Thyroid Ultrasound: State of the Art. Part 2 - Focal Thyroid Lesions.
*Practice Guidelines as Topic; Computer Assisted – Methods; Computer-Assisted/*methods; Diagnosis; Differential; Evidence-Based; Evidence-Based Medicine; Humans; Image Enhancement – Methods; Image Enhancement/methods; Image Interpretation; Medical Practice; Practice Guidelines; Reproducibility of Results; Scales; Sensitivity and Specificity; Thyroid Gland; Thyroid Gland – Pathology; Thyroid Gland/*diagnostic imaging/pathology; Thyroid Nodule; Thyroid Nodule – Pathology; Thyroid Nodule/*diagnostic imaging/pathology; Ultrasonography – Methods; Ultrasonography – Standards; Ultrasonography/*methods/*standards
Accurate differentiation of focal thyroid nodules (FTL) and thyroid abnormalities is pivotal for proper diagnostic and therapeutic work-up. In these two part articles, the role of ultrasound techniques in the characterization of FTL and evaluation of diffuse thyroid diseases is described to expand on the recently published World Federation in Ultrasound and Medicine (WFUMB) thyroid elastography guidelines and review how this guideline fits into a complete thyroid ultrasound exam.
Dighe Manjiri; Barr Richard; Bojunga Jorg; Cantisani Vito; Chammas Maria Cristina; Cosgrove David; Cui Xin-Wu; Dong Yi; Fenner Franziska; Radzina Maija; Vinayak Sudhir; Xu Jun-Mei; Dietrich Christoph F
Medical ultrasonography
2017
2017-04
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
<a href="http://doi.org/10.11152/mu-999" target="_blank" rel="noreferrer noopener">10.11152/mu-999</a>
Focal Liver Lesions: Computer-aided Diagnosis by Using Contrast-enhanced US Cine Recordings.
Computer-Assisted/*methods; Contrast Media/*therapeutic use; Humans; Image Interpretation; Liver Neoplasms/*diagnostic imaging; Retrospective Studies; ROC Curve; Ultrasonography/*methods
Purpose To assess the performance of computer-aided diagnosis (CAD) systems and to determine the dominant ultrasonographic (US) features when classifying benign versus malignant focal liver lesions (FLLs) by using contrast material-enhanced US cine clips. Materials and Methods One hundred six US data sets in all subjects enrolled by three centers from a multicenter trial that included 54 malignant, 51 benign, and one indeterminate FLL were retrospectively analyzed. The 105 benign or malignant lesions were confirmed at histologic examination, contrast-enhanced computed tomography (CT), dynamic contrast-enhanced magnetic resonance (MR) imaging, and/or 6 or more months of clinical follow-up. Data sets included
Ta Casey N; Kono Yuko; Eghtedari Mohammad; Oh Young Taik; Robbin Michelle L; Barr Richard G; Kummel Andrew C; Mattrey Robert F
Radiology
2018
2018-03
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
<a href="http://doi.org/10.1148/radiol.2017170365" target="_blank" rel="noreferrer noopener">10.1148/radiol.2017170365</a>
Effects of precompression on elasticity imaging of the breast: development of a clinically useful semiquantitative method of precompression assessment.
Adult; Female; Humans; Middle Aged; Young Adult; Ultrasonography; Sensitivity and Specificity; Breast Neoplasms/*diagnostic imaging; Reproducibility of Results; Elasticity Imaging Techniques/*methods; *Algorithms; Artifacts; Image Enhancement/methods; Palpation/*methods; Image Interpretation; Mammary/*methods; Computer-Assisted/*methods
OBJECTIVES: Elastography of the breast is a new technique for characterization of breast lesions. The reproducibility of elastographic techniques has been questioned. Precompression is known to effect elastographic results. This study determined the effect of precompression on clinical images and proposes a method to semiquantify the amount of precompression applied. METHODS: Ten patients with different breast tissue types were evaluated with shear wave and strain elastography with varying amounts of precompression. The changes in the shear wave speed and images were documented. A semiquantitative method for determining the amount of precompression applied is presented. The reproducibility of the technique was determine by repeated measurements by 3 sonographers. RESULTS: Precompression substantially changes the elastographic results of patient images on both strain and shear wave elastography. Fat can have the same elasticity as cancer with clinically possible amounts of precompression. The proposed method for determining the amount of precompression applied has variability of less than 10%, which is within the error of the technique and would not affect clinical results. Four zones of precompression are identified, which are useful for explaining the effects of precompression on both strain and shear wave imaging. CONCLUSIONS: Precompression is a substantial factor in obtaining accurate results with elastography. A proposed simple, easily applied technique can be used to semiquantify the amount of precompression applied. Precompression should be minimized in obtaining breast clinical images.
Barr Richard G; Zhang Zheng
Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine
2012
2012-06
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
<a href="http://doi.org/10.7863/jum.2012.31.6.895" target="_blank" rel="noreferrer noopener">10.7863/jum.2012.31.6.895</a>