Explanipedia

Comparison of X-Ray Attenuation Performance, Antimicrobial Properties, and Cytotoxicity of Silicone- Based Matrices Containing Bi2O3, PbO, or Bi2O3/PbO Nanoparticles Open

Baharak Divband, Zahraa Haleem Al‐qaim, Falah H. Hussein, Davood Khezerloo, Nahideh Gharehaghaji · 2024

The best X-ray attenuation performance is attributed to the silicone-based matrix with nano Bi₂O₃; however, the flexible shield with Bi₂O₃/PbO nanoparticles can be cost-effective and cytocompatib…

PEGylated Magnetite/Hydroxyapatite: A Green Nanocomposite for T2-Weighted MRI and Curcumin Carrying Open

Nahideh Gharehaghaji, Baharak Divband · 2022

Background. The design of new magnetic resonance imaging (MRI) contrast media with chemotherapy drug-carrying capacity has an important role in diagnostic and therapeutic purposes. This study aimed to synthesize a polyethylene glycol (PEG)…

Hippocampus segmentation in magnetic resonance images of Alzheimer's patients using Deep machine learning Open

Hadi Varmazyar, Hossein Yousefi-Banaem, Saber Malekzadeh, Nahideh Gharehaghaji · 2021

Background: Alzheimers disease is a progressive neurodegenerative disorder and the main cause of dementia in aging. Hippocampus is prone to changes in the early stages of Alzheimers disease. Detection and observation of the hippocampus cha…

High Transverse Relaxivity and Anticancer Agent Loading/Release Characteristics of Porous Calcium Phosphate Coated Iron Oxide Nanoparticles Open

Baharak Divband, Nahideh Gharehaghaji, Zahra Atashi · 2020

High relaxivity of MRI contrast agents leads to considerable contrast enhancement in the images and provides diagnostic accuracy. The purpose of the current study was to design a potential MRI contrast agent with a high relaxivity and inve…

Effect of Neodymium Doping on MRI Relaxivity of Gadolinium Oxide Nanoparticles Open

Nahideh Gharehaghaji · 2020

Doping of neodymium into the gadolinium oxide nanoparticles suppresses the r1 relaxivity and enhances the r2 relaxivity of the nanoparticles.

Bimodal magnetic resonance imaging-computed tomography nanoprobes: A Review Open

Fatemeh Bakhtiari-Asl, Baharak Divband, Asghar Mesbahi, Nahideh Gharehaghaji · 2020

Bimodal imaging combines two imaging modalities in order to benefit from their advantages and compensate the limitations of each modality. This technique could accurately detect diseases for diagnostic purposes. Nanoparticles simultaneousl…

Relevance between MRI longitudinal relaxation rate and gadolinium concentration in Gd3+/GO/alginate nanocomposite Open

Ensiyeh Shafaei, Baharak Divband, Nahideh Gharehaghaji · 2019

Objective(s): Relevance between magnetic resonance imaging (MRI) relaxation rate and concentration of magnetic nanoparticles determines the capability of a nanomaterial to provide MRI contrast. In the present study, alginate was conjugated…

Signal suppressions of grape syrup and grape syrup/lemon aqueous solutions in magnetic resonance cholangiopancreatography using heavily T2-weighted pulse sequence Open

Mahdi Asgari, Baharak Divband, Nahideh Gharehaghaji · 2019

Signal suppression of the gastrointestinal tract fluids in magnetic resonance cholangiopancreatography (MRCP) has been performed using various natural and chemical substances with the different MRCP pulse sequences. This study aimed to inv…

Biomedical applications of bismuth oxide based nanocomposite: computed tomography and anticancer drug loading Open

Mohsen Zeini, Baharak Divband, Davood Khezerloo, Nahideh Gharehaghaji · 2019

Today, computed tomography (CT) has a special place among medical imaging modalities. Conventional intravascular contrast agents of CT have a short blood half-life and make adverse reactions. To overcome the problems, recently, nanomateria…

A New Potential Contrast Agent for Magnetic Resonance Imaging: Iron Oxide-4A Nanocomposite Open

Loghman Zareei, Baharak Divband, Asghar Mesbahi, M. Khatamian, Anita Kiani , et al. · 2019

Background: Magnetic resonance imaging (MRI) contrast agents have an important role to differentiate healthy and diseased tissues. Access and design new contrast agents for the optimal use of MRI are necessary. This study aims to evaluate …

A Case Report of Secondary Infertility Due to Retained Surgical Gauze Open

Seyed Mostafa Ghavami, Nahideh Gharehaghaji, Fariba Azabdaftari · 2019

Background and Objectives: One of the rare side effects of abdominal and pelvic surgery is retained surgical instruments or dressings in the site of surgery. Secondary infertility due to retained foreign body in the pelvis is also one of t…

Dosimetry of Critical Organs in Maxillofacial Imaging with Cone-beam Computed Tomography Open

R Ghanbarnezhad Farshi, Asghar Mesbahi, Masume Johari, Ümit Kara, Nahideh Gharehaghaji · 2019

Background: While the benefits of cone-beam computed tomography (CBCT) are well known in maxillofacial imaging, the use of this modality is not risk-free.Objective: The aim of this study was to evaluate the exposure doses received by patie…

Image quality assessment of the digital radiography units in Tabriz, Iran: A phantom study Open

Nahideh Gharehaghaji, Davood Khezerloo, Tohid Abbasiazar · 2019

Creating a high-quality image with the low patient dose is one of the most important goals in medical X-ray imaging. In this study, the image quality parameters of the digital radiographic units in Tabriz city were considered and compared …

Microdosimetry: experimental methods and medical applications Open

Nahideh Gharehaghaji, Davood Khezerloo · 2018

Introduction: Microdosimetry is a fundamental method that studies the nature of transfer in micron volumes in the particular biological cells. In a biological target, the amount of ionization does not indicate the magnitude of biological …

A Case Report of Secondary Infertility Due to Retained Surgical Gauze Open

Seyed Mostafa Ghavami, Nahideh Gharehaghaji, Fariba Azabdaftari · 2018

Linde Type A and nano magnetite/NaA zeolites: cytotoxicity and doxorubicin loading efficiency Open

Baharak Divband, Mohammad‐Reza Rashidi, M. Khatamian, G. R. Kazemi Eslamian, Nahideh Gharehaghaji , et al. · 2018

Different cation-exchanged (K + , Na + & Ca 2+ ) nano-zeolites withi magnetite nanocomposites were synthesized and their suitability for drug loading was studied. Nanocomposites with different Fe 3 O 4 contents were synthesized by adding m…

A novel MRI contrast agent synthesized by ion exchange method Open

Nahideh Gharehaghaji, Baharak Divband · 2018

Objective: In this study, the zeolite-coated iron oxide nanoparticles were evaluated as MRI contrast agent and effect of the nanocomposite synthesis method on MRI contrast was tested. Materials and Methods: Ion exchange method was used for…

Dosimetric verification of small fields in the lung using lung-equivalent polymer gel and Monte Carlo simulation Open

Nahideh Gharehaghaji, H. Dadgar · 2018

Our study showed that the dose reduction with small fields in the lung was very high. Thus, inaccurate prediction of absorbed dose inside the lung and also lung/soft-tissue interfaces with small photon beams may lead to critical consequenc…

Brain Volume Estimation Enhancement by Morphological Image Processing Tools. Open

Reyhaneh Zeinali, A Keshtkar, Ali Zamani, Nahideh Gharehaghaji · 2017

Using morphological operation, dilation allows to enhance the estimation volume method, Stereology. In the case with less MRI slices and less test points, this method works much better compared to Stereology method.

Osteoid Osteoma in the Coccyx: A Case Report Open

Hojjat Hossein Pourfeizi, Mostafa Ghavami, Nahideh Gharehaghaji · 2017

Osteoid osteoma is a benign bone tumor that occurs most frequently in long bones such as femur and tibia. The spine is a rare localization of osteoid osteoma and the coccyx even more exceptional. We report a case of osteoid osteoma of the …

An overview on small-field dosimetry in photon beam radiotherapy: Developments and challenges Open

Hamed Bagheri, Azadeh Soleimani, Nahideh Gharehaghaji, Asghar Mesbahi, Farhad Manouchehri , et al. · 2017

Small fields are more repeatedly used for radiation therapy as small segments in intensity-modulated radiotherapy or as in the form of independent fields in stereotactic radiosurgery and other novel equipment such as cyberknife and tomothe…

FETAL GALLSTONES: A CASE REPORT Open

Ghavami Seyed Mostafa, Ramin Abedinzadeh, Nahideh Gharehaghaji · 2015

Fetal cholelithiasis is rare during pregnancy. Ultrasound examination in third trimester is the best diagnostic modality for detection of this condition. We report a case of 30- year old pregnant woman, at 36 weeks gestation, attending med…

Effect of Inversion Time on the Linear Correlation between Polyethylene Glycol Coated Iron Oxide Nanoparticles Concentration and Signal Intensity in Inversion Recovery MRI Pulse Sequence Open

Mahmood Nazarpoor, Nahideh Gharehaghaji, Hodaiseh Saharkhiz · 2015

Background and purpose: In MRI the concentration of contrast agent is indirectly measured from signal intensity (SI). It is important to find the maximum linear relationship between SI and concentration of the iron oxide nanoparticles for …

Effect of Flip Angle on the Correlation Between Signal Intensity and Different Concentrations of Iron Oxide Nanoparticles Using T1-Weighted Turbo-FLASH Inversion Recovery Sequence Open

Nahideh Gharehaghaji, Mahmood Nazarpoor, Hodaiseh Saharkhiz · 2015

The maximum SI will be increased at higher flip angles with non-linear relationship between SI and nanoparticle concentration. The result shows that an increase in the flip angle leads to a decrease in the range of the linearity. The optim…

Effect of iron oxide nanoparticles coating type on the relationship between nanoparticles concentration and signal intensity in inversion recovery T1-weighted MRI. Open

Nahideh Gharehaghaji, Mahmood Nazarpoor, Hodaiseh Saharkhiz · 2015

The maximum non-linear corrected SI of the carboxydextran-coated nanoparticles was slightly higher than that of the PEG-coated nanoparticles at similar TIs. However, the PEG-coated nanoparticles were better than the carboxydextran-coated n…

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