  In this work, we explore various neural network architectures using Magnetic
Resonance (MR) T1 images of the brain to identify Parkinson's Disease (PD),
which is one of the most common neurodegenerative and movement disorders. We
propose three ensemble architectures combining some winning Convolutional
Neural Network models of ImageNet Large Scale Visual Recognition Challenge
(ILSVRC). All of our proposed architectures outperform existing approaches to
detect PD from MR images, achieving upto 95\% detection accuracy. We also find
that when we construct our ensemble architecture using models pretrained on the
ImageNet dataset unrelated to PD, the detection performance is significantly
better compared to models without any prior training. Our finding suggests a
promising direction when no or insufficient training data is available.
