Abstract:
:Low motion phases for cardiac computed tomography reconstructions are currently detected manually in a user-dependent selection process which is often time consuming and suboptimal. The concept of motion maps was recently introduced to achieve automatic phase selection. This pilot study compared the accuracy of motion-map phase selection to that with manual iterative selection. The study included 20 patients, consisting of one group with low and one with high heart rate. The technique automatically derives a motion strength function between multiple low-resolution reconstructions through the cardiac cycle, with periods of lowest difference between neighboring phases indicating minimal cardiac motion. A high level of agreement was found for phase selection achieved with the motion map approach compared with the manual iterative selection process. The motion maps allowed automated quiescent phase detection of the cardiac cycle in 85% of cases, with best results at low heart rates and for the left coronary artery. They can also provide additional information such as the presence of breathing artifacts. Motion maps show promise as a rapid off-line tool to automatically detect quiescent cardiac phases in a variety of patients.
journal_name
Eur Radioljournal_title
European radiologyauthors
Hoffmann MH,Lessick J,Manzke R,Schmid FT,Gershin E,Boll DT,Rispler S,Aschoff AJ,Grass Mdoi
10.1007/s00330-005-2849-zsubject
Has Abstractpub_date
2006-02-01 00:00:00pages
365-73issue
2eissn
0938-7994issn
1432-1084journal_volume
16pub_type
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