scholarly journals Patient Positioning Accuracy in Stereotactic Radiosurgery With Mask Fixation and Cone Beam CT

2017 ◽  
Vol 99 (2) ◽  
pp. E740-E741 ◽  
Author(s):  
Y. Xu ◽  
J.S. Silverman ◽  
K.L. Du ◽  
I.J. Das ◽  
D. Kondziolka
Keyword(s):  
Stereotactic Radiosurgery ◽  
Cone Beam Ct ◽  
Patient Positioning ◽  
Cone Beam ◽  
Positioning Accuracy

TH-C-J-6B-05: Coordinate Transformation of KV Cone Beam CT Acquired with Prototype Flat Panel Mobile C-Arm for Patient Positioning Applications

2005 ◽  
Vol 32 (6Part21) ◽  
pp. 2159-2160 ◽  
Author(s):  
S Sorensen ◽  
M Mitschke ◽  
P Medin ◽  
N Agazaryan ◽  
S Tenn ◽  
...  
Keyword(s):  
Coordinate Transformation ◽  
Cone Beam Ct ◽  
Patient Positioning ◽  
Cone Beam ◽  
Flat Panel

SU-GG-T-294: A New Cone-Beam CT Daily QA Phantom for Stereotactic Radiosurgery

2008 ◽  
Vol 35 (6Part13) ◽  
pp. 2792-2793
Author(s):  
Z Zhao ◽  
S Duvvuri ◽  
S Flampouri ◽  
D Horne ◽  
S Huh
Keyword(s):  
Stereotactic Radiosurgery ◽  
Cone Beam Ct ◽  
Cone Beam

scholarly journals Reducing dose of Cone-Beam CT used for patient positioning in radiooncology

2021 ◽  
Vol 7 (2) ◽  
pp. 227-230
Author(s):  
Verena Gorges ◽  
Waldemar Zylka
Keyword(s):  
Dose Reduction ◽  
Cone Beam Ct ◽  
Patient Positioning ◽  
Cone Beam ◽  
Thoracic Region ◽  
Analysis Software ◽  
Tumor Patients ◽  
Ct Dose ◽  
Full Rotation ◽  
Ct Dose Index

Abstract Cone-Beam computed tomography (CBCT) has become the most important component of modern radiotherapy for positioning tumor patients directly before treatment. In this work we investigate alternations to standard acquisition protocol, called preset, for patients with a tumor in the thoracic region. The effects of the changed acquisition parameters on the image quality are evaluated using the Catphan Phantom and the image analysis software Smári. The weighted CT dose index (CTDIW) is determined in each case and the effects of the different acquisition protocols on the patient dose are classified accordingly. Additionally, the clinical suitability of alternative presets is tested by investigating correctness of image registration using the CIRS thorax phantom. The results show that a significant dose reduction can be achieved. It can be reduced by 51% for a full rotation by adjusting the gantry speed. A more patientspecific uptake protocol for patients with laterally located tumor was created which allows a dose reduction of 54%.

Relevance of head motion in dental cone-beam CT scanner images depending on patient positioning

2008 ◽  
Vol 3 (3-4) ◽  
pp. 249-255 ◽  
Author(s):  
Marco Bontempi ◽  
Matteo Bettuzzi ◽  
Franco Casali ◽  
Alessandro Pasini ◽  
Alberto Rossi ◽  
...  
Keyword(s):  
Cone Beam Ct ◽  
Patient Positioning ◽  
Cone Beam ◽  
Head Motion ◽  
Ct Scanner
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