CHARACTERIZATION OF NORMAL AND ABNORMAL CANINE SUPERFICIAL LYMPH NODES USING GRAY-SCALE B-MODE, COLOR FLOW MAPPING, POWER, AND SPECTRAL DOPPLER ULTRASONOGRAPHY: A MULTIVARIATE STUDY
| Autor: | Ib M. Skovgaard, Annemarie T. Kristensen, Helena T. Nyman, Fintan J. McEvoy |
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| Rok vydání: | 2005 |
| Předmět: |
Multivariate statistics
medicine.medical_specialty Diagnosis Differential symbols.namesake Dogs Predictive Value of Tests Animals Medicine Dog Diseases Ultrasonography Doppler Color Lymphatic Diseases Lymph node General Veterinary business.industry Ultrasound Echogenicity medicine.disease Lymphoma medicine.anatomical_structure Lymphatic Metastasis Predictive value of tests Multivariate Analysis symbols Lymph Nodes Radiology Lymph business Doppler effect |
| Zdroj: | Veterinary Radiology Ultrasound. 46:404-410 |
| ISSN: | 1740-8261 1058-8183 |
| DOI: | 10.1111/j.1740-8261.2005.00074.x |
| Popis: | The objective of this study was to characterize the ultrasonographic patterns of normal superficial lymph nodes and to evaluate whether ultrasonography can help discriminate between different lymphadenopathies (reactive, lymphoma, and metastases) in dogs. Three hundred and eighteen superficial lymph nodes in 142 dogs were studied by B-mode, color flow mapping, power, and spectral Doppler ultrasonography. Size, echogenicity, nodal border definition, presence of a nodal hilus, acoustic enhancement and distribution of vascular flow, as well as perfusion indices were measured. Multivariate statistics using discriminant analysis was used to determine which parameters can be used to predict the diagnosis of the lymph node. The size of the lymph node, distribution of vascular flow within the lymph node, and pulsatility index (PI) in combination gave a classification error of 23% for the four groups of lymph nodes. This was improved to 11% if the nodes were divided into two groups: benign and malignant. There was a significant difference in resistive index (RI) and PI between benign and malignant nodes. Cut-off values were determined using receiver operator curves, 0.68 RI and 1.49 PI. |
| Databáze: | OpenAIRE |
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