کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10692784 | 1019740 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Temporal calibration of freehand three-dimensional ultrasound using image alignment
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
آکوستیک و فرا صوت
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چکیده انگلیسی
All freehand 3-D ultrasound systems have some latency between the acquisition of an image and its associated position. Previously, estimation of latency has been made by tracking a phantom in a sequence of images and correlating its motion to that recorded by the position sensor. However, tracking-based temporal calibration uses the assumption that latency is constant between scans. This paper presents a new method for temporal calibration that avoids this assumption. Temporal calibration is performed on the scan data by finding the latency at which the best alignment of the 2-D images within the reconstructed volume occurs. The mean voxel intensity variance is used as a global measure of the quality of alignment within the volume and is minimized with respect to latency for each scan. The new method is compared with previous methods using an ultrasound phantom. Finally, integration of temporal calibration with existing spatial calibration methods is discussed. (E-mail: gooding@robots.ox.ac.uk)
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultrasound in Medicine & Biology - Volume 31, Issue 7, July 2005, Pages 919-927
Journal: Ultrasound in Medicine & Biology - Volume 31, Issue 7, July 2005, Pages 919-927
نویسندگان
Mark J. Gooding, Stephen H. Kennedy, J. Alison Noble,