Table 1.

Description of the image data sets used in the three AAR experiments.

Data set	Objects	Number of landmarks used	Image domain	No. of images
Abdominal CT	(1) Right pelvic bone	10	512×512	40
	(2) Vertebra	12
	(3) Left pelvic bone	10
	(4) Skin boundary	12
Chest CT	(1) Right lung	10	512×512	40
	(2) Heart	9
	(3) Left lung	10
	(4) Skin boundary	12
Foot MRI	(1) Tibia	7	256×256	40
	(2) Talus	14
	(3) Calcaneous	15
	(4) Skin boundary	11