{
  "id": 19122,
  "title": "Medical question: Black dots are the valves ?",
  "url": "/competitions/second-annual-data-science-bowl/discussion/19122",
  "author_name": "",
  "post_date": "2016-02-22T17:40:25.420Z",
  "votes": null,
  "comment_count": 4,
  "views": 715,
  "content": "<p>Hi, in the images I see strange black dots.</p>\n\n<p>It's strange because the MRI create the image by the magnetic echo of hydrogen ions, and i think the black dots means there is no hydrogen.</p>\n\n<p>For example, in the image attached from study 1, sax_8.</p>\n\n<p>These black dots are the valves ?</p>",
  "messages": [
    {
      "id": "109025",
      "postDate": "02/22/2016 17:40:25",
      "content": "<p>Hi, in the images I see strange black dots.</p>\n\n<p>It's strange because the MRI create the image by the magnetic echo of hydrogen ions, and i think the black dots means there is no hydrogen.</p>\n\n<p>For example, in the image attached from study 1, sax_8.</p>\n\n<p>These black dots are the valves ?</p>",
      "rawMarkdown": "Hi, in the images I see strange black dots.\r\n\r\nIt's strange because the MRI create the image by the magnetic echo of hydrogen ions, and i think the black dots means there is no hydrogen.\r\n\r\nFor example, in the image attached from study 1, sax_8.\r\n\r\nThese black dots are the valves ?",
      "votes": null
    },
    {
      "id": "109029",
      "postDate": "02/22/2016 18:32:33",
      "content": "<p>Looks like you are reading those images wrong. The black spots in the blood pool should not be there. Looks like you might be reading them as 8bit when they are 16-bit or something like that. </p>",
      "rawMarkdown": "Looks like you are reading those images wrong. The black spots in the blood pool should not be there. Looks like you might be reading them as 8bit when they are 16-bit or something like that.",
      "votes": null
    },
    {
      "id": "109033",
      "postDate": "02/22/2016 18:59:35",
      "content": "<p>My model crashes into the space :O </p>\n\n<p>Must be why I can not get anything. :O</p>\n\n<p>Thanks Michael :D</p>",
      "rawMarkdown": "My model crashes into the space :O \r\n\r\nMust be why I can not get anything. :O\r\n\r\n\r\nThanks Michael :D",
      "votes": null
    },
    {
      "id": "109072",
      "postDate": "02/23/2016 00:46:39",
      "content": "<p>You are clipping the pixel values to 8-bit range as Michael noted. Contest images are 16-bit, although the maximum value used in the whole data set is 4095.</p>",
      "rawMarkdown": "You are clipping the pixel values to 8-bit range as Michael noted. Contest images are 16-bit, although the maximum value used in the whole data set is 4095.",
      "votes": null
    },
    {
      "id": "109074",
      "postDate": "02/23/2016 01:09:14",
      "content": "<p>You are right Paul, I'm using a poor toolkit  and all my images are with black dots. </p>\n\n<p>It's no good :O</p>",
      "rawMarkdown": "You are right Paul, I'm using a poor toolkit  and all my images are with black dots. \r\n\r\nIt's no good :O",
      "votes": null
    }
  ],
  "comments": [
    {
      "id": 109029,
      "author_name": "michaelhansen",
      "author_url": "",
      "post_date": "02/22/2016 18:32:33",
      "content": "<p>Looks like you are reading those images wrong. The black spots in the blood pool should not be there. Looks like you might be reading them as 8bit when they are 16-bit or something like that. </p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 109033,
      "author_name": "alvaroosvaldo",
      "author_url": "",
      "post_date": "02/22/2016 18:59:35",
      "content": "<p>My model crashes into the space :O </p>\n\n<p>Must be why I can not get anything. :O</p>\n\n<p>Thanks Michael :D</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 109072,
      "author_name": "pauljurczak",
      "author_url": "",
      "post_date": "02/23/2016 00:46:39",
      "content": "<p>You are clipping the pixel values to 8-bit range as Michael noted. Contest images are 16-bit, although the maximum value used in the whole data set is 4095.</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 109074,
      "author_name": "alvaroosvaldo",
      "author_url": "",
      "post_date": "02/23/2016 01:09:14",
      "content": "<p>You are right Paul, I'm using a poor toolkit  and all my images are with black dots. </p>\n\n<p>It's no good :O</p>",
      "votes": null,
      "replies": []
    }
  ],
  "raw_markdown_by_id": {
    "109025": "Hi, in the images I see strange black dots.\r\n\r\nIt's strange because the MRI create the image by the magnetic echo of hydrogen ions, and i think the black dots means there is no hydrogen.\r\n\r\nFor example, in the image attached from study 1, sax_8.\r\n\r\nThese black dots are the valves ?",
    "109029": "Looks like you are reading those images wrong. The black spots in the blood pool should not be there. Looks like you might be reading them as 8bit when they are 16-bit or something like that.",
    "109033": "My model crashes into the space :O \r\n\r\nMust be why I can not get anything. :O\r\n\r\n\r\nThanks Michael :D",
    "109072": "You are clipping the pixel values to 8-bit range as Michael noted. Contest images are 16-bit, although the maximum value used in the whole data set is 4095.",
    "109074": "You are right Paul, I'm using a poor toolkit  and all my images are with black dots. \r\n\r\nIt's no good :O"
  },
  "source": "meta"
}