TY - JOUR
T1 - Spiral CT in the evaluation of flank pain
T2 - Overall accuracy and feature analysis
AU - Fielding, Julia R.
AU - Fox, Lee A.
AU - Heller, Howard
AU - Seltzer, Steven E.
AU - Tempany, Clare M.
AU - Silverman, Stuart G.
AU - Steele, Graeme
PY - 1997
Y1 - 1997
N2 - Purpose: Our goal was to assess test reliability and identify those features that have the strongest positive and negative predictive values in the diagnosis of renal colic using spiral CT. Method: Fifty non-contrast- enhanced CT scans (5 mm slice thickness) obtained in patients presenting with flank pain were reviewed by three radiologists blinded to the final diagnoses. The sensitivity, specificity, and positive and negative predictive values for nine pertinent findings were determined as compared to clinical follow-up. Results: Twenty-nine cases had findings of ureteral obstruction. Findings with the strongest positive predictive values (>0.90) were ureteral stone, hydronephrosis, hydroureter, periureteral stranding, and ureterovesical junction edema. Findings with the strongest negative predictive values (>0.89) were absence of hydronephrosis and hydroureter. The areas under the receiver operating curves for Readers 1, 2, and 3 were 0.970 ± 0.030. 0.942 ± 0.036, and 0.982 ± 0.020. Conclusion: Absence of hydroureter and hydronephrosis on spiral CT images should prompt a search for a diagnosis other than an obstructing ureteral stone.
AB - Purpose: Our goal was to assess test reliability and identify those features that have the strongest positive and negative predictive values in the diagnosis of renal colic using spiral CT. Method: Fifty non-contrast- enhanced CT scans (5 mm slice thickness) obtained in patients presenting with flank pain were reviewed by three radiologists blinded to the final diagnoses. The sensitivity, specificity, and positive and negative predictive values for nine pertinent findings were determined as compared to clinical follow-up. Results: Twenty-nine cases had findings of ureteral obstruction. Findings with the strongest positive predictive values (>0.90) were ureteral stone, hydronephrosis, hydroureter, periureteral stranding, and ureterovesical junction edema. Findings with the strongest negative predictive values (>0.89) were absence of hydronephrosis and hydroureter. The areas under the receiver operating curves for Readers 1, 2, and 3 were 0.970 ± 0.030. 0.942 ± 0.036, and 0.982 ± 0.020. Conclusion: Absence of hydroureter and hydronephrosis on spiral CT images should prompt a search for a diagnosis other than an obstructing ureteral stone.
KW - Computed tomography, spiral
KW - Kidneys, diseases
KW - Ureter, obstruction
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U2 - 10.1097/00004728-199707000-00022
DO - 10.1097/00004728-199707000-00022
M3 - Article
C2 - 9216774
AN - SCOPUS:0030862948
SN - 0363-8715
VL - 21
SP - 635
EP - 638
JO - Journal of computer assisted tomography
JF - Journal of computer assisted tomography
IS - 4
ER -