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Computed tomography window affects kidney stones measurements
Danilovic, Alexandre; Rocha, Bruno Aragão; Marchini, Giovanni Scala; Traxer, Olivier; Batagello, Carlos; Vicentini, Fabio Carvalho; Torricelli, Fábio César Miranda; Srougi, Miguel; Nahas, William Carlos; Mazzucchi, Eduardo.
  • Danilovic, Alexandre; Universidade de São Paulo. Faculdade de Medicina. Hospital das Clínicas. SP. BR
  • Rocha, Bruno Aragão; Universidade de São Paulo. Faculdade de Medicina. SP. BR
  • Marchini, Giovanni Scala; Universidade de São Paulo. Faculdade de Medicina. Hospital das Clínicas. SP. BR
  • Traxer, Olivier; Sorbonne Université. Hôpital Tenon. Paris. FR
  • Batagello, Carlos; Universidade de São Paulo. Faculdade de Medicina. Hospital das Clínicas. SP. BR
  • Vicentini, Fabio Carvalho; Universidade de São Paulo. Faculdade de Medicina. Hospital das Clínicas. SP. BR
  • Torricelli, Fábio César Miranda; Universidade de São Paulo. Faculdade de Medicina. Hospital das Clínicas. SP. BR
  • Srougi, Miguel; Universidade de São Paulo. Faculdade de Medicina. Hospital das Clínicas. SP. BR
  • Nahas, William Carlos; Universidade de São Paulo. Faculdade de Medicina. Hospital das Clínicas. SP. BR
  • Mazzucchi, Eduardo; Universidade de São Paulo. Faculdade de Medicina. Hospital das Clínicas. SP. BR
Int. braz. j. urol ; 45(5): 948-955, Sept.-Dec. 2019. tab, graf
Article in English | LILACS | ID: biblio-1040069
ABSTRACT
ABSTRACT Objectives Measurements of stone features may vary according to the non-contrast computed tomography (NCCT) technique. Using magnified bone window is the most accurate method to measure urinary stones. Possible differences between stone measurements in different NCCT windows have not been evaluated in stones located in the kidney. The aim of this study is to compare measurements of kidney stone features between NCCT bone and soft tissue windows in patients submitted to retrograde intrarenal surgery (RIRS). Materials and Methods Preoperative and 90th postoperative day NCCT were performed in 92 consecutive symptomatic adult patients (115 renal units) with kidney stones between 5 mm to 20 mm (< 15 mm in the lower calyx) treated by RIRS. NCCT were evaluated in the magnified bone window and soft tissue window in three axes in a different time by a single radiologist blinded for the measurements of the NCCT other method. Results Stone largest size (7.92±3.81 vs. 9.13±4.08; mm), volume (435.5±472.7 vs. 683.1±665.0; mm3) and density (989.4±330.2 vs. 893.0±324.6; HU) differed between bone and soft-tissue windows, respectively (p<0.0001) 5.2% of the renal units (6/115) were reclassified from residual fragments > 2 mm on soft tissue window to 0-2 mm on bone window. Conclusion Kidney stone measurements vary according to NCCT window. Measurements in soft tissue window NCCT of stone diameter and volume are larger and stone density is lesser than in bone window. These differences may have impact on clinical decisions.
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Full text: Available Index: LILACS (Americas) Main subject: Kidney Calculi / Tomography, X-Ray Computed Type of study: Observational study / Prognostic study Limits: Adult / Humans Language: English Journal: Int. braz. j. urol Journal subject: Urology Year: 2019 Type: Article Affiliation country: Brazil / France Institution/Affiliation country: Sorbonne Université/FR / Universidade de São Paulo/BR

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Full text: Available Index: LILACS (Americas) Main subject: Kidney Calculi / Tomography, X-Ray Computed Type of study: Observational study / Prognostic study Limits: Adult / Humans Language: English Journal: Int. braz. j. urol Journal subject: Urology Year: 2019 Type: Article Affiliation country: Brazil / France Institution/Affiliation country: Sorbonne Université/FR / Universidade de São Paulo/BR