noun
subject; test subject; trial subject
Only when written 被験者
Refers to a person participating in a medical experiment, clinical trial, or psychological study. Often used in research contexts.
新薬の臨床試験に被験者として参加した。
I participated as a subject in a clinical trial for a new drug.
被験者の安全を最優先に考えてください。
Please prioritize the safety of the test subjects.
noun
examinee; person undergoing an examination
Used for someone undergoing a medical examination, such as a full-body scan, health checkup, or diagnostic test. Less common than the first sense.
MRI検査の被検者は、金属類を外してください。
Examinees undergoing an MRI scan should remove any metal objects.
Compound of 被 (hi, 'receive') + 験 (ken, 'test') + 者 (sha, 'person'). The alternate form 被検者 uses 検 (ken, 'examine').