Intrafraction motion tracking for MR-Linac prostate radiotherapy

10.33540/770 ◽  
2021 ◽  
Author(s):  
◽  
Daan Maarten de Muinck Keizer
Keyword(s):  
Motion Tracking ◽  
Prostate Radiotherapy ◽  
Intrafraction Motion

scholarly journals Comparison of dose decrement from intrafraction motion for prone and supine prostate radiotherapy

2012 ◽  
Vol 104 (2) ◽  
pp. 199-204 ◽  
Author(s):  
Jeffrey R. Olsen ◽  
Parag J. Parikh ◽  
Michael Watts ◽  
Camille E. Noel ◽  
Kenneth W. Baker ◽  
...  
Keyword(s):  
Prostate Radiotherapy ◽  
Intrafraction Motion

scholarly journals Single-fraction prostate stereotactic body radiotherapy: Dose reconstruction with electromagnetic intrafraction motion tracking

2021 ◽  
Vol 156 ◽  
pp. 145-152
Author(s):  
Maud Jaccard ◽  
Stefanie Ehrbar ◽  
Raymond Miralbell ◽  
Tobias Hagen ◽  
Nikolaos Koutsouvelis ◽  
...  
Keyword(s):  
Stereotactic Body Radiotherapy ◽  
Motion Tracking ◽  
Dose Reconstruction ◽  
Single Fraction ◽  
Intrafraction Motion ◽  
Radiotherapy Dose

Soft-tissue prostate intrafraction motion tracking in 3D cine-MR for MR-guided radiotherapy

2019 ◽  
Vol 64 (23) ◽  
pp. 235008 ◽  
Author(s):  
D M de Muinck Keizer ◽  
L G W Kerkmeijer ◽  
M Maspero ◽  
A Andreychenko ◽  
J R N van der Voort van Zyp ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Motion Tracking ◽  
Intrafraction Motion ◽  
Cine Mr

Influence of intrafraction motion on margins for prostate radiotherapy

2006 ◽  
Vol 65 (2) ◽  
pp. 548-553 ◽  
Author(s):  
Dale W. Litzenberg ◽  
James M. Balter ◽  
Scott W. Hadley ◽  
Howard M. Sandler ◽  
Twyla R. Willoughby ◽  
...  
Keyword(s):  
Prostate Radiotherapy ◽  
Intrafraction Motion

Calypso® 4D Localization System: a review

2014 ◽  
Vol 13 (4) ◽  
pp. 473-483 ◽  
Author(s):  
C. Silva ◽  
D. Mateus ◽  
M. Eiras ◽  
S. Vieira
Keyword(s):  
Multileaf Collimator ◽  
Prostate Cancer Treatment ◽  
Localization System ◽  
Prostate Radiotherapy ◽  
Intrafraction Motion ◽  
Advantages And Disadvantages ◽  
System A ◽  
Electromagnetic Localization ◽  
Tumour Target ◽  
Electromagnetic Transponders

AbstractPurposeCalypso® 4D Localization System is a system based on electromagnetic transponders detection enabling precise 3D localisation and continuous tracking of tumour target. This review intended to provide information in order to (1) show how Calypso® 4D Localization System works, (2) to present advantages and disadvantages of this system, (3) to gather information from several clinical studies and, finally, (4) to refer Calypso® System as a tool in dynamic multileaf collimator studies for target motion compensation.MethodsA structured search was carried out on B-On platform. The key words used in this research were ‘Calypso’, ‘Transponder’, ‘Electromagnetic Localization’, ‘Electromagnetic Tracking’, ‘Target Localization’, ‘Intrafraction Motion’ and ‘DMLC’.ReviewTreatment the implanted transponders are excited by an electromagnetic field and resonate back. These frequencies are detected and Calypso® software calculates the position of the transponders. If the movement detected is larger than the limits previously defined, irradiation can be stopped. The system has been proven to be submillimetre accurate.DiscussionCalypso® System has been presented as an accurate tool in prostate radiotherapy treatments. The application of this system to other clinical sites is being developed.ConclusionThe Calypso® System allows real-time localisation and monitoring of the target, without additional ionising radiation administration. It has been a very useful tool in prostate cancer treatment.

Dosimetric Effect of Intrafraction Motion and Residual Setup Error for Image-Guided Hypofractionated Prostate Radiotherapy

2011 ◽  
Vol 81 (2) ◽  
pp. S844-S845
Author(s):  
N. Tyagi ◽  
A. Qin ◽  
C. Shah ◽  
L. Kestin ◽  
A. Martinez ◽  
...  
Keyword(s):  
Setup Error ◽  
Prostate Radiotherapy ◽  
Intrafraction Motion ◽  
Image Guided

Effect of ProSpare (PS), a rectal obturator, on inter- and intrafraction prostate motion and anorectal doses in prostate radiotherapy (RT).

2016 ◽  
Vol 34 (2_suppl) ◽  
pp. e633-e633
Author(s):  
Julia Murray ◽  
Helen McNair ◽  
Emma Alexander ◽  
Tuathan O'Shea ◽  
Karen Thomas ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Controlled Trial ◽  
Cone Beam Ct ◽  
Prostate Radiotherapy ◽  
Intrafraction Motion ◽  
Prostate Motion ◽  
Gi Toxicity ◽  
Single Use ◽  
Rectal Filling ◽  
To Receive

e633 Background: PS is a single use, self-insertable endorectal device designed as a daily image-guidance tool for prostate cancer RT. Rectal filling is a significant factor in prostate motion. We investigated the effect of PS on inter- and intrafraction prostate motion and its effect on anorectal dosimetry. Methods: 19 patients with localized prostate cancer were randomized to receive prostate RT with PS either in the 1st or 2nd half of treatment. For each patient two planning CT scans were acquired, without and with PS. Contours were delineated by one physician and planned with a forward multi-segment technique to a dose of 74Gy/37F. Dose surface histograms were created (VODCA). In all patients, 3 electromagnetic transponders (EM) were implanted into the prostate and daily online image-guided RT was performed using either cone-beam CT (Elekta) or Calypso–based localization with tracking. Interfraction systematic (Σ) and random (σ) errors were estimated for bone matching without and with PS using EM position as reference. CTV-PTV margins were generated using the Van Herk formula. In-house code was used to analyse intrafraction motion recorded by Calypso of the EM centroid in the RL, SI and AP planes for individual fractions. A 2-way ANOVA test (SPSS v22) was used to determine if PS had an effect on maximal intrafraction prostate displacement. Results: See Table. Conclusions: PS affects the dosimetric pattern to the anal canal and rectum and this may impact GI toxicity. Also, PS stabilizes the prostate, which could enable reduced planning margins. PS will now be assessed in post-prostatectomy RT within a randomized controlled trial, POPS. Clinical trial information: 11814. [Table: see text] [Table: see text] [Table: see text]

Physiologic Studies Provide New Perspectives on Early Speech Development

2010 ◽  
Vol 20 (2) ◽  
pp. 29-36
Author(s):  
Erin M. Wilson ◽  
Ignatius S. B. Nip
Keyword(s):  
Motor Control ◽  
Motor Development ◽  
Motion Tracking ◽  
Speech Development ◽  
Speech Motor Control ◽  
Therapeutic Approaches ◽  
Facial Motion ◽  
Disordered Speech ◽  
Speech Motor ◽  
Physiologic Data

Abstract Although certain speech development milestones are readily observable, the developmental course of speech motor control is largely unknown. However, recent advances in facial motion tracking systems have been used to investigate articulator movements in children and the findings from these studies are being used to further our understanding of the physiologic basis of typical and disordered speech development. Physiologic work has revealed that the emergence of speech is highly dependent on the lack of flexibility in the early oromotor system. It also has been determined that the progression of speech motor development is non-linear, a finding that has motivated researchers to investigate how variables such as oromotor control, cognition, and linguistic factors affect speech development in the form of catalysts and constraints. Physiologic data are also being used to determine if non-speech oromotor behaviors play a role in the development of speech. This improved understanding of the physiology underlying speech, as well as the factors influencing its progression, helps inform our understanding of speech motor control in children with disordered speech and provide a framework for theory-driven therapeutic approaches to treatment.

Einfluss der Bildrate auf die Strainanalyse bei zweidimensionalem Wall Motion Tracking in der fetalen Echokardiografie

2017 ◽  
Author(s):  
C Enzensberger ◽  
L Rostock ◽  
M Götte ◽  
A Wolter ◽  
J Herrmann ◽  
...  
Keyword(s):  
Motion Tracking ◽  
Wall Motion
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