• Assessment of TrueBeam kV Cone...

Treffer: Assessment of TrueBeam kV Cone-Beam CT Image Quality and the Clinical Impact of Calibration Drift.

Title:
Assessment of TrueBeam kV Cone-Beam CT Image Quality and the Clinical Impact of Calibration Drift.
Authors:
Clinto CO; Department of Physics, Noorul Islam Centre for Higher Education, Kumaracoil, Kanyakumari, Tamil Nadu, India.; Department of Radiation Oncology, Aster Medcity, Kochi, Kerala, India., Bindhu B; Department of Physics, Noorul Islam Centre for Higher Education, Kumaracoil, Kanyakumari, Tamil Nadu, India.
Source:
Asian Pacific journal of cancer prevention : APJCP [Asian Pac J Cancer Prev] 2025 Dec 01; Vol. 26 (12), pp. 4563-4568. Date of Electronic Publication: 2025 Dec 01.
Publication Type:
Journal Article
Language:
English
Journal Info:
Publisher: Asian Pacific Organization for Cancer Prevention Country of Publication: Thailand NLM ID: 101130625 Publication Model: Electronic Cited Medium: Internet ISSN: 2476-762X (Electronic) Linking ISSN: 15137368 NLM ISO Abbreviation: Asian Pac J Cancer Prev Subsets: MEDLINE
Imprint Name(s):
Original Publication: Bangkok : Asian Pacific Organization for Cancer Prevention,
MeSH Terms:
Cone-Beam Computed Tomography*/methods , Cone-Beam Computed Tomography*/instrumentation , Prostatic Neoplasms*/diagnostic imaging , Prostatic Neoplasms*/radiotherapy , Image Processing, Computer-Assisted*/methods , Tongue Neoplasms*/diagnostic imaging , Radiographic Image Interpretation, Computer-Assisted*/methods, Humans ; Calibration ; Male ; Signal-To-Noise Ratio ; Phantoms, Imaging ; Pelvis/diagnostic imaging ; Algorithms ; Radiotherapy Planning, Computer-Assisted/methods ; Prognosis
Contributed Indexing:
Keywords: CBCT image quality; calibration drift; iterative reconstruction
Entry Date(s):
Date Created: 20251229 Date Completed: 20251229 Latest Revision: 20251229
Update Code:
20251229
DOI:
10.31557/APJCP.2025.26.12.4563
PMID:
41459870
Database:
MEDLINE

Weitere Informationen

Background: This study compared the image quality of the TrueBeam (TB) kilo-voltage cone-beam CT (CBCT) system using standard reconstruction (TB-sCBCT) and iterative reconstruction (TB-iCBCT) with that of the Halcyon iterative CBCT (H-iCBCT). Additionally, the clinical impact of calibration drift over a one-year period was investigated for both head and pelvis imaging modes.
Methods: Image quality and calibration were assessed using the Catphan®. Image quality evaluation included the analysis of signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), and low-contrast detectability. Calibration stability for head and pelvis CBCT modes was examined by comparing dose-volume histogram (DVH) parameters across ten tongue and ten prostate patient cases.
Results: The average SNR was 3.1 for TB-sCBCT, 23.1 for TB-iCBCT, and 6.9 for H-iCBCT, while the corresponding CNR values were 11.2, 53.0, and 28.4, respectively. At a contrast level of 0.3%, the smallest detectable target diameters were 15 mm for TB-sCBCT, 8 mm for TB-iCBCT, and 9 mm for H-iCBCT. Over a one-year period, the Hounsfield Unit (HU) variation in the head CBCT mode exceeded the recommended action threshold of ±50 HU, whereas the pelvis CBCT mode remained within acceptable limits.
Conclusion: In the TB system, advanced iterative reconstruction algorithms significantly enhance SNR and CNR by effectively reducing image noise. Halcyon provides improved image quality compared to TB with standard reconstruction; however, it remains inferior to TB-iCBCT. HU deviations were more pronounced in head CBCT than in pelvis mode, although HU variation in the pelvis CBCT mode exhibited greater sensitivity regarding clinical impact.