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Batra Hospital & Medical Research Centre
1, Tughlakabad Institutional Area, Mehrauli - Badarpur Road, New Delhi, Delhi 110062
Dr. Irfan Bashir
Radiation Oncology

Dr. Irfan Bashir is one of the distinguished oncologists of Delhi. He has an experience of about 12 years in cancer patient.

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Stereotactic Radiation

Stereotactic Radiation is utilized to deliver precisely large radiation doses to tumours and other relevant anatomical targets, usually in one-to-five treatment cycles, while minimizing the exposure to surrounding healthy tissues. It can be of the following types:

Image Guided Radiotherapy (IGRT)

IGRT goes a step further than IMRT and Rapid Arc. It provides high-resolution, three-dimensional images to pinpoint tumor sites, adjust patient positioning when necessary, and complete a treatment—all within the standard treatment time slot. These capabilities take IMRT and stereotactic IMRT technologies one step further by raising the quality of patient care and improving efficiency. IGRT technology accounts for motion to ensure that the target is in the same position every treatment session. With IGRT, innovative radiographic, fluoroscopic and cone-beam CT modes are integrated with automated repositioning and motion management visualization software. This enables clinicians to verify that treatments are completely in sync with respiration. The overall goal of IGRT is to target tumours more accurately and precisely without harming normal tissue.

Rapid Arc

Rapid Arc, which is an advanced technology, is used to deliver intensity modulated radiation therapy (IMRT) with speed and precision by modulating multiple parameters like dose rate, gantry speed, MLC speed, MLC position, jaw tracking, and such. It shortens treatment times to half to that of the conventional radiation process while enhancing the therapeutic outcome. So the benefits include less time for treatment, reduction in actual radiation dose, more convenience for patients and preservation of more healthy tissues.

Intensity Modulated Radiotherapy (IMRT)

Also known as “Organ Sparing” treatment, IMRT minimizes the damage to adjacent healthy tissue. It allows the oncologist to deliver radiation to a tumour with more precision and accuracy, resulting in the potential for fewer side effects and higher cure rates.A powerful Computer Program optimizes a treatment plan based on the physician's dose instruction, and information about tumor size, shape and location in the body. A medical linear accelerator, equipped with a special device called a MultiLeaf Collimator (MLC) that shapes the radiation beam, delivers the radiation in accordance with the treatment plan. The equipment can be rotated around the patient to send radiation beams from the most favorable angles for giving the tumor a high dose while preserving important healthy tissues.


Brachytherapy is a word that is derived from the Greek words ‘brachys’, which means brief or short. This refers to cancer treatment in which ionizing radiation is delivered via a radioactive material placed a short distance from or within the tumour itself, thereby giving a high radiation dose to the tumour while reducing the radiation exposure to the surrounding healthy tissues. This treatment technique is commonly used for gynaecological, prostate, head and neck, oesophagus, endobiliary, endobronchial, breast and soft tissue sarcoma.

4D Respiratory Motion Gated Radiotherapy

This highly advanced technique that increases the treatment accuracy of IMRT and Rapid Arc is used in specific cases such as abdominal and thoracic cancers. Here, the position of the tumour site may vary depending upon the respiratory rhythm. This displacement could be up to 2-3 cm. Using RPM, the tumour can be treated more precisely without much damage to the surrounding tissues. In short, it synchronizes patient’s own respiratory rhythm so that radiation is delivered when the tumour is within the treatment field and hence minimizes the damage to the surrounding and other vital tissues.

4D Respiratory Motion Gating - CT

In this technique, a CT image is taken in 4D in sync with the patient’s breathing pattern and the image is used to track the movement of the tumours and for tumour delineation using advanced intensity projection software.