| Zugriffsnummer | 25375 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Simulations of Tx-SENSE performance of a 4 channel decoupled loop array for cardiac imaging at 7T [poster] |
| Autor(in); Institution |
Seifert, Frank; 8.1, Medizinische Messtechnik, PTB-Berlin; Berlin Ultrahigh Field Facility, Max-Delbrück-Center for Molecular, Berlin, GERMANY
Lindel, Tomasz D.; 8.1, Medizinische Messtechnik, PTB-Berlin; Berlin Ultrahigh Field Facility, Max-Delbrück-Center for Molecular, Berlin, GERMANY
Kühne, André; 8.1, Medizinische Messtechnik, PTB-Berlin; Berlin Ultrahigh Field Facility, Max-Delbrück-Center for Molecular, Berlin, GERMANY
Waiczies, Helmar; 8.1, Medizinische Messtechnik, PTB-Berlin; Berlin Ultrahigh Field Facility, Max-Delbrück-Center for Molecular, Berlin, GERMANY
Renz, W.; Berlin Ultrahigh Field Facility, Max-Delbrück-Center for Molecular, Berlin, GERMANY; Siemens Healthcare, Erlangen, GERMANY
Ittermann, Bernd; 8.1, Medizinische Messtechnik, PTB-Berlin; Berlin Ultrahigh Field Facility, Max-Delbrück-Center for Molecular, Berlin, GERMANY
|
| Quelle/Jahr | Proceedings International Society for Magnetic Resonance in Medicine: 18 (2010), 1 S. |
| Availability | [CD-ROM] ; file name: 3813_5506.pdf |
| ISSN | 1545-4428 |
| Konferenzangaben | ISMRM-ESMRMB Joint Annual Meeting ; ISMRM 18th Scientific Meeting, Stockholm, 01-07, May, 2010, Schweden |
| Zusammenfassung | Transmit (Tx)-SENSE performance depends crucially on the reliable knowledge of the B1(+)-maps of the transmit coil elements. To speed up the whole imaging procedure true B1(+)-mapping is often avoided by using the virtual reference approach. This virtual reference is constructed from the sum-ofsquare images of all transmit and receive channels and is assumed to be almost homogeneous. Unfortunately, at ultra-high fields this assumption is questionable, especially in body imaging. As a result, it may no longer be possible to achieve the desired excitation patterns. In order to estimate the experimental outcome of Tx-SENSE based zoomed cardiac imaging at 7T we performed FDTD simulations on a computer model of the human body. From simulated B1(+)-and B1(-)-maps of a home-built 4-channel TX/RX torso coil, the virtual-reference-based transmit sensitivity maps can easily be derived. This way, two complete simulations of a Tx-SENSE experiment can be compared: one based on the virtual reference approximation and one using the true B1(+)-maps. |
Zitierung
Seifert, F., Lindel, T. D., Kühne, A., Waiczies, H., Renz, W., & Ittermann, B. (2010). Simulations of Tx-SENSE performance of a 4 channel decoupled loop array for cardiac imaging at 7T [poster]. ISMRM-ESMRMB Joint Annual Meeting ; ISMRM 18th Scientific Meeting, Stockholm, 01-07, May, 2010, Schweden.