Measurement of transient neurotransmitter response (TNR), such as stimulus-related dopamine release, from dynamic positron emission tomography (PET) images typically suffers from limited detection sensitivity and/or high false positive rates. In this work, we perform voxel-level TNR detection using artificial neural networks (ANN), and compare their performance to previously used standard statistical tests. We use acquired and simulated [ 11 C]raclopride (a D2 receptor antagonist) human data to train and test different ANN architectures for the task of dopamine release detection. A distinguishing feature of our approach is the use of "personalized" ANNs that are designed to operate on the dynamic image from a specific subject and scan. Training of personalized ANNs was performed using simulated data that have been matched with an acquired image in terms of the signal and noise. In our tests of TNR detection performance, the F-test of the linear parametric neurotransmitter PET (lp-ntPET) model fit residuals was used as the reference method. For a moderate TNR magnitude, the areas under the receiver operating characteristic curves were 0.77-0.79 for the best ANNs and 0.64 for the F-test. At a fixed false positive rate of 0.01, the true positive rates were 0.8-0.9 for the ANNs and 0.6 for the F-test. When applied to a real image, the ANNs identified an additional TNR cluster compared to the F-test. These results demonstrate that personalized ANNs may offer a greater detection sensitivity of dopamine release and other types of TNR compared to previously used methods.