JOURNAL OF SHANDONG UNIVERSITY (HEALTH SCIENCES) ›› 2015, Vol. 53 ›› Issue (9): 19-23.doi: 10.6040/j.issn.1671-7554.0.2014.931

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Effects of chemical composition of urinary stones on their acoustic shadowing

LIU Qing1, SHANG Mengmeng1, SUN Xiao1, LI Jie1, YANG Jie2, SHI Dandan1, NING Song1   

  1. 1. Department of Ultrasound, Qilu Hospital of Shandong University, Jinan 250012, Shandong, China;
    2. Department of Ultrasound, Rongjun General Hospital of Shandong, Jinan 250013, Shandong, China
  • Received:2014-12-09 Online:2015-09-10 Published:2015-09-10
  • Contact: 李杰。E-mail:jieli301@163.com E-mail:jieli301@163.com

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Abstract: Objective To quantitatively analyze the association between chemical composition of urinary stones and acoustic shadowing. Methods Calcium oxalate monohydrate, hydroxyapatite, cystine, and uric acid stone phantoms were prepared and embedded in porcine kidneys for ultrasound and CT scanning. The contrast-to-noise ratio (C/N) of acoustic shadowing and Hounsfield unit were recorded. All data obtained were analyzed statistically. Results All stones demonstrated high acoustic echo with shadowing. Of all stone phantoms, C/N ratio was 1.01-3.74, 2.17 in average. The hydrocyapatite stones displayed the strongest C/N ratio of acoustic shadowing and Hounsfield unit, followed by calcium oxalate monohydrate, cystine and uric acid stones (all P<0.001). The C/N ratio was significantly correlated with the Hounsfield unit (r=0.942,P<0.001) for all stone phantoms. Conclusion Stones with different chemical compositions have different acoustic shadowing, but the clarity of acoustic shadowing has the same trend with the Hounsfield unit, and acoustic shadowing can be used to predict the chemical compositions.

Key words: Chemical composition, Ultrasonography, Urinary stone, Computed Tomography, Acoustic shadowing

CLC Number: 

  • R816.7
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