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요추부 초음파 유도하 중재술 서울성심병원 정형외과

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Fig. 1. (A) Surface anatomy of sacral region. PS; posterior superior iliac spine (PSIS), PI; posterior inferior iliac spine (PIIS), H; sacral hiatus, open arrow; lateral margin of sacrum, white arrowhead; sacral foramen, black arrowheads; iliac crest
Fig. 2. (A) Ultrasonography on longitudinal scan at midline of lumbar area shows cephalad part of spinous process in sacrum as landmark from which other lumbar spinous processes can be counted upwards
Fig. 3. (A) Target facet segment can be counted by longitudinal paravertebral sonogram corresponding with  previ-ously checked spinous process.
Fig. 6. (A) Ultrasonography on transverse scan at PIIS(posterior inferior iliac spine) shows deep flat sacral cortex (S) in left aspect and PIIS (P) like a high mountain with posterior acoustic shadow in right
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