Comparison between high-field-strength MR imaging and CT for screening of hepatic metastases: a receiver operating characteristic analysis
| Autor: | W Wiesmann, P Vassallo, D Kivelitz, M. F. Reiser, B Reers, Sanjay Saini, J W Oestmann, Peters Pe, Ernst J. Rummeny, K Wernecke |
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| Rok vydání: | 1992 |
| Předmět: |
Male
medicine.medical_specialty Esophageal Neoplasms medicine Humans Radiology Nuclear Medicine and imaging High field strength Gastrointestinal Neoplasms medicine.diagnostic_test Receiver operating characteristic analysis business.industry Echo time Liver Neoplasms Preoperative screening Magnetic resonance imaging Middle Aged Magnetic Resonance Imaging Mr imaging Pancreatic Neoplasms ROC Curve Repetition Time Female Radiology Bolus (digestion) Tomography X-Ray Computed business Nuclear medicine |
| Zdroj: | Radiology. 182:879-886 |
| ISSN: | 1527-1315 0033-8419 |
| DOI: | 10.1148/radiology.182.3.1535912 |
| Popis: | The diagnostic performance of high-field-strength magnetic resonance (MR) imaging (1.5 T) for detection of liver metastases was compared with that of computed tomography (CT). All patients (n = 52) underwent preoperative screening for metastases by means of MR imaging with T1-weighted, proton-density-weighted, and T2-weighted pulse sequences and CT scanning with unenhanced, incremental dynamic bolus-enhanced, and delayed contrast medium-enhanced techniques. Diagnostic performance was evaluated by means of receiver operating characteristic analysis in which 800 images (400 with and 400 without lesions) and five readers (4,000 observations) were used; images were obtained from patients (n = 39) in whom the same anatomic levels were available for all MR imaging and CT studies. Direct comparison between the best MR imaging technique (T2-weighted spin-echo imaging [repetition time, 2,000 msec; echo time, 70 msec]) and the best CT technique (incremental dynamic bolus CT) showed a strong trend of superiority of T2-weighted MR imaging over incremental dynamic bolus CT. No highly statistically significant difference (P greater than or equal to .01), however, was found between these two techniques. |
| Databáze: | OpenAIRE |
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