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KMID : 0352519850220030307
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Korea Univercity Medical Journal
1985 Volume.22 No. 3 p.307 ~ p.316
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Determination of kidney volume by computed tomography
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安敬秀/Ahn, Kyung-Soo
金正爀/徐源赫/Kim, Jung-Hyuk/Suh, Won-Hyuck
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Abstract
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Computed tomography (CT) potentially offers the most accurate means of estimating organ volumes in vivo.
Authors measured the volume of the pig kidneys by CT in vitro, and measured by water displacement method for accuracy evaluation of CT method. Eleven fresh pig kidneys (120 to 200 gm) were steeped in saline plastic tray, scanned with Siemens Somatom II whole body scanner using slice thickness 0.8cm, interval 1.Ocm and scan time 5sec as like usual abdominal CT scan.
Immediately after completion of the CT scan, the volume and various dimensions were ,determined.
And 130 cases of normal Korean adults were selected arbitrarily in 6 groups of every decades, male and female, 10 to 12 cases in each group, and measured the renal dimensions and volume by CT.
The results were as follow:
1. Renal size measurement by CT was rapid and relatively simple procedure that is accurate to_"-;" in nephrectomized pig kidneys. And there was no statistical difference between CT method and direct measurement (P-value>0.05).
2. The renal volume of normal Korean adult was in the range of 110.7cm3350.4cm3.
3. Average of male renal volume was 213.2i56.7cm3 on left, and 167.655.2cm3 on right.
In female, average renal volume was 177.936.4cm3 on left, and 171.935.6cm3 on
right.
1. Male renal volume was about 30cm3 larger than that of female, and left kidney was about 10cm3 larger in volume than that of right.
5. In 43 cases of 130 cases(335o), no right and left size differences were noted or right renal volumes were larger than those of left.
In male, renal volume was increasedgradually from 2130 years group, and at age of 5160 years group, the renal volume was peak.
After then, the kidneys decrease gradually in volume with advancing age. But there was no evidence of age group difference in female renal volume.
6. In correlation between renal volume and length, breadth, AP dimension, the index was 0.575. So the ellipsoid equation was modified to V =0.575 x L x B x AP dimension (V : volume, B : breadth, L : length).
7. CT is one of the accurate and simple method to measure the organ volume in vivo.
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