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KMID : 0358320060470010070
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Korean Journal of Urology
2006 Volume.47 No. 1 p.70 ~ p.74
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Hounsfield Units of Urinary Calculi as a Predictor of the Therapeutic Effect of Extracorporeal Shockwave Lithotrips
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Chae Hyun-Soo
Lee Seong-Ho
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Abstract
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Purpose: Non-enhanced spiral computed tomography(NESCT) has become the preferred method for imaging urinary calculi. We evaluated the Hounsfield units(HU) of urinary calculi on NESCT as a predictor of the therapeutic effect of extracorporeal shockwave lithotripsy(ESWL).
Materials and Methods: We evaluated 72 patients with urinary calculi who underwent ESWL. The HUs of calculi were measured on the pretreatment NESCT and at post-treatment via radiographic assessment. The patients were divided into 2 groups, the response group(n=39): the patients with remnant calculi less than 3mm or they were without remnant calculi, and the non-response group(n=33): the patients with remnant calculi greater than 3mm. The HUs of the response and non-response groups were then compared.
Results: The HUs of the response and non-response groups were 529.7。168.2 and 814。116.6, respectively, and the HUs of the non-response group was significantly higher than that of the non-response group.
Conclusions: The HU of urinary calculi, as seen on NESCT, can help to predict the therapeutic effect of ESWL and also select the most effective treatment modalities for the patients suffering with urinary calculi. (Korean J Urol 2006;47:70-74)
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KEYWORD
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Urinary calculi, Tomography, Lithotripsy
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