نتایج جستجو برای: elastography

تعداد نتایج: 5434  

2015
Hai-Yan He Mao Huang Jie Zhu Hang Ma Xue-Dong Lyu

BACKGROUND Pathophysiological processes, such as malignancy, can lead to the formation of stiffer tissue in lung cancers. Endobronchial ultrasound (EBUS) elastography is a novel technique for measuring tissue stiffness during EBUS-guided transbronchial needle aspiration (EBUS-TBNA). The current study was conducted to investigate the diagnostic value of EBUS elastography for mediastinal and hila...

2016
So Hyun Park So Yeon Kim Chong Hyun Suh Seung Soo Lee Kyoung Won Kim So Jung Lee Moon-Gyu Lee

According to the increasing need for accurate staging of hepatic fibrosis, the ultrasound (US) elastography techniques have evolved significantly over the past two decades. Currently, US elastography is increasingly used in clinical practice. Previously published studies have demonstrated the excellent diagnostic performance of US elastography for the detection and staging of liver fibrosis. Al...

2015
Vito Cantisani Hektor Grazhdani Elena Drakonaki Vito D'Andrea Mattia Di Segni Erton Kaleshi Fabrizio Calliada Carlo Catalano Adriano Redler Luca Brunese Francesco Maria Drudi Angela Fumarola Giovanni Carbotta Fabrizio Frattaroli Nicola Di Leo Mauro Ciccariello Marcello Caratozzolo Ferdinando D'Ambrosio

Thyroid nodules, with their high prevalence in the general population, represent a diagnostic challenge for clinicians. Ultrasound (US), although absolutely reliable in detecting thyroid nodules, is still not accurate enough to differentiate them into benign and malignant. A promising novel modality, US elastography, has been introduced in order to further increase US accuracy. The purpose of t...

Journal: :Colorectal disease : the official journal of the Association of Coloproctology of Great Britain and Ireland 2015
J E R Waage S P Bach F Pfeffer S Leh R F Havre S Ødegaard G Baatrup

AIM Strain elastography is a novel approach to rectal tumour evaluation. The primary aim of this study was to correlate elastography to pT stages of rectal tumours and to assess the ability of the method to differentiate rectal adenomas (pT0) from early rectal cancer (pT1-2). Secondary aims were to compare elastography with endorectal ultrasonography (ERUS) and to propose a combined strain elas...

Journal: :Optics letters 2016
Panomsak Meemon Jianing Yao Ying-Ju Chu Fernando Zvietcovich Kevin J Parker Jannick P Rolland

Elastography is a technique that measures and maps the local elastic property of biological tissues. Aiming for detection of micron-scale inclusions, various optical elastography, especially optical coherence elastography (OCE), techniques have been investigated over the past decade. The challenges of current optical elastography methods include the decrease in elastographic resolution as compa...

Journal: :Physics in medicine and biology 2007
Raffaella Righetti Seshadri Srinivasan Arun Thitai Kumar Jonathan Ophir Thomas A Krouskop

The quality of strain estimates in elastography is typically quantified by several quality factors such as the elastographic signal-to-noise ratio, the elastographic contrast-to-noise ratio and the spatial axial and lateral resolutions. While theoretical and simulation works have led to established upper bounds of these image quality factors in axial strain elastography, the performance limitat...

2015
Young Jun Choi Jeong Hyun Lee Jung Hwan Baek

Ultrasound (US) elastography has been introduced as a noninvasive imaging technique for evaluating cervical lymph nodes. US elastography techniques include strain elastography and shear wave-based elastography. The application of this technique is based on the fact that stiff tissues tend to deform less and show less strain than compliant tissues when the same force is applied. In general, meta...

Journal: :Ultrasound international open 2016
B Mahmood C Ewertsen J Carlsen M B Nielsen

Atherosclerosis is a widespread disease that accounts for nearly 3-quarters of deaths due to cardiovascular disease. Ultrasound elastography might be able to reliably identify characteristics associated with vulnerable plaques. There is a need for the evaluation of elastography and its ability to distinguish between vulnerable and stable plaques. The aim of this paper is to provide an overview ...

Journal: :Japanese journal of clinical oncology 2009
Tomoaki Miyagawa Masakazu Tsutsumi Takeshi Matsumura Natsui Kawazoe Satoru Ishikawa Tatsuro Shimokama Naoto Miyanaga Hideyuki Akaza

OBJECTIVE Elastography is a technique for detecting the stiffness of tissues. We applied elastography for the diagnosis of prostate cancer and evaluated the usefulness of elastography for prostate biopsy. METHODS The subjects of this study were 311 patients who underwent elastography during prostate needle biopsy at Hitachi General Hospital. Strain images obtained during compression of the pr...

2012
Gerard Pons Joan Martí Robert Marti Mariano Cabezas Andrew Di Battista J. Alison Noble

Breast ultrasound (BUS) imaging is an imaging modality used for the detection and diagnosis of breast lesions and it has become a crucial modality nowadays specially for providing a complementary view when other modalities (i.e. mammography) are not conclusive. However, lesion detection in ultrasound images is still a challenging problem due to the presence of artifacts such as low contrast, sp...

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