講演抄録/キーワード |
講演名 |
2010-01-29 14:20
[招待講演]Recent Advances in Abdominal MRI and its Clinical Application ○Yong Eun Chung・Se Hyung Kim(Seoul Nat. Univ. Hospital) MI2009-154 |
抄録 |
(和) |
MRI systems have recently undergone dramatic improvement in capability with innovations in technology and technique. The higher magnetic field strength of 3T MR systems have provided higher SNR than previous 1.5T MR systems, thereby improving spatial resolution, temporal resolution and/or a combination of both. Phased-arrary coils have also increased SNR and with parallel imaging has improved spatial and/or temporal resolution. And diffusion weighted imaging, when applied to abdominal MR, has allowed better detection of small lesions than conventional MRI and has enabled the prediction of treatment response of malignant tumors and evaluation of treatment efficacy. DWI also has the potential to evaluate the degree or severity of liver fibrosis or cirrhosis. Another improvement in MR technology is in the availability of various tissue specific MR contrast agents based on their distribution in the body. Extracellular contrast agents are generally used in abdominal MRI and are helpful for the detection of hypervascular lesions. Hepatocyte specific agents can be used as a positive contrast agent of the liver on T1-weighted images. And RES specific contrast agent is taken by the RES system and works as a negative contrast agent by darkening the normal liver on T2-weighted images. Most recently, hybrid contrast agents which have both the characteristics of extracellular and hepatocyte specific contrast agents have been developed. With these developments of the MRI system, diagnostic accuracy has been much improved. |
(英) |
MRI systems have recently undergone dramatic improvement in capability with innovations in technology and technique. The higher magnetic field strength of 3T MR systems have provided higher SNR than previous 1.5T MR systems, thereby improving spatial resolution, temporal resolution and/or a combination of both. Phased-arrary coils have also increased SNR and with parallel imaging has improved spatial and/or temporal resolution. And diffusion weighted imaging, when applied to abdominal MR, has allowed better detection of small lesions than conventional MRI and has enabled the prediction of treatment response of malignant tumors and evaluation of treatment efficacy. DWI also has the potential to evaluate the degree or severity of liver fibrosis or cirrhosis. Another improvement in MR technology is in the availability of various tissue specific MR contrast agents based on their distribution in the body. Extracellular contrast agents are generally used in abdominal MRI and are helpful for the detection of hypervascular lesions. Hepatocyte specific agents can be used as a positive contrast agent of the liver on T1-weighted images. And RES specific contrast agent is taken by the RES system and works as a negative contrast agent by darkening the normal liver on T2-weighted images. Most recently, hybrid contrast agents which have both the characteristics of extracellular and hepatocyte specific contrast agents have been developed. With these developments of the MRI system, diagnostic accuracy has been much improved. |
キーワード |
(和) |
Magnetic resonance imaging / diffusion weighted imaging / parallel imaging acquisition / contrast agent / / / / |
(英) |
Magnetic resonance imaging / diffusion weighted imaging / parallel imaging acquisition / contrast agent / / / / |
文献情報 |
信学技報, vol. 109, no. 407, MI2009-154, pp. 423-427, 2010年1月. |
資料番号 |
MI2009-154 |
発行日 |
2010-01-21 (MI) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します.(許諾番号:10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
PDFダウンロード |
MI2009-154 |