pet-ct scan

PET-CT Location
The PET-CT Centre is located at Gandhi Nagar, Adyar, at the Cancer Institute Premises. It is 15km away from Central Railway Station, 18km from Koyembedu General Bus Stand.It is 12km from Meenambakkam Airport.

Positron Emission Tomography, commonly known as PET- CT scan is a versatile diagnostic modality with high diagnostic accuracy and precision. Flurodeoxy glucose (FDG18) isotope, the radioactive source is injected intravenously into the patient. The molecules of the isotope are accumulated in various tissues of the body. The accumulation depends on glucose utility in the cell and physiological state of the tissue (as it is glucose which is the energy currency of the body). By detecting the gamma rays emitted of the radioactively degenerating FDG18, one could differentiate normal and abnormal tissue pathology and function. When combining PET Scan with CT scan images (i.e. fusion scanning) one could precisely elucidate and correlate physiological with anatomical information; thereby giving a functional insight into the structure. PET-CT has numerous clinical applications in not only in oncology but in areas such as cardiology and neurology etc. Some of its many applications include cancer detection, cancer staging, planning radiotherapy, cardiac perfusion imaging. neurological imaging (it is the most efficient lie-detector known to modern science!), monitoring therapy. It also has applications such as finding the primary tumour, as a surrogate to biopsy in areas of the body inaccessible to biopsy, to detect and study metastatic tumours and early detection & monitoring of the cancer treatment

Why cancer Institute was chosen for PET CT:
Cancer Institute was the first comprehensive cancer centre in South India, the first centre to install a cobalt 60 Teletherapy unit in Asia, first centre in India to establish a department of Nuclear Medical Oncology, first to introduce the technique of Mammography in India, first Linear Accelerator in India, Blood component therapy using the blood cell separator in the supportive treatment of high dose Chemotherapy was introduced into India for the first time. As Cancer Institute has stood first in introducing various specialties in many areas, I felt installation of PET CT at Cancer Institute would be an ideal one because PET CT is the only one of its kind in Tamilnadu.

There are various other reasons which motivated me to install PET CT at the Cancer Institute – At cancer institute there is no disparity between rich and poor; want to treat ailment on humanitarian basis and not on their social status; the working personnel irrespective of their qualification and placement are trained with only one motive – to serve with smile.

Dr.Kamakshi Memorial Hospital is committed to quality in all its endeavors. The guiding principle of the hospital is to offer the latest in the health care facilities on par with international standards and to also make them accessible to patients. To meet the demands of quality health care, the hospital takes the services of several talented and dedicated medical professionals. The hospital is one of its kind with various super specialties under one roof.

What is PET?
A powerful, non—invase diagnostic tool, positron emission tomography detects biochemical changes in body tissues. Virtually all diseases alter the body’s biochemical processes. By detecting these changes, PET can provide diagnostic answers that cannot be reached using other imaging techniques. For example, CT and MRI reveal structural changes in the body Before such structural changes take place, PET has the capability to identify the early biochemical markers of disease.

What is PET/CT?
A dual purpose imaging device. PET/ CT is literally the combination of PET (position emission tomography) and CT (computed tomography) imaging techniques within a single machine. The individual scans, which are taken concurrently, can be presented separately or as a single overlapping, or “fused” image. The two techniques present different types of information about the human body; PET shows metabolic or chemical activity in the body. CT shows the body’s anatomical structures. Taking the two scans concurrently ensures that the patient remains in place and, therefore that the two images form a precise computer overlay-that the tumor “hot spot” on the PET scan corresponds directly to the physical mass on the CT scan. This fused image provides a more reliable alternative to the traditional side by-side visual comparison of PET and CT images.

How Does PET / CT Work ?
Before undergoing a PET Scan, patients receive an injection of a tracer, an imaging agent which the body easily absorbs and eliminates. The patient lies on a table that slides slowly through the scanner, which covers only a small portion of the body at a given time. By detecting the tracer in the patient, the PET scanner can create a color—coded image of the body’s chemical function. PET scans typically take about one half hour (cardiac cases take longer) and expose patients to a safe level of radiation. Most patients can return to their normal activities immediately following the scan. Specially trained radiologists and Nuclear Medicine Physicians read the PET scans and write detailed reports explaining their findings. The referring physician then reviews those findings with the patient

How Does PET Technology Help?
PET helps physicians to improve the accuracy of a diagnosis, create an individualized treatment plan,and closely monitor a patient’s progress by providing:

  • More detailed diagnostic information than other imaging techniques
  • Shorter timeframe to reach a definite diagnosis—resulting in fewer invasive diagnostic procedures and fewer unwanted surgeries
  • Precise staging of disease, including early identification of recurrences

Left: PET scan of the body. The darker regions correspondent to areas with higher metabolic activity. A tumor of the left breast is visible, as well as normal physiologic activity elsewhere in the body.
Right:PET scan of anormal brain. Red corresponds to the highest metabolic activity. In this case, the visual cortex is highlighted because the patient’s eyes were open when the tracer was administered.


What Are the Benefits of PET/CT ?
In addition to its diagnostic benefits. PET/CT has the potential to substantially impact treatment plans for cancer patients. Radiation oncologists can use PET/CT’S combined information about metabolic activity and anatomical location to better tailor radiadon fields reaching all the cancer cells, while avoiding damage to the surrounding healthy tissue.

Surgeons can use PET/CT to pinpoint exactly where to perform a biopsy or surgical excision.The CT image (above left) shows a mass in the left lung. The combined PET/CT image (above right) reveals the metabolic activity of that mass, as well as its precise location in the lung. The fused image can help physicians with diagnosing and staging the disease, as well as tailoring the treatment plan.

Who Should Have a PET/CT Scan?
PET/CT fusion imaging is most valuable for lung cancer and cancers located in region of the body that have a complicated anatomy, such as the neck and lower pelvis. These areas of the body contain organs, tissue, muscles, bones, lymph nodes, air, fluids, etc., all in close proximity-making the precise overlay of PET and CT particularly helpful. Similarly, PET/CT can aid in multifocal diseases, such as lymphoma, by providing more exact locations for biopsies and surgery.

Getting Your Results
PET Center offers the latest in digital imaging , and offers the scans in the form of CD. In addition image hard copy in the form of paper printout and Hlm format.PET and PET/CT Scan Instructions

General Patient Preparations

  • Do not wear clothing or jewellery that contains metal. Do not wear clothing or jewellery that contains metal.
  • Take all prescribed medications on the day of your scan unless otherwise instructed
  • No exercise or alcohol for 24 hours prior to the scan
  • Please bring any related CT or MRI films
  • Let us know if you are pregnant or breast feeding
  • Do not bring children or pregnant women with you
  • Plan to be at the PET Center for approximately 3 hours.

Patients having a PET/CT scan should have nothing to eat or drink after midnight for a morning scan, or water only in the morning for an afternoon scan. The PET Center will provide additional instructions if your scan requires an oral contrast.Panents having a PET scan should drink several glasses of water on the day of the scan. Diabetic patients will receive specific instructions from the PET Centre.

Who Should Have a PET Scan?
ON COLOGY PATIENTS An essential diagnostic technique for cancer patients, PET can help delineate cancer findings alter treatment plans, and sometimes help patients avoid unnecessary surgeries.Oncology PET is used to

  • Diagnose suspected cancer
  • Stage (determine the extent of) tumors before and after treatment
  • Detect recurrences of cancer
  • Evaluate a patients response to therapy

For pediatric oncology patients, PET particularly aids in the diagnosis of Hodgl in`s disease and Lymphoma.

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