Comparing Nodule Imaging: Tracking Changes Over Time - Radiology

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Nodule imaging follow-up comparison


Hello Dr.
Wang,
Thank you for your previous response.
I apologize for bothering you with one last question.
Regarding the nodule I consulted you about earlier, I would like to confirm whether this nodule was already present in the previous imaging, as I only have the images from the earlier examinations and the reports are no longer available.

Here are the comparisons of this time's imaging (the leftmost image is the most recent one, with a CT slice thickness of 3mm) with the previous two examinations done at other hospitals, which had a slice thickness of 5mm.
Could you please help me determine if the areas within the red boxes represent the same nodule? https://imgur.com/a/eBbLYci
Additionally, regarding your previous comment about the left side of the person, it should correspond to the image shown below, right? https://imgur.com/ovmM9Ow
I apologize for the inconvenience, and thank you for your help!

A-Bao, 30~39 year old female. Ask Date: 2018/07/02

Dr. Wang Yifen reply Radiology


Due to the varying angles of coronal reconstructions during each examination, the image on the far right (from the viewer's perspective) shows the left bronchus, while the image on the left does not.
Based on the images you provided, it cannot be confirmed that these are the same nodule, but it also cannot be ruled out.
A complete set of reconstructions for the entire area is necessary for confirmation.
It is best to utilize hospital computer-aided software or a medical imaging storage and transmission system for more reliable results.
I recommend consulting with a specialist at your original health check unit or a pulmonology outpatient clinic for expert advice.
Wishing you safety and success.
Sincerely, Yi-Fen Wang.

Reply Date: 2018/07/02

More Info


When interpreting imaging studies, particularly concerning nodular densities in the lungs, it's essential to understand the terminology and the implications of the findings. In your case, the X-ray report indicates "Nodular densities at LLL and LUL," which suggests that there are nodular opacities observed in the left lower lobe (LLL) and left upper lobe (LUL) of the lungs. These nodular densities could indeed represent pulmonary nodules, which are small round growths in the lung that can be benign or malignant.

The presence of nodular densities does not automatically imply that they are cancerous. Many factors influence the interpretation of these findings, including the patient's history, risk factors, and the characteristics of the nodules themselves (such as size, shape, and density). It is not uncommon for physicians to consider nodules as potentially benign, especially if they have stable characteristics over time or if the patient has a low risk of lung cancer.

Regarding your question about why a CT scan was not immediately ordered, there could be several reasons. The physician may have assessed the nodules as stable based on previous imaging or may have deemed them to be of low concern based on clinical judgment. In some cases, physicians may choose to monitor the nodules over time with follow-up imaging rather than proceeding directly to a CT scan, especially if the patient is asymptomatic and has no significant risk factors for lung cancer.

However, if there is any uncertainty or if the nodules exhibit characteristics that raise suspicion, a CT scan is a valuable tool for further evaluation. CT scans provide more detailed images of the lungs and can help determine the size, shape, and growth rate of the nodules, which are critical factors in assessing their nature.

In your follow-up question regarding the comparison of nodules over time, it is crucial to have access to previous imaging reports and images to make a comprehensive assessment. If you have images from previous scans, comparing them with the current CT scan can help determine if the nodules are new, stable, or have changed in size or appearance. The red boxes you mentioned in your images may indicate the same nodules if they appear in similar locations and have similar characteristics across the different imaging studies.

In summary, while nodular densities in the lungs can be concerning, their interpretation requires a thorough understanding of the patient's clinical context and previous imaging findings. If there is any doubt or if the nodules have changed, further imaging, such as a CT scan, may be warranted. It is always advisable to discuss these findings and any concerns with your healthcare provider, who can provide personalized recommendations based on your specific situation.

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