Abnormalities of the diaphragm and adjacent structures: findings on multiplanar spiral CT scans.
Abnormalities of the diaphragm and adjacent structures: findings on multiplanar spiral CT scans.
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膈肌和邻近结构的异常：多平面螺旋 CT 扫描的结果。
DOI：
10.2214/ajr.163.2.8037020
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
S. Sagel
中科院分区：
文献类型：
--
作者：
J. Brink;J. Heiken;J. Semenkovich;S. Teefey;B. McClennan;S. Sagel
众所周知，横膈膜和周围组织的剥离很难用传统的轴向CT成像。在过去的10年中，MR的多平面成像能力已被用于澄清膈附近肿块的起源器官。螺旋CT现在提供了类似的功能。使用螺旋CT，可以在一次屏气中扫描脑血管周围区域，最大限度地减少运动伪影并几乎消除呼吸误配准。从容积螺旋CT投影数据集回顾性重建紧密间隔、重叠部分的轴向图像。从这些图像中，可以生成通过隔膜和相邻异常的高细节多平面重建。由于胸部和腹部固有的CT衰减值覆盖范围很广，因此预计三维重建不会比二维重建更好地描述该解剖结构。这是因为三维图像通常在CT衰减的极端处或在CT衰减值的窄窗口内呈现结构。本文阐述了螺旋CT扫描的二维矢状面和冠状面重建在评价脑周区的重要性。通过这些重建，在轴位图像上看到的心包周围异常局限于肺、胸膜、心包、心腔或腹腔内内脏。
Abnormalities of the diaphragm and surrounding tissues have been notoriously difficult to image with conventional axial CT. During the past 10 years, the multiplanar imaging capabilities of MR have been used to clarify the organ of origin of masses near the diaphragm. Spiral CT now offers a similar capability. With spiral CT, the peri-diaphragmatic region can be scanned in a single breath-hold, minimizing motion artifacts and virtually eliminating respiratory mis-registration. Axial images of closely spaced, overlapping sections are reconstructed retrospectively from the volumetric spiral CT projection data set. From these images, one can generate high-detail multiplanar reformations through the diaphragm and adjacent abnormalities. As the CT attenuation values inherent to the chest and abdomen cover a wide range, three-dimensional reformations are not expected to depict this anatomy better than two-dimensional reformations can. This is because three-dimensional images generally render structures at the extremes of CT attenuation, or within a narrow window of CT attenuation values. This pictorial essay illustrates the importance of two-dimensional sagittal and coronal reformations of spiral CT scans in evaluating the peri-diaphragmatic area. With these reformations, peri-diaphragmatic abnormalities seen on axial images are localized to the lung, pleura, pericardium, cardiophrenic space, or intraabdominal viscera.