SU-F-T-328: Real-Time in Vivo Dosimetry of Prostate SBRT Boost Treatments Using MOSkin Detectors

2016 ◽  
Vol 43 (6Part18) ◽  
pp. 3538-3538
Author(s):  
K Legge ◽  
D Cutajar ◽  
A Wilfert ◽  
J Martin ◽  
A Rozenfeld ◽  
...  
Keyword(s):  
Real Time ◽  
In Vivo Dosimetry

scholarly journals Transient ICD malfunctions during oncologic radiotherapy: a multi-centre, randomized, in-vitro study

2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
E Di Girolamo ◽  
M Appignani ◽  
N Furia ◽  
M Marini ◽  
P De Filippo ◽  
...  
Keyword(s):  
Real Time ◽  
Treatment Plan ◽  
Low Energy ◽  
In Vivo Dosimetry ◽  
Implantable Cardioverter Defibrillators ◽  
Shock Delivery ◽  
Transient Electromagnetic ◽  
Direct Exposure

Abstract Background Direct exposure of implantable cardioverter-defibrillators (ICDs) during radiotherapy is still considered potentially harmful, or even unsafe, by manufacturers and current recommendations. The effects of photon beams on ICDs are unpredictable, depending on multiple factors, and malfunctions may present during exposure. Purpose To evaluate transient ICD malfunctions by direct exposure to doses up to 10 Gy during low-energy RT, forty-three contemporary wireless-enabled ICDs, with at least 4 months to elective replacement indicator (ERI) were evaluated in a real-time in-vitro session in three different centres. Methods All ICDs had baseline interrogation. Single chamber devices were programmed to the VVI/40 mode and dual or triple chamber devices were programmed to the DDD/40 mode. Rate response function and antitachycardia therapies were disabled, with the ventricular tachycardia (VT)/ventricular fibrillation (VF) detection windows still active. A centring computed tomography was performed to build the corresponding treatment plan and the ICDs were blinded randomized to receive either 2-, 5- or 10-Gy exposure by a low photon-energy linear accelerator (6MV) in a homemade water phantom (600 MU/min). The effective dose received by the ICDs was randomly assessed by an in-vivo dosimetry. During radiotherapy, the ICDs were observed in a real-time session using manufacturer specific programmer, and device function (pacing, sensing, programmed parameters, arrhythmia detections) was recorder by the video camera in the bunker throughout the entire photon exposure. All ICDs had an interrogation session immediately after exposure. Results During radiotherapy course, almost all ICDs (93%) recorded major or minor transient electromagnetic interferences. On detail, sixteen ICDs (37.2%) reported atrial and/or ventricular oversensing, with base-rate-pacing inhibition and VT/VF detection. Twenty-four ICDs (55.8%) recorded non clinically relevant noise, and no detections were observed. Only three ICDs (7%) reported neither transient malfunction nor minor noise, withstanding direct radiation exposure. At immediate post-exposure interrogation, the ICDs that recorded major real-time malfunctions had VT/VF detections stored in the device memory. In none of the ICDs spontaneous changes in parameter settings were reported. Malfunctions occurred regardless of either 2-, 5- or 10-Gy photon beam exposure. Conclusions Transient electromagnetic interferences were observed in most of the contemporary ICDs during radiotherapy course, regardless of photon dose. To avoid potentially life-threatening ICD malfunctions such as pacing inhibition or inappropriate shock delivery, magnet application on the pocket site or ICD reprogramming to the asynchronous mode are still suggested in ICD patients ongoing even low energy radiotherapy exposure. Funding Acknowledgement Type of funding source: None

scholarly journals OC-0063: Real-time in-vivo dosimetry in HDR prostate brachytherapy

2016 ◽  
Vol 119 ◽  
pp. S27-S28
Author(s):  
J. Mason ◽  
B. Al-Qaisieh ◽  
A. Henry ◽  
P. Bownes
Keyword(s):  
Real Time ◽  
In Vivo Dosimetry ◽  
Prostate Brachytherapy

scholarly journals OC-0174: Real-time in-vivo dosimetry for HDR prostate brachytherapy

2015 ◽  
Vol 115 ◽  
pp. S85-S86
Author(s):  
A. Mamo ◽  
J. Mason ◽  
B. Al-Qaisieh ◽  
A. Henry ◽  
D. Okkalides ◽  
...  
Keyword(s):  
Real Time ◽  
In Vivo Dosimetry ◽  
Prostate Brachytherapy

Real-Time In Vivo Dosimetry With MOSFET Detectors in Serial Tomotherapy for Head and Neck Cancer Patients

2011 ◽  
Vol 80 (5) ◽  
pp. 1581-1588 ◽  
Author(s):  
Zhen-Yu Qi ◽  
Xiao-Wu Deng ◽  
Shao-Min Huang ◽  
Almon Shiu ◽  
Michael Lerch ◽  
...  
Keyword(s):  
Head And Neck Cancer ◽  
Head And Neck ◽  
Real Time ◽  
Cancer Patients ◽  
Neck Cancer ◽  
In Vivo Dosimetry

MO-FF-A1-04: Toward a True Real-Time in Vivo Dosimetry System Using Plastic Scintillators

2009 ◽  
Vol 36 (6Part21) ◽  
pp. 2709-2709
Author(s):  
L Archambault ◽  
T Briere ◽  
F Poenisch ◽  
L Beaulieu ◽  
S Beddar
Keyword(s):  
Real Time ◽  
In Vivo Dosimetry ◽  
Dosimetry System ◽  
Plastic Scintillators

910Noise-related malfunctions in modern ICDs during oncologic radiotherapy: a multicentre, real-time, in-vitro observation

EP Europace ◽  
2020 ◽  
Vol 22 (Supplement_1) ◽  
Author(s):  
E Di Girolamo ◽  
M Appignani ◽  
M Marini ◽  
P De Filippo ◽  
C Leidi ◽  
...  
Keyword(s):  
Real Time ◽  
Treatment Plan ◽  
Video Camera ◽  
Low Energy ◽  
In Vivo Dosimetry ◽  
Implantable Cardioverter Defibrillators ◽  
Shock Delivery ◽  
Photon Exposure

Abstract Funding Acknowledgements None Background Direct photon exposure of implantable cardioverter-defibrillators (ICDs) during radiotherapy is still considered not recommended, or even unsafe, by manufacturers and guidelines. The effects of photon beams on ICDs are unpredictable, depending on multiple factors, and electromagnetic interferences (EMIs) may present during exposure. Purpose To evaluate transient ICD malfunctions by direct exposure to doses up to 10 Gy during low-energy radiotherapy, 36 contemporary wireless-enabled ICDs, with at least 4 months to elective replacement indicator (E.R.I.) were evaluated in a realtime in-vitro session. Methods All ICDs had baseline interrogation. Single chamber devices were programmed in the VVI/40 mode and dual or triple chamber devices were programmed in the DDD/40 mode. Rate response function and antitachycardia therapies were disabled, with the ventricular tachycardia (VT)/ventricular fibrillation (VF) detection windows still working. A centering computed tomography was performed to build the corresponding treatment plan and the ICDs were blinded randomized to receive either 2, 5 or 10 Gy exposure by a low photon-energy linear accelerator (6MV) in a homemade water phantom (600 MU/min). The effective dose received by the ICDs was randomly assessed by an in-vivo dosimetry. During radiotherapy course, the devices were observed in a real-time session using manufacturer specific programmer, and ICD function (pacing, sensing, programmed parameters, detection) was recorder by the video camera in the bunker throughout the entire photon exposure. All ICDs had an interrogation session immediately after exposure. Results During radiotherapy course, almost all ICDs (90.9%) recorded major or minor transient EMIs. On detail, 16 ICDs (44.4%) reported EMI-related atrial and/or ventricular oversensing, with base-rate-pacing inhibition and VT/VF detection. 16 ICDs (44.4%) recorded not clinically relevant minor EMIs, and no detections were observed. Only 4 ICDs (11.2%) reported neither transient malfunction nor minor EMIs, withstanding direct radiation exposure. At immediate post-exposure interrogation, the ICDs that recorded major real-time malfunctions had VT/VF detections stored in the device memory. In none of the ICDs spontaneous changes in parameter settings were reported. EMI-related malfunctions occurred regardless of either 2, 5 or 10 Gy photon beam exposure. Conclusions Transient EMIs were observed in most of the contemporary ICDs. To avoid potentially life-threatening ICD malfunctions such as pacing inhibition or inappropriate shock delivery, magnet application on the pocket site or reprogramming in the asynchronous mode are still suggested in ICD patients ongoing even low energy radiotherapy exposure.

EP-1335 MULTICHANNEL/REAL-TIME INTRACAVITARY IN VIVO DOSIMETRY USING FIBER-COUPLED RADIOLUMINESCENCE AND OSL OF AL2O3:C

2012 ◽  
Vol 103 ◽  
pp. S507
Author(s):  
S. Magne ◽  
E. Spasic ◽  
S. Deloule ◽  
L. de Carlan ◽  
I. Aubineau-Lanièce ◽  
...  
Keyword(s):  
Real Time ◽  
In Vivo Dosimetry

2410Oncologic radiotherapy-induced implantable cardioverter-defibrillator malfunctions: a real-time, in-vitro evaluation

2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
E Di Girolamo ◽  
M Faustino ◽  
N Furia ◽  
M Appignani ◽  
M Marini ◽  
...  
Keyword(s):  
Real Time ◽  
Treatment Plan ◽  
Low Energy ◽  
In Vivo Dosimetry ◽  
Implantable Cardioverter Defibrillators ◽  
Shock Delivery ◽  
Transient Electromagnetic ◽  
Direct Exposure

Abstract Background Direct exposure of implantable cardioverter-defibrillators (ICDs) during radiotherapy is still considered not recommended, or even unsafe, by manufacturers and guidelines. The effects of photon beams on ICDs are unpredictable, depending on multiple factors, and malfunctions may occur during exposure. Purpose To evaluate transient ICD malfunctions by direct exposure to doses up to 10 Gy during low-energy radiotherapy, 33 contemporary wireless-enabled ICDs, with at least 4 months to elective replacement indicator (E.R.I.) were evaluated in a realtime in-vitro session. Methods All ICDs had baseline interrogation. Single chamber ICDs were programmed in the VVI/40 mode and dual or triple chamber ICDs were programmed in the DDD/40 mode. Rate response function and antitachycardia therapies were disabled, with the ventricular tachycardia (VT)/ventricular fibrillation (VF) detection windows still active. A centering computed tomography was performed to build the corresponding treatment plan and the ICDs were blinded randomized to receive either 2, 5 or 10 Gy exposure by a low photon-energy linear accelerator (6MV) in a homemade water phantom (600 MU/min). The effective dose received by the ICDs was assessed by an in-vivo dosimetry. During radiotherapy, the devices were observed in a real-time session using manufacturer specific programmer, and ICD function (pacing, sensing, programmed parameters, detection) was recorder by the video camera in the bunker throughout the entire photon exposure. All ICDs had an interrogation session immediately after exposure. Results During radiotherapy course, almost all ICDs (90.9%) recorded major or minor transient electromagnetic interferences. On detail, 13 ICDs (39.4%) reported atrial and/or ventricular oversensing, with base-rate-pacing inhibition and VT/VF detection. 16 ICDs (48.5%) recorded non clinically relevant noise, and no detections were observed. Only 4 ICDs (12.1%) reported neither transient malfunction nor minor noise, withstanding direct radiation exposure. At immediate post-exposure interrogation, the ICDs that recorded major real-time malfunctions had VT/VF detections stored in the device memory. In none of the ICDs spontaneous changes in parameter settings were reported. Malfunctions occurred regardless of either 2, 5 or 10 Gy photon beam exposure. Conclusions Transient electromagnetic interferences were observed in most of the contemporary ICDs during radiotherapy course, regardeless of photon dose. To avoid potentially life-threatening ICD malfunctions such as pacing inhibition or inappropriate shock delivery, magnet application on the pocket site or reprogramming devices in the asynchronous mode are still suggested in ICD patients ongoing even low energy radiotherapy exposure. Acknowledgement/Funding None

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