顱內出血（intracerebral hemorrhage，縮寫：ICH

腦出血示意圖 [1]如下：

這個kernel的作者對其中上述表格中的其中３種腦出血的起因和定義進行了詳細的介紹．

Epidural hematoma
A hematoma is a collection of blood, in a clot or ball, outside of a blood vessel. An epidural hematoma occurs when blood accumulates between your skull and the outermost covering of your brain.

It typically follows a head injury, and usually with a skull fracture. High-pressure bleeding is a prominent feature. If you have an epidural hematoma, you may briefly lose consciousness and then regain consciousness.

Subdural hematoma
A subdural hematoma is a collection of blood on the surface of your brain.

It’s typically the result of your head moving rapidly forward and stopping, such as in a car accident. However, it could also suggest abuse in children. This is the same type of movement a child experiences when being shaken.

A subdural hematoma is more common than other ICHs in older people and people with history of heavy alcohol use.

Intracerebral hemorrhage
Intracerebral hemorrhage is when there’s bleeding inside of your brain. This is the most common type of ICH that occurs with a stroke. It’s not usually the result of injury.

A prominent warning sign is the sudden onset of neurological deficit. This is a problem with your brain’s functioning. The symptoms progress over minutes to hours. They include:

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對于Dicom的定義，[1]中作者給出了自己的理解：

Dicom is a format that has metadata, as well as Pixeldata

也就是Dicom包含兩部分，一個是元數據，一個是pixeldata.

講人話就是Dicom包括[2]中輸出的Tag數據，以及圖片數據

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這個kernel下面有個醫學生評論:

For visualizing hemorrhages, radiologists use the brain window.

意思是作者使用了bone window,但是放射科醫生使用的一般是brain window來觀察CT圖片．

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Reference:

[1]https://www.kaggle.com/marcovasquez/basic-eda-data-visualization

[2]https://blog.csdn.net/appleyuchi/article/details/102388184

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