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Table 4 Crosstab of the assessment results of all (inguinal and secondary) LNs, software analysis vs. correction of computer assessment by specialists (a1 = Number of true-positive findings; b1 = Number of false-positive findings; c1 = Number of false-negative finding; d1 = Number of true-negative findings)

From: A study on the value of computer-assisted assessment for SPECT/CT-scans in sentinel lymph node diagnostics of penile cancer as well as clinical reliability and morbidity of this procedure

 

Correction of computer assessment by specialists

SLN proven

SLN disproven

Sum

Software analysis

Positive findings by software

True-positive

127

(a1)

False-positive

88

(b1)

all positive findings

215

(a1 + b1)

Negative findings by software

False-negative

16

(c1)

True-negative

572

(d1)

all negative findings

588

(c1 + d1)

Sum

all true SLN

143

(a1 + c1)

all false SLN

660

(b1 + d1)

all findings

803

(a1 + b1 + c1 + d1)