A5075868149- Radiation Dose and Imaging
- Advanced X-ray and CT Imaging
- Advanced Radiotherapy Techniques
- Digital Radiography and Breast Imaging
- Radiation Therapy and Dosimetry
- Radiation Shielding Materials Analysis
- Effects of Radiation Exposure
- Medical Imaging Techniques and Applications
- AI in cancer detection
- Infrared Thermography in Medicine
- Optical Imaging and Spectroscopy Techniques
- Lung Cancer Diagnosis and Treatment
- Graphite, nuclear technology, radiation studies
- Radioactivity and Radon Measurements
- Radiomics and Machine Learning in Medical Imaging
- Photoacoustic and Ultrasonic Imaging
- Body Composition Measurement Techniques
- Medical and Biological Ozone Research
- Electrical and Bioimpedance Tomography
- Cardiac Imaging and Diagnostics
- Radiopharmaceutical Chemistry and Applications
- DNA Repair Mechanisms
- Cell death mechanisms and regulation
- Carcinogens and Genotoxicity Assessment
- Impact of Light on Environment and Health
Tabriz University of Medical Sciences
2016-2025
University of Tabriz
2024
Kyushu University
2001-2005
The reason why RBE for cell killing fell to less than unity (1.0) with very high-LET heavy-ions (40Ar: 1,640 keV/μm; 56Fe: 780, 1,200, 2,000 keV/μm) was explored by evaluating the fraction of non-hit (time-lapse observation) and cells undergoing interphase death (calculation based on our previous data). CHO were exposed 4 Gy (30% survival dose) Ar (1,640 or Fe-ions (2,000 keV/μm). About 20% all judged be non-hit, about 10% survived radiation damage. 70% died after dividing at least once...
This study was aimed at evaluating the mean glandular dose (MGD) and affecting factors during mammography examinations by a full-field digital unit. An extensive quality control program performed to assure that unit is properly working. Required information including compressed breast thickness (CBT), parenchymal pattern technical used for imaging were recorded. entrance skin exposure measurement also using slabs of polymethylmethacrylate with 2–8 cm thickness. On basis recorded measured...
Induction of interphase death was examined in Chinese hamster ovary cells exposed to accelerated heavy ions (carbon, neon, argon and iron) various linear energy transfers (LETs) (10-2000 keV/microm). The fraction that underwent determined by observing individual with time-lapse photography (direct method) as well counting undergoing made visible the addition caffeine (indirect method). After exposure X rays, increased linearly dose above a threshold about 10 Gy, whereas it at higher rate...
Background: The main problem with coronary computed tomography angiography (CCTA) scan is the extreme exposure of patients during imaging. Bismuth belt shield a new design to minimize received dose in CCTA. Objectives: purpose this study was and construct bismuth-silicon composite shields reduce risk ionizing radiation CCTA, along an examination diagnostic capability image for physician. Materials Methods: Dose reduction calculated by placing thermoluminescent dosimeters (TLDs) skin...
The purpose of this investigation was to measure the patient and staff dose during routine interventional cardiology procedures for an image intensifier-based a flat detector system using water phantom. Integris BH3000 (Philips) Axiom Artis detector-based (Siemens) angiography units were used in study. accuracy tubes potential irradiation timers also internal dosimeters verified confirmed. A phantom with thickness 18 cm measurements. For Philips system, entrance rates 2.77 38.97 microGym(2)...
The article aims at constructing protective composite shields for breasts in chest computed tomography and investigating the effects of applying these new bismuth composites on dose image quality. Polyurethane silicon with 5% were fabricated as a shield. At first, their efficiency attenuating X-ray beam was investigated by calculating total attenuation coefficients diagnostic energy range. Then, physical phantom scanned without tube voltage 120 kVp, parameters together values studied....
Background: Mammographic density determined according paranchymal patterns is a risk factor for breast cancer and its relationships with body other characteristics of women important. The purpose the present study was to correlate parenchymal mammography abnormality findings women's BMI, compressed thickness (CBT) age in Tabriz city, Iran. Materials Methods: From 1,100 mammograms interpreted by radiologists, classified into four categories from Types 1 (mostly fatty) through 4 fibroglandular...
The biological effects of ionizing radiation (BEIR VII) report estimates that the risk getting cancer from is increased by about a third current regulation levels. propose this study was to estimate induction abdominopelvic computed tomography (CT) scanning adult patients using 6- and 16-slice CT scanners.A cross-sectional on 200 with scan in scanners conducted. dose-length product (DLP) volume Dose Index (CTDIvol) values as well effective dose ImPACT patient dosimetry calculator method were...
Background: Application of nanomaterial has recently been introduced as a novel method to make radiation shield protect biological damage. Objectives: The purpose this study was evaluate the effectiveness regarding use nano-shield on protection breast in chest computed tomography (CT) scan. Materials and Methods: Bismuth oxide nanoparticles were prepared synthesized Chemistry Laboratory University Tabriz. Special tests used properties nanoparticles. Then, nano-bismuth shields designed with...
Objective (s): Recently, the use of nanoparticles in medicine has increased for radiation protection purpose. So aim this study was application nano Bi2O3 prepared shield dose reduction during medical imaging.Materials and Methods: Nano with 90% silicon 10% dosimetry test down radiology by PTW DIADOS E dosimeter.Results: The mean without using shields were 421 µGy, 733 µGy 1110 60, 80 100 kVp , respectively. After 0.5 mm thickness 42%, 35% 31%. A comparison between increasing energy from 60...
Determination of Rn- 222 concentration and annual effective dose inhalation in the vicinity hot springs Kerman province, southeastern Iran
Introduction: Near-infrared (NIR) optical imaging is a non-ionizing modality that emerging as diagnostic/prognostic tool for breast cancer according to NIR differentiation of hemoglobin (Hb) concentration. Methods: The transmission values LED-sourced light at 625 nm were measured by power meter evaluate the properties Hb in phantom containing major and minor vessels. For simulation blood variations cancerous condition, we prepared 2 concentrations pre-menopausal 4 post-menopausal and,...
Bismuth shield has been recently introduced for radiation protection of patient radiosensitive organs such as breast during chest CT with image diagnosis capability. The purpose this study was to evaluate the dose reduction and quality conserve using new bismuth-silicon composite shields CT. Scans were performed on a PMMA phantom 6-slice MDCT system. Dose calculated by placing ion-chamber in 12 o’clock position measuring. Chest scans without bismuth 10% 0.5 mm 1 thicknesses. Image assessed...
Nowadays, there has been a growing demand for low-dose computed tomography (LDCT) protocols. CT critical role in the management of diagnosis chain pulmonary disease, especially lung cancer screening. There have introduced several dose reduction methods, however, most them are time-consuming, intricate, and vendor-based strategies that hardly used clinics routinely. This study aims to evaluate image quality nodule detectability LDCT protocols feasible easy implemented. Image was analyzed...