Levine D, Barnes P D, Sher S, Semelka R C, Li W, McArdle C R, Worawattanakul S, Edelman R R
Department of Radiology, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA.
Radiology. 1998 Feb;206(2):549-54. doi: 10.1148/radiology.206.2.9457211.
To evaluate the normal appearance of fetal anatomy, the conspicuity of fetal organs, the reproducibility of images, and the limitations to image quality with the use of half-Fourier, single-shot rapid acquisition with relaxation enhancement (RARE) magnetic resonance (MR) imaging.
Fifty-four fetuses of 49 pregnancies underwent MR imaging with the half-Fourier, single-shot RARE technique. Two reviewers attempted to identify 47 organs and anatomic regions in each fetus. Organ or region conspicuity, image quality, and the limitations of image quality were graded.
Fetal anatomy was well depicted in fetuses over 20 weeks in gestational age. Fetal imaging was limited by gestational age of 20 weeks or less usually owing to the small size of the organ or region being evaluated and, less frequently, by motion.
Half-Fourier, single-shot RARE MR imaging provided a detailed and reproducible evaluation of normal fetal anatomy, which can be used as a standard of reference in MR imaging of fetal anomalies.
使用半傅里叶单次激发快速自旋回波（RARE）磁共振（MR）成像评估胎儿解剖结构的正常表现、胎儿器官的清晰度、图像的可重复性以及图像质量的局限性。
49例妊娠的54名胎儿接受了半傅里叶单次激发RARE技术的MR成像。两名阅片者试图识别每个胎儿的47个器官和解剖区域。对器官或区域的清晰度、图像质量以及图像质量的局限性进行分级。
孕龄超过20周的胎儿，其解剖结构显示良好。孕龄20周及以下的胎儿成像受限，通常是由于所评估的器官或区域较小，较少情况下是由于胎动。
半傅里叶单次激发RARE MR成像对正常胎儿解剖结构提供了详细且可重复的评估，可作为胎儿畸形MR成像的参考标准。
