{
  "id": 596183,
  "title": "Scout/Localizer slices found at series start or end",
  "url": "/competitions/rsna-intracranial-aneurysm-detection/discussion/596183",
  "author_name": "Akima",
  "post_date": "2025-08-02T04:31:10.366000",
  "votes": 8,
  "comment_count": 3,
  "views": 0,
  "content": "<p>I attempted to build 3D volumes by stacking DICOMs for each SeriesInstanceUID in ascending InstanceNumber order, but in 38 cases the image sizes did not match and volume creation failed.</p>\n<p>Investigation revealed suspected Scout/Localizer slices near the beginning and end of each series.</p>\n<p><strong>Examples</strong></p>\n<ul>\n<li><p><strong>UID: 1.2.826.0.1.3680043.8.498.39467198872118696167396371980096058294</strong><br>\n<img src=\"https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F5850745%2Fa246c7a1191a15450a7dffda1fe46e02%2F1.2.826.0.1.3680043.8.498.39467198872118696167396371980096058294.png?generation=1754108358058216&amp;alt=media\" alt=\"\"></p></li>\n<li><p><strong>UID: 1.2.826.0.1.3680043.8.498.93644328382236448421915604596808868780</strong><br>\n<img src=\"https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F5850745%2Fe16a6196ab6677a52ce32d2d9c386b9b%2F1.2.826.0.1.3680043.8.498.93644328382236448421915604596808868780.png?generation=1754108370947077&amp;alt=media\" alt=\"\"></p></li>\n<li><p><strong>UID: 1.2.826.0.1.3680043.8.498.43502795339700498960289295234851562632</strong><br>\n<img src=\"https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F5850745%2Fea0181450ca69b2ac0604ec35dfc8220%2F1.2.826.0.1.3680043.8.498.43502795339700498960289295234851562632.png?generation=1754108346178312&amp;alt=media\" alt=\"\"></p></li>\n</ul>\n<p>For full details, please refer to the notebook -&gt; <a href=\"https://www.kaggle.com/code/tanakatentyo/rsna2025-dicom-size-mismatch-example?scriptVersionId=253776374\" target=\"_blank\">here</a></p>",
  "messages": [
    {
      "id": 3261718,
      "postDate": "2025-08-02T04:31:10.367Z",
      "content": "<p>I attempted to build 3D volumes by stacking DICOMs for each SeriesInstanceUID in ascending InstanceNumber order, but in 38 cases the image sizes did not match and volume creation failed.</p>\n<p>Investigation revealed suspected Scout/Localizer slices near the beginning and end of each series.</p>\n<p><strong>Examples</strong></p>\n<ul>\n<li><p><strong>UID: 1.2.826.0.1.3680043.8.498.39467198872118696167396371980096058294</strong><br>\n<img src=\"https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F5850745%2Fa246c7a1191a15450a7dffda1fe46e02%2F1.2.826.0.1.3680043.8.498.39467198872118696167396371980096058294.png?generation=1754108358058216&amp;alt=media\" alt=\"\"></p></li>\n<li><p><strong>UID: 1.2.826.0.1.3680043.8.498.93644328382236448421915604596808868780</strong><br>\n<img src=\"https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F5850745%2Fe16a6196ab6677a52ce32d2d9c386b9b%2F1.2.826.0.1.3680043.8.498.93644328382236448421915604596808868780.png?generation=1754108370947077&amp;alt=media\" alt=\"\"></p></li>\n<li><p><strong>UID: 1.2.826.0.1.3680043.8.498.43502795339700498960289295234851562632</strong><br>\n<img src=\"https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F5850745%2Fea0181450ca69b2ac0604ec35dfc8220%2F1.2.826.0.1.3680043.8.498.43502795339700498960289295234851562632.png?generation=1754108346178312&amp;alt=media\" alt=\"\"></p></li>\n</ul>\n<p>For full details, please refer to the notebook -&gt; <a href=\"https://www.kaggle.com/code/tanakatentyo/rsna2025-dicom-size-mismatch-example?scriptVersionId=253776374\" target=\"_blank\">here</a></p>",
      "rawMarkdown": "I attempted to build 3D volumes by stacking DICOMs for each SeriesInstanceUID in ascending InstanceNumber order, but in 38 cases the image sizes did not match and volume creation failed.\n\nInvestigation revealed suspected Scout/Localizer slices near the beginning and end of each series.\n\n**Examples**\n- **UID: 1.2.826.0.1.3680043.8.498.39467198872118696167396371980096058294**\n![](https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F5850745%2Fa246c7a1191a15450a7dffda1fe46e02%2F1.2.826.0.1.3680043.8.498.39467198872118696167396371980096058294.png?generation=1754108358058216&alt=media)\n\n- **UID: 1.2.826.0.1.3680043.8.498.93644328382236448421915604596808868780**\n![](https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F5850745%2Fe16a6196ab6677a52ce32d2d9c386b9b%2F1.2.826.0.1.3680043.8.498.93644328382236448421915604596808868780.png?generation=1754108370947077&alt=media)\n\n- **UID: 1.2.826.0.1.3680043.8.498.43502795339700498960289295234851562632**\n![](https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F5850745%2Fea0181450ca69b2ac0604ec35dfc8220%2F1.2.826.0.1.3680043.8.498.43502795339700498960289295234851562632.png?generation=1754108346178312&alt=media)\n\n\nFor full details, please refer to the notebook -> [here](https://www.kaggle.com/code/tanakatentyo/rsna2025-dicom-size-mismatch-example?scriptVersionId=253776374)",
      "votes": 8
    },
    {
      "id": 3265662,
      "postDate": "2025-08-07T20:08:36.597Z",
      "content": "<p>Thanks for your post. This reflects real world data, so we are planning to leave this as is.</p>",
      "rawMarkdown": "Thanks for your post. This reflects real world data, so we are planning to leave this as is.",
      "votes": 2
    },
    {
      "id": 3262735,
      "postDate": "2025-08-04T07:45:38.830Z",
      "content": "<p>Nice catch!</p>\n<p>Did you see anything in the metadata that we could use to filter these out? </p>",
      "rawMarkdown": "Nice catch!\n\nDid you see anything in the metadata that we could use to filter these out? ",
      "replies": [
        {
          "id": 3262836,
          "postDate": "2025-08-04T10:39:03.530Z",
          "content": "<p><a href=\"https://www.kaggle.com/fnands\" target=\"_blank\">@fnands</a> <br>\nThank you!<br>\nSo far, what I know is that scout/localizer slices differ in image size from the other images; this is true for all 38 cases, and I have not been able to find any differences in other metadata.</p>",
          "rawMarkdown": "@fnands \nThank you!\nSo far, what I know is that scout/localizer slices differ in image size from the other images; this is true for all 38 cases, and I have not been able to find any differences in other metadata."
        }
      ]
    }
  ],
  "comments": [
    {
      "id": 3265662,
      "author_name": "Evan Calabrese",
      "author_url": "",
      "post_date": "2025-08-07T20:08:36.597000",
      "content": "<p>Thanks for your post. This reflects real world data, so we are planning to leave this as is.</p>",
      "votes": 2,
      "replies": []
    },
    {
      "id": 3262735,
      "author_name": "fnands",
      "author_url": "",
      "post_date": "2025-08-04T07:45:38.830000",
      "content": "<p>Nice catch!</p>\n<p>Did you see anything in the metadata that we could use to filter these out? </p>",
      "votes": 0,
      "replies": [
        {
          "id": 3262836,
          "author_name": "Akima",
          "author_url": "",
          "post_date": "2025-08-04T10:39:03.530000",
          "content": "<p><a href=\"https://www.kaggle.com/fnands\" target=\"_blank\">@fnands</a> <br>\nThank you!<br>\nSo far, what I know is that scout/localizer slices differ in image size from the other images; this is true for all 38 cases, and I have not been able to find any differences in other metadata.</p>",
          "votes": 0,
          "replies": []
        }
      ]
    }
  ],
  "raw_markdown_by_id": {
    "3261718": "I attempted to build 3D volumes by stacking DICOMs for each SeriesInstanceUID in ascending InstanceNumber order, but in 38 cases the image sizes did not match and volume creation failed.\n\nInvestigation revealed suspected Scout/Localizer slices near the beginning and end of each series.\n\n**Examples**\n- **UID: 1.2.826.0.1.3680043.8.498.39467198872118696167396371980096058294**\n![](https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F5850745%2Fa246c7a1191a15450a7dffda1fe46e02%2F1.2.826.0.1.3680043.8.498.39467198872118696167396371980096058294.png?generation=1754108358058216&alt=media)\n\n- **UID: 1.2.826.0.1.3680043.8.498.93644328382236448421915604596808868780**\n![](https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F5850745%2Fe16a6196ab6677a52ce32d2d9c386b9b%2F1.2.826.0.1.3680043.8.498.93644328382236448421915604596808868780.png?generation=1754108370947077&alt=media)\n\n- **UID: 1.2.826.0.1.3680043.8.498.43502795339700498960289295234851562632**\n![](https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F5850745%2Fea0181450ca69b2ac0604ec35dfc8220%2F1.2.826.0.1.3680043.8.498.43502795339700498960289295234851562632.png?generation=1754108346178312&alt=media)\n\n\nFor full details, please refer to the notebook -> [here](https://www.kaggle.com/code/tanakatentyo/rsna2025-dicom-size-mismatch-example?scriptVersionId=253776374)",
    "3265662": "Thanks for your post. This reflects real world data, so we are planning to leave this as is.",
    "3262735": "Nice catch!\n\nDid you see anything in the metadata that we could use to filter these out? "
  }
}