MRI and PET CT scan are both radio-diagnostic tests, which are non invasive used to look for various abnormal conditions in the body.
Overview
MRI and PET CT scan are both radio-diagnostic tests, which are non invasive used to look for various abnormal conditions in the body. The working principle of MRI and PET CT scan in different from one another. MRI uses magnetic waves for the detection of abnormalities and PET CT uses radioactive tracer for the detection of abnormalities in the body.
How MRI Works
MRI is the short form of Magnetic Resonance Imagining that uses magnetic waves for the detection of abnormalities in the body. MRI is effective in detecting fracture, injury, tumor, cancer and other conditions of the body. There are various types of MRI each used for specific part of the body with different cost. MRI creates detailed images which is effective in detecting the cancer or any other abnormality more easily.
How PET CT Works
A PET CT scan is short form of Positron Emission Tomography (PET) and Computed Tomography (CT). Computed tomography is used to create detailed images of the scan after using radioactive tracer for the detection of abnormalities. It is important to know the patient history before going for PET CT scan because PET CT tracer has allergies with some patients.
Key Differences between MRI and PET CT scan
|
S. No. |
Feature |
MRI Scan |
PET CT Scan |
|
1. |
Type of Information |
Shows detailed Structure |
Shows Biological Activity |
|
2. |
Radiation Exposure |
No radiation exposure |
Radiation exposure |
|
3. |
Best Case Uses |
Soft Tissues |
Cancers, Heart diseases, Neurological abnormalities |
|
4. |
Contrast Material |
Gadolinium |
FDG Glucose |
|
5. |
Scanning Time |
30 to 60 Minutes |
90 to 120 minutes |
Advantages of MRI
- No ionizing radiation
- Superior soft tissue detail
- Good for early diagnosis of neurological and musculoskeletal disorders
- Multiple imaging techniques like functional MRI for brain activity
Advantages of PET CT
- Shows real-time function and metabolism
- Excellent for cancer staging and treatment follow-up
- Detects disease even before structural changes appear
Click to Book MRI or PET CT scan online.
- MRI Screening Cervical Spine (Book Now)
- MRI Face & Neck (Book Now)
- MRI Centre Lower Abdomen (Book Now)
- MRI Heart (Book Now)
- MRI Knee Screening (Book Now)
- MRI Screening of Brain (Book Now)
Click Here to any type of MRI scan
PET CT scans
- PET CT scan (Book Now)
- PSMA PET CT scan (Book Now)
- Brain PET CT scan (Book Now)
- F-18 Choline PET Scan (Book Now)
- Cardiac PET CT scan (Book Now)
- FDG-PET scan (Book Now)
- DOTA PET CT scan (Book Now)
Click Here for the list of all Types of PET CT scan
Conclusion
MRI and PET CT are both valuable tools but are used for different purposes. MRI focuses on detailed structural imaging without radiation, while PET CT highlights metabolic activity and is crucial in cancer care. Doctors choose the right scan based on the patient’s symptoms and the medical question they need to answer.
Frequently Asked Questions
1. Which scan is more accurate?
Both are accurate, but for different things. MRI is better for soft tissue structure. PET CT is better for detecting cancer and metabolic activity.
2. Is PET CT safe?
Radiation is involved, but the amount is controlled and typically considered safe when medically necessary.
3. Can PET CT and MRI be used together?
Yes, in some cases both scans are done for a complete picture of disease.
4. Is PET CT painful?
The scan itself is painless, but an injection is required for the tracer.
5. Do I need to prepare for these scans?
MRI may require avoiding metal. PET CT usually needs fasting for a few hours before the test.
