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KMID : 1143620140180020073
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Korean Journal of Nuclear Medicine Technology
2014 Volume.18 No. 2 p.73 ~ p.77
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The Comparison of Glomerular Filteration Rate by Kidney Depth in Dynamic kidney Scan
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Hwang Ju-Won
Im Young-Hyun
Yun Jong-Jun
Lee Hwa-Jin
Lee Mu-Seok
Jung Ji-Wook
Park Se-Yun
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Abstract
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Purpose : Find out about the significance of the GFR values calculated by the kidney depth is measured by comparing the
values obtained for kidney depth was measured GFR in the CT image kidney depth and is calculated by Tonnesen law in 99mTc-DTPA dynamic kidney scan with each applies.
Materials and Methods : Among patients with normal value (75~120 mL/min) computed GFR conducted of dynamic renal
scan to visit from February 2013 to February 2014 and donor GFR values in patients with normal value. The mean age was 46.9 years with 14 men 13 females. We used abdomen CT image which checked before conducting dynamic Kidney scan for measuring the depth of kidney. We only used CT image that contains renal hilum and measured outermost front of the kidney from the skin surface (a) and the final surface (b) caculated the average depth of [(a + b) / 2] respectively.
Using the same ROI in order to limit the change in GFR values by the other additional element was set before and after the depth value was excluded from the GFR falls kidney disease.
Results : Using Tonnesen law the average value was caculated 5.94 cm from the right kidney 5.90 cm from the left kidney. It was 6.83 cm, 8.71 cm in the left kidney and the right kidney average value of the depth measured on the basis of the CT image. The respective increase in left kidney 0.93 cm and right kidney 2.77 cm calculated on the basis of CT image actually measured values. GFR was calculated as the average depth of the subject calculated by the method Tonnesen 83.3±9.79 mL/min. 98.6±14.07 mL/min GFR was applied to calculate the average depth of the subjects using the CT
image, is the difference appears 15.26 mL/min was increased after seting up depth value, P value was less than 0.01 which is significant.
Conclusion : The difference between GFR before-after setting up depth value cause that the different of depth value. Is a measured depth of the extension value of the calculated estimates Whereas Tonnesen kidney depth method is to use in calculating the value of GFR in a typical dynamic elongation test depth derived using the CT image depth. Is thought to be able to calculate more accurately the GFR value by the distance to the center of kidney more accurately measured in the skin thereby.
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KEYWORD
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GFR, kidney depth
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