a carbon support film can be observed on the TV monitor. The size of the granular structures and the radius of their orbits depend on both the conical tilt and defocus.

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