How PET CT Scans Help Track the Effectiveness of Cancer Treatment

Published on October 17, 2025

Monitoring how well cancer treatment is working is crucial for planning the next steps in a patient’s recovery journey. Among the most advanced imaging technologies available today, PET CT scans stand out for their precision and insight. At Quadra Diagnostics, we offer the best PET CT scan in Kolkata, helping doctors and patients make informed decisions with confidence. 

What Is a PET CT Scan? 

A PET CT scan combines two imaging techniques — Positron Emission Tomography (PET) and Computed Tomography (CT). While the CT scan shows detailed images of internal structures, the PET scan highlights areas of abnormal metabolic activity. When used together, they provide a comprehensive picture of how cancer is responding to treatment. 

Tracking Treatment Effectiveness 

1. Measuring Metabolic Changes: Cancer cells typically consume more glucose than normal cells. PET CT scans detect this activity, allowing doctors to assess whether cancer cells are still active after chemotherapy or radiation. 

2. Early Detection of Response: Unlike other imaging methods that only reveal structural changes, PET CT can show early biochemical responses — often before tumours shrink in size. This helps oncologists modify treatment plans sooner for better results. 

3. Evaluating Recurrence: After treatment, PET CT scans help ensure that cancer has not returned. Subtle metabolic activity can be detected even when physical symptoms are absent. 

Why Choose Quadra Diagnostics? 

At Quadra Diagnostics, we pride ourselves on offering the best PET CT scan in Kolkata, supported by advanced imaging technology and an experienced radiology team. Our focus is not only on accurate imaging but also on patient comfort and safety throughout the process. 

For patients seeking the Best Cancer Diagnosis in Kolkata, Quadra Diagnostics combines innovation with compassion — ensuring clarity, confidence, and care at every step of your cancer journey