I'm trying to get the dcm4chee dicom from pacsdb database, some say it's in the instance table in the inst_attrs column which is a blob and I've been converting it to base64 to get the DICOM, but I have doubts if it's inst_attrs is the column.
I'm sorry for my English
You can extract some of the DICOM attributes from the DB, like the bit allocated DICOM attribute (How DCM4CHEE stores the bits allocation information of DICOM image), but the actual image data (from which you could make a JPG or PNG) is stored on the file system.
The location on the system can be looked up in the DB, but I don't believe the actual pixel data is stored in the DB.