Machen M Shaun, Stevens Peter M
University of Utah School of Medicine, Salt Lake City, Utah, USA.
J Pediatr Orthop B. 2005 Jan;14(1):30-7. doi: 10.1097/01202412-200501000-00005.
The orthoroentgenogram, commonly known as the 'scanogram', continues to be the most widely used imaging technique for measuring limb length discrepancy (LLD). This study reviews other methods of measuring LLD including full-length standing anteroposterior radiographs, computed tomography/digital localization image, and microdose digital scanography. We present seven cases that demonstrate the pitfalls of scanograms as compared with full-length standing anteroposterior radiographs. Illustrative cases provide the rationale for the clinician managing LLD on a regular basis to utilize full-length standing anteroposterior radiographs as the instrument that will provide the most clinically relevant information.
正位X线片，通常称为“扫描图”，仍然是测量肢体长度差异（LLD）最广泛使用的成像技术。本研究回顾了其他测量LLD的方法，包括全长站立前后位X线片、计算机断层扫描/数字定位成像和微剂量数字扫描摄影。我们展示了7例病例，这些病例证明了与全长站立前后位X线片相比，扫描图存在的缺陷。这些示例病例为临床医生定期处理LLD提供了理论依据，即应使用全长站立前后位X线片作为能提供最具临床相关性信息的工具。
