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KMID : 0378120030300010137
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Chungnam Medical Journal
2003 Volume.30 No. 1 p.137 ~ p.143
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Animal Study of Renal Volume Measurement on Unenhanced Abdominal CT Using Digital Image Processing : Preliminary Report
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Kim Jong-Chul
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Abstract
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To evaluate the usefulness of automatic segmentation and volume measurement of the kidney using newly developed digital image processing on unenhanced abdominal computed tomography(CT) in pigs.
Unenhanced abdominal CT scans of two anesthetized four-month-old Landrace pigs were performed with 3-mm slice interval. Both kidneys on CT were extracted by two steps of image processing: (1) automatic segmentation in a single slice using the character of pixel distribution of the kidney, and (2) removal of residual noise using batch processing with folding method. The volume of kidney was determined using information of slice thickness and pixel size. Finally the measured renal volume by this digital image processing method was compared with the actual renal volume obtained by means of three consecutive water displacement measurements on surgically removed specimen of both kidneys.
As a result of comparison between mean renal volume of both sides measured by digital image processing (78.3. 67.4cm^(3); right & left respectively) and mean actual renal volume(80, 70cm^(3)), the error was less than 3.7%.
The renal volume determined by this digital image processing was almost as same as the actual renal volume. The method used in this study will be clinically applicable to determine renal volume both in normal persons and patients.
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KEYWORD
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Kidney CT experimental studies, Kidney CT, Kidney image processing
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