Theory, method, and test tools for determination of 3D MTF characteristics in cone‐beam CT

2021 ◽  
Author(s):  
Pengwei Wu ◽  
John M. Boone ◽  
Andrew M. Hernandez ◽  
Mahadevappa Mahesh ◽  
Jeffrey H. Siewerdsen
Keyword(s):  
Cone Beam Ct ◽  
Cone Beam ◽  
Theory Method

Determination of the temporal and spatial resolution in retrospectively gated cardiac cone-beam CT

2004 ◽  
Author(s):  
Udo van Stevendaal ◽  
Philipp G. C. Begemann ◽  
Joern Borgert ◽  
Ruediger Grewer ◽  
Sascha Krueger ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Temporal And Spatial

SU-GG-I-28: On the Determination of the Beam Output of a Kilovoltage Cone-Beam CT

2010 ◽  
Vol 37 (6Part3) ◽  
pp. 3107-3107
Author(s):  
G Ding ◽  
C Coffey
Keyword(s):  
Cone Beam Ct ◽  
Cone Beam ◽  
Beam Output

scholarly journals Quantification and Assessment of Interfraction Setup Errors Based on Cone Beam CT and Determination of Safety Margins for Radiotherapy

PLoS ONE ◽  
2016 ◽  
Vol 11 (3) ◽  
pp. e0150326 ◽  
Author(s):  
Macarena Cubillos Mesías ◽  
Judit Boda-Heggemann ◽  
Johannes Thoelking ◽  
Frank Lohr ◽  
Frederik Wenz ◽  
...  
Keyword(s):  
Cone Beam Ct ◽  
Cone Beam ◽  
Setup Errors ◽  
Safety Margins

Determination of size-specific exposure settings in dental cone-beam CT

2016 ◽  
Vol 27 (1) ◽  
pp. 279-285 ◽  
Author(s):  
Ruben Pauwels ◽  
Reinhilde Jacobs ◽  
Ria Bogaerts ◽  
Hilde Bosmans ◽  
Soontra Panmekiate
Keyword(s):  
Cone Beam Ct ◽  
Cone Beam

scholarly journals Determination of reproducibility of end-exhaled breath-holding in stereotactic body radiation therapy

2020 ◽  
Vol 61 (6) ◽  
pp. 977-984
Author(s):  
Motoharu Sasaki ◽  
Hitoshi Ikushima ◽  
Kanako Sakuragawa ◽  
Michihiro Yokoishi ◽  
Akira Tsuzuki ◽  
...  
Keyword(s):  
Treatment Planning ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Breath Holding ◽  
Breath Hold ◽  
Dice Similarity Coefficient ◽  
Exhaled Breath ◽  
Metastatic Lung ◽  
Planning Ct

ABSTRACT Methods to evaluate the positional reproducibility of breath-hold irradiation mostly require manual operation. The purpose of this study is to propose a method to determine the reproducibility of breath-hold irradiation of lung tumors between fractions using non-artificial methods. This study included 13 patients who underwent terminal exhaled breath-hold irradiation for primary and metastatic lung cancer. All subjects received a prescribed dose of 60 Gy/8 fractions. The contours of the gross tumor volume (GTV) were extracted by threshold processing using treatment-planning computed tomography (CT) and cone-beam CT (CBCT), which was done just before the beginning of the treatment. The method proposed in this study evaluates the dice similarity coefficient (DSC) and Hausdorff distance (HD) by comparing two volumes, the GTVCTS (GTV obtained from treatment-planning CT) and GTVCBCT (GTV obtained from CBCT). The reference contours for DSC and HD are represented by GTVCTS. The results demonstrated good visual agreement for cases with a DSC of ~0.7. However, apparent misalignment occurred when the DSC was <0.5. HD was >2 mm in 3 out of 13 cases, and when the DSC was ~0.7, the HD was ~1 mm. In addition, cases with greater HD also demonstrated more significant variability. It was found that the DSC and HD evaluation methods for the positional reproducibility of breath-hold irradiation proposed in this study are straightforward and can be performed without the involvement of humans. Our study is of extreme significance in the field of radiation studies.

Sign in / Sign up

Export Citation Format

Share Document