Reinig J W, Dwyer A J, Miller D L, Frank J A, Adams G W, Chang A E
Anne Arundel MRI, Annapolis, Md.
Radiology. 1989 Jan;170(1 Pt 1):149-53. doi: 10.1148/radiology.170.1.2909089.
Nineteen patients with known liver metastases were examined with two magnetic resonance (MR) pulse sequences at 0.5 T and three pulse sequences at 1.5 T. In addition, the patients were studied with computed tomography (CT) enhanced with ethiodized oil emulsion-13 (EOE-13). At 0.5 T a spin-echo (SE) 300/22 (repetition time/echo time, msec) sequence prospectively demonstrated 92.4% of the detectable liver metastases, while an SE 2,000/80 sequence showed 52.1% of the lesions. At 1.5 T, an SE 300/25 sequence depicted 68.3% and an SE 2,000/80 sequence 71.6%, while the more T1-weighted inversion recovery (IR) 2,000/600 (repetition time/inversion time, msec) sequence demonstrated 89.5% of the lesions. EOE-13 CT scans depicted 93.3%. These findings suggest that T1-weighted imaging is as successful at demonstrating liver metastases at 1.5 T with an IR 2,000/600 sequence as at 0.5 T with an SE 300/22 sequence. At both field strengths, MR imaging of the liver is comparable to state-of-the-art CT.
对19例已知有肝转移的患者分别采用0.5T的两种磁共振（MR）脉冲序列和1.5T的三种脉冲序列进行检查。此外，还对这些患者进行了用乙碘油乳剂-13（EOE-13）增强的计算机断层扫描（CT）检查。在0.5T时，自旋回波（SE）300/22（重复时间/回波时间，毫秒）序列前瞻性地显示出92.4%可检测到的肝转移灶，而SE 2000/80序列显示出52.1%的病灶。在1.5T时，SE 300/25序列显示出68.3%，SE 2000/80序列显示出71.6%，而更具T1加权的反转恢复（IR）2000/600（重复时间/反转时间，毫秒）序列显示出89.5%的病灶。EOE-13 CT扫描显示出93.3%。这些发现表明，在1.5T时采用IR 2000/600序列进行T1加权成像显示肝转移灶的效果与在0.5T时采用SE 300/22序列相当。在这两种场强下，肝脏的MR成像与先进的CT相当。
