Detector for monitoring potential bleeding during electron intraoperative radiotherapy

Sanchís, E.; Casans, S.; Felici, G.; Garcı́a-Gil, R.; Sanchís-Sánchez, Enrique; Pérez-Calatayud, Ignacio; Pérez-Calatayud, M.J.; Pérez-Calatayud, J.

doi:10.1016/j.ejmp.2018.12.010

Cited by 5 publications

(9 citation statements)

References 14 publications

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“…It is based on a capacitive sensor (C x in Fig. 1) as described in [10,11] and an electronic conditioning circuit based on AC bridge as described in [12]. It also includes a wireless power supply necessary to charge a supercapacitor (SC in Fig.…”

Section: Read-out Circuitmentioning

confidence: 99%

“…As commented above, one of the most important features of the mobile electron linacs is the low SR component, being the x-rays produced by electron bremsstrahlung the main contamination component. The SR with instrumented applicators compared with the standard ones have been also evaluated for the worst-case energy (12 MeV) using the setup described in [10], as shown in Fig. 7.…”

Section: Setup For Measuring the Detector Performance Under Radiationmentioning

confidence: 99%

“…The setup used allows us to establish a minimum standard for the wall of any surgery room [10]. In front of the survey meter a 5 cm thickness PMMA slab was set, enough for shielding the low energy electrons escaping from the applicator, as typically done in this type of measurements [15].…”

Section: Setup For Measuring the Detector Performance Under Radiationmentioning

confidence: 99%

“…To avoid this important risk, the existence of detectors that can show this circumstance is very useful in the clinic. A capacitive based bleeding detector was proposed by Sanchis et al and Garcia-Gil et al [10][11][12] for translucent polymethyl methacrylate applicators (PMMA), as used in the LIAC HWL Mobile linac from Sordina IORT Technologies [13]. A simple capacitive-based detector using a semi-circular geometry was presented in [10].…”

Section: Introductionmentioning

confidence: 99%

“…A capacitive based bleeding detector was proposed by Sanchis et al and Garcia-Gil et al [10][11][12] for translucent polymethyl methacrylate applicators (PMMA), as used in the LIAC HWL Mobile linac from Sordina IORT Technologies [13]. A simple capacitive-based detector using a semi-circular geometry was presented in [10]. In this detector, the measurement process was based on repetitive charge-discharge cycles of the capacitor through a resistor.…”

Section: Introductionmentioning

confidence: 99%

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Embedded bleeding detector into a PMMA applicator for electron intraoperative radiotherapy

et al. 2022

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The aim of this work is to present a ready to industrialize low-cost and easy-to-install bleeding detector for use in intraoperative electron radiation therapy (IOERT). The detector works in stand-alone mode and is embedded into a translucent polymethylmethacrylate (PMMA) applicator avoiding any contact with the patient, which represent a novelty compared to previous designs. The use of this detector will prevent dose misadministration during irradiation in the event of accumulation of fluids in the applicator. Methods: The detector is based on capacitive sensor and wireless power-supply electronics. Both sensor and electronics have been embedded in the applicator, so that any contact with the patient would be avoided. Since access to the tumor can be done through different trajectories, the detector has been calibrated for different tilting angles. Results: The result of the calibration provides us with a fit curve that allows the interpolation of the results at any angle. Comparison of estimated fluid height vs real height gives an error of 1 mm for tilting angles less than 10 • and 2 mm for tilting angles greater than 15 • . This accuracy is better than the one required by clinic. Conclusions: The performance of the bleeding detector was evaluated in situ. No interference was observed between the detector and the beam. In addition, a user-friendly mobile application has been developed to help the surgical team making decisions before and during irradiation. The measurement provided by the mobile application was stable during the irradiation process.

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Section: Read-out Circuitmentioning

confidence: 99%

Section: Setup For Measuring the Detector Performance Under Radiationmentioning

confidence: 99%