目标：

• 医生透过电 脑仿真技术，基于MRI扫描数据来建立虚拟的乳腺及病症模型。然后，标示出手术的计划和应变设想。经由一群医师会诊后，以更高质量、更低风险的途径来执行全新的手术计划。

• 例如，我在进行的<VR+乳癌手术>内容开发时，就透过精密的医疗MRI扫描真实乳房线体(含肿瘤)，取得MRI产出的DICOM三维模型作为我的<乳腺素材>，再经过3D Slicer等工具准确转换成为Unity 3D能接受的<VR素材>，才能制作出一个几可乱真，但又不失真的VR应用(App)，来精确地引导医生的手术进行。

认识MRI医疗素材：

• 素材就是从真实(珍珠)加以萃取出来的要素。要素就是必要的、本质性(Essential) 的元素或材料。

• 根据牛津字典的解释，"Essential" 这个字的涵义是：不可或缺的。也就是，我们常说的：本质的。

• 所以VR内容开发即是：从真实(TR)中萃取本质性的素材，以此素材为中心，发挥想象力，创作一个精彩耀眼的非实(VR)来激励人心，启迪心灵，寓教于乐。

• 例如，我在进行的<VR+乳癌手术>内容开发时，就透过精密的医疗MRI扫描真实乳房线体(含肿瘤)，取得MRI产出的DICOM三维模型作为我的<乳腺素材>，再经过3D Slicer等工具准确转换成为Unity 3D能接受的<VR素材>，才能制作出一个几可乱真，但又不失真的VR应用(App)，来精确地引导医生的手术进行。

基本制作途径： 

• MRI(DICOM)一>电脑解析并迭加信息一>医师判读并迭加信息一>VR素材(例如U3D可演示渲染)。 

• 例如，可参考：

范例观摩(1)：3D Printing from MRI data in 5 steps 

• Software Needed (free):

  Step-1、OsiriX (Mac only), Invesalius, 3D Slicer, Seg3D, or ImageVis3D - To get the MRI data into a mode
  Step-2、Meshlab, Netfabb, or MeshMixer- To fix the Model so that it can print

• MRI--->VR, 只需要上面的Step-1即可，不需要Step-2(专为3D Printing)。

• 参考：http://www.instructables.com/id/3D-Printing-from-MRI-data-in-5-steps/

范例观摩(2)：Look into your brain with VR - Visualizing MRI with Oculus Rift and Razer Hydra

• This is awesome! Arguably the best MRI visualisation method using VR I have seen so far and interesting for research. 

• How do you get the MRI imagery organized into slices in unity?

• "I plan to ask author of Inside Insides if I can use his scans and bundle them with the demo, but I'll definitely release the functionality where you can take any GIF or list of images and it'll make a 3D texture out of it for visualization using my volume rendering shader."

• "I didn't get it organized into slices, that's not how it works. I create a 3D texture from the slices and then I sample it using a volume sampling method in the fragment shader."

• "It's not your classical voxel rendering (where you can see little cubes), it essentially ray-marches through the 3D texture, accumulating color at each point of the volume along the direction from the camera for each fragment."

•  参考：https://www.reddit.com/r/oculus/comments/3g7cnc/look_into_your_brain_with_vr_visualizing_mri_with/

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