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Doctor insights on: External Beam Radiation Therapy

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Dr. Chad Levitt
47 doctors shared insights

External Beam Radiation Therapy (Overview)

Delivered internally, using unsealed liquid sources or pellets or seeds implanted temporarily or permanently. More commonly, it is delivered by a machine that aims beams from the outside at targets located internally, and passes through healthy cells on entry and exit, as the # of beams increase, and focus on the target, the dose to healthy tissue diminishes. Ebrt is common.


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What is the definition or description of: external beam radiation therapy?

What is the definition or description of: external beam radiation therapy?

Radiation can be: Delivered internally, using unsealed liquid sources or pellets or seeds implanted temporarily or permanently. More commonly, it is delivered by a machine that aims beams from the outside at targets located internally, and passes through healthy cells on entry and exit, as the # of beams increase, and focus on the target, the dose to healthy tissue diminishes. Ebrt is common. ...Read more

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Dr. Chad Levitt
47 doctors shared insights

External Beam Radiation Therapy (Overview)

Delivered internally, using unsealed liquid sources or pellets or seeds implanted temporarily or permanently. More commonly, it is delivered by a machine that aims beams from the outside at targets located internally, and passes through healthy cells on entry and exit, as the # of beams increase, and focus on the target, the dose to healthy tissue diminishes. Ebrt is common.


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How safe is external-beam radiation treatment for thyroid cancer?

How safe is external-beam radiation treatment for thyroid cancer?

Unusual: In most cases, external beam should be considered only if i-131 and surgery have failed. Targeting a single brain or bone lesion with external beam can be done, usually with limited side effects, but the goal is usually not for cure in those cases. Depending on the specifics, some thought should be given to a tyrosine kinase inhibitor as a third-line treatment. ...Read more

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What to do if I have external-beam radiation treatment for thyroid cancer?

What to do if I have external-beam radiation treatment for thyroid cancer?

Follow: The treatment for a primary thyroid malignancy is surgical resection. Radiation is employed if after a lymph node resection there is a question of any residual cancer cells. RAI is employed if there is residual thyroid tissue or remnant of thyroid Ca where the iodine localizes in remaining tissue. External beam is used for cells left behind in neck. Follow up exam and scans needed. ...Read more

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Where is an external beam radiation usually done? At a hospital?

Radiation Center: External beam radiation is done at a freestanding radiation center, a cancer center or in a hospital radiation center. ...Read more

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Is there any pain involved in an external beam radiation?

Is there any pain involved in  an external beam radiation?

Not much: The treatments aren't painful but as the treatment progresses there can be local irritation in the treatment area that can be uncomfortable. ...Read more

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I need external beam radiation for prostate cancer, will it have any bad effects on the rest of me?

I need external beam radiation for prostate cancer, will it have any bad effects on the rest of me?

not too bad: The majority of men do very well with radiation. During treatment there can be some fatigue, urinary changes and possibly some loose stools. Late term there can be a risk for erectile dysfunction, small risk for long term urinary changes, and especially with newer radiation techniques a small chance of rectal bleeding (proctitis). ...Read more

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I need external beam radiation for prostate cancer will it cause fatigue?

I need external beam radiation for prostate cancer will it cause fatigue?

Yes: Many patients experience fatigue towards the end of their treatment. However, most individuals who work can continue to do so. ...Read more

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How long does it take for a bladder to heal is biopsy if performed where there has been external beam radiation damage? ( treated for prostate cancer)

It Depends: The rate and extent of healing depend on the amount of radiation received, the time since radiation, the size of the wound, other medical problems a person may have and other factors. Generally, i would expect that a bladder biopsy after prostate cancer radiation would heal in a a week or two, but there is a small possibility of getting a long-lasting wound. ...Read more

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Is it a good idea to eat a high-protein diet before starting beam radiation therapy?

Is it a good idea to eat a high-protein diet before starting beam radiation therapy?

If you have fatigue: Its common for radiation departments to tell patients to eat higher protein diets. However many patients are not malnourished or have any fatigue. If a patient has been losing weight we offer this suggestion and supplements (i tell them to eat anything they like to keep weight on tempered by if the patient is diabetic who has to watch sugar intake). ...Read more

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Gamma Rays (Definition)

This is light of extremely short wavelengths typically produced either among the stars / in cosmic rays or by radioactive element decay. Gamma rays form the background of normal radiation in which we all live; it is substantially greater than the exposure we get from imaging scans or should get from ...Read more


Dr. Bahman Daneshfar
281 doctors shared insights

Radiation Therapy (Definition)

Radiation therapy is a common cancer treatment with the potential to have harmful side effects on a ...Read more