Artifacts associated with MR neuroangiography.

Artifacts associated with MR neuroangiography.
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与 MR 神经血管造影相关的伪影。

DOI:
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发表时间:
1992
期刊:
AJNR. American journal of neuroradiology
影响因子:
--
通讯作者:
David Norman
David Norman
中科院分区:
--
文献类型:
--
作者:
J. Tsuruda;D. Saloner;David Norman

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神经血管磁共振血管造影术(MRA)正迅速获得更广泛的临床接受。为了提供功能信息,使用了获取、信息处理和显示的新技术,生成了一组新的人工产物。本文的目的是通过将MRA伪影分为六种常见类型来概述其产生的原因、提供实例并指出与其相关的临床问题:1)小血管的可视化差,2)对狭窄的高估,3)视图间的差异,4)假阳性,5)假阴性,6)血管重叠。这又将导致四个通用的解决方案:1)优化采集参数,2)在执行最大强度投影重建之前编辑体边界,3)参考单个源图像,以及4)使用替代图像处理。通过将临床问题和解决方案组织和简化为主要类别,可以更好地了解当前的临床适应症和MRA的总体目标。
Neurovascular MR angiography (MRA) is rapidly gaining greater clinical acceptance. To provide functional information, novel techniques of acquisition, information processing, and display are used, generating a new set of artifacts. The purpose of this paper is to outline the causes, provide examples, and note clinical problems associated with MRA artifacts by grouping them into six common types: 1) poor visualization of small vessels, 2) overestimation of stenosis, 3) view-to-view variations, 4) false positives, 5) false negatives, and 6) vessel overlap. This in turn will lead to four generalized solutions: 1) optimize acquisition parameters, 2) edit volume boundaries before performing maximum intensity projection reconstructions, 3) refer to the individual source images, and 4) use alternative image processing. By organizing and simplifying both clinical problems and solutions into major categories, a greater understanding of the current clinical indications and the overall goals of MRA can be achieved.
颈动脉分叉处的 3DFT MR 血管造影:作为筛查检查的潜力和局限性。
DOI: 10.1148/radiology.179.3.2027995
发表时间: 1991
期刊: Radiology
影响因子: 19.7
作者:
Masaryk,AM;Ross,JS;DiCello,MC;Modic,MT;Paranandi,L;Masaryk,TJ
通讯作者: Masaryk,TJ
使用相敏、有限翻转角、梯度回忆脉冲序列对血流进行快速 MR 成像:初步经验。
DOI: 10.1148/radiology.176.1.2353099
发表时间: 1990
期刊: Radiology
影响因子: 19.7
作者:
Spritzer,CE;Pelc,NJ;Lee,JN;Evans,AJ;Sostman,HD;Riederer,SJ
通讯作者: Riederer,SJ