Sentence examples for motion correction techniques from inspiring English sources
Although ADC measurements vary in b-values and motion correction techniques, the ADC values of cirrhotic livers are significantly lower.
Patient respiratory motion further degrades the effective spatial resolution at the liver-lung interface because motion correction techniques are not available in commercial SPECT/CT systems.
Significant improvement was obtained by using any of the two respiratory motion correction techniques compared to uncorrected motion average images (>30% differences in tumor position and size and 25% SNR increase).
As an initial step toward optimizing future designs of head restraints and improving motion correction techniques, the head motion characteristics of groups of stroke subjects, age-matched controls, and young adults were investigated with the aid of an MR simulator and a highly accurate position tracking system.
Our design minimized movement artifact by training subjects prior to scanning to move their heads minimally while producing speech, by using phrases that require minimal jaw movement (e.g., da"), and by using other sophisticated motion correction techniques (e.g., an on-line acquisition correction technique during scanning, and use of motion parameters as regressors in the analyses).
Where the reference test design scored badly, this was often related to a lack of information on patient immobilization or motion correction techniques.
PACE is a motion correction technique that tracks the position of the head during scan acquisition and applies a real-time correction for large head movements (Thesen et al., 2000).
Besides some recent studies [15, 16], data about perfusion of the different types of lung cancer, being properly assessed by sufficient scan coverage and post-processing with motion-correction techniques, is still limited.
How well a particular motion-correction technique works and what effect it has on statistical processing are difficult to evaluate, since the level of activation present is not known a priori.
The forward motion estimation, the bilateral motion compensated interpolation and the motion vector correction techniques using weighted median filters are used to generate the side information.
The use of respiratory and ECG gating (Fig. 1), possibly in combination with motion correction MR techniques such as Periodically Rotated Overlapping ParallEL Lines with Enhanced Reconstruction (PROPELLER) MR pulse sequences (e.g. Siemens 'BLADE') which can reduce motion artefact, increase signal to noise ratio, and produce sharp images even with patient motion, deserve further investigation.
