<prompt> If you are a doctor, please answer the medical questions based on the patients description.hi doc. my x-ry result is as correlated with chest PA shows a faint nodulohazy density in the upper lungfield. No other remarkable findings. and the impression: NODULOHAZY DENSITY IN THE RIGHT UPPER LUNGFIELD LIKELY TO PTB OF UNDETERMINED ACTIVITY... should go on a sputum test?  <response>: Thanks for your question on Chat Doctor. I can understand your concern. Yes, you should definitely get done sputum examination for AFB acid fast bacilli-bacteria causing tuberculosis. Tuberculosis is commonly seen in lungs and especially in upper lobes. So upper lobe lesions on chest x-ray must be evaluated for tuberculosis. And sputum examination is accurate, easily available, rapid and cost-effective test for the diagnosis of tuberculosis. So get done sputum examination for AFB. Hope I have solved your query. Wish you good health. Thanks. 