Understand the limitations of a PET scan with our detailed review. Learn what factors can affect the results and accuracy of this imaging test.
Limitations of PET scan Test
One of the major limitations of PET scanning is its limited ability to detect the very small lesions. Tumors or abnormalities smaller than approximately 5–7 mm may not accumulate enough radiotracer to be detected accurately resulting in false negative findings. Another important limitation is the possibility of false positive results. Increased uptake of radioactive tracer can occur not only in cancer but also in infections inflammation healing tissues or benign conditions. Similarly PET scans may produce false negative results in certain cancers that have low metabolic activity or in tumors with minimal FDG uptake. PET imaging also has limited anatomical detail.
Although PET identifies areas of abnormal metabolic activity it cannot precisely define the anatomical structures. For this reason PET is combined with CT or MRI to improve localization and diagnostic accuracy. The examination is relatively expensive compared with many other imaging techniques. The high cost of PET scanners, radiotracer production and specialized facilities may limit accessibility particularly in the developing regions. Patient preparation is another important consideration. Blood glucose levels should be well controlled before FDG PET imaging because high blood sugar can interfere with tracer uptake and reduce image quality. Certain patient related factors can affect image quality. Excessive movement during scanning obesity, inability to remain still or difficulty following breathing instructions may produce the blurred or inaccurate images. In addition PET scans cannot always distinguish between active disease and treatment related changes particularly soon after surgery chemotherapy or radiation therapy. Careful timing of the scan is often necessary to avoid misleading results.
Where to Book Online Tests for PET Scan in Delhi?
In Delhi there are many diagnostic centres to book the online tests for PET Scan but patients prefer Ganesh Imaging for the best results and at a very affordable price.
Which PET Scan centre is near me in Delhi?
Brain PET Scan near me in Delhi is the Ganesh Imaging. This centre provides the best results and the rates of the tests are very affordable as compared to others.
What is the PET scan price in Delhi?
Brain PET scan price in Delhi may range from INR 9000 to INR 18000. The price may vary depending on various factors like location of diagnostic centers. It is expensive because of the advanced equipment and the skilled professionals used for this test.
Why to Choose Ganesh Imaging for PET scan test in Delhi?
In Delhi patients choose Ganesh Imaging for PET scan test because this centre has the best machines that give the best results. The diagnostic centre is having very good patient service with the helpline numbers for round the clock availability.
Frequently Asked Questions (FAQ)
What is the main limitation of PET scan?
The main limitation is that it may produce false positive or false negative results.
Does a PET scan expose patients to radiation?
Yes PET scans involve small amounts of radiation from radioactive tracers and CT scans.
Why is PET scan often combined with a CT scan?
It is combined with CT to provide both functional and detailed anatomical information.
Can infections affect PET scan results?
Yes infections and inflammation can cause the increased tracer uptake and lead to false-positive results.
