Arterial Imaging With a New Forward‐Viewing Intravascular Ultrasound Catheter, IIThree‐Dimensional Reconstruction and Display of Data
作者:
Kok-Hwee Ng,
James Evans,
Michael Vonesh,
Sheridan Meyers,
Terry Mills,
Bonnie Kane,
William Aldrich,
Yue-Teh Jang,
Paul Yock,
Michael Rold,
Sanford Roth,
David McPherson,
期刊:
Circulation
(OVID Available online 1994)
卷期:
Volume 89,
issue 2
页码: 718-723
ISSN:0009-7322
年代: 1994
出版商: OVID
关键词: ultrasonics;imaging;atherosclerosis
数据来源: OVID
摘要:
BackgroundCurrent intravascular ultrasound (IVUS) catheters provide transverse imaging at the level of the ultrasound transducer. This limits imaging to large-diameter segments without critical atherosclerotic narrowings. We have developed a prototype 20-MHz forward-viewing IVUS catheter that provides two-dimensional sector imaging distal to the catheter tip. A present limitation of this technique is that the catheter must be manually rotated to obtain multiple longitudinal views required to integrate the segment into a three-dimensional matrix. To overcome this, we have developed an algorithm that reconstructs these multiple two-dimensional forward-viewing IVUS images into a three-dimensional matrix for more complete depiction of the segment distal to the ultrasound catheter. This algorithm allows display and multidimensional slicing of the three-dimensional reconstruction.Methods and ResultsTo test our algorithms, five arterial segments (three canine aortas, two human femoral arteries) were evaluated in vitro. In each segment, 36 forward-viewing longitudinal slices were collected, digitized, processed, and reoriented to produce a three-dimensional reconstruction (3DR) matrix. The matrix data were sliced into parallel transverse sections and compared with morphometric interpretation of histological sections (Histo). As a result, image data could be reconstructed for a distance of 2.0 cm ahead of the catheter. 3DR easily demonstrated wall and luminal morphology and provided transverse IVUS images comparable to the histological specimens. A good correlation was noted between Histo- and 3DR-determined luminal diameters (LD) and luminal areas: 3DR LD=1.4 Histo LD−0.4,r= .86; 3DR LD=0.7±0.20 cm (mean±SD); and Histo LD=0.7±0.13 cm.ConclusionsThese preliminary data demonstrate the feasibility of 3DR of forward-viewing IVUS data. This method allows rapid, detailed analysis of diseased arterial segments previously unavailable with standard IVUS and may permit better targeting of interventional techniques.
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