{
  "id": 431665,
  "title": "A little bit of data leakage :)",
  "url": "/competitions/rsna-2023-abdominal-trauma-detection/discussion/431665",
  "author_name": "JanGlinko2",
  "post_date": "2023-08-14T12:31:00.450000",
  "votes": 18,
  "comment_count": 5,
  "views": 0,
  "content": "<p>Hey!<br>\nI was talking with someone doing CT scans for a living.<br>\nThere should be no hands on the CT scan. Hand on the CT scan means someone had a problem with raising their hand up, probably due to some pain (injury). <br>\nThis is an example. The hand is visible on the left and there is fluid around the spleen.<br>\n<img src=\"https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F5506850%2F965f56fe7ceeed8c465926de734519df%2Fkaggle.png?generation=1692016182573899&amp;alt=media\" alt=\"\"></p>",
  "messages": [
    {
      "id": 2390186,
      "postDate": "2023-08-14T12:31:00.450Z",
      "content": "<p>Hey!<br>\nI was talking with someone doing CT scans for a living.<br>\nThere should be no hands on the CT scan. Hand on the CT scan means someone had a problem with raising their hand up, probably due to some pain (injury). <br>\nThis is an example. The hand is visible on the left and there is fluid around the spleen.<br>\n<img src=\"https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F5506850%2F965f56fe7ceeed8c465926de734519df%2Fkaggle.png?generation=1692016182573899&amp;alt=media\" alt=\"\"></p>",
      "rawMarkdown": "Hey!\nI was talking with someone doing CT scans for a living.\nThere should be no hands on the CT scan. Hand on the CT scan means someone had a problem with raising their hand up, probably due to some pain (injury). \nThis is an example. The hand is visible on the left and there is fluid around the spleen.\n![](https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F5506850%2F965f56fe7ceeed8c465926de734519df%2Fkaggle.png?generation=1692016182573899&alt=media)",
      "votes": 17
    },
    {
      "id": 2390608,
      "postDate": "2023-08-14T16:42:56.427Z",
      "content": "<p>That's an interesting observation! Just note that there are many injuries that could prevent someone from moving their arm that we aren't scoring for purposes of this competition.</p>",
      "rawMarkdown": "That's an interesting observation! Just note that there are many injuries that could prevent someone from moving their arm that we aren't scoring for purposes of this competition.",
      "votes": 3,
      "replies": [
        {
          "id": 2390727,
          "postDate": "2023-08-14T17:39:33.563Z",
          "content": "<p>Totally agree, just wanted to share this insight for the equality of the competition. It reminds me of the AMP Parkinson situation, where people discovered that missing observations at certain moments mean the patient is healthy. <br>\nThe RSNA could even use different patient positioning for CT scans (I don't know much about this examination and I could misunderstand something) and those hands are meaningless.</p>",
          "rawMarkdown": "Totally agree, just wanted to share this insight for the equality of the competition. It reminds me of the AMP Parkinson situation, where people discovered that missing observations at certain moments mean the patient is healthy. \nThe RSNA could even use different patient positioning for CT scans (I don't know much about this examination and I could misunderstand something) and those hands are meaningless.",
          "votes": 2
        }
      ]
    },
    {
      "id": 2397133,
      "postDate": "2023-08-18T18:34:58.530Z",
      "content": "<p>Thanks for sharing, I am new to some of the terms, so I have the 2 questions:</p>\n<p>1.Does data leakage mean that the model can abuse the unexpected data like the hands here to overfitting the model?<br>\n2.Why is the fluid around the spleen related to the hand you mentioned, or simply why you put two concepts in the same sentence?</p>",
      "rawMarkdown": "Thanks for sharing, I am new to some of the terms, so I have the 2 questions:\n\n1.Does data leakage mean that the model can abuse the unexpected data like the hands here to overfitting the model?\n2.Why is the fluid around the spleen related to the hand you mentioned, or simply why you put two concepts in the same sentence?"
    },
    {
      "id": 2399730,
      "postDate": "2023-08-20T14:49:34.197Z",
      "rawMarkdown": "",
      "isDeleted": true
    },
    {
      "id": 2395419,
      "postDate": "2023-08-17T14:41:35.700Z",
      "rawMarkdown": "",
      "votes": -1,
      "isDeleted": true
    }
  ],
  "comments": [
    {
      "id": 2390608,
      "author_name": "Sohier Dane",
      "author_url": "",
      "post_date": "2023-08-14T16:42:56.427000",
      "content": "<p>That's an interesting observation! Just note that there are many injuries that could prevent someone from moving their arm that we aren't scoring for purposes of this competition.</p>",
      "votes": 3,
      "replies": [
        {
          "id": 2390727,
          "author_name": "JanGlinko2",
          "author_url": "",
          "post_date": "2023-08-14T17:39:33.563000",
          "content": "<p>Totally agree, just wanted to share this insight for the equality of the competition. It reminds me of the AMP Parkinson situation, where people discovered that missing observations at certain moments mean the patient is healthy. <br>\nThe RSNA could even use different patient positioning for CT scans (I don't know much about this examination and I could misunderstand something) and those hands are meaningless.</p>",
          "votes": 2,
          "replies": []
        }
      ]
    },
    {
      "id": 2397133,
      "author_name": "Wei Yet",
      "author_url": "",
      "post_date": "2023-08-18T18:34:58.530000",
      "content": "<p>Thanks for sharing, I am new to some of the terms, so I have the 2 questions:</p>\n<p>1.Does data leakage mean that the model can abuse the unexpected data like the hands here to overfitting the model?<br>\n2.Why is the fluid around the spleen related to the hand you mentioned, or simply why you put two concepts in the same sentence?</p>",
      "votes": 0,
      "replies": []
    },
    {
      "id": 2399730,
      "author_name": "",
      "author_url": "",
      "post_date": "2023-08-20T14:49:34.197000",
      "content": "",
      "votes": 0,
      "replies": []
    },
    {
      "id": 2395419,
      "author_name": "",
      "author_url": "",
      "post_date": "2023-08-17T14:41:35.700000",
      "content": "",
      "votes": -1,
      "replies": []
    }
  ],
  "raw_markdown_by_id": {
    "2390186": "Hey!\nI was talking with someone doing CT scans for a living.\nThere should be no hands on the CT scan. Hand on the CT scan means someone had a problem with raising their hand up, probably due to some pain (injury). \nThis is an example. The hand is visible on the left and there is fluid around the spleen.\n![](https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F5506850%2F965f56fe7ceeed8c465926de734519df%2Fkaggle.png?generation=1692016182573899&alt=media)",
    "2390608": "That's an interesting observation! Just note that there are many injuries that could prevent someone from moving their arm that we aren't scoring for purposes of this competition.",
    "2397133": "Thanks for sharing, I am new to some of the terms, so I have the 2 questions:\n\n1.Does data leakage mean that the model can abuse the unexpected data like the hands here to overfitting the model?\n2.Why is the fluid around the spleen related to the hand you mentioned, or simply why you put two concepts in the same sentence?",
    "2399730": "",
    "2395419": ""
  }
}