Evaluation of obstructed kidneys by discriminant analysis of 99mTc-MAG3 renograms.
This study sought to develop a method of improving the differential diagnostic between healthy and obstructed kidneys using only parameters derived from the 99mTc-MAG3 renogram. The analysis included data from 46 healthy and 36 obstructed kidney units. The parameters calculated were: mean transit time (MTT), time at 20% of the initial height of the renal retention function (T20) and time to peak of the renogram (TP). A discriminant analysis was carried out to obtain a discriminant function in order to differentiate between the two groups. The best results were obtained using the function: (2.5629 InT20) + (2.1280 In TP) -27.1224 which correctly classified 97.56% of the cases, giving a sensitivity of 94.44% and a specificity of 99.99%.
Laboratory of Biophysics and Bioengineering, Faculty of Medicine, University of Barcelona, Spain.
A
A
González
L
L
Jover
L I
LI
Mairal
J
J
Martin-Comin
R
R
Puchal
D000328:Adult; D003937:Diagnosis, Differential; D016002:Discriminant Analysis; D005260:Female; D006801:Humans; D007668:Kidney / Q000000981:diagnostic imaging* / Q000502:physiology / Q000503:physiopathology; D007674:Kidney Diseases / Q000000981:diagnostic imaging*; D008297:Male; D011866:Radioisotope Renography; D012016:Reference Values; D012680:Sensitivity and Specificity; D017263:Technetium Tc 99m Mertiatide; D014524:Urethral Obstruction
D017263:Technetium Tc 99m Mertiatide