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Optical Projection Tomography (OPT) - Biomedicum Imaging Unit ...

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Depth of Focus Issues<br />

numerical aperture: NA = n sin�<br />

depth of focus: �z ~ NA -2<br />

lateral resolution: �r ~ NA -1<br />

Reconstruction:<br />

Decrease NA:<br />

� �r Depth of Focus (good)<br />

� �z Lateral Resolution<br />

(bad)<br />

3D resolution limited by �r<br />

sample size limited by �z

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