Receiving a diagnosis of mesothelioma cancer often begins with a series of medical tests designed to uncover what's happening inside the body. Among the most important diagnostic tools are PET scans, CT scans, and MRI scans . Each imaging test provides a different piece of the puzzle, helping doctors detect tumors, determine how far the disease has spread, and create the most effective treatment plan. If you've recently been advised to undergo one or more of these scans, you may be wondering why each one is necessary. This guide explains how PET, CT, and MRI scans work, what they reveal, and why they play such an important role in diagnosing mesothelioma. Table of Contents Sr# Headings 1 Understanding Mesothelioma Cancer 2 Why Imaging Tests Are Important 3 What Is a CT Scan? 4 How CT Scans Help Diagnose Mesothelioma 5 What Is an MRI Scan? 6 How MRI Scans Support Diagnosis 7 What Is a PET Scan? 8 How PET Scans Detect Cancer Activity 9 Comparing PET, CT, and MRI Scans 10 Can Ima...