Fachbereich Elektrotechnik und Informationstechnik
Refine
Year of publication
Institute
- Fachbereich Elektrotechnik und Informationstechnik (1184)
- MASKOR Institut für Mobile Autonome Systeme und Kognitive Robotik (53)
- ECSM European Center for Sustainable Mobility (25)
- Fachbereich Maschinenbau und Mechatronik (6)
- Fachbereich Luft- und Raumfahrttechnik (4)
- Fachbereich Wirtschaftswissenschaften (4)
- Fachbereich Energietechnik (3)
- Fachbereich Bauingenieurwesen (2)
- Fachbereich Chemie und Biotechnologie (2)
- Fachbereich Medizintechnik und Technomathematik (2)
- FH Aachen (1)
- Fachbereich Architektur (1)
- Fachbereich Gestaltung (1)
- IMP - Institut für Mikrowellen- und Plasmatechnik (1)
- INB - Institut für Nano- und Biotechnologien (1)
- Nowum-Energy (1)
- Solar-Institut Jülich (1)
Language
- English (719)
- German (464)
- Multiple languages (1)
Document Type
- Article (629)
- Conference Proceeding (310)
- Book (114)
- Part of a Book (64)
- Patent (17)
- Report (9)
- Other (8)
- Conference: Meeting Abstract (6)
- Contribution to a Periodical (6)
- Course Material (6)
Keywords
- Multimediamarkt (7)
- Enterprise Architecture (5)
- MINLP (5)
- Engineering optimization (4)
- Gamification (4)
- Serious Game (4)
- Auslenkung (3)
- Digitale Transformation (3)
- Digitalisierung (3)
- Education (3)
ε-Fe3N has been investigated by time-of-flight neutron diffraction (temperature range 4.2–618 K) and SQUID magnetometry (2–700 K, B≤5 T). A ferromagnetic spin structure is observed with magnetic moments oriented perpendicular to the c-axis of the hexagonal nuclear structure. The magnetic saturation moment of iron is 2.2 μB at 4.2 K from neutron diffraction and 2.0 μB from magnetic measurements and decreases in a Brillouin-like manner on heating to TC=575 K. Above 450 K an increasing but reversible disorder of the nitrogen partial structure is observed.
Purpose
To assess the feasibility of prostate ¹H MR spectroscopic imaging (MRSI) using low-power spectral-spatial (SPSP) pulses at 7T, exploiting accurate spectral selection and spatial selectivity simultaneously.
Methods
A double spin-echo sequence was equipped with SPSP refocusing pulses with a spectral selectivity of 1 ppm. Three-dimensional prostate ¹H-MRSI at 7T was performed with the SPSP-MRSI sequence using an 8-channel transmit array coil and an endorectal receive coil in three patients with prostate cancer and in one healthy subject. No additional water or lipid suppression pulses were used.
Results
Prostate ¹H-MRSI could be obtained well within specific absorption rate (SAR) limits in a clinically feasible time (10 min). Next to the common citrate signals, the prostate spectra exhibited high spermine signals concealing creatine and sometimes also choline. Residual lipid signals were observed at the edges of the prostate because of limitations in spectral and spatial selectivity.
Conclusion
It is possible to perform prostate ¹H-MRSI at 7T with a SPSP-MRSI sequence while using separate transmit and receive coils. This low-SAR MRSI concept provides the opportunity to increase spatial resolution of MRSI within reasonable scan times.