What sequences on high-field MR best depict temporal resolution of experimental ICH and edema formation in mice?

What sequences on high-field MR best depict temporal resolution of experimental ICH and edema formation in mice?
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高场MR的最佳序列最佳描述了小鼠实验ICH和水肿形成的时间分辨率?

DOI:
10.1155/2012/961461
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发表时间:
2012
影响因子:
--
通讯作者:
Thiex R
Thiex R
中科院分区:
其他
文献类型:
--
作者:
Li M;Akhavan-Sharif RM;Friedlander RM;Du R;Thiex R

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背景和目的。初步研究旨在检查使用T1、T2和T2* 加权图像评价高场小鼠脑内血肿大小和水肿程度。方法.胶原酶诱导脑内出血后,在手术后第1、3、10和21天,使用T1、T2和T2* 加权图像在4.7 T下对9只小鼠进行血肿和水肿定量成像。在最终MR成像时,将这些值与冷冻切片的形态计量学分析进行比较。结果对于血肿定量,T1信号变化与组织学之间的斯皮尔曼相关系数(r)为0.70(P < 0.04),而T2* 的r = 0.61(P < 0.09)。血肿周围水肿的程度在T2上有很好的反映,r = 0.73(P < 0.03)。结论.在我们的初步研究范围内,4.7 T的MR成像似乎很好地近似了小鼠ICH中血肿和水肿大小的时间变化,从而为血肿吸收和水肿形成的纵向研究奠定了基础。
Background and Purpose. Pilot study to examine the use of T1-, T2-, and T2*-weighted images for evaluating hematoma size and extent of edema in mouse brain at high field. Methods. Following collagenase-induced intracerebral hemorrhage, nine mice were imaged at 4.7 T using T1-, T2-, and T2*-weighted images for hematoma and edema quantitation on days 1, 3, 10, and 21 after surgery. Values were compared with morphometric analysis of cryosections at the time of final MR imaging. Results. For hematoma quantitation, the Spearman correlation coefficient (r) between T1 signal change and histology was 0.70 (P < 0.04) compared with r = 0.61 (P < 0.09) for T2*. The extent of perihematomal edema formation on cryosections was well reflected on T2 with r = 0.73 (P < 0.03). Conclusions. Within the limits of our pilot study, MR imaging on 4.7 T appears to approximate the temporal changes in hematoma and edema sizes in murine ICH well, thus laying the groundwork for longitudinal studies on hematoma resorption and edema formation.
DOI: 10.1523/jneurosci.4323-06.2006
发表时间: 2006-12-13
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