• 검색어에 아래의 연산자를 사용하시면 더 정확한 검색결과를 얻을 수 있습니다.
  • 검색연산자
검색연산자 기능 검색시 예
() 우선순위가 가장 높은 연산자 예1) (나노 (기계 | machine))
공백 두 개의 검색어(식)을 모두 포함하고 있는 문서 검색 예1) (나노 기계)
예2) 나노 장영실
| 두 개의 검색어(식) 중 하나 이상 포함하고 있는 문서 검색 예1) (줄기세포 | 면역)
예2) 줄기세포 | 장영실
! NOT 이후에 있는 검색어가 포함된 문서는 제외 예1) (황금 !백금)
예2) !image
* 검색어의 *란에 0개 이상의 임의의 문자가 포함된 문서 검색 예) semi*
"" 따옴표 내의 구문과 완전히 일치하는 문서만 검색 예) "Transform and Quantization"
쳇봇 이모티콘
ScienceON 챗봇입니다.
궁금한 것은 저에게 물어봐주세요.

논문 상세정보

Gadolinium 조영증강 뇌자기공명영상에서 자화전이의 효과

Effects of Magnetization Transfer in Gadolinium-Enhanced Brain MR Imaging


Purpose : To evaluate the effect of magnetization transfer(MT) in contrast-enhanced brain MR imaging of the various intracranial diseases. Materials and Methods : We prospectively studied the effect of MT in contrast-enhanced brain MR imaging 101 patients with a variety of intracranial diseases. In all patients contrast-enhanced T1-weighted(TR/TE = 550 \14) SE MR images with and without MT were obtained on a 1.5 T superconducting unit(Magnetom, Siemens). The MT pulse used for MT images was an 8.1 msec(=250 Hz band width) sync pulse, 1000 Hz off-resonance. We randomly divided the patients into two groups : group I and group II. Group I consisted of 54 patients in whom contrast-enhanced images without MT and then images with MT were obtained justofter the injection of Gd-DTPA(0.1 mmol/kg). In group II(47 patients), contrast-enhanced images with MT and then the images without MT were obtained, considering the delayed-enhancement effect. The effect of MT was assessed visually and quantitatively. For quantitative assessment, contrast to noise ratios(CNR) were calculated in 27cases with enhancing intracranial tumors larger than 1 cm. We then compared CNRs of contrast-enhanced images with and without MT. The paired t-test was used for statistical analysis. Results : On visual assessment, only11.9%(12\101) of normally enhancing structures and only 20.3%(14/69) of enhancing lesions showed improved enhancement in images with MT. There washowever, no case in which the enhancing lesion was seen only in MR image with MT but not in that without MT. On quantitative analysis there was no statistically significant difference between overall images with MT and those without MT(p〉0.05). The average CNR of images with MT was higher than that of images without MT in group I, but not in group II. Conclusion : MT in contrast-enhanced brain MR imaging resulted in contrast improvement in a limited number(less than approximately 20%) of patients. Routine application of MT images to contrast-enhanced brain MR imaging may be of limited value. Further studies on the clinical usefulness of MT technique with more refined MT pulse are thus needed.

저자의 다른 논문

참고문헌 (17)

  1. Pulsed magnetization transfer versus continuous wave irradiation for tissue contrast enhancement , Schneider E;Prost RW;Glover GH , J Magn Reson Imaging / v.3,pp.417-423, 1993
  2. Magnetization transfer contrast: Method for improving contrast in gradient-recalled-echo images , Wolff SD;Eng J;Balaban RS , Radiology / v.179,pp.133-137, 1991
  3. Intracranial MR angiography: Application of magnetization transfer contrast and fat saturation to short gradient-echo, velocity-compensated sequences , Lin W;Tkach JA;Haacke EM;Maasarryk TJ , Radiology / v.186,pp.753-761, 1993
  4. Gadolinium-enhanced magnetization transfer contrast imaging of intracranial tumors , Kurki TJI;Niemi PT;Lundbom N , J Magn Reson Imaging / v.2,pp.401-406, 1992
  5. Combined effects of magnetization transfer and gadolinium in cranial MR imaging and MR angiography , Mathews VP;Elster AD;King JC;Ulmer JL;Hamilton CA;Strottmann JM , AJR / v.164,pp.169-172, 1995
  6. Improved time of flight MR angiography of the brain with magnetization transfer contrast , Elderman RR;Ahn SS;Chien D(et al.) , Radiology / v.184,pp.395-399, 1992
  7. Synergistic enhancement of MRI with Gd-DTPA and magnetization transfer , Tanttu JI;Sepponen RE;Lipton MJ;Kuusela T , J Comput Assist Tomogr / v.16,pp.19-24, 1992
  8. Design and implementation of magnetization transfer pulse sequences for clinical use , Hajnal JV;Baudouin CJ;Oatridge A;Young JR;Bydder GM , J Comput Assist Tomogr / v.16,pp.7-18, 1992
  9. Improved contrast of enhancing brain lesions on postgadolinium, T1-weighted spin-echo images with use of magnetization transfer , Finelli DA;Hurst GC;Gullapali RP;Bellon EM , Radiology / v.190,pp.553-559, 1994
  10. Experimental allergic encephalomyelitis and multiple sclerosis: lesion characterization with magnetization transfer imaging , Dousset V;Grossman RI;Ramer KN(et al.) , Radiology / v.182,pp.483-491, 1992
  11. Magnetization transfer effects in MR imaging of in vivo intracranial hemorrhage , Mittl RL;Gomori JM;Schnall MD;Holland GA;Grossman RI;Atlas SW , AJNR / v.14,pp.881-891, 1993
  12. Magnetization transfer: Theory and clinical applications in neuroradiology , Grossman RI;Gomori JM;Ramer KN;Lexa FJ;Schnal MD , RadioGraphics / v.14,pp.279-290, 1994
  13. Magnetization transfer imaging: Practical aspects and clinical applications , Wolff SD;Balaban RS , Radiology / v.192,pp.593-599, 1994
  14. Metastatic lesions of the brain: Imaging with magnetization transfer , Boorstein JM;Wong KT;Grossman RI;Bolinger L;McGowan JC , Radiology / v.191,pp.799-803, 1994
  15. Magnetization transfer contrast(MTC) and tissue water proton relaxation in vivo , Wolff SD;Balaban RS , Magn Reson Med / v.10,pp.135-144, 1989
  16. Cranial tissue : Gadolinium-enhanced and nonenhanced MR imaging with magnetization transfer contrast , Elster AD;King JC;Mathews VP;Hamilton CA , Radiology / v.190,pp.541-546, 1994
  17. Cerebral infarction: Effects of dose and magnetization transfer saturation at gadolinium-enhanced MR imaging , Mathews VP;King JC;Elster AD;Hamilton CA , Radiology / v.190,pp.547-552, 1994

이 논문을 인용한 문헌 (1)

  1. 1997. "Contrast-Enhanced Turbo Spin-Echo(TSE) T1-weighted Imaging : Improved Contrast of enhancing Lesions" 대한방사선의학회지 = Journal of the Korean Radiological Society, 37(3): 379~384 


원문 PDF 다운로드

  • 원문 PDF 정보가 존재하지 않습니다.

원문 URL 링크

  • 원문 URL 링크 정보가 존재하지 않습니다.

원문 PDF 파일 및 링크정보가 존재하지 않을 경우 KISTI DDS 시스템에서 제공하는 원문복사서비스를 사용할 수 있습니다. (원문복사서비스 안내 바로 가기)

상세조회 0건 원문조회 0건

DOI 인용 스타일