Why does a dr say cyberknife is not an option but beam radiation is an option?

Studies: In general, certain therapies are recommended for certain groups of patients based on studies that have been done showing that treatment is effective in that group. Sometimes, groups of people don't benefit from certain treatments and may even be harmed. You should ask your doctor why those specific recommendations were made.

Different indication: Cyberknife is radiosurgery and external radiation is daily fractionated radiation treatment. Each disease and stage of cancer has different recommendations. However is the doctor who is saying this have the option of cyberknife available. There are other methods not called cyberknife buy very capable radiosurgery brands. Get a second opinion if in doubt.

Pinpoint vs beam: Cyberknife is a specialized form of external radiation. It is usually used for cancers that are small and very localized. The treatments are given over just a few days which means the dose of radiation for each day is quite high. Essentially the tumor is being burned out. External beam has a wider margin of treatment. It covers a greater directed area and is given at less dose daily.

Cyberknife: Cyberknife is a brand of machine that delivers stereotactic radiosurgery. Many other machines do the same thing, and is a highly focused intense radiation, usually to a small tumor given in 1-5 treatments. External beam radiation takes several weeks and has a wider range of uses and indications. Each has it place. See nccn.Org for current cancer treatment guidelines.

Cyberknife: Cyberknife is one of a few ways to deliver stereotactic treatment, which delivers very high doses of radiation to a very small, well-defined area. There are many reasons why a radiation oncologist may choose to use stereotactic treatment; for example, when a tumor is known or suspected to involve multiple areas or the tumor is not well-defined, then conventional radiation is a better option.