Unenhanced MDCT in Suspected Urolithiasis: Improved Stone Detection and Density Measurements Using Coronal Maximum-Intensity-Projection Images

被引:3
作者
Corwin, Michael T. [1 ]
Hsu, Margaret [1 ]
McGahan, John P. [1 ]
Wilson, Machelle [2 ]
Lamba, Ramit [1 ]
机构
[1] Univ Calif Davis, Med Ctr, Dept Radiol, Sacramento, CA 95817 USA
[2] Univ Calif Davis, Dept Publ Hlth Sci, Davis, CA 95616 USA
基金
美国国家卫生研究院;
关键词
maximum intensity projection; MDCT; nephrolithiasis; renal stones; urolithiasis; URINARY CALCULI; COMPUTERIZED-TOMOGRAPHY; HELICAL CT; MANAGEMENT; REFORMATIONS; DISEASE;
D O I
10.2214/AJR.12.10389
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
OBJECTIVE. The purpose of this study was to determine whether coronal maximum-intensity-projection (MIP) reformations improve urinary tract stone detection and density measurements compared with routine axial and coronal images. MATERIALS AND METHODS. Forty-five consecutive patients who underwent MDCT for suspected urolithiasis were included. Two radiologists independently determined the number of stones on 5-, 3-, and 1.25-mm axial, 5- and 3-mm coronal, and 5-mm coronal MIP images. The reference standard was obtained by consensus review using all six datasets. Stone density was determined for all calculi 4 mm or larger on all datasets. RESULTS. There were a total of 115 stones. Reader 1 identified 111 (96.5%), 112 (97.4%), 97 (84.3%), 102 (88.7%), 99 (86.1%), and 85 (73.9%) stones and reader 2 identified 105 (91.3%), 102 (88.7%), 85 (73.9%), 89 (77.4%), 89 (77.4%), and 76 (66.1%) stones on the MIP, 1.25-mm axial, 3-mm axial, 3-mm coronal, 5-mm coronal, and 5-mm axial images, respectively. Both readers identified more stones on the MIP images than on the 3- or 5-mm axial or coronal images (p < 0.0001). The mean difference in stone attenuation compared with the thin axial images was significantly less for the MIP images (44.6 HU) compared with 3-mm axial (235 HU), 3-mm coronal (309 HU), and 5-mm coronal (329.6 HU) or axial images (347.8 HU) (p < 0.0001). CONCLUSION. Coronal MIP reformations allow more accurate identification and density measurements of urinary tract stones compared with routine axial and coronal reformations.
引用
收藏
页码:1036 / 1040
页数:5
相关论文
共 19 条
[1]  
[Anonymous], 2004, EUROPEAN GUIDELINES
[2]   The value of unenhanced helical computerized tomography in the management of acute flank pain [J].
Dalrymple, NC ;
Verga, M ;
Anderson, KR ;
Bove, P ;
Covey, AM ;
Rosenfield, AT ;
Smith, RC .
JOURNAL OF UROLOGY, 1998, 159 (03) :735-740
[3]  
Dobbins JillM., 1997, Emergency Radiology, V4, P303
[4]   Nephrolithiasis: What Surgeons Need to Know [J].
Eisner, Brian H. ;
McQuaid, Joseph W. ;
Hyams, Elias ;
Matlaga, Brian R. .
AMERICAN JOURNAL OF ROENTGENOLOGY, 2011, 196 (06) :1274-1278
[5]   A prospective multivariate analysis of factors predicting stone disintegration by extracorporeal shock wave lithotripsy: The value of high-resolution noncontrast computed tomography [J].
El-Nahas, Ahmed R. ;
El-Assmy, Ahmed M. ;
Mansour, Osama ;
Sheir, Khaled Z. .
EUROPEAN UROLOGY, 2007, 51 (06) :1688-1694
[6]  
Fritzsche P, 2000, Radiology, V215 Suppl, P683
[7]   New and Evolving Concepts in the Imaging and Management of Urolithiasis: Urologists' Perspective [J].
Kambadakone, Avinash R. ;
Eisner, Brian H. ;
Catalano, Onofrio Antonio ;
Sahani, Dushyant V. .
RADIOGRAPHICS, 2010, 30 (03) :603-623
[8]   Urinary calculi: improved detection and characterization with thin-slice multidetector CT [J].
Ketelslegers, E ;
Van Beers, BE .
EUROPEAN RADIOLOGY, 2006, 16 (01) :161-165
[9]   Value of automated coronal reformations from 64-section multidetector row computerized tomography in the diagnosis of urinary stone disease [J].
Lin, Wen-Chiung ;
Uppot, Raul N. ;
Li, Chao-Shiang ;
Hahn, Peter F. ;
Sahani, Dushyant V. .
JOURNAL OF UROLOGY, 2007, 178 (03) :907-911
[10]   Preoperative Stone Attenuation Value Predicts Success After Shock Wave Lithotripsy in Children [J].
McAdams, Sean ;
Kim, Nicholas ;
Dajusta, Daniel ;
Monga, Manoj ;
Ravish, Indupur R. ;
Nerli, Rajendra ;
Baker, Linda ;
Shukla, Aseem R. .
JOURNAL OF UROLOGY, 2010, 184 (04) :1804-1808