Department of Radiology, Tokyo Women's Medical University Medical Center East, 2-1-10 Nishiogu, Arakawa, Tokyo, 116-8567, Japan.
Jpn J Radiol. 2013 Jul;31(7):465-70. doi: 10.1007/s11604-013-0219-3. Epub 2013 Jun 7.
To investigate the feasibility of dual-energy subtraction (DES) in patients with moderate-severe cervical spondylosis for improving delineation of the larynx on flat panel detector (FPD) radiography.
For 118 patients, we graded conventional/DES anterior-posterior views for delineation of the vocal cords, subglottis, and pyriform sinus using a 5-point scale and lateral views from conventional laryngeal FPD radiography to determine cervical spondylosis severity on a scale from 0 (none) to 3 (severe). We compared the delineation of each anatomical structure in both groups of grades 0-1 and grades 2-3 of spondylosis severity between conventional and DES methods and the improved delineation rate for each anatomical structure by DES compared to the conventional method between both groups.
With DES, the delineation of each anatomical structure was significantly better than with conventional radiography for both groups (P < 0.0001). The improved delineation rate of the vocal cord and subglottis using DES was significantly higher in grades 2-3 than in grades 0-1 (P < 0.05), although there was no significant difference in the delineation rate of the pyriform sinus between the groups (P = 0.847).
DES provides better delineation of the laryngeal anatomy than conventional FPD radiography predominantly in patients with moderate-severe cervical spondylosis.
研究双能减影（DES）在中重度颈椎病患者中的可行性，以改善平板探测器（FPD）摄影中喉的勾画。
对 118 例患者，我们使用 5 分制对常规/DES 前后位声带、声门下区和梨状窝进行勾画评分，对常规 FPD 侧位片进行颈椎病变程度评分（0 分无，3 分严重）。我们比较了两组颈椎病变严重程度为 0-1 级和 2-3 级的常规和 DES 方法的各解剖结构勾画，以及与常规方法相比 DES 对各解剖结构勾画的改善率。
与常规 X 线摄影相比，DES 对两组各解剖结构的勾画均明显更好（P<0.0001）。2-3 级病变组中，DES 对声带和声门下区的勾画改善率明显高于 0-1 级病变组（P<0.05），但两组梨状窝的勾画改善率无统计学差异（P=0.847）。
DES 较常规 FPD 摄影能更好地勾画喉部解剖结构，主要适用于中重度颈椎病患者。
