In what diameter size a lung nodule in CT scan is considered malignant nodule, for example in luna16 dataset there is annotation file called 'annotations.csv' that contains a nodule diameter, if I want to use this file for classification purpose based on diameter size, what is the range of diameter size that I can choose it as malignant nodule. kindly give me your answer based on a knowledge or a reference?
Diameter as a single parameter has a poor predictability of malignancy in lung nodules. For more information, see the Fleischner Society Pulmonary Nodule Follow-Up Guidelines and Recommendations: https://radiology-universe.org/2017_Fleischner_Society_Pulmonary_Nodule_Follow-Up_New_Guidelines_Recommendations/
This entirely depends if this is a solitary pulon module (SPN) or if it is a new finding in a patient with malignancy. For the latter, suspicion for malignancy should be super high, I would be extremely vigilant and recommend a 3 month followup regardless of size. Please refer to the Fleishcner Society for the former.
Fleichner recommendations are the way to go. FDG PET is very helpful in SPN if size is more than 8 mm
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