Seiler Gabriela S, Robertson Ian D, Mukundan Srinivasan, Thrall Donald E
Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough Street, Raleigh, NC 27606, USA.
Vet Radiol Ultrasound. 2011 May-Jun;52(3):313-6. doi: 10.1111/j.1740-8261.2010.01769.x. Epub 2010 Dec 13.
Pulsatile venous flow in the internal vertebral venous plexus of the cervical spine can lead to vertical, linear T2-hyperintensities in the spinal cord at the cranial aspect of C3 and C4 in transverse T2-weighted images in large breed dogs that are not accompanied by ghosting. The artifact is more conspicuous in pre- and postcontrast transverse T1-weighted images and is accompanied by ghosting in that sequence, typical of a pulsatility artifact. A flow-related artifact was confirmed as the cause for this appearance by noting its absence after either exchange of phase and frequency encoding direction or by flow compensation. Care should be exercised to avoid misdiagnosing this pulsatility artifact seen in transverse T2-weighted images of the midcervical spine in large dogs as an intramedullary lesion when T1-images or phase-swap images are not available to confirm its artifactual origin.
在大型犬中，颈椎内部椎静脉丛的搏动性静脉血流可导致在横断位T2加权图像上，脊髓在C3和C4头侧出现垂直、线性的T2高信号，且不伴有鬼影伪影。该伪影在增强前后的横断位T1加权图像中更明显，并在该序列中伴有鬼影，这是搏动性伪影的典型表现。通过注意到在交换相位和频率编码方向或进行血流补偿后该伪影消失，证实了与血流相关的伪影是导致这种表现的原因。当没有T1图像或相位交换图像来确认其伪影来源时，应小心避免将大型犬中颈椎中段横断位T2加权图像上出现的这种搏动性伪影误诊为髓内病变。
