Albert (Gong) Cheng's blog

A blog about programming, cloud computing, medicine, electronic medical record and healtcare IT.

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  • Blog Post: EMR and PHR, a comparison

    PHR and EMR are two inter-related concepts. First of all, the use cases are different. EMR is the electronic medical record primarily used at the hospital. Typically, it is the healthcare providers such as nurses or physicians use the EMR intensively. PHR is different, it centers around the patient experience...
  • Blog Post: The Window Level of DICOM standard

    Window level is another interesting feature of DICOM standard. Window level is used to transform the pixel value in DICOM file to pixel value shown on the screen. For example, DICOM modality of CT often export 12 bit images, however, LCD screen can only display 8 bit image. In order to display 12 bit...
  • Blog Post: The modality LUT of DICOM standard

    DICOM is one of the most interesting image formats if not the most. DICOM files are typically generated from medical imaging devices directly such as CT, MRI scanner. The value of each pixel in DICOM files are the raw values coming out of the scanner. When we use or visualize these pixel values, transformations...
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