employs a tiny ultrasound transducer on the tip of a probe that bounces sound waves off the inside walls of the coronary arteries.
Then, a 3D intima and adventitia model in a state deformed by a catheter is generated by combining IVUS
and biplane X-ray angiogram images.
image frames were obtained from human coronary arteries of 14 acute coronary syndrome patients using an imaging system incorporating a 20 MHz Eagle Eye catheter (Volcano Therapeutics Inc., Rancho Cordova, CA, USA) (Figure 1).
In this case, the NSE Alpha diameter was determined based on the IVUS
assessment, and we chose an NSE Alpha 2.5 mm, which is larger than the true lumen diameter but smaller than the vessel wall diameter.
The focal length of the transducer was designed to 3 mm, which is close to the natural focus F corresponding to the near field range of flat IVUS
Commercially available IVUS
systems (2.7 F and 40-MHz IVUS
catheter [Boston Scientific Corp., CA, USA] and iLab [Boston Scientific Corp., USA]) and an IVUS
detection meter were used along with Sonos Intravascular off-line image analysis software (Hewlett-Packard Development Company, USA).
The plaque boundary detection in IVUS
image is very difficult because a region of the IVUS
image backward the guide wire often becomes shadowed, and then it contains no texture information in the shadow region as shown in Fig 2.
at baseline revealed that most of the "'nonculprit" coronary lesions-those that had been considered mild on the index angiography and were not treated at that time--were characterized by a large plaque burden, a small luminal area, or both.
"We are pleased that the LipiScan IVUS
system is now available for use by the cardiology community.
We believe the high resolution images that OCT provides along with the wider field of view, image depth, and plaque characterization that IVUS
delivers will complement each other as physicians focus on lesion assessment and therapy guidance."
Are the following tests invasive or done by ultrasound: IVUS
, which sees inside the diseased vessels in a cath lab, and VH (virtual histology), to assess plaque in arteries?
The patients underwent an initial intravascular ultrasound (IVUS
) to measure their progression of atherosclerosis and received 40 mg daily doses of the cholesterol-lowering drug rosuvastatin (Crestor).
The results are the first from ASTEROID (A Study To Evaluate the Effect of Rosuvastatin On Intravascular Ultrasound-Derived Coronary Atheroma Burden), which uses intravascular ultrasound (IVUS
) to show "unequivocal evidence of disease regression," Dr.
The Galaxy[TM] 2 IVUS
Imaging System combines leading-edge technology with simple, easy-to-use operation.
The primary endpoint was the change in average intimal index (plaque area divided by vessel area) measured by intravascular ultrasonography (IVUS