Detection of focal liver lesions in unenhanced and ferucarbotran-enhanced magnetic resonance imaging: a comparison of T2-weighted breath-hold and respiratory-triggered sequences
| Autor: | Moritz Wagner, Matthias Rief, Bernd Hamm, Christian Klessen, Tobias Franiel, Viola Bresan, Patrick Asbach, Matthias Taupitz |
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| Rok vydání: | 2008 |
| Předmět: |
Adult
Male medicine.medical_specialty Sarcoidosis Image quality media_common.quotation_subject Biomedical Engineering Biophysics Contrast Media Respiratory triggering medicine Image Processing Computer-Assisted Contrast (vision) Humans Radiology Nuclear Medicine and imaging Respiratory system Magnetite Nanoparticles media_common Liver imaging Aged medicine.diagnostic_test Lesion detection business.industry Liver Diseases Respiration Liver Neoplasms Magnetic resonance imaging Dextrans Middle Aged Magnetic Resonance Imaging Ferrosoferric Oxide Liver Female Radiology business Nuclear medicine T2 weighted |
| Zdroj: | Magnetic resonance imaging. 27(9) |
| ISSN: | 1873-5894 |
| Popis: | To investigate the image quality and detection rate of focal liver lesions by comparing a T2-weighted breath-hold single-shot sequence and a T2-weighted high spatial resolution fast spin-echo sequence with respiratory triggering via unenhanced and superparamagnetic iron oxide (SPIO)-enhanced liver imaging.The study was approved by the local ethical review board; informed consent was waived. Liver-lesion contrast was measured and a qualitative consensus evaluation of image quality and lesion detection was performed in 42 consecutive patients using a 1.5-T MR system.The liver-lesion contrast was significantly higher (P.05) for the respiratory-triggered sequence compared to the breath-hold sequence regarding unenhanced and SPIO-enhanced imaging. The respiratory-triggered sequences revealed significantly higher image quality scores as well as higher numbers of detected liver lesions compared to the breath-hold sequence on unenhanced and SPIO-enhanced imaging. The SPIO contrast did not significantly improve the number of detected lesions on the respective sequences (P.05).We find that respiratory-triggered fast spin-echo sequences produce a higher image quality and a more precise liver-lesion detection rate thereby justifying the increased acquisition time necessary for this method. |
| Databáze: | OpenAIRE |
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