This study evaluates the image quality of the new HyperSight CBCT imager, comparing it to fan-beam CT and two other CBCT imagers. The HyperSight CBCT imager, integrated into a ring-gantry treatment machine, features a large flat panel detector and advanced image reconstruction algorithms. Key assessments include metal artifact reduction (MAR), extended field-of-view (eFoV), phantom size dependency of CT numbers, and signal-to-noise (SNR) and contrast-to-noise (CNR) ratios. **Key Findings:** 1. **Metal Artifact Reduction:** MAR significantly improved image quality by reducing streak artifacts, with HyperSight CBCT showing comparable results to CT in terms of structural similarity index measure (SSIM) and root-mean-squared error (RMSE). 2. **Extended Field-of-View:** HyperSight CBCT demonstrated better geometrical accuracy in the eFoV compared to CT, as measured by the Jaccard Conformity Index, but had lower CT number accuracy outside the standard field-of-view (sFoV). 3. **Phantom Size Dependency:** HyperSight CBCT showed larger differences in CT numbers between different phantom sizes compared to CT, but still within acceptable limits for dose calculation. 4. **Image Noise and CNR:** HyperSight CBCT and CT demonstrated comparable image quality, with HyperSight CBCT showing a slight increase in SNR and CNR. **Conclusion:** The HyperSight CBCT imager offers improved image quality and noise reduction compared to previous CBCT imagers, with MAR and eFoV features that can enhance adaptive radiotherapy and optimize the workflow. The study provides crucial data for integrating these advanced features into clinical practice.This study evaluates the image quality of the new HyperSight CBCT imager, comparing it to fan-beam CT and two other CBCT imagers. The HyperSight CBCT imager, integrated into a ring-gantry treatment machine, features a large flat panel detector and advanced image reconstruction algorithms. Key assessments include metal artifact reduction (MAR), extended field-of-view (eFoV), phantom size dependency of CT numbers, and signal-to-noise (SNR) and contrast-to-noise (CNR) ratios. **Key Findings:** 1. **Metal Artifact Reduction:** MAR significantly improved image quality by reducing streak artifacts, with HyperSight CBCT showing comparable results to CT in terms of structural similarity index measure (SSIM) and root-mean-squared error (RMSE). 2. **Extended Field-of-View:** HyperSight CBCT demonstrated better geometrical accuracy in the eFoV compared to CT, as measured by the Jaccard Conformity Index, but had lower CT number accuracy outside the standard field-of-view (sFoV). 3. **Phantom Size Dependency:** HyperSight CBCT showed larger differences in CT numbers between different phantom sizes compared to CT, but still within acceptable limits for dose calculation. 4. **Image Noise and CNR:** HyperSight CBCT and CT demonstrated comparable image quality, with HyperSight CBCT showing a slight increase in SNR and CNR. **Conclusion:** The HyperSight CBCT imager offers improved image quality and noise reduction compared to previous CBCT imagers, with MAR and eFoV features that can enhance adaptive radiotherapy and optimize the workflow. The study provides crucial data for integrating these advanced features into clinical practice.