Nasopharyngeal Carcinoma Tumor Volume Measurement1
| Autor: | Jing Huang, Tuan-Kay Lim, Vincent Chong, Jiayin Zhou, James B. K. Khoo |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
medicine.medical_specialty
medicine.diagnostic_test Interobserver reliability business.industry Significant difference Magnetic resonance imaging medicine.disease Nasopharyngeal carcinoma Volume measurement Medicine Radiology Nuclear Medicine and imaging Segmentation Radiology business Nuclear medicine |
| Zdroj: | Radiology. 231:914-921 |
| ISSN: | 1527-1315 0033-8419 |
| DOI: | 10.1148/radiol.2313030358 |
| Popis: | Tumor volume was measured in 69 patients with nasopharyngeal carcinoma. On transverse nonenhanced T1-weighted and gadolinium-enhanced T1-weighted magnetic resonance (MR) images, segmentation was performed by means of seed growing and knowledge-based fuzzy clustering methods. Data were compared with those collected with the manual tracing method and analyzed for interoperator variance and interobserver reliability. There was no significant difference between the volumes determined with manual tracing or semiautomated segmentation (P >.05). On the volume level, Pearson correction coefficients were close for both the manual tracing and semiautomated methods. Significant differences in interoperator variance existed between the two methods on the pixel level (P |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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