  The new coronavirus 2019, also known as COVID19, is a very serious epidemic
that has killed thousands or even millions of people since December 2019. It
was defined as a pandemic by the world health organization in March 2020. It is
stated that this virus is usually transmitted by droplets caused by sneezing or
coughing, or by touching infected surfaces. The presence of the virus is
detected by real-time reverse transcriptase polymerase chain reaction (rRT-PCR)
tests with the help of a swab taken from the nose or throat. In addition, X-ray
and CT imaging methods are also used to support this method. Since it is known
that the accuracy sensitivity in rRT-PCR test is low, auxiliary diagnostic
methods have a very important place. Computer-aided diagnosis and detection
systems are developed especially with the help of X-ray and CT images. Studies
on the detection of COVID19 in the literature are increasing day by day. In
this study, the effect of different batch size (BH=3, 10, 20, 30, 40, and 50)
parameter values on their performance in detecting COVID19 and other classes
was investigated using data belonging to 4 different (Viral Pneumonia, COVID19,
Normal, Bacterial Pneumonia) classes. The study was carried out using a
pre-trained ResNet50 convolutional neural network. According to the obtained
results, they performed closely on the training and test data. However, it was
observed that the steady state in the test data was delayed as the batch size
value increased. The highest COVID19 detection was 95.17% for BH = 3, while the
overall accuracy value was 97.97% with BH = 20. According to the findings, it
can be said that the batch size value does not affect the overall performance
significantly, but the increase in the batch size value delays obtaining stable
results.
