welcome to HealthcareMagic Forum.
The X-ray shows some ill defined densities & the impression given it of Pulmonary TB.X-ray alone is not diagnostic so I hope the doctor has already done blood test
(CBC & ESR
) & also skin test called Mantoux test
.Also your girlfriend may be having low grade fever;cough;weight loss
which are symptoms of PTB .That may be the reason the doctor has started on anti-tuberculous drugs.If it is PTB she will be benefitted in a weeks time or 10 days.You can wait till then .If she is not improving after this period or she is getting worse then may be you can take a second opinion
wish her good health .