How far is the automated 3-D segmentation of Brain MRI efficient compared to manual segmentation?

3d scanner body image

Sandhya

We are doing a project on automated 3-D segmentation of brain MRI using MATLAB. We would like to know the extent to which "Surf" commands are efficient in producing reliable segmented 3-D image. The accuracy level, how much it is better compared to manual segmentation. We need statistical detail, kindly help us....

Answer
This correspondence deals with the development of an
automated 3-D segmentation of Brain MRI. The proposal is a
model-based approach for accurate, robust, and automated
tissue segmentation of brain MRI data of single as well as
multiple magnetic resonance sequences. The main contribution
of this study is that we employ an edge-based geodesic active
contour for the segmentation task by integrating both image
edge geometry and voxel statistical homogeneity into a novel
hybrid geometricâstatistical feature to regularize contour
convergence and extract complex anatomical structures. We
validate the accuracy of the segmentation results on simulated
brain MRI scans of both single T1-weighted and multiple T1/
T2/PD-weighted sequences. When compared to a current stateof-
the-art region based level-set segmentation formulation,
our white matter and gray matter segmentation resulted in
significantly higher accuracy levels with a mean improvement
in Dice similarity indexes. Thus the development of the project
is done using MATLAB simulation for results.
A Hybrid Automated 3D Segmentation in Brain MRI -------------------------------------------------------- Advantages of a MRI scan
⢠MRI scanners are good at looking at the non-bony parts
or "soft tissues" of the body. In particular, the brain, spinal
cord and nerves are seen much more clearly with MRI
than with regular x-rays and CAT scans.
⢠Also, muscles, ligaments and tendons are seen quite well
so that MRI scans are commonly used to look at knees
and shoulders following injuries.
⢠A MRI scanner uses no x-rays or other radiation.
⢠A disadvantage of MRI is itâs higher cost compared to a
regular x-ray or CAT scan. Also, CAT scans are frequently
better at looking at the bones that MRI.

What is the difference between a pet scan and a cat scan?

Sweetask

no obnoxious answers please I want a serious answer.

Answer
a cat (computerized axial tomography) scan gives a 3D image of the body by looking at horizontal "slices" of the body- so the organs can be viewed as they are spatially. It is a fancy version of a plain x-ray that just shows a view from one angle- everything on top of the other. A pet scan is different primarily in that it gives information about function, not just form. A solution of glucose molecules that have been "tagged" with a radioactive marker is injected into the patient through a vein. The glucose goes first and foremost to "sugar hungry" locations- for example the brain, or any malignancy that might be present in the body. The scanner then just scans for the location of concentrations of radioactivity and forms the image of the organs in this way. All pet scanners are not created equal- look for the best and probably the newest one in your area- some have more "rings"- and produce better, clearer images.Hope this helps a little.

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