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RISS 인기검색어
- 검색키워드
- 저자 : Alikhassi, Afsaneh (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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Alikhassi, Afsaneh,Saeed, Farzanefar,Abbasi, Mehrshad,Omranipour, Ramesh,Mahmoodzadeh, Habibollah,Najafi, Massoome,Gity, Masoumeh,Kheradmand, Ali Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.7
Background: This study was designed to compare radioguided versus routine wire localization of nonpalpable non-malignant breast lesions in terms of efficacy for complete excision, ease of use, time saving, and cosmetic outcome. Materials and Methods: Patients with non-palpable breast masses and non-malignant core biopsy results who were candidates for complete surgical lumpectomy were enrolled and randomly assigned to radioguided or wire localization groups. Radiologic, surgical, and pathologic data were collected and analyzed to determine the difficulty and duration of each procedure, ease of use, accuracy, and cosmetic outcomes. Results: This prospective randomized study included 60 patients, randomly divided into wire guided localization (WGL) or radioguided occult lesion localization (ROLL) groups. The mean duration of localization under ultrasound guidance was shorter in the ROLL group (14.4 min) than in the WGL group (16.5 min) (p<0.001). The ROLL method was significantly easier for radiologists (p=0.0001). The mean duration of the surgical procedure was 22.6 min (${\pm}10.3min$) for ROLL and 23.6 min (${\pm}9.6min$) for WGL (p=0.6), a non-significant difference. Radiography of the surgical specimens showed 100% lesion excision with clear margins, as proved by pathologic examination, with both techniques. The surgical specimens were slightly heavier in the ROLL group, but the difference was not significant (p=0.06). Conclusions: The ROLL technique provides effective, fast, and simple localization and excision of non-palpable non-malignant breast lesions.
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A Novel Approach for Energy Harvesting from Feedback Fluidic Oscillator
Masoud Alikhassi,Mahdi Nili-Ahmadabadi,Reza Tikani,Mohammad Hassan Karimi 한국정밀공학회 2019 International Journal of Precision Engineering and Vol.6 No.4
Piezoelectric patches are widely used on a micro scale energy harvesting due to their simplicity and high flexibility. In this study a fluidic oscillator was used to effectively convert the kinetic energy of a fluid into the strain energy of the piezoelectric structure. The relationship between the input velocity and the frequency of fluid fluctuations in the fluidic oscillator was obtained and different positions for the piezoelectric beam and the effect of the input velocity on the output voltage was examined. The optimum electrical resistance was finally calculated for the maximum harvested power and the pressure drop caused by the fluidic oscillator and piezoelectric beam was investigated. The results indicated when the free end of the beam was inside the main chamber of oscillator, the beam fluctuates with its natural frequency so that the fluid oscillations frequency is close to the natural frequency at different velocity. However, when the free end of the beam was outside the main chamber, the voltage and power were maximized at the frequency of fluid oscillation equal to the natural frequency of the piezoelectric beam.
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Imperfect Correlation of Mammographic and Clinical Breast Tissue Density
Alipour, Sadaf,Bayani, Leila,Saberi, Azin,Alikhassi, Afsaneh,Hosseini, Ladan,Eslami, Bita Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.6
Background: Clinicians determine degree of mammographic density based on tissue firmness on breast examination. The study aimed to compare breast density in mammography and clinical breast examination. Materials and Methods: Six-hundred sixty three women 40 years of age or older were studied. The breast exam density was graded from 1 to 4 by two expert surgeons and the mammographic parenchymal density by two expert radiologists. Then for practical reasons, grades 1 and 2 were considered as low-density and grades 3 and 4 as high-density. Results: High and low densities were detected in 84.5% and 15.5% of clinical breast examinations and 59.7% and 40.3% of mammographies, respectively. The statistical analysis showed a significant difference between the breast tissue densities in breast examination with those in mammography. Conclusions: A clinically dense breast does not necessarily imply a dense mammographic picture.
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