Design and construction of a laser-based respiratory gating system for implementation of deep inspiration breathe hold technique in radiotherapy clinics

Farzaneh, M. J. K. and Nasseri, S. and Momennezhad, M. and Salek, R. (2018) Design and construction of a laser-based respiratory gating system for implementation of deep inspiration breathe hold technique in radiotherapy clinics. Journal of Medical Signals and Sensors, 8 (4). pp. 253-262.

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Abstract

Background: Deep inspiration breath-hold (DIBH) is known as a radiotherapy method for the treatment of patients with left-sided breast cancer. In this method, patient is under exposure only while he/she is at the end of a deep inspiration cycle and holds his/her breath. In this situation, the volume of the lung tissue is enhanced and the heart tissue is pushed away from the treating breast. Therefore, heart dose of these patients, using DIBH, experiences a considerable decline compared to free breathing treatment. There are a few commercialized systems for implementation of DIBH in invasive or noninvasive manners. Methods: We present a novel constructed noninvasive DIBH device relied on a manufacturing near-field laser distance meter. This in-house constructed system is composed of a CD22-100AM122 laser sensor combined with a data acquisition system for monitoring the breathing curve. Qt Creator (a cross-platform JavaScript, QML, and C++-integrated development environment that is part of the SDK for development of the Qt Graphical User Interface application framework) and Keil MDK-ARM (a programming software where users can write in C and C++ and assemble for ARM-based microcontrollers) are used for composing computer and microcontroller programs, respectively. Results: This system could be mounted in treatment or computed tomography (CT) room at suitable cost; it is also easy to use and needs a little training for personnel and patients. The system can assess the location of chest wall or abdomen in real time with high precision and frequency. The performance of CD22-100AM122 demonstrates promise for respiratory monitoring for its fast sampling rate as well as high precision. It can also deliver reasonable spatial and temporal accuracy. The patient observes his/her breathing waveform through a 7” 1024 × 600 liquid crystal display and gets some instructions during treatment and CT sessions by an exploited algorithm called “interaction scenario” in this study. The system is also noninvasive and well sustainable for patients. Conclusions: The constructed system has true real-time operation and is rapid enough for delivering clear contiguous monitoring. In addition, in this system, we have provided an interaction scenario option between patient and CT or Linac operator. In addition, the constructed system has the capability of sending triggers for turning on and off CT or Linac facilities. In this concern, the system has the superiority of combining a plenty of characteristics. © 2018 Journal of Medical Signals & Sensors.

Item Type: Article
Additional Information: Export Date: 16 February 2020 Correspondence Address: Nasseri, S.; Department of Medical Physics, Faculty of Medicine, Mashhad University of Medical Sciences, Pardis-e-daneshgah, Vakil Abad Blvd, Iran; email: naserish@mums.ac.ir
Uncontrolled Keywords: Deep inspiration breath-hold Gated radiotherapy Respiratory monitoring system Respiratory-gated treatment Tumor tracking Article breast cancer breath holding cancer radiotherapy deep inspiration inhalation measurement accuracy non invasive procedure priority journal radiation dose radiation exposure reproducibility
Subjects: WF Respiratory System
WN Radiology . Diagnostic Imaging
QZ pathology-neoplasms-Genetics
Divisions: Mashhad University of Medical Sciences
Depositing User: lib2 lib2 lib2
Date Deposited: 20 May 2020 07:33
Last Modified: 20 May 2020 07:33
URI: http://eprints.mums.ac.ir/id/eprint/17280

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