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

Farzaneh, Mohammad Javad Keikhai; Nasseri, Shahrokh; Momennezhad, Mehdi; Salek, Roham

doi:10.4103/jmss.jmss_35_18

Cited by 6 publications

(4 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A total of 3 studies investigated breathing motion using laser devices based on the same working principle [31,38,39]. Figure 1 provides the working principle of the instruments used in these studies.…”

Section: Recent Developmentsmentioning

confidence: 99%

“…The two studies showed that laser-based devices had high performance when used in clinical conditions. Farzaneh et al [31] comprehensively designed and constructed a laser-based breathing monitoring instrument, including the electronic circuits, assembly hardware (box holder and LCD holder), software for processing the signal, and phantom.…”

Section: Recent Developmentsmentioning

confidence: 99%

“…Furthermore, the pressure represented the respiratory rate of individuals. Although it was less invasive compared to ionization-based monitoring, this device was not convenient for all individuals [31].…”

Section: Recent Developmentsmentioning

confidence: 99%

See 2 more Smart Citations

Recent Technological Advancements in Respiratory Gating Devices

Muhamadi,

Sudarmaji,

Pawiro

2023

Indonesian Journal of Cancer

View full text Add to dashboard Cite

Background: The occurrence of motion in the thoracoabdominal region during radiotherapy treatment is an inherent challenge affecting the accuracy of the radiation beam. To address this challenge, a margin is often incorporated to compensate for the motion, but it has been reported to have several limitations. Consequently, respiratory gating has emerged as an integrated feature within radiotherapy-related machines. This innovative approach is designed to overcome motion-related challenges, leading to a reduction in the required margin and an improvement in the accuracy of the radiation beam. Methods: This study reviews the literature published in English between 2012 to 2021 regarding breathing monitoring devices used in the clinical or research stage. Furthermore, articles published before 2000 were traced to strengthen the theories. Results: Several monitoring devices had been reported to have respiratory gating purposes, but some were not equipped for this function. Furthermore, these devices were often developed using non-contact equipment, such as lasers and cameras, to provide accurate and precise measurements. One of their key advantages is the lack of physical attachment to the patients, thereby preserving comfort. The development of respiratory gating devices had significant potential to enhance the quality of radiotherapy treatment. This was manifested through more effective tumor and organ treatment and reduced toxicity. These benefits had the potential to extend the life expectancy of patients with respiratory-related cancer. Conclusions: Based on the results, respiratory gating was an advantageous technique in radiotherapy treatment. The development of respiratory gating devices enhanced patient comfort and the effectiveness of treatment.

show abstract

Section: Recent Developmentsmentioning

confidence: 99%

Section: Recent Developmentsmentioning

confidence: 99%

See 1 more Smart Citation

Recent Technological Advancements in Respiratory Gating Devices

Muhamadi,

Sudarmaji,

Pawiro

2023

Indonesian Journal of Cancer

View full text Add to dashboard Cite

show abstract

“…The patients were scanned in the supine position using a breast board while their left arm was placed above the head. To perform DIBH, a novel system was used as a house respiratory gating system [22]. This system uses the CD22-100AM122 distance meter laser sensor.…”

Section: Ct Scanmentioning

confidence: 99%

Evaluation of the heart and lung dosimetric parameters in deep inspiration breath hold using 3D Slicer

et al. 2020

Self Cite

View full text Add to dashboard Cite

The present study was conducted to compare dosimetric parameters for the heart and left lung between free breathing (FB) and deep inspiration breath hold (DIBH) and determine the most important potential factors associated with increasing the lung dose for left-sided breast radiotherapy using image analysis with 3D Slicer software. Materials and Methods: Computed tomography-simulation scans in FB and DIBH were obtained from 17 patients with left-sided breast cancer. After contouring, three-dimensional conformal plans were generated for them. The prescribed dose was 50 Gy to the clinical target volume. In addition to the dosimetric parameters, the irradiated volumes and both displacement magnitudes and vectors for the heart and left lung were assessed using 3D Slicer software. Results: The average of the heart mean dose (D mean) decreased from 5.97 to 3.83 Gy and V 25 from 7.60% to 3.29% using DIBH (p < 0.001). Furthermore, the average of D mean for the left lung was changed from 8.67 to 8.95 Gy (p = 0.389) and V 20 from 14.84% to 15.44% (p = 0.387). Both of the absolute and relative irradiated heart volumes decreased from 42.12 to 15.82 mL and 8.16% to 3.17%, respectively (p < 0.001); however, these parameters for the left lung increased from 124.32 to 223.27 mL (p < 0.001) and 13.33% to 13.99% (p = 0.350). In addition, the average of heart and left lung displacement magnitudes were calculated at 7.32 and 20.91 mm, respectively. Conclusion: The DIBH is an effective technique in the reduction of the heart dose for tangentially treated left sided-breast cancer patients, without a detrimental effect on the left lung.

show abstract

Tailoring PTV expansion to improve the dosimetry of post modified radical mastectomy intensity‐modulated radiotherapy for left‐sided breast cancer patients by using 4D CT combined with cone beam CT

Zhang

Huang

et al. 2021

J Applied Clin Med Phys

View full text Add to dashboard Cite

Purpose: Our study aimed to improve the dosimetry of post modified radical mastectomy intensity-modulated radiotherapy (PMRM-IMRT) for left-sided breast cancer patients by tailoring and minimizing PTV expansion three-dimensionally utilizing 4DCT combined with on-board cone beam CT (CBCT).Methods: We enrolled a total of 10 consecutive left-sided breast cancer patients to undergo PMRM-IMRT. We measured the intra-fractional CTV displacement attributed to respiratory movement by defining 9 points on the left chest wall and quantifying their displacement by using the 4D CT, and measured the inter-fractional CTV displacement resulting from the integrated effect of respiratory movement, thoracic deformation and set up errors by using CBCT. We created 3 different PMRM-IMRT plans for each of the patients using PTV t (tailored PTV expansion three-dimensionally), PTV 0.5 and PTV 0.7 (isotropic 0.5-cm and isotropic 0.7-cm expanding margin of CTV), respectively. We performed paired samples t test to establish a hierarchy in terms of plan quality and dosimetric benefits. P < 0.05 was considered statistically significant.Results: The inter-fractional CTV displacement (2.6 ± 2.2 mm vertically, 2.8 ± 2.3 mm longitudinally, and 1.7 ± 1.2 mm laterally) measured by CBCT was much larger than the intra-fractional one (0.5 ± 0.5 mm vertically, 0.5 ± 1.0 mm longitudinally, and 0.3 ± 0.3 mm laterally, respectively) measured by 4D CT. Intensitymodulated radiotherapy with tailored PTV expansion based on inter-fractional CTV displacement had dosimetrical advantages over those with PTV 0.5 or those with PTV 0.7 owing to its perfect PTV dose coverage and better OARs sparing(especially of heart and left lung).

show abstract

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

Cited by 6 publications

References 27 publications

Recent Technological Advancements in Respiratory Gating Devices

Recent Technological Advancements in Respiratory Gating Devices

Evaluation of the heart and lung dosimetric parameters in deep inspiration breath hold using 3D Slicer

Tailoring PTV expansion to improve the dosimetry of post modified radical mastectomy intensity‐modulated radiotherapy for left‐sided breast cancer patients by using 4D CT combined with cone beam CT

Contact Info

Product

Resources

About