نتایج جستجو برای: ultrasound image

تعداد نتایج: 478772  

Journal: :مجله دانشکده پزشکی دانشگاه علوم پزشکی تهران 0
معصومه گیتی ghitee m ندا نبی زاده nabi zadeh n مارینا تومانیان

the evaluate the diagnostic value of image guided fine needle aspiration (fna) in breast lesions, the cytologic results of 401 patients were studied. all patients had either unpalpable masses or lesions who were hardly possible to localize by palpation and fna was performed by single radiologist under ultrasound guide in all cases. the cytologic results were divided into four categories (inconc...

Journal: :iranian journal of medical physics 0
a. montaseri m.sc. in medical physics, medical physics dept., tarbiat modarres university, tehran, iran. m. mokhtari-dizaji associate professor, medical physics dept., tarbiat modarres university, tehran, iran. sh. akhlaghpour assistant professor, radiology dept., tehran university of medical sciences, tehran, iran. m. r. alinaghizadeh m.sc. of medical physics, noor medical imaging center, tehran.

introduction: one of the minimally invasive methods of treatmenting liver malignancies is radiofrequency ablation (rfa) which can be applied to primary or secondary tumors. nevertheless, the disease recurrence is probable after rfa application partially due to the inadequate capability of temperature monitoring of the target tissue and visualizing the thermal damage. the goal of this work was t...

Journal: :پژوهش های علوم و صنایع غذایی ایران 0
f. shahidi m. mohebbi m. noshad a. ehtiati m. fathi

banana is one of the most important tropical fruit from commercial and industrial point of view. this fruit is an extremely perishable fruit which can not be preserved using freezing process. therefore, drying is the most promising method. conventional air drying is energy intensive and consequently expensive method. pre-treatments can be used to reduce the initial water content or to modify th...

Medical ultrasound imaging due to close behavior of cancer tumors to body tissues has a low contrast. This problem with synthetic aperture imaging method has been addressed. Although the synthetic aperture imaging technique solved the low-contrast problem of ultrasound images, to an acceptable limit, but the performance of these methods is not even acceptable when the signal to noise ratio (SNR...

Journal: :journal of advances in computer research 2016
sedigheh ghofrani

ultrasound images suffer of multiplicative noise named speckle. different de-speckling algorithms run either in spatial domain or in transformed domain. in this paper, an adaptive filter in spatial domain according to assume the nakagami distribution as the statistic of log-compressed ultrasound images is used. for de-speckling in transformed domain, the non-sub sampled shearlet transform is us...

Ali Shakeri-Zadeh Alireza Mehdizade Maryam Rezaie Yazdi Narges Kheirollahi Parisa Pishdad

Interoduction: Ultrasound images have often low contrast due to small differences in acoustic impedance between different tissues. Air or gas microbubbles that surrounded by membrane are most of the contrast agents in ultrasound imaging. Problems such as instability in sound pressure and inability in penetrating from the blood vessel into body tissues limited the use of microbubbles into the in...

Alireza Vajhi, Hamid Sharifi Masoud Rajabioun Mohammad Molazem,

Objective: to compare the estimated thyroid volume, as determined by two-dimensional (2D) and three-dimensional (3D) ultrasonography, with real volume. Design: Descriptive Study Animals: A total of 7 mixed breed dogs Procedures: On 2D ultrasound, the thyroid volume is estimated by the ellipsoid equation and on 3D ultrasound; it is estimated by outlining the boundaries of the thyroid lobe in ...

Atusa Montaseri Manijeh Mokhtari Dizaji Zeinab alsadat Ahmadi

Introduction: Diagnosis of primary and secondary cancers to treat patients with diffuse and malignant tumors is an important subject. The appropriate treatment will be eliminating primary and metastatic tumors. Radiofrequency ablation with localized heat induction in the target tissue causes irreversible cellular damage and tissue coagulation. Estimation of tissue temperature c...

2017
Kuan Luan Jinglong Liu Jin Li

Freehand three-dimensional ultrasound system allows intra-operative imaging of pathologic tissue for image-guided injection. Accurate registration of ultrasound image for injection navigation requires calibration that is timeconsuming and tedious. We present an efficient calibration system based on a clinical injector. The injector equipped with an optical tracking sensor is moved in the vicini...

Journal: Poultry Science Journal 2019
Fajri DN Ulum MF,

Hen’s native chicken reproductive organ health status evaluation is important for raising Indonesian native chicken in order to support protein supply for people demand. This study aimed to discover the images of Indonesian hen’s native chicken reproductive organ using ultrasonography. There were 18 hens that used in this study and divided into two groups, 15 hens for brightnessmode ultrasonogr...

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