# CT imagery / CT 影像

## Abdominal CT / 腹部 CT

**SPL Abdominal Atlas — Florin Talos, Marianna Jakab, Ron Kikinis.**
Surgical Planning Laboratory, Brigham and Women's Hospital. Source version: abdomen-2016-09.

- [Official atlas and attribution / 官方圖譜](https://www.openanatomy.org/atlas-pages/atlas-spl-abdomen.html)
- [Original CT / 原始 CT](https://www.openanatomy.org/atlases/nac/abdomen-2016-09/Data/I.nrrd)
- [Complete 3D Slicer License Part B, including required preface / 完整授權](../models/OPENANATOMY-SLICER-LICENSE.txt)
- [Technical metadata, source hash, transforms and coverage / 來源雜湊、座標轉換、適用範圍](catalog.json)

The source atlas's license and attribution remain attached to this image derivative. The full original Part B license, with its specified preamble, accompanies this distribution. Source funding acknowledgments include Neuroimaging Analysis Center grants P41 RR013218 and P41 EB015902 and the Google Faculty Research Award, as recorded on the atlas page. Source institutions, authors and funders do not endorse this platform.

Adapted by **HON INTERNATIONAL TRADE / Assemble Human**, 2026-09-11. The original signed 16-bit voxel samples are preserved exactly. The NRRD technical header is removed from the browser data file; samples are packaged with lossless gzip compression. The viewer displays axial, coronal and sagittal planes, with user-adjustable grayscale windowing. HU calibration has not been independently established.

Image voxel coordinates are converted from LPS to the atlas's shared world coordinates. Alignment uses a common rotation, uniform scale and translation, either based on eight thoracolumbar vertebrae or those vertebrae plus liver, pancreas and spleen. These are geometric fits across different subjects, not clinical registration accuracy. No per-organ local displacement, mirroring or image deformation is applied to the CT. The production kidneys' individually approved local translations are not additional CT transforms.

The CT button is offered only when selected models include a known source counterpart overlapping the image volume. This does not mean the scan depicts the entire selected learning unit. The CT plane is displayed directly in the existing anatomy scene, sharing the same camera and rotation controls. A gold border marks its position; the slider or optional playback moves the plane through the volume. Surrounding models temporarily fade without changing saved transparency values. Closing CT restores their display. Source geometry, assembly progress and layer offsets are preserved. Layer-separated models are displaced for presentation and therefore no longer align with the fixed CT coordinates. The current anatomical models retain their separate [Z-Anatomy / BodyParts3D / SPL source licenses](../models/ATTRIBUTION.md).

**本展示整合多個資料來源，經多角度對位與重合調整。模型及影像的位置、形狀僅供參考，須考量個體差異。僅供教學與學習，不得用於診斷、治療或手術決策。**

This display combines multiple data sources with alignment from multiple views. Model and image positions and shapes are approximate and subject to individual anatomical variation. For teaching and learning only; not for diagnosis, treatment or surgical decisions.


## Image extent / 影像涵蓋範圍

This is an abdominal scan with 113 source axial slices, not a complete chest CT. The first and last slice positions are the scan's actual boundaries. With the rib-cage learning unit selected, this image overlaps only its lower portion; the upper chest was not included in this scan. No missing slices are synthesized, and the volume is not stretched or moved upward to imply complete thoracic coverage.

這套資料是腹部掃描，共 113 張原始水平切片，並非完整胸腔 CT。第一張、最後一張的位置是原掃描的邊界。選擇「胸廓」時只能對照胸廓下段，上胸部不在這套影像範圍內。未合成缺少的切片，也不把影像拉長或向上移動來假裝涵蓋完整胸腔。

## Thoracic CT / 胸腔 CT

**Mauritanian Anatomy Laboratory Thoracic Atlas — Haythem Guermazi, Ahmedou Moulaye IDRISS, Tfeil Yahya.**

Anatomy Lab, Faculty of Medicine, University of Nouakchott Al Aasriya (UNA), Mauritania; Cardiovascular National Centre, Nouakchott, Mauritania. Other contributors: Khaled Boye; MACBiolDi Project, ULPGC, Canary Islands, Spain. Atlas release: January 2021; source directory version: thorax-2020-11-15.

- [Official atlas and attribution / 官方圖譜與署名](https://www.openanatomy.org/atlas-pages/atlas-mauritania-thorax.html)
- [Original CT-256.nrrd / 原始影像](https://www.openanatomy.org/atlases/macbioidi/mauritania/thorax-2020-11-15/Data/CT-256.nrrd)
- [Complete 3D Slicer License Part B, including required preface / 完整授權與前言](../models/OPENANATOMY-SLICER-LICENSE.txt)
- [Technical metadata, original and derived hashes / 技術資料與雜湊](catalog.json)

Source funding acknowledgments, as recorded on the official atlas page: P41 RR013218/RR/NCRR NIH HHS/United States; P41 EB015902/EB/NIBIB NIH HHS/United States; Neuroimaging Analysis Center, NIH NCRR and NIBIB, and Google Faculty Research Award. Authors, institutions and funders do not endorse this platform. The full original Part B license and its required preamble accompany the image derivative.

Adapted by **HON INTERNATIONAL TRADE / Assemble Human**, 2026-09-11. The original 256 × 256 × 232 signed 16-bit samples from CT-256.nrrd are preserved exactly; the header is removed and samples are packaged with lossless gzip. Source LPS coordinates are converted into the model scene with the same single rotation, uniform scale and translation used for the thoracic model comparison, fitted to thoracic vertebrae, ribs and sternum. Slice pixels, direction labels and plane geometry retain the source orientation. Grayscale windowing is adjustable; HU calibration has not been independently established. This release adopts the CT image; the thoracic candidate surface models remain in the comparison inventory, not newly published model packages.

Source labelmap/surface coordinate checks on the left upper lung lobe, right lower lung lobe and manubrium agree within 0.81 mm at their bounds. The distributed right upper lung lobe surface and labelmap have a posterior-bound discrepancy of 7.62 mm; it is recorded in the preparation audit. These checks establish image/source coordinate consistency, not agreement with this atlas's different subject or clinical accuracy.

胸腔影像共 232 張原始水平切片，涵蓋範圍以原掃描為限，不延伸或補造缺少的部位。保留原始灰階數值，僅移除標頭、無損壓縮，並以胸椎、肋骨及胸骨作共同縮放、旋轉與平移。未對每個器官分別移動影像，也未作影像變形。

## Selecting separate scans / 選擇獨立影像

The CT menu offers scans relevant to the selected models. Only one volume is displayed at a time, directly in the existing 3D scene. The thoracic and abdominal scans come from different source datasets and retain independent orientations and transforms. They are not stitched, fused, or resampled into one world-horizontal image stack. “Axial / 水平” refers to each source's axial image plane; after alignment, that plane may be tilted relative to the atlas's horizontal plane. Source slice numbering follows the original voxel order. Selection does not establish complete coverage of a learning unit. Separating model layers moves the models away from their CT alignment.

CT 選單只列出與目前模型相關的影像，每次顯示其中一套。胸腔與腹部影像各自保留原掃描座標和對位角度，未拼成一套，也未重新取樣為共同的世界水平面。「水平」指該套來源影像的水平切面，對位後可能相對圖庫水平面傾斜。切片編號依來源體素順序排列。模型分層移開後不再與原 CT 座標重合。

**模型與影像來自不同資料來源，經多角度對位；位置、形狀及重合僅供參考，須考量個體差異。僅供教學，不得用於診斷、治療或手術決策。**

Models and images come from different sources and subjects and are aligned from multiple views. Positions, shapes and overlap are approximate and subject to individual variation. For teaching only; not for diagnosis, treatment or surgical decisions.