Tuesday, April 26, 2011
Monday, April 25, 2011
Easy way to fill the hole on the image
Is there are a better way to fill the hole in the image? The function just like the imfill in the matlab. Yes, there is the answer.
The just we need is to find a marker image, which labeled the background and the holes in different value, then find the holes position set the value with object; To label the image, 1. get the implement of the image; 2. apply the region grow find the connected object, define the object which connect with edge of the image as background, label a value to express the background, others labeled a value express the hole; 3. find the hole position and take place the value with the object value.
It’s obvious easy to understand than the morphology method to fill hole.
MRI take home point (11) Done
- Most artifacts in PE direction (such as motion) but chemical shift artifact which in FE direction.
- Ringing artifacts by insufficient sample points, Wraparound artifacts by insufficient FOV.
- Gd-chelates’ primary effect is marked shortening of T1; thus heavily T1-weighted sequences are essential for high sensitivity to cancer.
- Gd-chelate contrast agents have the potential to cause a new, potentially serious disease (nephrogenic systemic fibrosis or NSF) in patients who have moderate to end-stage kidney disease at the time of administration of contrast agent
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