Diffusion-Weighted Echo-Planar MRI: A Valuable Tool for Differentiating Primary Parotid Gland Tumors?
| Autor: | P. Gossrau, Christian R. Habermann, Gerhard Adam, M. C. Cramer, M. Jaehne, C Arndt, Joachim Graessner, F. Reitmeier |
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| Rok vydání: | 2005 |
| Předmět: |
Adult
Male Adolescent Sensitivity and Specificity Diagnosis Differential Region of interest Statistical significance Image Interpretation Computer-Assisted medicine Humans Effective diffusion coefficient Radiology Nuclear Medicine and imaging Aged Echo-Planar Imaging business.industry Reproducibility of Results Middle Aged Image Enhancement medicine.disease Spinal cord Primary tumor Parotid Neoplasms Parotid gland Diffusion Magnetic Resonance Imaging medicine.anatomical_structure Feasibility Studies Female Nuclear medicine business Echo planar |
| Zdroj: | RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren. 177:940-945 |
| ISSN: | 1438-9010 1438-9029 |
| Popis: | PURPOSE To investigate the feasibility of using diffusion-weighted (DW) echo-planar imaging (EPI) for differentiating primary parotid gland tumors. MATERIAL AND METHODS Fifty consecutive patients with a suspected primary tumor of the parotid gland were examined with a DW EPI sequence (TR 1,500 msec, TE 77 msec, field of view 250 x 250 mm, pixel size 2.10 x 1.95 mm, section thickness 5 mm). The b factors used were 0, 500, and 1,000 sec/mm (2). Apparent diffusion coefficient (ADC) maps were digitally transferred to MRIcro (Chris Rorden, University of Nottingham, Great Britain) and evaluated with a manually placed irregular region of interest (ROI) containing the entire tumor. Additionally, the contralateral, non affected parotid gland was measured and a circular ROI containing 100 - 200 pixels was placed in the cerebrospinal fluid (CSF) next to the spinal cord in every patient. For comparison of the results, the two-tailed Student's t test was used, based on the median ADC values for each patient, and a p-value |
| Databáze: | OpenAIRE |
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