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249 results on '"Kamal, Rasha"'

3. Reproductive factors and mammographic density within the International Consortium of Mammographic Density: A cross-sectional study

Author

O’Driscoll, Jessica, Burton, Anya, Maskarinec, Gertraud, Perez-Gomez, Beatriz, Vachon, Celine, Miao, Hui, Lajous, Martín, López-Ridaura, Ruy, Eliassen, A. Heather, Pereira, Ana, Garmendia, Maria Luisa, Tamimi, Rulla M., Bertrand, Kimberly, Kwong, Ava, Ursin, Giske, Lee, Eunjung, Qureshi, Samera A., Ma, Huiyan, Vinnicombe, Sarah, Moss, Sue, Allen, Steve, Ndumia, Rose, Vinayak, Sudhir, Teo, Soo-Hwang, Mariapun, Shivaani, Fadzli, Farhana, Peplonska, Beata, Nagata, Chisato, Stone, Jennifer, Hopper, John L., Giles, Graham, Ozmen, Vahit, Aribal, Mustafa Erkin, Schüz, Joachim, Van Gils, Carla H., Wanders, Johanna O. P., Sirous, Reza, Sirous, Mehri, Hipwell, John, Kim, Jisun, Lee, Jong Won, Hartman, Mikael, Li, Jingmei, Scott, Christopher, Chiarelli, Anna M., Linton, Linda, Pollan, Marina, Flugelman, Anath Arzee, Salem, Dorria, Kamal, Rasha, Boyd, Norman, dos-Santos-Silva, Isabel, McCormack, Valerie, and Mullooly, Maeve

Published
2024
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7. Deformable registration with intensity correction for CESM monitoring response to Neoadjuvant Chemotherapy

Author

Jailin, Clément, De Carvalho, Pablo Milioni, Mohamed, Sara, Vancamberg, Laurence, Moustafa, Amr Farouk Ibrahim, Gomaa, Mohammed, Kamal, Rasha Mohammed, and Muller, Serge

Subjects
Physics - Medical Physics, Electrical Engineering and Systems Science - Signal Processing
Abstract

This paper proposes a robust longitudinal registration method for Contrast Enhanced Spectral Mammography in monitoring neoadjuvant chemotherapy. Because breast texture intensity changes with the treatment, a non-rigid registration procedure with local intensity compensations is developed. The approach allows registering the low energy images of the exams acquired before and after the chemotherapy. The measured motion is then applied to the corresponding recombined images. The difference of registered images, called residual, makes vanishing the breast texture that did not changed between the two exams. Consequently, this registered residual allows identifying local density and iodine changes, especially in the lesion area. The method is validated with a synthetic NAC case where ground truths are available. Then the procedure is applied to 51 patients with 208 CESM image pairs acquired before and after the chemotherapy treatment. The proposed registration converged in all 208 cases. The intensity-compensated registration approach is evaluated with different mathematical metrics and through the repositioning of clinical landmarks (RMSE: 5.9 mm) and outperforms state-of-the-art registration techniques.

Published
2023
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13. The association of age at menarche and adult height with mammographic density in the International Consortium of Mammographic Density

Author

Ward, Sarah V., Burton, Anya, Tamimi, Rulla M., Pereira, Ana, Garmendia, Maria Luisa, Pollan, Marina, Boyd, Norman, dos-Santos-Silva, Isabel, Maskarinec, Gertraud, Perez-Gomez, Beatriz, Vachon, Celine, Miao, Hui, Lajous, Martín, López-Ridaura, Ruy, Bertrand, Kimberly, Kwong, Ava, Ursin, Giske, Lee, Eunjung, Ma, Huiyan, Vinnicombe, Sarah, Moss, Sue, Allen, Steve, Ndumia, Rose, Vinayak, Sudhir, Teo, Soo-Hwang, Mariapun, Shivaani, Peplonska, Beata, Bukowska-Damska, Agnieszka, Nagata, Chisato, Hopper, John, Giles, Graham, Ozmen, Vahit, Aribal, Mustafa Erkin, Schüz, Joachim, Van Gils, Carla H., Wanders, Johanna O. P., Sirous, Reza, Sirous, Mehri, Hipwell, John, Kim, Jisun, Lee, Jong Won, Dickens, Caroline, Hartman, Mikael, Chia, Kee-Seng, Scott, Christopher, Chiarelli, Anna M., Linton, Linda, Flugelman, Anath Arzee, Salem, Dorria, Kamal, Rasha, McCormack, Valerie, and Stone, Jennifer

Published
2022
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19. Artificial intelligence as an initial reader for double reading in breast cancer screening: a prospective initial study of 32,822 mammograms of the Egyptian population.

Author

Mansour, Sahar, Sweed, Enas, Gomaa, Mohammed Mohammed Mohammed, Hussein, Samar Ahmed, Abdallah, Engy, Nada, Yassmin Mohamed, Kamal, Rasha, Mohamed, Ghada, Taha, Sherif Nasser, and Moustafa, Amr Farouk Ibrahim

Subjects
PREDICTIVE tests, READING, BIOPSY, RISK assessment, REFERENCE values, RECEIVER operating characteristic curves, DIAGNOSTIC imaging, DATA analysis, BREAST tumors, EARLY detection of cancer, ARTIFICIAL intelligence, RESEARCH evaluation, PROBABILITY theory, KRUSKAL-Wallis Test, DECISION making in clinical medicine, DESCRIPTIVE statistics, CHI-squared test, LONGITUDINAL method, WORKFLOW, MAMMOGRAMS, COMPUTERS in medicine, STATISTICS, DIGITAL image processing, DATA analysis software, SENSITIVITY & specificity (Statistics), PATIENT aftercare
Abstract

Background: Although artificial intelligence (AI) has potential in the field of screening of breast cancer, there are still issues. It is vital to make sure AI does not overlook cancer or cause needless recalls. The aim of this work was to investigate the effectiveness of indulging AI in combination with one radiologist in the routine double reading of mammography for breast cancer screening. The study prospectively analyzed 32,822 screening mammograms. Reading was performed in a blind-paired style by (i) two radiologists and (ii) one radiologist paired with AI. A heatmap and abnormality scoring percentage were provided by AI for abnormalities detected on mammograms. Negative mammograms and benign-looking lesions that were not biopsied were confirmed by a 2-year follow-up. Results: Double reading by the radiologist and AI detected 1324 cancers (6.4%); on the other side, reading by two radiologists revealed 1293 cancers (6.2%) and presented a relative proportion of 1·02 (p < 0·0001). At the recall stage, suspicion and biopsy recommendation were more presented by the AI plus one radiologist combination than by the two radiologists. The interpretation of the mammogram by AI plus only one radiologist showed a sensitivity of 94.03%, a specificity of 99.75%, a positive predictive value of 96.571%, a negative predictive value of 99.567%, and an accuracy of 99.369% (from 99.252 to 99.472%). The positive likelihood ratio was 387.260, negative likelihood ratio was 0.060, and AUC "area under the curve" was 0.969 (0.967–0.971). Conclusions: AI could be used as an initial reader for the evaluation of screening mammography in routine workflow. Implementation of AI enhanced the opportunity to reduce false negative cases and supported the decision to recall or biopsy. [ABSTRACT FROM AUTHOR]

Published
2024
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21. Preparation and potential of chitosan-based/Al2O3 green hydrogel composites for the removal of methyl red dye from simulated solution.

Author

Ahmed, Ebtehal Mosaad, Feteha, Amr, Kamal, Rasha S., Behalo, Mohamed S., and Abdel-Raouf, Manar E.

Subjects
ESCHERICHIA coli, ALUMINUM oxide, CRYSTAL structure, X-ray diffraction, ADSORPTION capacity, GENTIAN violet, CARBOXYMETHYL compounds
Abstract

Different dyes are discharged into water streams, causing significant pollution to the entire ecosystem. The present work deals with the removal of acid red 2 dye (methyl red—as an anionic dye) by green sorbents based on chitosan derivatization. In this regard, two classes of chitosan derivatives—a total of six—were prepared by gamma irradiation at 30 kGy. The first group (group A) constitutes a crosslinked chitosan/polyacrylamide/aluminum oxide with different feed ratios, while the second group, identified as group B, is composed of crosslinked carboxymethyl chitosan/polyacrylamide/aluminum oxide with different ratios. Glycerol was added to soften the resultant hydrogels. The products were characterized by different tools, including FTIR for confirming the chemical modification, TGA for investigating their thermal properties, and XRD for verifying their crystalline structure. The morphology of the prepared derivatives was studied through SEM, while their topography before and after dye adsorption was monitored via the AFM. The removal efficiencies of the prepared sorbents were verified at different operation conditions, such as pH, temperature, adsorbent dose, initial concentration of dye solutions, and contact time. The data revealed that the optimum conditions for maximum dye uptake were as follows: pH 4, contact time 120 min, 0.1-g sorbent dose, and 50-ppm dye concentration. Additionally, the prepared sorbents demonstrated potent adsorption capacity and removal efficiency. It was found that the elements of the second group displayed higher performance than their counterparts. The data showed also that the adsorption process best fits with the Freundlich model and obeyed pseudo-first-order kinetic isotherm. In addition, the synthesized composites showed observable antibacterial potency toward E. coli as a Gram-negative bacterium and S. aureus as a Gram-positive bacterium. [ABSTRACT FROM AUTHOR]

Published
2024
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34. Influence of Some Terpolymers on Flow Characteristics of Mineral Base Oil: Experimental and Quantum Calculations.

Author

El-shazly, Reham I., Kamal, Rasha S., Ahmed, Nehal S., Nassar, Amal M., Khamis, Eman A., and Sayed, Galal H.

Subjects
*MINERAL oils, *BASE oils, *MALEIC anhydride, *ACRYLATES, *FOURIER transform infrared spectroscopy, *THERMOGRAVIMETRY, *POLYMERS, *DECANOL, *ACRYLIC acid
Abstract

Mineral oil undergoes several chemical and physical changes with temperature change and time of storage. The lubricating additives are widely applied to the engine lubrication to suppress undesirable base oil properties like pour point depressants and viscosity index (VI) improvers. The current study aimed to prepare lube oil additives by preparing terpolymers as follows: reacting acrylic acid with various linear alcohols (decanol, dodecanol, and hexadecanol), several alkyl acrylates can be produced. Different imides were produced as a result of the reaction of maleic anhydride with different amines (aniline, triethylenetetramine, and tetraethylenepentamine). Fourier transforms infrared spectroscopy (FTIR) was utilized for investigating the structures of prepared compounds. Various terpolymers were synthesized during the polymerization reaction of different imides, different alkyl acrylates, and octene. The molecular weights of all polymers were detected through the use of gel permeation chromatography (GPC). Thermal gravimetric analysis (TGA) was used to determine the thermal stability of the prepared terpolymers, and the results demonstrated that the prepared terpolymers had high heat resistance. Above 300°C, the polymers deteriorated. Shear-thinning is observed in the rheological behavior, which approaches perfect Newtonian behavior at a high shear rate. The terpolymers created lowered the pour point of oil to -24 in the case of polymer C2 and viscosity index is increased to 140 in the case of polymer C3. Quantum calculations prove that compound C3 has more atom capacity to receive electrons compared to A3, which allows the formation of hydrogen bonds with other monomers making the resultant polymer bulkier and hence giving oil higher viscosity index. [ABSTRACT FROM AUTHOR]

Published
2024

39. International Consortium on Mammographic Density: Methodology and population diversity captured across 22 countries

Author

McCormack, Valerie A., Burton, Anya, dos-Santos-Silva, Isabel, Hipwell, John H., Dickens, Caroline, Salem, Dorria, Kamal, Rasha, Hartman, Mikael, Lee, Charmaine Pei Ling, Chia, Kee-Seng, Ozmen, Vahit, Aribal, Mustafa Erkin, Flugelman, Anath Arzee, Lajous, Martín, Lopez-Riduara, Ruy, Rice, Megan, Romieu, Isabelle, Ursin, Giske, Qureshi, Samera, Ma, Huiyan, Lee, Eunjung, van Gils, Carla H., Wanders, Johanna O.P., Vinayak, Sudhir, Ndumia, Rose, Allen, Steve, Vinnicombe, Sarah, Moss, Sue, Won Lee, Jong, Kim, Jisun, Pereira, Ana, Garmendia, Maria Luisa, Sirous, Reza, Sirous, Mehri, Peplonska, Beata, Bukowska, Agnieszka, Tamimi, Rulla M., Bertrand, Kimberly, Nagata, Chisato, Kwong, Ava, Vachon, Celine, Scott, Christopher, Perez-Gomez, Beatriz, Pollan, Marina, Maskarinec, Gertraud, Giles, Graham, Hopper, John, Stone, Jennifer, Rajaram, Nadia, Teo, Soo-Hwang, Mariapun, Shivaani, Yaffe, Martin J., Schüz, Joachim, Chiarelli, Anna M., Linton, Linda, and Boyd, Norman F.

Published
2016
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48. Additional file 1 of The association of age at menarche and adult height with mammographic density in the International Consortium of Mammographic Density

Author

Ward, Sarah V., Burton, Anya, Tamimi, Rulla M., Pereira, Ana, Garmendia, Maria Luisa, Pollan, Marina, Boyd, Norman, dos-Santos-Silva, Isabel, Maskarinec, Gertraud, Perez-Gomez, Beatriz, Vachon, Celine, Miao, Hui, Lajous, Martín, López-Ridaura, Ruy, Bertrand, Kimberly, Kwong, Ava, Ursin, Giske, Lee, Eunjung, Ma, Huiyan, Vinnicombe, Sarah, Moss, Sue, Allen, Steve, Ndumia, Rose, Vinayak, Sudhir, Teo, Soo-Hwang, Mariapun, Shivaani, Peplonska, Beata, Bukowska-Damska, Agnieszka, Nagata, Chisato, Hopper, John, Giles, Graham, Ozmen, Vahit, Aribal, Mustafa Erkin, Schüz, Joachim, Van Gils, Carla H., Wanders, Johanna O. P., Sirous, Reza, Sirous, Mehri, Hipwell, John, Kim, Jisun, Lee, Jong Won, Dickens, Caroline, Hartman, Mikael, Chia, Kee-Seng, Scott, Christopher, Chiarelli, Anna M., Linton, Linda, Flugelman, Anath Arzee, Salem, Dorria, Kamal, Rasha, McCormack, Valerie, and Stone, Jennifer

Abstract

Additional file 1. Tables S1 and S2: Supplementary data providing results from sensitivity analyses of pooled models adjusted for a population-specific weight-for-height index instead of BMI

Published
2022
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