Hi,
Welcome to icliniq.com.
Sad to know that you suffered from COVID pneumonia. I hope you are better now and discharged from the hospital. I would have been in a better position had you sent your HRCT-chest images. Nonetheless, I will try to explain the report you have provided in a simplified way as per your demand.
HRCT is basically a high-resolution computed tomography scan of your chest in which very thin (1.25 mm) slices of your lung tissue are analyzed.
As per your report (attachments removed to protect the patient's identity), the heart size is within normal limits.
The space between both lungs is called the mediastinum. For the convenience of study, it is divided into the superior, middle, and inferior mediastinum. The superior part contains few nerves, blood vessels, and respiratory structures. Your report mentions some small metallic structures present there, abbreviated as BB. It could be a small metallic clip after a biopsy or some procedure. Have you undergone any operation or procedure before? If yes, please provide details.
I am coming on to your main concern.
Pneumonia is the solidification of the normal air-containing lung tissue. As pneumonia resolves and lungs heal, the solidification gets liquefied and appears net-like. Reticular means net-like. During this liquefaction process (resolution ), the material also forms tiny droplets, which appear on HRCT as a net-like structure with tiny nodules. This is called reticular nodularity. In contrast, a solitary lung nodule is a different identity in itself, which can be due to a variety of causes.
Residual word in your reports means that it is resolving. The base of the lungs are usually the last to resolve. So you need not worry. You are getting better. Just relax.
I hope and I am sure you will be fit and fine soon.