Written By: Dr. Preeti Singh
Consultant - Nuclear Medicine PET/CT
Sohana Hospital, Mohali.
Experience: 12+ Years
Published: 6 August 2025
Last Updated: 6 August 2025
In the world of modern diagnostic imaging, PET CT scans has become a revolutionary tool for detecting, staging and monitoring various types of cancer, as well as certain neurological and cardiac conditions. But while this powerful imaging technique offers detailed and highly accurate information, it also raises an important question for many patients and caregivers, which is, ‘How often should a PET CT scan be done?
At Sohana Hospital we believe in patient centric care, enabling the patients themselves to make informed decisions about your health with respect to PET CT scan in Mohali.
What is a PET CT Scan?
A PET CT scan near me is a combination of two imaging technologies in one session. The CT scan provides detailed images of internal organs, while the PET scan reveals how tissues and organs are functioning using a small amount of radioactive tracer.
A PET CT Scan is useful in the following cases:
Cancer diagnosis and staging
Assessment of response to treatment
Detecting recurrence of cancer
Evaluating brain disorders (like Alzheimer’s and Epilepsy)
Assessing heart function and damage
Parkinson’s Disease
Myocardial Viability
Fevers of Unknown Origin
Cancers that need specialized tracers such as FDG, DOTA, PSMA
So, How Often Should You Get a PET-CT?
There is no one-size-fits-all answer. The frequency of PET-CT scans depends on several factors, including:
Type of Disease
Cancer Patients
Patients undergoing cancer treatment may be recommend to get PET CT scans at various stages before during treatment and after treatment to detect recurrence, monitor progress and effect of ongoing treatment.
For patients dealing with neurological conditions, a PET CT scan may be used once during diagnosis or as needed if symptoms progress.
For patients with cardiac abnormalities, frequency of PET CT scan depends on the condition and whether doctors need to assess ongoing damage or viability of heart tissue.
Stage of Treatment or Recovery
In active treatment, scans might be done every few months to monitor effectiveness.
In remission pet CT scan in Chandigarh may be scheduled once a year or only if symptoms suggest recurrence.
Clinical Opinion
Your medical team will recommend scans based on:
Changes in symptoms
Blood test results (e.g., tumor markers)
Physical exam findings
Prior scan results
Is There a Risk from Frequent PET CT Scans?
PET CT scans involve exposure to radiation, both from the CT scan and the radioactive tracer used in the PET component. While the risk from a single scan is low, repeated exposure to this radiation over time can be harmful especially in younger patients. At Sohana Hospital’s pet CT scan in Chandigarh we follow internationally accepted guidelines and use the lowest effective dose of radiation to ensure patient safety. Our imaging team works closely with cancer specialists to determine the right timing and necessity of every scan. If you’re unsure whether you need a PET scan near me, schedule a consultation with our nuclear medicine specialists.
How Frequently Should You Get a PET CT Scan?
Scans are often performed every few months to know how treatments are reacting with the body, and the disease. Key Factors That Determine Timing include Type and Stage of Disease, Radiation Safety and Justification and Alternative Guidelines that can help detect a disease better.
What is the next step after a PET scan?
The next step for a PET scan depends upon the results of the test, often a PET scan is followed by a number of tests followed by biopsies, and other tests. Immediate Home Care includes drinking extra water and emptying your bladder to flush out the tracer. A specialist reviews the images and writes a formal report.
Do cancerous lymph nodes show up on a PET scan?
Yes, cancerous lymph nodes generally show up on a PET scan as bright hot spots because cancer cells absorb more of the radioactive sugar tracer than normal cells. Limitations like Infections and Inflammation Can Look Like Cancer, Small or Slow-Growing Cancers Might Be Missed, A biopsy can help you and the oncologist to understand what the real problem is, and how it can be treated.
What is the recommended time gap between two PET scans?
There is no universal, fixed time gap between two PET scans, the timing gap depends upon Post-Treatment Timing, medical condition, the specific disease being tracked, and recent medications. Key Factors That Determine the Gap include previous treatments, Interim Monitoring, Routine Surveillance, and New or Urgent Symptoms.
Is a PET scan better than an MRI?
Both PET scan and MRI have their own purposes, and set different types of targets. A PET scan is usually used to understand how your cells and organs function, whereas MRI shows the structure of your body. Your cancer specialist will tell you what test you need for the detection of the disease.
Medically Reviewed By: Dr. Preeti Singh
Sohana Hospital, Mohali.
Credentials of the Reviewer:
-DM Nuclear Medicine PET/CT
-12+ Years of Clinical Experience
Nuclear Medicine & PET CT
SOHANA HOSPITAL