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MEDICLINIC CITY HOSPITAL COMPREHENSIVE CANCER CENTRE

Radiotherapy Modalities
 
The CCC offers all types of treatment from percutaneous radiotherapy and palliative emergency radiotherapy to high-precision, low volume, hyper fractionation therapy with IMRT (intensity-modulated radiotherapy). Particularly important is the positioning and reproducibility of daily radiation. The “on-board imaging” system, used in all patients, provides a tool which permits the routine use of IGRT (image-guided radiotherapy), leading to even more precise planning and administering of daily.

From December 2017, Mediclinic City Hospital is proud to be able to serve our oncology patients more effectively with two new specialised treatment modalities:

I. Brachytherapy

Treating cancer from the inside

Brachytherapy has proven to be a successful treatment for cancers of the cervix, endometrium, prostate and other types of cancers. Brachytherapy treats cancer by placing radioactive sources directly into or next to the area requiring treatment. This enables clinicians to deliver a high dose with minimal impact on surrounding healthy tissues.

Brachytherapy primarily uses two different techniques:

Low Dose Rate (LDR) uses a lower strength radioactive source and is associated with longer treatment times (for the one time treatment).

High Dose Rate (HDR) uses a higher strength radioactive source contained within an afterloader device. The afterloader delivers the source for a brief period of time to catheters, needles or other appliances placed in the tumour site. HDR is much shorter procedure (minutes vs. days) than LDR but it does require multiple treatments. Increasingly more common, HDR techniques have replaced LDR techniques for most body sites.

With any radiotherapy technique, the goal is the same: to conform the dose to the size and shape of the target while limiting side effects by sparing the surrounding healthy anatomy. In brachytherapy, radiation falls off very rapidly from the target area, easily accomplishing this objective.

II. SRS (Stereotactic Radiotherapy Surgery), SBRT (Stereotactic Body Radiotherapy) and SABR (Stereotactic Ablative Body Radiotherapy)
 
Stereotactic radiosurgery (SRS) is a non-surgical radiation therapy used to treat functional abnormalities and small tumours of the brain. It can deliver precisely-targeted radiation in fewer high-dose treatments than traditional therapy, which can help preserve healthy tissue. 
 
When SRS is used to treat body tumours, it’s called stereotactic body radiotherapy (SBRT).
 
SRS: Stereotactic radiosurgery (SRS) is a non-invasive treatment that uses radiation beams to accurately target brain tumours with a single high dose of radiation. SRS is not a surgical procedure and does not require an incision or anaesthesia. The radiation is administered by two to three RapidArc radiation beams. This allows radio-surgeons to target the tumour without affecting delicate structures nearby. SRS is performed as an outpatient session.
 
Stereotactic radiosurgery is effective for treating tumours in small areas in the head and neck that cannot be reached by surgery.

Indication for SRS treatment

Brain/neurological conditions, including:

  • Artero-venous malformations, meningiomas,
acoustic neuromas,
pituitary tumours
  • Brain metastases, malignant gliomas, functional conditions


SBRT: Stereotactic body radiation therapy (SBRT), also known as stereotactic ablative radiotherapy, administers very high doses of radiation using several beams of various intensities aimed at different angles to precisely target the tumour.

Stereotactic body radiation treatments are usually given as a single dose or up to five doses once a day, although this can vary depending on the type and location of the tumour and the patient’s physical condition. This procedure is chosen for patients with small, well-defined tumours who cannot tolerate surgery. For some patients, SBRT may be able to replace surgery as a primary cancer treatment.

Indications for SBRT treatment

  • Extracranial conditions
and other malignant and benign tumours (lung, liver, spine etc.)



 

   

 

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