Purpose: Surface-guided radiation-therapy (SGRT) systems are being adopted into clinical practice for patient setup and motion monitoring. However, commercial systems remain cost prohibitive to resource-limited clinics around the world. Our aim is to develop and validate a smartphone-based application using LiDAR cameras (such as on recent Apple iOS devices) for facilitating SGRT in low-resource centers. The proposed SGRT application was tested at multiple institutions and validated using phantoms and volunteers against various commercial systems to demonstrate feasibility.
Methods And Materials: An iOS application was developed in Xcode and written in Swift using the Augmented-Reality (AR) Kit and implemented on an Apple iPhone 13 Pro with a built-in LiDAR camera. The application contains multiple features: 1) visualization of both the camera and depth video feeds (at a ∼60Hz sample-frequency), 2) region-of-interest (ROI) selection over the patient's anatomy where motion is measured, 3) chart displaying the average motion over time in the ROI, and 4) saving/exporting the motion traces and surface map over the ROI for further analysis. The iOS application was tested to evaluate depth measurement accuracy for: 1) different angled surfaces, 2) different field-of-views over different distances, and 3) similarity to a commercially available SGRT systems (Vision RT AlignRT and Varian IDENTIFY) with motion phantoms and healthy volunteers across 3 institutions. Measurements were analyzed using linear-regressions and Bland-Altman analysis.
Results: Compared with the clinical system measurements (reference), the iOS application showed excellent agreement for depth (r = 1.000, P < .0001; bias = -0.07±0.24 cm) and angle (r = 1.000, P < .0001; bias = 0.02±0.69°) measurements. For free-breathing traces, the iOS application was significantly correlated to phantom motion (institute 1: r = 0.99, P < .0001; bias =-0.003±0.03 cm; institute 2: r = 0.98, P < .0001; bias = -0.001±0.10 cm; institute 3: r = 0.97, P < .0001; bias = 0.04±0.06 cm) and healthy volunteer motion (institute 1: r = 0.98, P < .0001; bias = -0.008±0.06 cm; institute 2: r = 0.99, P < .0001; bias = -0.007±0.12 cm; institute 3: r = 0.99, P < .0001; bias = -0.001±0.04 cm).
Conclusions: The proposed approach using a smartphone-based application provides a low-cost platform that could improve access to surface-guided radiation therapy accounting for motion.
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http://dx.doi.org/10.1016/j.prro.2023.11.013 | DOI Listing |
Digit Health
December 2024
School of Physiotherapy, RCSI University of Medicine and Health Sciences, Dublin, Ireland.
Objective: Given the well-accepted health benefits, it is important to identify scalable ways to support people with long-term conditions (LTCs) to remain physically active. This systematic review aimed to evaluate the effect of digital tools on the maintenance of physical activity (PA) amongst this population.
Methods: Electronic databases were searched for randomised controlled trials investigating the effect of digital tools on PA maintenance at least three months post-intervention compared with a non-digital control in participants with long-term conditions.
Food Funct
December 2024
State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, Jiangxi, PR China.
Food allergies are pathological adverse reactions against harmless dietary proteins. While studies have shown the involvement of host metabolic changes (, lipid metabolism and amino acid metabolism) in the development of food allergy (FA), the adaptive changes in glucose metabolism induced by food allergen exposure remain largely unclear. In this study, BALB/c mice were sensitized intraperitoneally with an ovalbumin (OVA)/aluminum adjuvant, followed by oral OVA challenges to induce anaphylaxis.
View Article and Find Full Text PDFACS Appl Mater Interfaces
December 2024
Institute of Optoelectronics Technology, Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Beijing 100044, China.
This work explores the carrier recombination dynamics of AC-driven quantum dot (QD) light-emitting diodes (AC-QLEDs) and proposes their application in the field of electric field contactless detection. Different sequences of green QD (GQD)/red QD (RQD) bilayer thin films as the emission layer of AC-QLEDs were fabricated via film transfer printing to ensure the complete morphology of each layer. AC-QLEDs with the emission layer as the sequence of GQD + RQD (GR-QLEDs) show a significantly enhanced carrier recombination efficiency due to its stable energy level structure, achieving the highest peak brightness ever recorded for vertically emitting brightness of 1648.
View Article and Find Full Text PDFInflammopharmacology
December 2024
Department of Zoology, Government College University, Faisalabad, 38000, Pakistan.
Berberine (BBR), an alkaloid derivative mostly found in Oregon grapes and barberry shoots, has several medical properties, including anti-microbial, anti-tumorigenic, and anti-inflammatory properties. As such, it is a superior alternative to presently recommended medications. From previous researches, which showed that BBR has anti-arthritic qualities by blocking a number of inflammatory signalling pathways.
View Article and Find Full Text PDFInt J Ment Health Nurs
February 2025
Alice Lee Centre for Nursing Studies, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
Adolescents are susceptible to developing depression and anxiety, and educational interventions could improve their mental well-being. This systematic review aimed to evaluate the effectiveness of universal educational prevention interventions in improving mental health literacy, depression, and anxiety among adolescents. Eight electronic databases were searched until June 2024: Cochrane Library, PubMed, EMBASE, CINAHL, PsycINFO, Scopus, Web of Science, ProQuest Dissertations, and Theses Global.
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