56 為減少射束發散在兩照野相交處所造成的過高及過低劑量,可使用以下何種技術以減低其效應?
(A) Dynamic wedge
(B) Independent jaw
(C) Bolus
(D) Negative Cerrobend block
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統計: A(45), B(51), C(5), D(16), E(0) #1104729
統計: A(45), B(51), C(5), D(16), E(0) #1104729
詳解 (共 3 筆)
#3460008
<說明>
The field overlap can also be avoided by using the samenlength and SSD for all fields and blocking the secondary pair caudally asnneeded. This technique is morenconvenient when the accelerator is equipped with asymmetric collimators thatncan be moved independently of each other.
(領域重疊,也可避免所有領域使用相同的長度和SSD,阻止二次對尾端需要。這種技術是加速器配備相互獨立可移動的非對稱準直時更方便。)
<出處>
”ThenPhysics of Radiation Therapy”, 3rd edition, P.287-289
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