TY  - JOUR
AU  - Marina Alberti
AU  - Simone Balocco
AU  - Xavier Carrillo
AU  - Josefina Mauri
AU  - Petia Radeva
PY  - 2013//
TI  - Automatic non-rigid temporal alignment of IVUS sequences: method and quantitative validation
T2  - UMB
JO  - Ultrasound in Medicine and Biology
SP  - 1698-712
VL  - 39
IS  - 9
KW  - Intravascular ultrasound
KW  - Dynamic time warping
KW  - Non-rigid alignment
KW  - Sequence matching
KW  - Partial overlapping strategy
N2  - Clinical studies on atherosclerosis regression/progression performed by intravascular ultrasound analysis would benefit from accurate alignment of sequences of the same patient before and after clinical interventions and at follow-up. In this article, a methodology for automatic alignment of intravascular ultrasound sequences based on the dynamic time warping technique is proposed. The non-rigid alignment is adapted to the specific task by applying it to multidimensional signals describing the morphologic content of the vessel. Moreover, dynamic time warping is embedded into a framework comprising a strategy to address partial overlapping between acquisitions and a term that regularizes non-physiologic temporal compression/expansion of the sequences. Extensive validation is performed on both synthetic and in vivo data. The proposed method reaches alignment errors of approximately 0.43 mm for pairs of sequences acquired during the same intervention phase and 0.77 mm for pairs of sequences acquired at successive intervention stages.
UR  - http://dx.doi.org/10.1016/j.ultrasmedbio.2013.03.005
N1  - MILAB
ID  - Marina Alberti2013
ER  -