Differential density of normal renal parenchyma on nonenhanced CT: a new observation.
Differential density of normal renal parenchyma on nonenhanced CT: a new observation.
复制标题
平扫 CT 上正常肾实质的密度差异：一项新观察。
DOI：
10.1097/00004728-199607000-00022
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发表时间：
1996
影响因子：
1.3
通讯作者：
A. Friedman
中科院分区：
文献类型：
--
作者：
E. Lautin;J. Scheiner;A. Rozenblit;D. Kaplan;R. Frankel;A. Friedman
目的
通过肾脏的非增强CT扫描通常显示肾实质的内肾盂周围部分和肾实质的更外围区域之间的不透射线性的差异。这种正常的观察结果没有被描述。
方法
我们回顾了50例非增强CT扫描。38例通过肉眼观察和肾内外部密度测量评价肾实质，12例仅通过肉眼观察。使用较窄的窗口来更好地显示密度差异（100 W，35 L）。我们记录了CT的适应症、病史和近期血生化。
结果
肉眼检查50例中35例内实质的不透射线性大于外实质，所有密度测量病例中38例（38/38）。与临床病史或血液化学无关。
结论
肾实质内外部密度的差异是很常见的，如果仔细观察，经常可以看到这种差异。我们还没有发现这种差异的病因，实际上，它可能是生理性的。我们必须意识到这一发现，以避免将其误认为病理学。
PURPOSE
Nonenhanced CT scans through the kidneys commonly show a difference in radiopacity between the inner peripelvic portion of the renal parenchyma and the more peripheral regions of the renal parenchyma. This normal observation has not been described.
METHOD
We reviewed 50 nonenhanced CT scans. Renal parenchyma was evaluated by both visual inspection and density measurements of inner and outer aspects of the kidneys in 38 and visual inspection only in 12. A narrower window was used to better show density differences (100 W, 35 L). We recorded the indication for the CT, history, and recent blood chemistries.
RESULTS
The inner parenchyma was of greater radiopacity than the outer parenchyma in 35 of 50 cases by visual inspection and in all densitometry cases (38 of 38). There was no correlation with clinical history or blood chemistry.
CONCLUSION
A difference in density between the inner and outer portions of the renal parenchyma is very common and will often be seen if one looks for it. We have not shown an etiology for this difference, and indeed, it may be physiological. One must be aware of this finding to avoid mistaking it for pathology.