Transrectal ultrasonography of the lumbosacroiliac area is routinely performed for the diagnosis of the cause of low back pain and poor hindlimb impulsion and engagement. The ventral aspect of the caudal lumbar intervertebral discs and vertebrae can be easily assessed transrectally with ultrasound while other imaging modalities have limitations for diagnosis of intervertebral disc injuries. This paper is a review of the ultrasonographic procedure for imaging the ventral aspect of the caudal lumbar and lumbosacral symphyses, especially the intervertebral discs. Normal images, findings and lesions of the three caudalmost lumbar intervertebral discs are described (between the 4th lumbar and the 1st sacral vertebrae).

中文翻译：

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回顾经直肠超声检查对评估腰椎（包括腰s部），椎间盘和共生症的评估：超声检查的正常和异常

常规行腰osa部直肠超声检查，以诊断下腰痛和后肢冲动和接合不良的原因。超声可以容易地经直肠评估尾椎腰椎间盘和椎骨的腹侧，而其他成像方式在诊断椎间盘损伤方面存在局限性。本文是对超声成像过程的综述，该成像过程用于对尾部腰椎和腰ac骨共生症（尤其是椎间盘）的腹侧成像。描述了三个最后尾椎间盘的正常图像，发现和病变（在第4腰椎和第1 ac椎椎骨之间）。