you need to ask your supervisor to contact a physician (doctor) in Infectious disease clinic for a collaboration. The doc need to apply for ethic. Then the data can be released to you.

just my personal opinion, most likely the chest X-ray of covid patient is the same with others viral pneumonia. May be you should consider CT

your chance is low.. as a student is hard to convince them.
It involve a lot of hard work. to apply the ethic need money, to dig out all related files need time.
And what is the return to occupy their precious time?

if your SV is really interested and confident, sent out invitation email to all pulmonologist and infectious disease doctor.
Target those young, and working in teaching hospital ( there are 5 in Malaysia). Most email can be found online.
You might have higher chances.