Abstract
This article shows the results of an experimental investigation of the interference by paramagnetic and diamagnetic materials on imaging in a closed 1.5 Tesla high field magnetic resonance imaging system (MRI). For different types of sequences (SE, GE, EPI) the effects of metal and non-metal profiles in producing artefacts were investigated. A phantom (plastic think) filled with Gd-Mn-solution was used for representation of the artefacts. The materials analyzed were placed parallel to the phantom at predetermined distances. The images were obtained in transverse and sagittal planes and analyzed with respect to the resulting artefacts. The results show that aluminum and polymer profiles produce the weakest artefacts, even when the material is positioned close to the phantom. A comparison of the sequence types shows that the SE-sequence has a low sensitivity to artefacts, despite the great profile variation in size and shape. The SE-sequence accordingly showed a higher imaging stability as compared with the GE- and EPI-sequences. Steel and copper produced the strongest artefacts. The examination was begun after an intensive study of the literature (Internet, Medline, Meditec). So far have been few publications on this subject.
| Translated title of the contribution | Effects by paramagnetic and diamagnetic materials in a 1.5-Tesla highfield magnetic resonance imaging system (MRI) |
|---|---|
| Original language | German |
| Pages (from-to) | 281-286 |
| Number of pages | 6 |
| Journal | Biomedizinische Technik |
| Volume | 43 |
| Issue number | 10 |
| DOIs | |
| State | Published - Oct 1998 |
| Externally published | Yes |