PET CT Scanner Machine: Definition, Types, Features, Prices, and Financing Options in India

Explore PET CT scanner types, features, uses, prices, and financing options. Compare with CT and MRI machines.
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3 min
24 February 2026

PET-CT scanners are an important development in medical imaging. They combine two types of imaging to give clear and detailed 3D information about the body.

This guide explains what PET-CT machines are, how they work, their main types, features, and key parts. It also describes how they are used to detect cancer, check heart and brain problems, and monitor treatment progress.

Readers will understand the benefits of PET-CT scanners, important points to consider before buying one, their price in India, and available finance options. This will help doctors, hospitals, and diagnostic centres make better decisions to improve accurate diagnosis and patient care.

What is a PET CT scanner machine?

A PET-CT scanner is a combined medical imaging machine that joins Positron Emission Tomography (PET) and Computed Tomography (CT) in one system. It produces clear, high-quality 3D images that show both how the body is working and its physical structure.

The PET part uses a small amount of radioactive tracer to detect activity at the cell level. The CT part shows detailed images of the body’s internal structures. Together, they help doctors find, stage, and monitor cancer, and also check heart and brain conditions.

In hospitals and diagnostic centres, advanced imaging systems like PET-CT scanners are often supported by other life-saving devices such as an AED defibrillator, which is used to give immediate treatment during sudden cardiac arrest.

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How does PET scan machine work

A PET scan shows how cells in the body are working by tracking a small amount of radioactive tracer (such as FDG) injected into the bloodstream. Cancer cells are more active than normal cells, so they absorb more of this tracer. This creates bright areas, called “hot spots”, on the scan.

The Imaging Process:

  • Annihilation reaction: The tracer releases positrons, which meet electrons in the body. This produces two gamma rays.
  • Coincidence detection: The scanner detects these two rays at the same time to find the exact location of the tracer.
  • Hybrid imaging: The PET scan is usually combined with a CT scan to match the functional information with clear images of the body’s structure.

In hospitals and diagnostic centres, imaging departments also depend on essential equipment such as autoclaves to properly sterilise medical instruments and maintain safety standards.

Types of PET scan machine

PET scan machines come in different types, each offering unique features and applications:

  • PET-CT scanners (Hybrid): The most widely used type. They combine PET and CT in one machine to show both body function and body structure in a single scan.
  • PET-MRI scanners (Hybrid): These combine PET with MRI. They give better images of soft tissues and are useful for brain, pelvic, and head and neck cancers.
  • Time-of-Flight (TOF) PET-CT: An advanced type of PET-CT scanner. It measures the exact time taken by light particles (photons) to reach the detector. This improves image clarity and helps find small lesions more accurately.
  • Digital PET scanners: These use modern digital detectors. They provide clearer images, better detection of small lesions, and lower radiation exposure.
  • Dedicated or standalone PET scanners: These are older types and are now rarely used. They have only a ring of detectors to measure how the tracer spreads in the body.

In hospitals, advanced imaging systems like PET scanners are used along with basic diagnostic tools such as a stethoscope, which helps doctors check heart and lung sounds during routine examinations.

Each type of PET scan machine has its advantages and applications, catering to specific clinical needs and imaging requirements.

Features of the PET CT Scan Machine

Listed below are some key features of the PET CT Scan Machine:

  • Dual imaging capability: PET CT scan machines integrate both positron emission tomography (PET) and computed tomography (CT) into one device. This combination enables the simultaneous capture of metabolic data from PET and anatomical details from CT, significantly reducing the likelihood of errors by synchronising both imaging processes.
  • High-resolution imaging: These machines offer high-resolution imaging, providing clear and detailed views of internal structures such as organs and tissues. This precision helps detect minor abnormalities, such as tumours or subtle changes, which might be missed with lower-quality images. Naturally, advanced imaging features come at a premium.
  • Fast scanning speed: The rapid scanning capability of PET CT machines minimises the time patients need to remain still, thereby enhancing comfort—particularly for those who struggle to remain motionless. This speed not only improves patient experience but also boosts the productivity of healthcare facilities, an essential factor during emergencies. Devices with faster scan times are typically more expensive.
  • Radiation dose management: Equipped with advanced radiation dose management features, these machines optimise radiation levels while preserving image quality. This is especially beneficial for children and patients requiring frequent scans, as it reduces long-term exposure risks. As a result, machines with this technology often come with a higher price tag.

Components of a PET scanner system

The main components are:

  • Detector ring: Detects gamma rays emitted by the radiotracer.
  • Radiotracer: Injected into the patient to emit positrons for imaging.
  • Data acquisition system: Collects and processes gamma-ray data from the detectors.
  • Image reconstruction software: Converts data into 3D images for analysis.
  • Display monitor: Shows the PET scan images for interpretation by radiologists.

Uses of PET CT scanner machines

A PET CT scan machine is an effective way to help discover a variety of conditions, including cancer, heart disease, and brain disorders. Your health care provider can use this information to help diagnose, monitor, or treat your condition.

  • Cancer:
    PET-CT scans are usually more accurate than PET or CT scans alone for detecting cancer. They show the size of a tumour and highlight areas with high metabolic activity, which may indicate cancer growth. Early detection helps doctors plan the right treatment at the right time.
  • Neurological disorders:
    PET-CT machines help diagnose brain conditions such as Alzheimer’s disease and epilepsy. They show how different parts of the brain are working and identify areas with low activity or abnormal metabolism. This helps doctors monitor the progress of these conditions.
  • Heart conditions:
    PET-CT scans help assess heart function and blood flow. They can find areas of the heart that are not receiving enough blood, which is important in diagnosing coronary artery disease. This information supports doctors in choosing the most suitable treatment to improve heart health.
  • Treatment monitoring:
    PET-CT scans help doctors evaluate how well cancer treatment is working. They show whether tumours are shrinking or if there is any new abnormal activity, allowing changes in treatment when required.

Benefits PET scan machine

PET scan machines offer several benefits in medical diagnosis and treatment:

  • Early detection: PET scans can detect abnormalities at a cellular level, enabling early detection of diseases such as cancer, Alzheimer's, and heart conditions.
  • Accurate staging: PET scans provide detailed information about the extent and spread of diseases, facilitating accurate staging and treatment planning.
  • Treatment monitoring: PET scans help monitor the response to treatment, allowing healthcare providers to adjust therapies as needed for better outcomes.
  • Precise localisation: PET scans precisely localise areas of abnormal cellular activity, guiding biopsy procedures and surgical interventions.
  • Personalised medicine: By providing detailed functional information, PET scans enable personalised treatment approaches tailored to individual patient needs.

Factors to consider when buying a PET scanner

  • Budget: Determine the cost range that fits your financial constraints.
  • Imaging capabilities: Assess the scanner's resolution, sensitivity, and image quality.
  • Scanner size: Consider the physical dimensions of the scanner and available space in your facility.
  • Maintenance requirements: Evaluate the maintenance needs and costs associated with the scanner.
  • Compatibility: Ensure compatibility with existing infrastructure and software systems.
  • Support and training: Look for vendors offering comprehensive support and training programs.
  • Regulatory compliance: Ensure the scanner meets regulatory standards and certifications.

PET scan machine prices in India

PET Scan Machines

Prices

Refurb Philips Ingenuity TF 64 PET CT Scanner

₹ 3,30,00,000

Siemens Biograph 2 Slice Pet And Ct

₹ 1,80,00,000

Refurbished Siemens PET CT Scan Machine

₹ 2,50,00,000

Siemens 16 Slice Ct Scan Machine

₹ 2,80,00,000

Refurbished Philips Brilliance 16 Slice CT Scan Machine

₹ 3,00,00,000


Financing options for buying PET scan machines

For healthcare facilities looking to acquire PET scan machines, various financing options are available to ease the financial burden.

Bajaj Finance offers specialised medical equipment finance tailored to the healthcare industry's unique needs. These loans provide flexible repayment terms and competitive interest rates, allowing healthcare providers to spread out the cost of purchasing PET scan machines over time. Healthcare professionals evaluating borrowing costs can explore the medical equipment finance interest rate to make informed

Bajaj Finance also offers doctor loans specifically designed to meet the financial needs of medical professionals. These loans provide quick and hassle-free financing for purchasing medical equipment. With features such as minimal documentation, fast approval, and attractive interest rates, doctor loans from Bajaj Finance offer healthcare providers a convenient and accessible financing solution to acquire essential medical equipment and enhance patient care facilities. Before applying, it’s advisable to check the medical equipment finance eligibility criteria to ensure a smooth application process.

Check your medical equipment finance eligibility today and discover tailored financial solutions that align with your current needs. 

Difference between a PET scan, CT scan and MRI machine

When comparing PET scans, CT scans, and MRIs, each imaging technique offers unique advantages and applications. Below is a comparison table followed by a brief explanation of their differences:

 

PET Scan

CT Scan

MRI

Technology

Uses radioactive tracers to detect metabolic activity in tissues.

Utilises X-rays to produce detailed cross-sectional images of the body.

Relies on strong magnetic fields and radio waves to generate detailed images of internal structures.

Image quality

Offers functional information about cellular activity.

Provides detailed anatomical images.

Offers detailed structural and soft tissue images.

Applications

Used primarily in oncology, cardiology, and neurology.

Commonly employed for diagnosing fractures, tumours, and infections.

Ideal for imaging soft tissues, joints, and the brain.

Radiation exposure

Involves exposure to a small amount of radiation from the radioactive tracer.

Involves higher radiation exposure compared to MRI.

Does not involve exposure to ionizing radiation.



PET scans excel in providing functional information about cellular activity, making them valuable in oncology, cardiology, and neurology. CT scans offer detailed anatomical images, commonly used for diagnosing fractures, tumours, and infections. MRIs are ideal for imaging soft tissues, joints, and the brain, without exposure to ionizing radiation. Understanding the differences between these imaging modalities allows healthcare professionals to select the most appropriate technique based on the patient's clinical needs and the desired diagnostic information. For healthcare facilities planning to upgrade diagnostic infrastructure or acquire advanced imaging equipment, hospital loans can provide essential financial support. Additionally, medical practitioners seeking to invest in specialised diagnostic tools can benefit from a professional loan tailored to their specific needs.

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Frequently asked questions

What are the different types of PET scan machines?
PET scan machines come in various types, including standalone PET scanners and hybrid PET/CT scanners. Standalone PET scanners focus solely on functional imaging, while hybrid PET/CT scanners combine PET and CT technologies to provide both functional and anatomical imaging in a single scan.
What is the function of a PET scan machine?

A PET scan machine detects positron-emitting radioactive substances in the body, allowing for detailed imaging of metabolic activity and molecular functions. Used to detect cancer, heart functioning anomalies and many more diseases.

What is the price range of a PET scan machine?

The cost of a PET scan machine varies widely depending on factors like brand, features, and specifications, typically ranging from lakhs to crores of rupees.

How does a PET scan machine differ from an MRI machine?

While both PET and MRI machines are used for medical imaging, PET scans primarily visualize metabolic activity and molecular functions, whereas MRI scans provide detailed anatomical images of tissues and organs.

What are the limitations of PET scanners?

Despite their diagnostic power, PET scanners are not without limitations. Firstly, they focus on metabolic activity rather than anatomy, meaning they may not detect diseases when physical changes are minute. Secondly, the radioactive tracers used can involve certain health risks, particularly to pregnant women or persons with kidney disease. Lastly, its high cost and the need for technical expertise can limit access in many regions.

What are the parts of a PET scan machine?

A PET scan machine consists of components such as the gantry, which houses the detector ring, the scanner table that moves the patient into the gantry, and a computer system that processes and displays the resulting images. The detector ring is a critical part as it captures the gamma rays emitted from the patient’s body and converts them into electrical signals.

What is the principle of PET scanner?

The operating principle of PET scanners hinges on the detection of gamma rays. When the radioactive tracers are absorbed by the body's tissues, they decay and emit positrons, which immediately collide with nearby electrons. This collision generates pairs of gamma rays that travel in opposite directions and are captured by the scanner's detector ring. By recording these simultaneous hits, the system can pinpoint the tracer's location, creating a detailed image of chemical activity within the body.

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