Simultaneous integrated boost with helical arc radiotherapy of total skin (HEARTS) to treat cutaneous manifestations of advanced, therapy-refractory cutaneous lymphoma and leukemia - dosimetry comparison of different regimens and clinical application

Table 1 Technique comparison of helical irradiation of total skin (HITS) and helical arc radiotherapy of total skin (HEARTS)

	HITS	HEARTS
Target delineation	Face sparing	Total skin without sparing
Location of CCCB	Head& chest& abdomen	Head& chest& abdomen & pelvis & bilateral upper one-third of femur
Distance between CCCB and PTV	2.5 cm	2.2 cm
Inner margin of PTV	0.5 cm	0.3 cm
Bone marrow targeting	Bony structures included in PC space	Independent bony structures adjacent with PC space
Priority of RARs	PC space	Independent bony structure > PC space

Abbreviation: CCCB Central core complete block, PC space Space between PTV and CCCB, PTV Planning target volume, RARs Regions at risk

ISSN: 1748-717X