Why Bring CT Images to a Pulmonologist for ILD Review?

When you are being evaluated for an interstitial lung disease (ILD), your pulmonologist will need to see the actual image files from your High-Resolution CT (HRCT) scan, not just the written radiology report. Depending on the clinic’s system, you may be asked to bring a physical CD (often called a DICOM disc) to your appointment, or the clinic may request that the imaging center transfer the files electronically.

While a written report provides a helpful overview, ILDs are highly complex. Specialists rely on the original digital image files to evaluate the specific pattern of scarring in your lungs and review them collaboratively with a specialized team to determine the most accurate diagnosis ^[1].

How to Make Sure Your Doctor Has the Images

Before your appointment, you should:

• Check the preferred method: Call your pulmonologist’s office to ask if they can access your scan electronically or if you need to bring a physical disc.
• Request the complete study: If you need a disc, ask the imaging center for the complete original CT study in DICOM format, along with the written report.
• Gather older scans: If you have had chest CT scans in the past, request those images as well. Comparing old and new scans helps specialists see how your lungs have changed over time.

If you cannot get the images yourself, contact your pulmonologist’s office. Their staff can often request the files directly from the imaging center so your review is not delayed.

The Limits of a Written Radiology Report

When you get a CT scan at a local imaging center, the radiologist who interprets the scan writes a summary report. Interpreting ILD patterns is notoriously difficult, and studies show that different doctors can look at the same scan and disagree on the specific patterns they see ^[2][3].

Relying only on a written summary can sometimes be confusing. For example, a report might label your lung scarring as “indeterminate” (meaning the radiologist is not fully confident in a specific pattern) or state that it shows honeycombing (a pattern of cystic spaces in the lungs that looks like a bee’s honeycomb). While honeycombing is often associated with Idiopathic Pulmonary Fibrosis (IPF), it is not a specific disease itself ^[4]. Similar patterns can be seen in other conditions, such as fibrotic hypersensitivity pneumonitis or connective-tissue-disease-associated fibrosis ^[5][6]. To know what is most likely causing your scarring, an ILD specialist needs to look at the images directly and combine that visual information with your symptoms, exposure history, and breathing tests.

The Power of the Original DICOM Files

The image files provided by the imaging center are saved in a standard format known as DICOM. Having these original digital files allows specialized thoracic radiologists (experts in lung imaging) to interact with the scan in ways that a printed report or flat picture cannot match. Having the digital files allows specialists to:

• Confirm scan quality: The specialist can verify that the scan was performed using the correct high-resolution, thin-slice techniques required to properly evaluate ILD ^[7].
• Examine fine details: Doctors can manipulate the image layers to look closely at small structural features, such as nodules or traction bronchiectasis (airways that have been stretched open by surrounding scar tissue) ^[6][8].
• Analyze scarring patterns: The difference between two ILDs often comes down to exactly where the scarring is located. Specialists need to trace the distribution of the damage (whether it is mostly at the top or bottom of the lungs, or along the edges versus the center) to accurately narrow down the diagnosis ^[5][6].

The Multidisciplinary Discussion (MDD)

At specialized ILD centers, diagnosis is often a team effort. Your case may be reviewed in a Multidisciplinary Discussion (MDD)—a collaborative meeting where pulmonologists, specialized thoracic radiologists, and sometimes pathologists review your information together ^[9].

During this meeting, the thoracic radiologist will display the image files from your scan. The team will combine the exact visual evidence with your clinical history, autoimmune symptoms, and pulmonary function tests to reach a consensus ^[1][10]. If the actual images are not available, this collaborative review may be delayed, or the team may need to request a repeat scan to safely confirm your diagnosis.

You do not need to interpret the images yourself; your role is simply to ensure your care team has all the records they need to guide your care.