{
  "id": 14052,
  "title": "The difference between class 0 and class 1",
  "url": "/competitions/diabetic-retinopathy-detection/discussion/14052",
  "author_name": "",
  "post_date": "2015-05-05T15:03:16.830Z",
  "votes": null,
  "comment_count": 7,
  "views": 3492,
  "content": "<p>Does anybody know the difference between the images from class 0 and class 1? I couldnt differentiate them.</p>",
  "messages": [
    {
      "id": "77067",
      "postDate": "05/05/2015 15:03:16",
      "content": "<p>Does anybody know the difference between the images from class 0 and class 1? I couldnt differentiate them.</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "77231",
      "postDate": "05/06/2015 04:21:48",
      "content": "<p>A single microaneurysm is enough to make it a 1. They are hard to differentiate just by casual glance because microaneurysms are no bigger than a few dozen pixels in diameter even in the full resolution images.&nbsp;</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "77563",
      "postDate": "05/08/2015 02:34:58",
      "content": "<p>[quote=jstaker7;77231]</p>\n<p>A single microaneurysm is enough to make it a 1. They are hard to differentiate just by casual glance because microaneurysms are no bigger than a few dozen pixels in diameter even in the full resolution images.&nbsp;</p>\n<p>[/quote]</p>\n<p>Do you have a reference for this?</p>\n<p>Better yet would be a reference or references that stated the criteria for the different categories.</p>\n<p>But any reference on the topic of the criteria for the categories would help ;-)</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "77833",
      "postDate": "05/11/2015 01:31:38",
      "content": "<p>Reference that state follow link below :&nbsp;</p>\n<p>http://www.icoph.org/downloads/Diabetic-Retinopathy-Scale.pdf</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "77842",
      "postDate": "05/11/2015 05:31:55",
      "content": "<p>[quote=sumanayimman;77833]</p>\n<p>Reference that state follow link below :&nbsp;</p>\n<p>http://www.icoph.org/downloads/Diabetic-Retinopathy-Scale.pdf</p>\n<p>[/quote]</p>\n<p>Thanks. Here is the scale from the document:</p>\n<p>0=No Apparent Retinopathy <br>&#8364; No abnormalities</p>\n<p>1=Mild Non-Proliferative Diabetic Retinopathy <br>&#8364; Microaneurysms only</p>\n<p>2= Moderate Non-Proliferative Diabetic Retinopathy <br>&#8364; More than just microaneurysms but less than Severe NPDR</p>\n<p>3= Severe Non-Proliferative Diabetic Retinopathy <br>Any of the following: <br>&#8364; More than 20 intraretinal hemorrhages in each of 4 quadrants <br>&#8364; Definite venous beading in 2+ quadrants <br>&#8364; Prominent IRMA in 1+ quadrant And no signs of proliferative retinopathy</p>\n<p>4= Proliferative Diabetic Retinopathy <br>One or more of the following: <br>&#8364; Neovascularization <br>&#8364; Vitreous/preretinal hemorrhage</p>\n<p>Now to figure out how to make these into an algorithm ;-)</p>\n<p>BTW--the definition for NPDR is (see http://www.geteyesmart.org/eyesmart/diseases/diabetic-retinopathy/index.cfm)</p>\n<p>Background or nonproliferative diabetic retinopathy (NPDR)<br>Nonproliferative diabetic retinopathy (NPDR) is the earliest stage of diabetic retinopathy. With this condition, damaged blood vessels in the retina begin to leak extra fluid and small amounts of blood into the eye. Sometimes, deposits of cholesterol or other fats from the blood may leak into the retina.</p>\n<p>NPDR can cause changes in the eye, including:</p>\n<p>Microaneurysms: small bulges in blood vessels of the retina that often leak fluid.<br> Retinal hemorrhages: tiny spots of blood that leak into the retina.<br> Hard exudates: deposits of cholesterol or other fats from the blood that have leaked into the retina.<br> Macular edema: swelling or thickening of the macula caused by fluid leaking from the retina's blood vessels. The macula doesn't function properly when it is swollen. Macular edema is the most common cause of vision loss in diabetes.<br> Macular ischemia: small blood vessels (capillaries) close. Your vision blurs because the macula no longer receives enough blood to work properly.</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "77869",
      "postDate": "05/11/2015 09:44:26",
      "content": "<p>Thank you very much for the details.</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "77874",
      "postDate": "05/11/2015 10:29:07",
      "content": "<p>Hi, How to define the 'quadrants' ?</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "80061",
      "postDate": "05/26/2015 18:38:33",
      "content": "<p>re quadrants, I think:</p>\n<p>&nbsp;<img src=\"http://openi.nlm.nih.gov/imgs/512/70/3083760/3083760_TONEUJ-5-1_F1.png\" alt=\"quadrants\" width=\"433\" height=\"244\"></p>\n\n<p>the optic nerve is nasal</p>",
      "rawMarkdown": "",
      "votes": null
    }
  ],
  "comments": [
    {
      "id": 77231,
      "author_name": "jstaker7",
      "author_url": "",
      "post_date": "05/06/2015 04:21:48",
      "content": "<p>A single microaneurysm is enough to make it a 1. They are hard to differentiate just by casual glance because microaneurysms are no bigger than a few dozen pixels in diameter even in the full resolution images.&nbsp;</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 77563,
      "author_name": "bobalv",
      "author_url": "",
      "post_date": "05/08/2015 02:34:58",
      "content": "<p>[quote=jstaker7;77231]</p>\n<p>A single microaneurysm is enough to make it a 1. They are hard to differentiate just by casual glance because microaneurysms are no bigger than a few dozen pixels in diameter even in the full resolution images.&nbsp;</p>\n<p>[/quote]</p>\n<p>Do you have a reference for this?</p>\n<p>Better yet would be a reference or references that stated the criteria for the different categories.</p>\n<p>But any reference on the topic of the criteria for the categories would help ;-)</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 77833,
      "author_name": "sumanayimman1",
      "author_url": "",
      "post_date": "05/11/2015 01:31:38",
      "content": "<p>Reference that state follow link below :&nbsp;</p>\n<p>http://www.icoph.org/downloads/Diabetic-Retinopathy-Scale.pdf</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 77842,
      "author_name": "bobalv",
      "author_url": "",
      "post_date": "05/11/2015 05:31:55",
      "content": "<p>[quote=sumanayimman;77833]</p>\n<p>Reference that state follow link below :&nbsp;</p>\n<p>http://www.icoph.org/downloads/Diabetic-Retinopathy-Scale.pdf</p>\n<p>[/quote]</p>\n<p>Thanks. Here is the scale from the document:</p>\n<p>0=No Apparent Retinopathy <br>&#8364; No abnormalities</p>\n<p>1=Mild Non-Proliferative Diabetic Retinopathy <br>&#8364; Microaneurysms only</p>\n<p>2= Moderate Non-Proliferative Diabetic Retinopathy <br>&#8364; More than just microaneurysms but less than Severe NPDR</p>\n<p>3= Severe Non-Proliferative Diabetic Retinopathy <br>Any of the following: <br>&#8364; More than 20 intraretinal hemorrhages in each of 4 quadrants <br>&#8364; Definite venous beading in 2+ quadrants <br>&#8364; Prominent IRMA in 1+ quadrant And no signs of proliferative retinopathy</p>\n<p>4= Proliferative Diabetic Retinopathy <br>One or more of the following: <br>&#8364; Neovascularization <br>&#8364; Vitreous/preretinal hemorrhage</p>\n<p>Now to figure out how to make these into an algorithm ;-)</p>\n<p>BTW--the definition for NPDR is (see http://www.geteyesmart.org/eyesmart/diseases/diabetic-retinopathy/index.cfm)</p>\n<p>Background or nonproliferative diabetic retinopathy (NPDR)<br>Nonproliferative diabetic retinopathy (NPDR) is the earliest stage of diabetic retinopathy. With this condition, damaged blood vessels in the retina begin to leak extra fluid and small amounts of blood into the eye. Sometimes, deposits of cholesterol or other fats from the blood may leak into the retina.</p>\n<p>NPDR can cause changes in the eye, including:</p>\n<p>Microaneurysms: small bulges in blood vessels of the retina that often leak fluid.<br> Retinal hemorrhages: tiny spots of blood that leak into the retina.<br> Hard exudates: deposits of cholesterol or other fats from the blood that have leaked into the retina.<br> Macular edema: swelling or thickening of the macula caused by fluid leaking from the retina's blood vessels. The macula doesn't function properly when it is swollen. Macular edema is the most common cause of vision loss in diabetes.<br> Macular ischemia: small blood vessels (capillaries) close. Your vision blurs because the macula no longer receives enough blood to work properly.</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 77869,
      "author_name": "thewinner",
      "author_url": "",
      "post_date": "05/11/2015 09:44:26",
      "content": "<p>Thank you very much for the details.</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 77874,
      "author_name": "thewinner",
      "author_url": "",
      "post_date": "05/11/2015 10:29:07",
      "content": "<p>Hi, How to define the 'quadrants' ?</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 80061,
      "author_name": "ilyakava",
      "author_url": "",
      "post_date": "05/26/2015 18:38:33",
      "content": "<p>re quadrants, I think:</p>\n<p>&nbsp;<img src=\"http://openi.nlm.nih.gov/imgs/512/70/3083760/3083760_TONEUJ-5-1_F1.png\" alt=\"quadrants\" width=\"433\" height=\"244\"></p>\n\n<p>the optic nerve is nasal</p>",
      "votes": null,
      "replies": []
    }
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