Radiation therapy has changed significantly over the years. Earlier, the treatment approach was largely based on images taken before treatment and careful positioning of the patient. Today, radiation oncology can use imaging immediately before or during treatment to help confirm where the treatment area is and whether the patient is positioned correctly.
This approach is known as Image-Guided Radiation Therapy (IGRT).
For patients searching for Image-Guided Radiation Therapy in Dwarka, IGRT is particularly relevant because modern cancer treatment is increasingly focused on delivering radiation accurately while considering the healthy tissues surrounding a tumour.
It is important to understand that IGRT is not a separate type of cancer medicine. It is a technology-assisted approach to radiation treatment that uses imaging to improve treatment setup and precision.
At Venkateshwar Hospital in Sector 18, Dwarka, the Radiation Oncology department lists Dynamic & Segmental IGRT/IMRT, VMAT, SBRT, frameless SRS, PET/MRI fusion-based radiation planning and real-time six-dimensional patient correction among its specialised services.
Dr Mohit Kadian is listed by the hospital as a Consultant in Radiation Oncology, with an MBBS and MD qualification.
IGRT stands for Image-Guided Radiation Therapy.
The basic idea is straightforward: before delivering radiation, the treatment team uses imaging to verify the patient's position and, depending on the treatment, assess the location of the target.
Why does this matter?
A tumour is not necessarily in exactly the same position every day.
The patient's body can move slightly between treatment sessions. Organs can also change position or shape.
For example, the position of the prostate can be influenced by the amount of urine in the bladder or the contents of the rectum. Tumours in the chest or upper abdomen can move with breathing.
Even small changes can become relevant when radiation is being delivered very precisely.
IGRT helps the treatment team account for these changes.
The goal of radiation therapy is to deliver the prescribed dose to the treatment target while limiting unnecessary exposure to surrounding normal tissues.
Modern treatment plans can be extremely precise.
But there is a simple practical problem: the patient may not be positioned in exactly the same way every day.
A few millimetres of difference can matter in some treatment situations.
Image guidance provides an additional layer of verification.
Instead of relying entirely on marks made during the simulation process, the treatment team can use imaging to check the setup before radiation delivery.
Depending on the treatment centre and the type of cancer, different imaging technologies may be used.
The exact process depends on the cancer and the radiation equipment being used.
Generally, it follows several stages.
Before radiation begins, the patient undergoes a planning process.
A CT simulation is commonly performed, and additional imaging such as MRI or PET-CT may be incorporated when clinically appropriate.
The radiation oncologist defines the area that needs treatment.
Nearby organs that need protection are also identified.
The treatment planning team creates a detailed radiation plan based on the patient's anatomy and prescribed dose.
At each treatment appointment, the patient is placed on the treatment couch in the planned position.
Imaging is performed to check whether the patient is positioned correctly relative to the treatment plan.
If the imaging shows that the patient's position needs adjustment, the treatment team can make appropriate corrections.
Once the setup is verified, radiation is delivered according to the approved plan.
This process is particularly valuable for treatments where precision is important.
No.
These two terms are often mentioned together, but they describe different aspects of radiation therapy.
IMRT, or Intensity-Modulated Radiation Therapy, is a method of shaping and modulating radiation dose.
IGRT, or Image-Guided Radiation Therapy, uses imaging to verify the patient's position and treatment setup.
They can be used together.
For example, a patient may receive an IMRT or VMAT treatment plan while image guidance is used before each treatment to improve positioning accuracy.
Venkateshwar Hospital specifically lists IGRT/IMRT and VMAT among its Radiation Oncology services.
Again, no.
VMAT describes how radiation is delivered as the treatment machine rotates around the patient.
IGRT describes the use of imaging to verify positioning and treatment setup.
The two techniques can complement each other.
A patient may receive a VMAT plan with image guidance before treatment.
This combination allows the treatment team to work with both a highly shaped radiation plan and imaging-based positioning verification.
IGRT can be useful across many radiation treatment situations.
It may be incorporated into treatment plans for cancers such as:
The appropriate imaging and radiation technique depend on the location of the tumour and the treatment objective.
Venkateshwar Hospital describes protocol-based Radiation Oncology services for brain tumours, head and neck cancers, breast cancer, gynaecological cancers, urological malignancies, bone and soft-tissue sarcomas, lymphoma, paediatric tumours, gastrointestinal cancers and lung cancers.
IGRT is not automatically required for every patient.
The radiation oncologist determines whether image guidance is useful and what type of imaging is appropriate.
Prostate cancer is a good example of why image guidance can be useful.
The prostate is close to the bladder and rectum.
Its position can vary depending on bladder and bowel filling.
During a course of radiation treatment, the treatment team may use imaging to verify the patient's anatomy and positioning before delivering radiation.
This can help the team make appropriate setup corrections when required.
IGRT may be used alongside techniques such as IMRT or VMAT.
The exact approach depends on the patient's anatomy and treatment plan.
Breathing introduces another challenge.
A lung tumour can move as the patient breathes.
Depending on the treatment approach, the radiation team may need to assess tumour motion and account for it during planning and treatment.
This becomes particularly important for highly precise radiation techniques.
Modern radiation oncology can use motion-management strategies alongside image guidance in appropriately selected cases.
The specific method depends on the tumour and the technology available.
Head and neck cancers can require highly detailed radiation planning because several important structures are located close together.
The treatment area may be near:
Patients may also experience changes in anatomy during a prolonged course of treatment due to weight loss, swelling or other changes.
Image guidance can help the treatment team verify positioning and identify situations where adjustments may be needed.
In some circumstances, the treatment plan itself may need to be reviewed if there are significant anatomical changes.
Radiation treatment for breast cancer may also involve image guidance.
The exact approach depends on the patient's anatomy, treatment area and radiation technique.
For some patients, managing breathing motion may be important, particularly when the heart is near the radiation field.
The radiation team can determine whether specific imaging or breath-management techniques are appropriate.
When treating brain tumours or selected brain metastases, accuracy is especially important because of the sensitive structures within the skull.
Stereotactic radiation techniques such as SRS may involve very precise positioning.
Venkateshwar Hospital lists frameless SRS, SBRT and IGRT/IMRT among its specialised Radiation Oncology services.
The treatment approach depends on the size, number and location of lesions and the patient's overall clinical situation.
IGRT can involve different imaging technologies depending on the treatment system.
The purpose is to obtain useful information about the patient's anatomy or treatment position.
Venkateshwar Hospital's Radiation Oncology department lists:
among its radiation oncology technology and specialised services.
The hospital also describes its cancer centre as using a Versa-HD linear accelerator and other advanced radiation technology.
This sounds complicated, but the underlying concept is quite practical.
A patient's position can change in more than one direction.
The treatment team may need to consider movements such as:
There can also be small rotational changes.
A six-dimensional positioning system allows these positional variations to be assessed and corrected with greater precision.
Venkateshwar Hospital lists 6-dimensional patient correction in real time as one of its Radiation Oncology services and a hexapod table for precise patient positioning among its technology.
Not necessarily in the same way for every patient.
The frequency and type of imaging depend on the treatment technique, cancer type, treatment site and clinical protocol.
Some patients may require imaging before each treatment session.
Other treatment plans may use imaging according to a different schedule.
The radiation oncologist and treatment team determine the appropriate image-guidance protocol.
IGRT is designed to improve treatment setup and precision, but it does not make radiation completely risk-free.
Radiation therapy can still affect normal tissues.
The benefits and risks depend on:
The purpose of image guidance is to help the team deliver the planned treatment as accurately as reasonably possible.
It is one part of a larger quality and safety process.
It can potentially help the treatment team manage radiation exposure to nearby healthy tissues by improving setup accuracy, but it would be incorrect to promise that IGRT eliminates side effects.
Side effects depend largely on the area being treated and the radiation dose.
For example, radiation to the pelvis can cause different effects from radiation to the head and neck.
Similarly, lung radiation has different potential risks from prostate radiation.
The radiation oncologist should discuss the side effects that are relevant to the patient's individual treatment plan.
Patients are usually asked to arrive at the radiation department at their scheduled time.
The radiation therapists position the patient on the treatment couch.
Depending on the treatment plan, immobilisation devices may be used to help the patient remain in the correct position.
Image guidance is then performed.
The treatment team reviews the images and determines whether the patient's position is appropriate.
If necessary, small positioning corrections are made.
Once the setup is confirmed, radiation treatment is delivered.
The patient does not feel the radiation itself.
The treatment team monitors the patient from outside the treatment room using audio and visual systems.
No, the imaging and radiation delivery themselves are generally painless.
Some patients may find it uncomfortable to remain in one position for a period of time.
Certain treatment areas may require immobilisation equipment.
The radiation therapist explains the procedure before treatment and helps position the patient as comfortably as possible while maintaining the required accuracy.
The first step is not the radiation session.
A radiation oncologist needs to establish whether radiation therapy is appropriate and what the treatment objective is.
The patient may undergo:
Consultation → Imaging → Simulation → Target outlining → Treatment planning → Plan verification → Treatment
During planning, the team also identifies organs that should receive as little unnecessary radiation as possible.
Modern radiation planning can use CT, MRI and other imaging information depending on the cancer.
Venkateshwar Hospital describes treatment planning using three-dimensional CT reconstruction and three-dimensional dose-distribution algorithms.
A common misconception is that advanced radiation therapy is primarily about having a sophisticated machine.
The machine certainly matters.
But a radiation treatment plan also depends on clinical judgement, imaging, contouring, physics, treatment planning and quality checks.
The radiation oncologist must determine:
A technically advanced machine cannot compensate for an inappropriate treatment plan.
That is why specialist expertise remains central to radiation oncology.
Patients often encounter these terms together.
They are related but not identical.
IGRT uses imaging to help verify positioning and treatment accuracy.
SBRT is a stereotactic radiation treatment approach generally involving a high dose delivered over a limited number of sessions to a carefully selected target outside the brain.
SRS is a highly focused stereotactic radiation approach generally used for selected intracranial targets.
SRS and SBRT may use image guidance because precision is especially important in these treatments.
Venkateshwar Hospital lists IGRT/IMRT, VMAT, SBRT and frameless SRS together as specialised Radiation Oncology services.
The usefulness of IGRT depends on the treatment plan, but image guidance can be particularly relevant where:
This is one reason IGRT is commonly discussed alongside modern techniques such as IMRT, VMAT, SBRT and SRS.
For patients searching for Image-Guided Radiation Therapy in Dwarka, Dr Mohit Kadian is listed by Venkateshwar Hospital as a Consultant in Radiation Oncology. His hospital profile lists MBBS and MD qualifications.
The Radiation Oncology department where he practises lists Dynamic & Segmental IGRT/IMRT, VMAT, SBRT, frameless SRS, PET/MRI fusion-based radiation planning and real-time six-dimensional patient correction among its specialised services.
For a patient, however, the important question is not simply whether IGRT technology is available.
The more important question is whether image-guided radiation is appropriate for the particular cancer and how it fits into the overall treatment plan.
A consultation allows the radiation oncologist to review the diagnosis, scans, previous treatment and treatment objective before recommending a specific radiation approach.
If you are visiting a radiation oncologist for the first time, bring as much of your medical history as possible.
Useful documents include:
If another hospital has treated you, bring the previous radiation plan if available.
This information helps the radiation oncologist understand what treatment has already been given and what options may remain.
Cancer treatment often involves more than one visit.
Depending on the treatment schedule, a patient may need consultation, simulation, planning, daily radiation sessions and follow-up appointments.
For people living in Dwarka Sector 6, Sector 10, Sector 12, Sector 13, Sector 17 and Sector 18, accessing radiation oncology services within Dwarka can make regular treatment more manageable.
Patients from nearby areas including Palam, Dabri, Janakpuri, Uttam Nagar, Vikaspuri and Najafgarh may also find Sector 18, Dwarka, convenient for specialist cancer care.
Venkateshwar Hospital's cancer centre is located in Sector 18, Dwarka, New Delhi and offers Radiation Oncology as part of its comprehensive cancer services.
The hospital describes its cancer programme as multidisciplinary, bringing together Radiation Oncology, Medical Oncology, Surgical Oncology, Neuro Oncology, GI Oncology and other specialties.
For patients whose treatment requires more than radiation alone, this multidisciplinary structure can be particularly useful.
Before starting radiation therapy, patients should feel comfortable asking questions.
Ask how IGRT fits into your specific treatment plan.
Different cancers and treatment systems may require different approaches.
Ask what the planned image-guidance schedule will be.
Understanding the relationship between image guidance and radiation delivery can make the treatment process easier to understand.
This may be particularly relevant for lung or upper abdominal cancers.
Ask whether your treatment plan may need to be reviewed or adapted.
Ask about short-term and long-term effects specific to your treatment area.
Find out when follow-up consultations and scans are expected.
Image-Guided Radiation Therapy, or IGRT, is an approach that uses imaging to help verify patient positioning and treatment setup before or during radiation therapy.
Yes. Venkateshwar Hospital in Sector 18, Dwarka, lists Dynamic & Segmental IGRT/IMRT among its specialised Radiation Oncology services.
Yes. Venkateshwar Hospital lists Dr Mohit Kadian as a Consultant in Radiation Oncology.
IGRT is better described as a radiation treatment guidance technique rather than a separate cancer treatment. It uses imaging to help the treatment team improve positioning and delivery accuracy.
No. IMRT controls the intensity and distribution of radiation, while IGRT uses imaging to verify positioning and treatment setup. They can be used together.
No. VMAT is a radiation delivery technique, whereas IGRT is an image-guidance approach. VMAT and IGRT can be combined in a treatment plan.
IGRT can be incorporated into radiation treatment for many cancers, including selected prostate, lung, head and neck, breast, brain, gastrointestinal and pelvic cancers.
Radiation delivery is generally painless. IGRT itself is an imaging and positioning process and does not normally cause pain.
IGRT is intended to improve positioning accuracy, which can help the treatment team deliver radiation according to the planned target. However, it cannot eliminate radiation side effects.
No. The need for image guidance depends on the cancer, treatment site, radiation technique and clinical circumstances.
Yes. Image guidance can be particularly important when highly precise stereotactic radiation techniques such as SBRT are being delivered.
Yes. Image guidance and accurate positioning are important components of stereotactic radiation treatment for selected intracranial lesions.
The time varies according to the treatment plan. Positioning and imaging can add time to the appointment because the treatment team needs to verify the setup before radiation is delivered.
For patients searching for Image-Guided Radiation Therapy in Dwarka, it is useful to look beyond the name of the technology.
IGRT is valuable because it addresses a practical challenge in radiation treatment: the patient's anatomy and position can change between treatment sessions.
By using imaging to verify positioning and treatment setup, the radiation team can make appropriate corrections and deliver the planned treatment more accurately.
At Venkateshwar Hospital in Sector 18, Dwarka, Radiation Oncology services include IGRT/IMRT, VMAT, SBRT, frameless SRS, PET/MRI fusion-based planning and real-time six-dimensional patient correction. The centre also lists a Versa HD linear accelerator, MRI-based radiotherapy simulation and a hexapod table for precise positioning.
Dr Mohit Kadian is listed as a Consultant in Radiation Oncology at the hospital.
For patients from Dwarka, Palam, Dabri, Janakpuri, Uttam Nagar, Vikaspuri and Najafgarh, having specialist radiation oncology services in Dwarka can also make repeated appointments more convenient.
If radiation therapy has been recommended for you or someone in your family, bring your pathology reports, scans and previous treatment records to a radiation oncology consultation. Ask what radiation technique is being recommended, whether IGRT will be used, how the treatment will be planned and what side effects you should expect.
The purpose of advanced radiation technology is not simply to make treatment sound more sophisticated. Its real value lies in using the right technology, with careful planning and specialist clinical judgement, for the patient's particular cancer.
Dr Mohit Kadian provides specialist Radiation Oncology consultation for patients seeking cancer treatment guidance in Dwarka.
