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Paper Abstract and Keywords
Presentation 2009-01-21 09:50
[Poster Presentation] Computer-Assisted Texture Analysis of DMSA Scintigraphy in Diagnosis of Pyelonephritis
Duck-Joo Choi, Kyung Hoon Hwang, Minkyung Lee, Wonsick Choe (Gachon Univ. Gil Hospital)
Abstract (in Japanese) (See Japanese page) 
(in English) DMSA renal scan has been used to evaluate renal parenchymal lesions such as pyelonephritis. However, it is frequently difficult to differentiate pelvocalyectatic defects from true cortical defects. We investigated whether DMSA renal scan images could be effectively evaluated by computer-assisted texture analysis such as fractal texture analysis. We retrospectively analyzed 35 DMSA renal scan images - 12 normal kidneys, 11 with pelvocalyectatic cortical defects and 12 with true cortical defects. The kidneys on DMSA scan images were segmented by the binary threshold and subtraction techniques, and the texture analysis was done using a fractal texture analysis tool (Image-J). The values from the texture analysis were compared between the three groups using student's t-test and ROC curve analysis. In addition, patients。ッ urinanalysis laborotary data was added to the texture analysis values and analyzed using discriminant analysis. The kidney images with true cortical defects showed higher fractal texture values than those of normal or pelvocalyectatic kidneys, but was not statistically significant. There was a significant difference in fractal texture values only between normal and pelvocalyectatic kidneys (p<0.05). ROC curve analysis in fractal texture values between the groups of true cortical defects and pelvocalyectases demonstrated the best cut-off value of 1.703 (Sensitivity of 91.7% and specificity of 72.7%) and area under curve of 0.833. Discriminant analysis combining the fractal texture values and patients。ッ urinanalysis laborotary data showed no further improvement in differential diagnostic accuracy. Although the number of images is limited, computer-assisted fractal texture analysis may be helpful to differentiate pelvocalyectatic defects from true defects. However, further studies including more cases and clinical parameters are warranted.
Keyword (in Japanese) (See Japanese page) 
(in English) Computer-assisted / Texture analysis / DMSA / Renal scan / Pyelonephritis / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 385, MI2008-168, pp. 493-494, Jan. 2009.
Paper # MI2008-168 
Date of Issue 2009-01-12 (MI) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380

Conference Information
Committee MI  
Conference Date 2009-01-19 - 2009-01-21 
Place (in Japanese) (See Japanese page) 
Place (in English) National Taiwan University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Medical Imaging 
Paper Information
Registration To MI 
Conference Code 2009-01-MI 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Computer-Assisted Texture Analysis of DMSA Scintigraphy in Diagnosis of Pyelonephritis 
Sub Title (in English)  
Keyword(1) Computer-assisted  
Keyword(2) Texture analysis  
Keyword(3) DMSA  
Keyword(4) Renal scan  
Keyword(5) Pyelonephritis  
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1st Author's Name Duck-Joo Choi  
1st Author's Affiliation Gachon University Gil Hospital (Gachon Univ. Gil Hospital)
2nd Author's Name Kyung Hoon Hwang  
2nd Author's Affiliation Gachon University Gil Hospital (Gachon Univ. Gil Hospital)
3rd Author's Name Minkyung Lee  
3rd Author's Affiliation Gachon University Gil Hospital (Gachon Univ. Gil Hospital)
4th Author's Name Wonsick Choe  
4th Author's Affiliation Gachon University Gil Hospital (Gachon Univ. Gil Hospital)
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Speaker
Date Time 2009-01-21 09:50:00 
Presentation Time 140 
Registration for MI 
Paper # IEICE-MI2008-168 
Volume (vol) IEICE-108 
Number (no) no.385 
Page pp.493-494 
#Pages IEICE-2 
Date of Issue IEICE-MI-2009-01-12 


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