Treatment Planning Chapter 11-Thorax and Breast (Bentel)
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The most commonly occurring cancer in the United States is
When an immobilization device is needed, it is best to first determine the _______, and then________.
first determine beam orientation THEN build the device
It is important to reproduce the patient's position as it was during________.
the simulation procedure
Opposed anterior and posterior fields in the chest invariably cause a (higher/lower?) dose near the (cephalad/caudal) margin of than at the ______.
higher dose near the cephalad margin of the CAX
A lung boost is often delivered via_____
opposed oblique fields
Treatment fields in the chest should be designed with_______in mind.
Tumors in the lower 2/3 of the esophagus can be boosted via_________
A posterior and two anterior obliques
Aligning two points separated by a long distance (is/is not?) a reliable method to reproduce a patient's position.
Is a reliable method
In setting up opposed oblique fields to treat a lung tumor it is important to know_______.
The SSD for each field
The number of US women who will develop breast cancer is approximately one in ______.
The regional lymph nodes in breast cancer are:
- internal mammary
In most breast treatment techniques, field matching is a problem between:
- Between the internal mammary and the tangential field
- Between the tangential and the supraclavicular fields
The couch angle necessary to avoid bean divergence from the tangential fields into the SCV field depends on the(list 2 things)
- 1)length of the tangential field in the direction of the SCV field
To avoid beam divergence into the tangential fields into the SCV field the (foot/head) of the couch is turned(towards/away) from the collimator(gantry).
foot of couch is turned AWAY from the collimator
To avoid beam divergence into the lung by tangential fields the CAXs can be separated by slightly(more/less?) than _______degrees.
separated by slightly MORE than 180 degrees
Multiple adjacent electron fields to treat a chest wall recurrence should be considered ONLY if _______is available.
A boost is sometimes delivered to the tumor bed in breast cancer using
- an electron beam or an interstitial implant
- (also Accuboost)
Cardiac toxicity from breast irradiation is __________.
sometimes a serious problem
The internal mammary nodes are sometimes treated in a separate field using an electron or photon beam or are_______;
included in the tangential fields
The most important considerations to avoid radiation-induced pneumonitis is(name 3):
- 10total dose
- 2)fractionation schedule
- 3)volume of irradiated lung
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