If you are talking about pulmonary sarcoidosis, I would place symptoms as the most important, breathing test as number two (maybe annually for a while), and the plain chest-x-ray (not CT scan) as the least important.
Ukuba ngaba uthetha ngesifo sokukhula kweeseli ezinokukrala kwemiphunga ndingathi beka phambili iimpawu uze ulandelise ngovavanyo lokuphefumla (mhlawumbi ulwenze kanye ngonyaka ixesha elithile), kunye novavanyo lwesifuba lwe-x-reyi (ingesiso iskeni seCT) njengovavanyo olungabalulekanga kangako.