High tech radiotherpy aims at refining the treatment planning and treatment delivery procedures by better outlining the target colume, as well as the surrounding normal tissues that must be protected. Ther target volume us further differentiated in segments where the radiation dose varies according to extent and nature of cancer. These technologies include PET/CT based treatment planning, IMRT, IGRT, IMAT and 3D-CRT.

The center is privileged to have six boarded Radiation Oncologists who have long experience in treating a broad spectrum of neoplasms. The radiation oncologists will be communicating with the referring physicians and planned therapy will be undertaken in an interdisciplinary approach.

How it works?

PET-CT is a medical imaging device which combines in a single gantry system both a Positron Emission Tomography (PET) and an x-ray Computed Tomography, so that images acquired from both devices can be taken sequentially, in the same session from the patient and combined into a single superposed (co-registered) image. Thus, functional imaging obtained by PET, which depicts the spatial distribution of metabolic or biochemical activity in the body can be more precisely aligned or correlated with anatomic imaging obtained by CT scanning. Two- and three-dimensional image reconstruction can be rendered

Intensity Modulated Radiation Therapy (IMRT) is a sophisticated approach to the planning and delivery of radiation therapy. Unlike conventional techniques, IMRT utilizes sophisticated computerized optimization programs to generate treatment plans that highly conform the prescription dose to the shape of the tumor in 3-dimensions (3D), thereby reducing the volume of normal tissues irradiated.

How IMRT is done?

The key behind IMRT is the use of inverse planning.
Unlike standard approaches, the target and normal tissues are first contoured on a planning computed tomography (CT) scan.
During this process, beams are divided into small “beamlets” and the intensity of each beamlet is individually optimized to satisfy pre-determined planning goals.
Facilitating the delivery of IMRT is a device known as a Multi-Leaf Collimator (MLC). Positioning in the machine head, the MLC has leaves which move in and out of the beam’s path under computer control. The longer the leaves are open, the higher the intensity; the longer they are closed, the lower the intensity.

Image-Guided Radiation Therapy (IGRT) is a broad concept which includes the use of modern imaging to improve target delineation and the use of in-room imaging to improve the delivery of radiation therapy.

In-room imaging adjusting for changes in tumor and patient position (between and during treatments) is a particularly exciting aspect of IGRT. In lay terms, it is the use of imaging in the room to ensure that patients are accurately treated on a daily basis.

What Makes IGRT Special?

IGRT is a major change in the practice of Radiation Oncology. Before IGRT, patients were imaged at most once at the beginning of treatment and only periodically during treatment. Now, patients can be imaged everyday immediately prior to treatment.

Varian RapidArc radiotherapy technology is an effective cancer treatment representing an advanced new form of image-guided IMRT. This technology enables clinicians to program a linear accelerator to deliver precise forms of IMRT up to eight times faster than other IMRT systems. It does this by delivering the complete IMRT treatment to you in fewer rotations than traditional IMRT. As a result, your tumor will receive the full radiation dose within less than two minutes compared with 10 minutes or longer for conventional IMRT.

How it works?

RapidArc radiotherapy technology delivers treatments using a Varian Linear accelerator, outfitted with an On-Board Imager kV imaging system and Cone Beam CT (CBCT) for using images to guide patient placement and treatment delivery. The linear accelerator rotates around the patient to deliver radiation treatments from nearly any angle. During a RapidArc treatment, radiation is shaped and reshaped as it is delivered continuously from virtually every angle in a 360-degree revolution around the patient.

Three-Dimensional Conformal Radiation Therapy (3DCRT) is the use of computerized tomography (CT)-based planning techniques to generate 3 dimensional (3D) volumes of internal anatomy. Sophisticated Treatment Planning Computer software then uses these volumes to shape the various radiation beams conforming to the target in each beam’s eye view (BEV).

Using multiply shaped beams from different angles, a high dose region results which encompasses the target in 3D with considerable sparing of surrounding normal tissues.

Initially introduced in the 1980’s, 3DCRT is now the standard treatment approach in most tumors of the body.