Age Is Not a Limiting Factor in Interventional Radiotherapy (Brachytherapy) for Patients with Localized Cancer

Table 1

Comparison of different radiotherapy techniques regarding local dose application potentials.

	CK	IMRT	IGRT	IRT
Target definition				Better
Interfraction movements	Better	Worse	Better	Better
Intrafraction movements	Better	Better (4D)	Better (4D)	Better
Target dose painting	Better	Better (4D)	Better (4D)	Better
Low dose volumes	Worse	Worse	Worse	Better
OAR’s dose	Better	Worse	Worse	Better
Invasivity	Better	Better	Better	Worse
Smallest reasonable CTV	0.5 cm^3	>2 cm^3	>2 cm^3	0.5 cm^3

CK = cyberknife; IMRT = Intensity Modulated Radiotherapy; IGRT = Image Guided Radiotherapy; IRT = interventional radiotherapy (brachytherapy); CTV = Clinical Target Volume; = turns into “better” if image fusion is used for treatment planning; 4D = four-dimensional external beam radiotherapy.