放ほう射しゃ線せん科か

Meanings

1

noun

radiology department

Refers to the hospital department specializing in diagnostic imaging and radiation therapy.

department, course, section

放ほう射しゃ線せん
放射線 means 'radiation' itself, while 放射線科 is the medical department that uses radiation.
内ない科か
内科 is 'internal medicine', a different hospital department.

Compound of 放射線 (radiation) + 科 (department, field of study).