Sagittal Image Dataset Corrected to Natural Head Position from a Mixed Ethnicity Population.
Description
This dataset contains 200 sagittal projection images from CBCT scans, meticulously aligned with Natural Head Position (NHP) standards set by Fredrik Lundström and Anders Lundström. Originating from orthodontic patients in Cali, Colombia, it includes images from the start and during treatment phases. Divided evenly between 100 female (CoF) and 100 male (CoM) subjects, it supports gender-specific research. Accompanying the images is an Excel file, "Data info.xlsx," which records rotational angles in Yaw, Roll, and Pitch, plus pixel sizes and dimensions, enabling accurate study replication and facilitating detailed cephalometric analysis.
Files
Steps to reproduce
For the development of a corrected sagittal image dataset, a meticulous three-phase approach was employed. The process began with the normalization of CBCT scan slices in RAI orientation using DICOM metadata, ensuring consistent head positioning from right to left, anterior to posterior, and inferior to superior. This standardization provides a stable foundation for further analysis. The next phase involved calculating rotational angles in three key anatomical planes using anatomical references with minimal asymmetry. In the axial plane, angles were determined by the alignment of the frontozygomatic sutures, while in the coronal plane, measurements were based on the centroids of ocular cavities. For the sagittal plane, the angle adjustments were made according to established cephalometric standards, setting pitch rotation angles to 3.8° for men and 4.1° for women, as recommended by cephalometric experts Fredrik Lundström and Anders Lundström. The final step involved synthesizing these adjusted scans to create a radiographic equivalent of a sagittal image, fully corrected for Natural Head Position (NHP). This standardized and precise method ensures the dataset is optimal for advanced orthodontic and maxillofacial research and applications, providing a valuable resource for detailed anatomical and diagnostic studies.