Rectal Cancer Treatment Using Radiation Therapy

 

Introduction

Recently diagnosed with rectal cancer? Then radiation therapy is your best option, according to a rectal cancer specialist in Kolkata. When cancer spreads to lymph nodes, or beyond the wall of the rectum, as well as for locally recurrent rectal cancers, radiation therapy is required.

rectal cancer specialiist


Imaging before radiation


Before employing radiation therapy, the best radiation oncologist in Kolkata and his team of experts use imaging techniques to determine where the tumors are located in the rectum and how far the spread is. 

These images allow radiation oncologists to identify where the cancer is located and plan their treatment accordingly.


Imaging techniques can include:



  • Rectal protocol MRI: In this technique, images are taken from specific angles to gain the best look at the rectum and surrounding tissue. This imaging technique is recommended by the best radiation oncologist in Kolkata. 

  • Transanal ultrasound (TRUS): It is sometimes called endorectal ultrasound (ERUS). In this technique, a probe is inserted through the anus which produces high-energy sound waves and creates images of the rectum

  • Transanal endoscopy ultrasound (EUS): In this technique, a flexible endoscope is inserted through the anus. It is often preferred to view tumors higher in the rectum, closer to the colon.

Common types of radiation



  • External beam radiation: A beam of high-energy x-rays is delivered to a patient’s tumor from outside the body. The best rectal cancer doctor in Kolkata uses Halcyon Radiation Therapy System which provides state-of-the-art, highly-targeted cancer treatment, with high precision and accuracy.

  • Brachytherapy: In this type of radiation therapy, radioactive sources are inserted inside the tumor. This is a conformal treatment as the radiation is given from within the tumor.



Intraoperative radiation therapy (IORT): After removing the tumor by surgery, this therapy is delivered directly to a tumor site. A radioactive source is fed through wires which are placed on the tumor. A Rectal tumor that has infiltrated muscles or bones in the pelvis requires this treatment. The technique is also used in cases where rectal cancer returns after its removal by radiation or surgery.

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