An eco-friendly and clean GO–biopolymer heterogeneous nanocatalyst was prepared characterized, which efficiently promoted an important organic reaction.

A sulfonated magnetic cellulose‐based nanocomposite was prepared and characterized using scanning electron microscopy, energy‐dispersive X‐ray spectroscopy, diffraction Fourier transform infrared spectroscopy. Then, it used as a green nanocatalyst for the synthesis of α‐aminonitriles by one‐pot three‐component condensation reaction aldehydes or ketones, amines trimethylsilylcyanide in ethanol at room temperature. The procedure is simple, yields are very high, time short catalyst can be...

A new cellulose-based nanocomposite was synthesized, characterization and used for the synthesis of imidazoles α-aminonitriles, antibacterial property investigated.

PurposeTo establish the early prediction models of radiation-induced oral mucositis (RIOM) based on baseline CT-based radiomic features (RFs), dosimetric data, and clinical by machine learning for head neck cancer (HNC) patients.MethodsIn this single-center prospective study, 49 HNCs treated with curative intensity modulated radiotherapy (IMRT) were enrolled. Baseline CT images (i.e., simulation), dosimetric, collected. RIOM was assessed using CTCAE v.5.0. RFs extracted from...

The biomedical applications of gold nanoparticles (AuNPs) have experienced rapid growth in recent years, due to their expected benefits medical imaging and therapy. In this work, we report the development a theranostic nanocomplex constructed from alginate hydrogel co-loaded with cisplatin AuNPs (abbreviated as ACA) for simultaneous drug delivery computed tomography imaging. CT26 cells derived mouse colon adenocarcinoma were exposed various concentrations ACA (for 24 h) cytotoxicity was...

Purpose: Digital holographic microscopy, being a label-free and entirely non-invasive technique, proficiently facilitates the quantitative assessment of morphological alterations in living cells. The primary objective this investigation is to scrutinize capability digital microscope assessing transformations cancer cells exposed X-ray radiation. Materials Methods: Michigan Cancer Foundation-7 (MCF7) cell line underwent exposure radiation, administered singular fraction at dose 2 Gy....

BACKGROUND: Training and awareness regarding radiation protection is crucial for medical staff operating room personnel to prevent potential hazards from exposure. Various methods are employed increase the of principles. This study aimed evaluate effectiveness two training methods, multimedia presentations instructional booklets, in enhancing toward MATERIALS AND METHODS: In this semi-experimental study, 60 anesthesia technologists, were purposefully selected randomly (utilizing an...

The purpose of this study was to set four NTCP models on clinical data and develop a model that calculates the possibility hearing damage due irradiation healthy at-risk brainstem tissue.

Abstract Background: This study aimed to evaluate the effectiveness of clinical, dosimetric, and radiomic features from computed tomography (CT) scans in predicting probability heart failure breast cancer patients undergoing chemoradiation treatment. Materials Methods: We selected 54 who received left-sided therapy had a low risk natural according Framingham score. compared echocardiographic patterns ejection fraction (EF) measurements before 3 years after radiotherapy for each patient....

Purpose Evaluation of the organ dose in pediatric patients up to 15 years old and Estimation lifetime attributable risk (LAR) cancer incidence computed tomography procedures.Materials methods Data from 532 below was collected they were categorized into four age groups <1, 1–5, 5–10, 10–15 old. NCICT software used calculate dose, LAR has been estimated according BEIR VII report.Results The highest median all related eye lens (head scan), thyroid (chest colon (abdomen-pelvic scan). average...

Iodine-131 (I-131) therapy is one of the conventional approaches in treatment patients with differentiated thyroid carcinoma (DTC). The radioiodine agents also accumulate other organs that cause pain and damage to patients. Radioiodine associated various gastrointestinal (GI) toxicities. In this study, GI side effects were investigated. toxicities studied 137 histologically proven DTC Jun-Nov 2014. All treated by research institute Shariati Hospital, Tehran, Iran. examined 48 h after...

Abstract Purpose: Organ, effective dose, and Lifetime Attributable Risk (LAR) of breast cancer incidence related to lung Computed Tomography (CT) scans were evaluated. Seven hundred thirty-five female patients (20-50 years old) with Coronavirus (COVID-19) in four medical imaging centers Tehran, Iran, surveyed. Patients’ data, including age, sex, exposure information (Kilovoltage (KVp), milliampere-second (mAs), pitch factor, Dose Index (CTDIvol), Length Product (DLP)) extracted from dose...

In recent years, with the introduction of 64-slice CT and dual-source technology, coronary angiography (CCTA) has emerged as a useful diagnostic imaging modality non-invasive assessment heart disease. produces larger radiation dose than other tests cardiac involves higher advances in spatial temporal resolution. The aims this study are patient establishment national reference level for CCTA Iran. A questionnaire was sent to centers. Data protocols were obtained. volumetric index (CTDIvol),...

Abstract The lung is a radiation-sensitive organ. When cells are damaged due to accidental radiation exposure or treatment, they release molecules that lead the recruitment of immune cells, resulting in accumulation inflammatory cytokines at site damage. Apigenin (Api) natural flavonoid known for its anti-inflammatory properties. In this study, we investigated radioprotective properties Api lung. Materials and methods : Thirty-six Wistar rats were randomly assigned nine groups: control,...

Introduction: The lung is a moderately radio-sensitive organ. When cells are damaged due to accidental radiation exposure or treatment, they release molecules that lead the recruitment of immune cells, accumulating inflammatory cytokines at site damage. Apigenin (Api) natural flavonoid known for its anti-inflammatory properties. In this study, we investigated radioprotective properties Api in lung. Methods: Thirty-six Wistar rats were randomly assigned nine groups: control, (Rad), CMC+Rad,...

Recently availability of large scale mammography databases enable researchers to evaluates advanced tumor detections applying deep convolution networks (DCN) images which is one the common used imaging modalities for early breast cancer. With recent advance learning, performance detection has been developed by agreat extent, especially using R-CNNs or Region neural networks.This study a simple faster R-CNN detector lesion MIAS databases.

Background: The present study aimed to investgate patent dose in common X-ray examinatons estmate effectve the digital radiography Iran. Materials and Methods: Entrance surface (ESD) was measured based on applied exposure parameters for actual examinaton; then (ED) calculated by use of PCXMC software. conducted 15358 patents 85 rooms; necessary data collected five age groups, 0-1 year, 1-5 years, 5-10 10-15 years old adults each projecton. Results: ranges ESD ED different all groups are...

Abstract The main purpose of this pilot study was to assess the regional diagnostic reference level (RDRL) computed tomography (CT) examinations optimise medical exposure in five pediatric imaging centers Tehran, Iran where most frequent CT were investigated. For each patient, volume dose indexes (CTDIvol) and length product (DLP) group recorded their third quartile calculated set as RDRL. Pediatrics divided into four age groups (&amp;lt;1; 1–5; 5–10 10–15 years). Then, values for head,...

Cone beam computed tomography, CBCT, is a kind of CT scanner producing conical diverging X-rays, in which large area two-dimensional detector irradiated each rotation. Different investigations have been performed on dosimetry dental CBCT. As there no special protocol for scan protocols are used dosimetry. The purpose this study measurement dose to head and neck organs two CBCT systems, i.e. Planmeca 3D Mid (PM) NewTom VGi (NT), using thermoluminescence Rando phantom. thermoluminescent...

Abstract A new “quality-control-based (QC-based) dose survey method” has been developed for determination of diagnostic reference levels (DRL) in Computed Tomography (CT) examinations. The “QC-based is based on the use retrospective data QC documents and reports, which are typically available from National Regulatory Authority database. method was applied to 70 CT scanners Tehran, Iran, by using reports commonly used “data collection also filling each questionnaire on-site validate method....