Artificial Intelligence can Improve Brain Tumor Diagnosis

Novel machine learning approach classifies the grade of glioma more accurately and in a non-invasive manner, which can improve the brain tumor diagnosis. The findings of the study are published in the journal IEEE Access.

A new machine learning approach classifies a common type of brain tumor into low or high grades with almost 98% accuracy, researchers report. Scientists in India and Japan, including from Kyoto University's Institute for Integrated Cell-Material Sciences (iCeMS), developed the method to help clinicians choose the most effective treatment strategy for individual patients.

‘Brain tumors are the most prominent neurologically malignant cancers with the highest injury and death rates worldwide. Glioma classification is crucial for the diagnosis, assessment, and the planning of clinical guidelines before surgery. ’

Gliomas are a common type of brain tumor affecting glial cells, which provide support and insulation for neurons. Patient treatment varies depending on the tumor's aggressiveness, so it's important to get the diagnosis right for each individual. Radiologists obtain a very large amount of data from MRI scans to reconstruct a 3D image of the scanned tissue. Much of the data available in MRI scans cannot be detected by the naked eye, such as details related to the tumor shape, texture, or the image's intensity. Artificial intelligence (AI ) algorithms help extract this data. Medical oncologists have been using this approach, called radiomics, to improve patient diagnoses, but accuracy still needs to be enhanced.

iCeMS bioengineer Ganesh Pandian Namasivayam collaborated with Indian data scientist Balasubramanian Raman from Roorkee to develop a machine learning approach that can classify gliomas into low or high grade with 97.54% accuracy. Low-grade gliomas include grade I pilocytic astrocytoma and grade II low-grade glioma. These are the less aggressive and less malignant of the glioma tumors. High-grade gliomas include grade III malignant glioma and grade IV glioblastoma multiforme, which are much more aggressive and more malignant with a relatively short post-diagnosis survival time. The choice of patient treatment largely depends on being able to determine the glioma's grading.

The team, including Rahul Kumar, Ankur Gupta, and Harkirat Singh Arora, used a dataset from MRI scans belonging to 210 people with high-grade gliomas and another 75 with low-grade gliomas. They developed an approach called CGHF, which stands for: a computational decision support system for glioma classification using hybrid radionics and stationary wavelet-based features. They chose specific algorithms for extracting features from some of the MRI scans and then trained another predictive algorithm to process this data and classify the gliomas. They then tested their model on the rest of the MRI scans to assess its accuracy.

"Our method outperformed other state-of-the-art approaches for predicting glioma grades from brain MRI scans," says Balasubramanian. "This is quite considerable."

"We hope AI helps develop a semi-automatic or automatic machine predictive software model that can help doctors, radiologists, and other medical practitioners tailor the best approaches for their individual patients," adds Ganesh.

Source: Eurekalert