Bosten Lake is an important inland freshwater lake in China, which rich fishery resources. However, due to various factors, its resources have declined. The length–weight relationship (LWR) of great significance for fish research and management. This study was based on the samples 17 species collected from 10 sampling points March 2023 November 2024. LWRs were determined, regression parameters coefficient determination ( R 2 ) calculated, condition factor BW/TL 3 analyzed. results showed...

Abstract Background Surface-guided radiation therapy can be used to continuously monitor a patient’s surface motions during radiotherapy by non-irradiating, noninvasive optical imaging technique. In this study, machine learning methods were applied predict external respiratory motion signals and internal liver in therapeutic context. Methods Seven groups of interrelated external/internal samples lasting from 5 6 min collected simultaneously as dataset, D v . Long short-term memory (LSTM)...

Energy use in buildings is a significant contributor to greenhouse gas emissions and climate change; the residential sector uses more than 20% of energy United States. For this reason among others it important implement sustainable design practices construction. Previous research has shown that there are barriers doing so sustainability not main consideration choosing structural system. To improve understanding engineers' attitudes toward sustainability, an opinion survey was conducted...

Purpose Applying statistical process control (SPC) to intensity‐modulated radiotherapy (IMRT)/volumetric modulated arc therapy (VMAT) patient‐specific quality assurance (PSQA) program was recommended by the American Association of Physics in Medicine Task Group 218 report, but a comprehensive analysis PSQA processes with non‐normal distributions is lacking. This study investigates SPC and capability (PCA) methods for IMRT/VMAT processes. Methods 1119 VMAT PSQAs were performed on three...

Abstract Background Surface-guided radiation therapy (SGRT) employs a non-invasive real-time optical surface imaging (OSI) technique for patient motion monitoring during radiotherapy. The main purpose of this study is to verify the tracking accuracy SGRT respiratory and provide fitting method detect time delay gating. Methods A phantom was utilized simulate using 17 cosine breathing pattern curves with various periods amplitudes. performed by Catalyst™ system. system (with period amplitude...

Cardiac stereotactic body radiotherapy (CSBRT) is an emerging and promising noninvasive technique for treating refractory arrhythmias utilizing highly precise, single or limited-fraction high-dose irradiations. This method promises to revolutionize the treatment of cardiac conditions by delivering targeted therapy with minimal exposure surrounding healthy tissues. However, dynamic nature cardiorespiratory motion poses significant challenges precise delivery dose in CSBRT, introducing...

Extensive laboratory measurements were performed to characterize the hysteretic force properties of a magneto-rheological damper under wide range magnitudes control current and excitation conditions (frequency stroke). A generalized model synthesis is proposed biviscous characteristics using symmetric asymmetric sigmoid functions on basis fundamental generation mechanism. The global realized upon formulation integration component describing saturated hysteresis loop, linear rise...

To explore the dosimetric difference between IMRT-VB plan based on establishment of external expansion structure and virtual bolus (VB) IMRT-SF skin flash (SF) tool Eclipse treatment planning system in postoperative chest wall target intensity modulation radiotherapy breast cancer.Twenty patients with cancer were randomly selected as subjects to develop system. The volume, monitor unit (MU) every single parameters organ at risk (OARs) recorded. Paired t-test was used for normal distribution...

Establishing the tolerance limits of patient-specific quality assurance (PSQA) processes based on gamma passing rate (GPR) by using normal statistical process control (SPC) methods involves certain problems. The aim this study was threefold: (a) to show that heuristic SPC method can replace quantile for establishing in PSQA and is more robust, (b) introduce an iterative procedure "Identify-Eliminate-Recalculate" with unknown states retrospective GPRs, (c) recommend a workflow define actual...

Purpose: Surface-guided radiation therapy (SGRT) application has limitations. This study aimed to explore the relationship between patient characteristics and their external/internal correlation qualitatively assess in a particular patient. Methods: Liver lung cancer patients treated with radiotherapy our institution were retrospectively analyzed. The calculated Spearman coefficient (SCC) SCC after support vector regression (SVR) fitting (SCC svr ). magnitudes of motion tumor external marker...

Objectives: We sought to analyze the characteristics of radioactive lymph nodes with metastatic disease and explore methods for localization sentinel (SLNs) radionuclide in clinically N0 laryngeal hypopharyngeal cancer. Methods: Forty-five patients T1–T4 cancer were recruited. For each patient, a peritumoral submucosal injection 99m Tc-labeled sulfur colloid was administered, node mapping performed by lymphoscintigraphy 2 hours after injection. The SLNs localized during operation handheld...

To develop a low-dose cone beam CT (LD-CBCT) reconstruction method named simultaneous algebraic technique and dual-dictionary learning (SART-DDL) joint algorithm for image guided radiation therapy (IGRT) evaluate its imaging quality clinical application ability.In this retrospective study, 62 CBCT sets from February 2018 to July at west china hospital were randomly collected 42 head neck patients (mean [standard deviation] age, 49.7 [11.4] years, 12 females 30 males). All retrospectively...

Internal tumor motion is commonly predicted using external respiratory signals. However, the internal/external correlation complex and patient-specific. The purpose of this study was to develop various models based on radiomic features computed tomography (CT) images predict accuracy tracking surrogates find accurate reliable algorithms.Images obtained from a total 108 71 patients pathologically diagnosed with lung liver cancers, respectively, were examined. Real-time position monitoring...

To assess the effect of sampling variability on performance individual charts (I-charts) for PSQA and provide a robust reliable method unknown processes.A total 1327 pretreatment PSQAs were analyzed. Different datasets with samples in range 20-1000 used to estimate lower control limit (LCL). Based iterative "Identify-Eliminate-Recalculate" direct calculation without any outlier filtering procedures, five I-charts methods, namely Shewhart, quantile, scaled weighted variance (SWV), standard...

Endophytic fungi are an important source of novel antitumor substances. Previously, we isolated endophytic fungus, Alternaria alstroemeria, from the medicinal plant Artemisia artemisia, whose crude extracts strongly inhibited A549 tumor cells. We obtained a transformant, namely AaLaeA

To find a suitable method for analyzing electronic portal imaging device (EPID) transmission fluence maps the identification of position errors in vivo dose monitoring patients with Graves' ophthalmopathy (GO).Position combining 0-, 2-, and 4-mm left-right (LR), anterior-posterior (AP), superior-inferior (SI) directions delivery 40 GO patient radiotherapy plans to human head phantom were simulated EPID acquired. Dose difference (DD) structural similarity (SSIM) calculated quantify changes...

A semi-active force tracking control strategy is formulated to realize variable and asymmetric damping of an MR damper. modified "on-off" law devised using inverse model a MR-damper incorporating hysteretic properties. An current thus generating algorithm further developed integrated within the controller properties in continuous manner from symmetric damper design. The performance characteristics proposed force-tracking are evaluated study ride vibration attenuation quarter-vehicle...

Electronic portal imaging detector (EPID)-based patient positioning verification is an important component of safe radiotherapy treatment delivery. In computer simulation studies, learning-based approaches have proven to be superior conventional gamma analysis in the detection errors. To approximate a clinical scenario, detectability errors via EPID measurements was assessed using radiomics for patients with thyroid-associated ophthalmopathy. Treatment plans 40 ophthalmopathy were delivered...

Purpose: In radiotherapy, geometric indices are often used to evaluate the accuracy of contouring. However, ability identify error contouring results is limited primarily because they do not consider clinical background. The purpose this study investigate relationship between and dosimetric indices. Methods: Four different types targets were selected (C-shaped target, oropharyngeal cancer, metastatic spine prostate cancer), translation, scaling, rotation, sine function transformation...