The Value of True FISP Sequence as a Fast T2-Weighted MR Imaging of Liver: Comparison with Breath-hold Turbo Spin Echo and HASTE Sequence.
- Author:
Jai Keun KIM
1
;
Jeong Sik YU
;
Ki Whang KIM
;
Mi Gyung JEONG
;
Eun Kee JEONG
;
Young Hoon RYU
Author Information
1. Department of Diagnostic Radiology, Radiological Research Center, Yonsei University College of Medicine.
- Publication Type:Comparative Study ; Original Article
- Keywords:
Liver;
MR;
Magnetic Resonance(MR);
pulse sequences;
Magnetic Resonance(MR);
comparative studies
- MeSH:
Artifacts;
Hemangioma;
Hemangioma, Cavernous;
Humans;
Liver*;
Magnetic Resonance Imaging*;
Neoplasm Metastasis
- From:Journal of the Korean Society of Magnetic Resonance in Medicine
1999;3(3):245-250
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To document the relative usefulness of true Fast-imaging steady-state precession(FISP) comparing to breath-hold turbo spin-echo(TSE), and half-Fourier single-shot turbo spin-echo(HASTE) as a fast T2-weighted sequence during hepatic MR imaging. MATERIALS AND METHODS: For 46 patients with 87 focal hepatic lesions(hepatocellular carcinoma, n=26; metastasis. n=5; cavernous hemangioma, n=37; cyst, n=19), we obtained MR imaging of the liver at 1.5T. True FISP, TSE with and without fat-suppresion(FS), and HASTE with and without FS images were obtained during one breath-hold. Images were compared on the basis of tumor detectability and lesion-to-liver contrast-to-noise ratio(CNR). Qualitative analysis of each imaging sequence was also performed in terms of hepatic contour, visibility of vascular landmarks and imaging artifacts. RESULTS: TSE-FS depicted more focal lesions(78/87, 90%) than other sequences(TSE, 75/87=86%;HASTE, 74/87=85%; HASTE-FS, 75/87=86%;true FISP,73/87=84%). However, there was no statistical significance between each sequence(p> .05). Using true FISP or HASTE, there was a statistically significant difference(p< .01) between the CNRs of solid tumors, crystal and hemangiomas. Additionally, true FISP sequence showed better hepatic contour, vascular landmarks and less artifacts comparing with TSE or HASTE regardless of FS(p< .001). CONCLUSION: True FISP sequence allows differentiation between solid tumors, hemangiomas and cystic lesions in terms of CNR, and provides better imaging quality than other fast T2-weighted MR sequences.
