We often encounter patients or family members who do not have any information with them, and after taking a medical history, we initially determine that there may be some problems in some part of the brain. But some patients or family members will say that they have done it before and it is normal. So what is the situation? Since the patient and family did not bring the film, or the film they brought is not abnormal. However, this does not necessarily mean that there is no problem. Some patients with epilepsy have very mild and hidden lesions on the MRI, which require us to scan special sequences and to scan at a thinner level, so that we may find minor lesions that are not detected on the normal MRI. Sometimes computerized data post-processing techniques are required to detect very subtle lesions. If this type of epilepsy is confirmed to be indeed caused by such minor lesions, the chances of surgical cure are very good because the lesions are so minor and limited that only a very small area needs to be removed to achieve good epilepsy control. This is why it is essential to have an epilepsy-specific MRI scan beforehand, as it may reveal a minor lesion and resolve the epilepsy that has plagued the patient for so long.