Lee Chang Hee, Park Cheol Min, Kim Kyeong Ah, Hong Suk Joo, Seol Hae Young, Kim Baek Hyun, Kim Jung Hyuk
Department of Radiology, Korea University College of Medicine, Guro Hospital, Guro-Ku, Seoul, South Korea.
Clin Anat. 2007 Nov;20(8):905-14. doi: 10.1002/ca.20540.
The aim of our study was to examine the locational distribution of paraspinal structures on MRI and to determine any predictable parameters that may be used for the identification of transitional vertebra (TV). We enrolled 534 patients who underwent MRI of their lumbosacral spine. The locations of the paraspinal structures, such as aortic bifurcation (AB), IVC confluence (IC), right renal artery (RRA), celiac trunk (CT), SMA root (SR), and iliolumbar ligament (ILL), were determined using "cross link" in PACS. We also assessed the morphology of the TV. The MRI showed that the most common site of the paraspinal structures in the normal group was AB at the lower L4, IC at the L4-5 disc space, RRA at the L1-2 disc space, CT at the T12-L1 disc space, SR at the upper L1, and ILL at the L5. The frequency of TV was 23.8% (lumbarization, 9.9%; sacralization, 13.9%). The paraspinal structures of the S1 lumbarization were positioned more toward the caudal location, whereas the paraspinal structures of the L5 sacralization were positioned more toward the cephalic location (P < 0.01). In conclusion, AB, IC, RRA, CT, SR, and ILL are useful landmarks for predicting the presence of TV on MRI. TV is possible when these paraspinal structures are in positions outside of the frequent locations.
我们研究的目的是检查脊柱旁结构在磁共振成像（MRI）上的位置分布，并确定任何可用于识别移行椎（TV）的可预测参数。我们纳入了534例接受腰骶部脊柱MRI检查的患者。使用PACS中的“交叉链接”确定脊柱旁结构的位置，如主动脉分叉（AB）、下腔静脉汇合处（IC）、右肾动脉（RRA）、腹腔干（CT）、肠系膜上动脉根部（SR）和髂腰韧带（ILL）。我们还评估了移行椎的形态。MRI显示，正常组中脊柱旁结构最常见的位置是L4下缘的AB、L4-5椎间盘间隙的IC、L1-2椎间盘间隙的RRA、T12-L1椎间盘间隙的CT、L1上缘的SR和L5的ILL。移行椎的发生率为23.8%（腰椎化，9.9%；骶椎化，13.9%）。S1腰椎化的脊柱旁结构位置更偏向尾侧，而L5骶椎化的脊柱旁结构位置更偏向头侧（P<0.01）。总之，AB、IC、RRA、CT、SR和ILL是预测MRI上移行椎存在的有用标志。当这些脊柱旁结构位于常见位置之外时，可能存在移行椎。
