TY - JOUR
T1 - Comparison of nonuniform rotational distortion between mechanical IVUS and OCT using a phantom model
AU - Kawase, Yoshiaki
AU - Suzuki, Yoriyasu
AU - Ikeno, Fumiaki
AU - Yoneyama, Ryuichi
AU - Hoshino, Kozo
AU - Ly, Hung Q.
AU - Lau, George T.
AU - Hayase, Motoya
AU - Yeung, Alan C.
AU - Hajjar, Roger J.
AU - Jang, Ik Kyung
PY - 2007/1
Y1 - 2007/1
N2 - Optical coherence tomography (OCT) is an optical analog of mechanical intravascular ultrasound (M-IVUS) with much higher spatial resolution. However, no data exist regarding the nonuniform rotational distortion (NURD) with OCT. The aim of the study was to investigate whether OCT generates less NURD relative to M-IVUS. A coronary artery phantom model was constructed with a rubber ring (3.68 mm in diameter), located at the distal end of the phantom. This model was also composed of eight equally spaced steel wires and an additional marker-wire. Two types of vascular phantoms were used, mild curve (90°) and acute curve (near 180°). Subsequent M-IVUS (n = 6) and OCT (n = 6) imaging was performed. Eight angles between eight wires, except the marker-wire, were measured from each image. These angles, measured with M-IVUS and OCT, were compared with those of high-resolution optical photography as a gold standard. The average in angle differences was significantly smaller in OCT compared with M-IVUS in the mild curve model (3.2 ± 1.0° vs, 6.9 ± 2.1°, p < 0.01). Compared with the latter model, the average in angle differences was exaggerated in the acute curve model with M-IVUS (9.1 ± 0.9° vs. 6.9 ± 2.1°, p < 0.05) but not with OCT (3.5 ± 0.8° vs. 3.2 ± 1.0°, p= not significant). OCT generates significantly less NURD compared with M-IVUS, especially in tortuous situation. (E-mail: [email protected]).
AB - Optical coherence tomography (OCT) is an optical analog of mechanical intravascular ultrasound (M-IVUS) with much higher spatial resolution. However, no data exist regarding the nonuniform rotational distortion (NURD) with OCT. The aim of the study was to investigate whether OCT generates less NURD relative to M-IVUS. A coronary artery phantom model was constructed with a rubber ring (3.68 mm in diameter), located at the distal end of the phantom. This model was also composed of eight equally spaced steel wires and an additional marker-wire. Two types of vascular phantoms were used, mild curve (90°) and acute curve (near 180°). Subsequent M-IVUS (n = 6) and OCT (n = 6) imaging was performed. Eight angles between eight wires, except the marker-wire, were measured from each image. These angles, measured with M-IVUS and OCT, were compared with those of high-resolution optical photography as a gold standard. The average in angle differences was significantly smaller in OCT compared with M-IVUS in the mild curve model (3.2 ± 1.0° vs, 6.9 ± 2.1°, p < 0.01). Compared with the latter model, the average in angle differences was exaggerated in the acute curve model with M-IVUS (9.1 ± 0.9° vs. 6.9 ± 2.1°, p < 0.05) but not with OCT (3.5 ± 0.8° vs. 3.2 ± 1.0°, p= not significant). OCT generates significantly less NURD compared with M-IVUS, especially in tortuous situation. (E-mail: [email protected]).
KW - Mechanical intravascular ultrasound
KW - Nonuniform rotational distortion
KW - Optical coherence tomography
UR - https://www.scopus.com/pages/publications/33845613478
U2 - 10.1016/j.ultrasmedbio.2006.07.020
DO - 10.1016/j.ultrasmedbio.2006.07.020
M3 - Article
C2 - 17189048
AN - SCOPUS:33845613478
SN - 0301-5629
VL - 33
SP - 67
EP - 73
JO - Ultrasound in Medicine and Biology
JF - Ultrasound in Medicine and Biology
IS - 1
ER -