SynthesisDento maxillo facial radiology2022
Can gray values be converted to Hounsfield units? A systematic review.
Synthesis in Dento maxillo facial radiology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
26 citing papers in PubMed.
- Cone-beam computed tomography-based radiomic analysis of architectural phenotypes in jaw cysts and tumors using interpretable artificial intelligence models.World journal of radiology · 2026Article
- Frequency and Systemic Associations of Focal Low-Trabeculation/Low-Density Intramedullary Jawbone Findings: A Retrospective CBCT Study.Journal of clinical medicine · 2026Article
- Reproducibility of Three-Dimensional Facial Surface Models Generated from Repeated CT and CBCT Scans: An Ex Vivo Study.Diagnostics (Basel, Switzerland) · 2026Article
- Response to the letter to the editor "Clinical and radiographic assessment of effect of platelet rich fibrin on dental implant osseointegration - A split mouth randomized clinical trial".Journal of prosthodontics : official journal of the American College of Prosthodontists · 2026Article
- Comparison of compaction techniques for filling isthmuses using Biodentine in mandibular molars.BMC oral health · 2026Article
- Assessment of bone density around impacted maxillary canine teeth by gray value analysis on cone-beam computed tomography images.BMC oral health · 2026Article
- Prevalence, extent and surrounding bone density of ankylosed impacted maxillary canines.BMC oral health · 2026Article
- Development and Radiological Evaluation of 3D-Printed Patient-Specific Lung Phantoms: From CT Imaging to 3D Modeling and Material Characterization.Research square · 2026Article
- Comparative Evaluation of Buccal Cortical Bone Thickness in the Posterior Mandible Across Skeletal Patterns: A CBCT Study in a Sample of Iranians.International journal of dentistry · 2026Article
- Relationship between Voxel Value of Cone Beam CT and Hounsfield Unit of CT: Systematic Review and Meta-Analysis.Frontiers in dentistry · 2026Article
- Platelet-Rich Fibrin and Its Derivatives as Adjuncts to Dental Implant Osseointegration: A Scoping Review.International journal of dentistry · 2026Review
- The relationship between enamel and dentin calibrated-radiographic-density measured by cone beam computed tomography and dental caries status in young adults.BMC oral health · 2025Article
- Automated orofacial virtual patient creation using two cohorts of MSCT vs. CBCT scans.Head & face medicine · 2025Article
- Unveiling Software Limitations in the Assessment of the Minimum Sectional Area and Volume in Cleft LIP and Palate Patients.Life (Basel, Switzerland) · 2025Article
- Reliability assessment of craniofacial and airway measurements: a comparative study between multidetector computed tomography and cone-beam computed tomography.The Angle orthodontist · 2025Article
- The Impact of Therapeutic Ultrasound on Bone Radio Density Following Orthodontic Treatment with Clear Aligners: A Preliminary StudyCurrent medical imaging · 2025Article
- Accuracy of the Hounsfield Unit Values Measured by Implant Planning Software.Dentistry journal · 2024Article
- Preoperative assessment of bone density for dental implantation: a comparative study of three different ROI methods.Head & face medicine · 2024Article
- Biomaterials and Clinical Application of Dental Implants in Relation to Bone Density-A Narrative Review.Journal of clinical medicine · 2023Review
- Assessment of CBCT gray value in different regions-of-interest and fields-of-view compared to Hounsfield unit.Dento maxillo facial radiology · 2023Article
Corrections and comments
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Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectivesThe purpose of this systematic review was to answer the focus question: "Could the gray values (GVs) from CBCT (cone beam computed tomography) be converted to Hounsfield units (HUs) in multidetector computed tomography (MDCT)?"
methodsThe included studies try to answer the research question according to the PICO strategy. Studies were gathered by searching several electronic databases and partial grey literature up to January 2021 without language or time restrictions. The methodological assessment of the studies was performed using The Oral Health Assessment Tool (OHAT) for
results2710 articles were obtained in Phase 1, and 623 citations remained after removing duplicates. Only three studies were included in this review using a two-phase selection process and after applying the eligibility criteria. All studies were methodologically acceptable, although in general terms with low risks of bias. There are some included studies with quite low and limited evidence estimations and recommendation forces; evidencing the need for clinical studies with diagnostic capacity to support its use.
conclusionsThis systematic review demonstrated that the GVs from CBCT cannot be converted to HUs due to the lack of clinical studies with diagnostic capacity to support its use. However, it is evidenced that three conversion steps (equipment calibration, prediction equation models, and a standard formula (converting GVs to HUs)) are needed to obtain pseudo Hounsfield values instead of only obtaining them from a regression or directly from the software.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.