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椎管大小测量对于评价椎管狭窄或肿块侵犯引起的椎管扩大很重要。测量技术有多种,因常规X线测量受影响因素多,故CT是理想的技术。作者用CT测量了105例病人的椎管直径,确定了椎管直径和Jones-Thomson(JT)系数的平均值。105例成人中,女性53例,年龄20～60岁,平均39.2岁。54例(51.4％)无腰椎症状为无症状组,51例(48.6％)伴腰椎症状为有症状组。病人仰卧,在侧位定位象上取第四腰椎中点以3mm层厚扫描,骨窗下测量椎管前后径(AP)和JT系数(椎管AP和
Spinal size measurements are important in assessing spinal canal enlargement due to stenosis or mass invasion. A variety of measurement techniques, due to conventional X-ray measurements affected by many factors, so CT is the ideal technology. The authors used CT to measure the diameter of the vertebral canal in 105 patients and determined the mean value of spinal canal diameter and Jones-Thomson (JT) coefficients. Of the 105 adults, 53 were women, aged 20 to 60 years, with an average of 39.2 years. 54 cases (51.4%) had no lumbar symptoms asymptomatic group, and 51 cases (48.6%) had lumbar symptoms as symptomatic group. The patient was supine, and the midpoint of the fourth lumbar vertebra was scanned with 3mm slice thickness in the lateral position, and the anteroposterior diameter (AP) and JT coefficient of vertebral canal