The use of a phased-array surface coil and breath-holding in MRI of the liver. Comparison of conventional SE, fat-suppressed GRE, and TSE sequences
Creators
- 1. Inst. fuer Radiologische Diagnostik, Klinikum Grosshadern, Muenchen Univ. (Germany)
Description
To determine the efficacy of fast MRI techniques using a taylored imaging design (breathhold and array-surface coil), conventional T1-, T2-weighted spin-echo (SE) sequences and breathhold gradient-echo (GRE) T1- and breathhold fast SE T2-weighted images were compared. 20 patients with proven focal liver lesions were studied on a 1.5 Tesla system. Conventional SE T1- und T2-weighted imaging, as well as GRE T1- and fast SE T2-weighted imaging was performed. Fast imaging was done during breathhold using an array-surface coil. For all sequences signal-to-noise ratios (S/N) and liver-to-lesion-contrast ratios (L/L) were measured and statistically compared. Regarding image quality parameters, S/N and L/L, there was no significant difference between the conventional and fast imaging techniques. However, GRE imaging was superior (84.8%) to conventional imaging for breathing and pulsation artifacts, while fast SE T2 imaging was equal regarding breathing artifacts, but superior (51.5%) regarding pulsation artifacts. The number of detected hepatic lesions was identical in all sequences. The fast MRI techniques demonstrated a superiority to conventional imaging regarding image quality and presence of artifacts. (orig.)
Abstract (German)
Bei der MRT der Leber zeigte der Vergleich konventioneller T1- und T2-gewichteter Spinecho-(SE-)Sequenzen mit schnellen T1-gewichteten Gradientenecho-(GRE-) und T2-gewichteten Multiechosequenzen (fast SE, FSE; turbo SE, TSE) in Atemstillstand und unter Verwendung einer Oberflaechenspule keinen signifikanten Unterschied zwischen den getesteten Sequenzen hinsichtlich der Signal-Rausch- und Leber-Laesion-Kontrastverhaeltnisse. Allerdings wiesen die schnellen T1-gewichteten Sequenzen deutlich weniger Atem- und Pulsationsartefakte (84,4%) auf, waehrend die schnellen T2-gewichteten Sequenzen lediglich weniger Pulsationsartefakte (66,7%) erkennen liessen als die konventionellen SE-Sequenzen. Die Anzahl der entdeckten Leberlaesionen differierte ebenfalls nicht signifikant zwischen den einzelnen Sequenzen. Bei gleichbleibender Bildqualitaet, jedoch deutlich reduzierten Artefakten gegenueber konventionellen SE Sequenzen koennen daher die schnellen Bildgebungstechniken in Atemstillstand und unter Verwendung einer Oberflaechenspule die konventionelle SE Bildgebung ersetzen. (orig.)Additional details
Additional titles
- Original title (German)
- Array-Oberflaechenspule und Atemanhaltetechnik bei der MRT der Leber. Vergleich konventioneller Spinechosequenzen mit schnellen, fettunterdrueckenden Gradientenecho- und Turbospinechosequenzen
Publishing Information
- Journal Title
- Radiologe
- Journal Volume
- 35
- Journal Issue
- 12
- Journal Page Range
- p. 919-924.
- ISSN
- 0033-832X
- CODEN
- RDLGBC
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 27025787
- Subject category
- S62: RADIOLOGY AND NUCLEAR MEDICINE;
- Descriptors DEI
- ADIPOSE TISSUE; BREATH; COMPARATIVE EVALUATIONS; DIAGNOSIS; DIGESTIVE SYSTEM DISEASES; IMAGES; LIVER; MAGNET COILS; NEOPLASMS; NMR IMAGING; OPTIMIZATION; PATIENTS; PULSE TECHNIQUES; RELAXATION TIME; SIGNAL-TO-NOISE RATIO; SPIN ECHO; SPIN-LATTICE RELAXATION; SPIN-SPIN RELAXATION
- Descriptors DEC
- ANIMALS; BODY; CONNECTIVE TISSUE; DIAGNOSTIC TECHNIQUES; DIGESTIVE SYSTEM; DISEASES; ELECTRIC COILS; ELECTRICAL EQUIPMENT; EQUIPMENT; EVALUATION; GLANDS; MAMMALS; MAN; ORGANS; PRIMATES; RELAXATION; TISSUES; VERTEBRATES