Adjust Patient Height Settings for Proper CBCT Exposure

migrated · imaging ct-scancalibration

Generated by docuprocessor (prompt article/v3) · 2026-04-22 14:08

Source thread

thread_id: spaces/AAAA05BdS6s/threads/NJZ6d-pjlCI · 8 msgs · first 2024-12-17 · participants: Tech ATech B

Tech A 2024-12-17 22:23

Guys QQ, for Bright Smile Dental, they took a scan on a patient, this is the first time this has happened to them, they're having issues with the exposure of the bone, the top of the image doesn't show fine, this patient has no teeth and the office told me it was a big guy, like tall. Does the patient has to do with the imaging? like having no teeth interfere with image? They had to use more exposure to get this image but the dr says is no good for diagnostic After they took this image, for the other patients it worked fine, so, I'm not sure where to look at, any idea what could have happened?

image/png image.png

The screen displays a **3D dental CBCT (cone beam CT) reconstruction** of what appears to be a maxillary or mandibular arch, rendered in a volumetric brown/tan color scheme against a black background. A **yellow crosshair/bounding box overlay** is visible, indicating an active region-of-interest (ROI) or slice-plane selection tool centered on the arch. The interface includes a **3D orientation head icon** in the upper-left corner and a **"Tools" panel tab** on the right edge; no error codes, numeric readouts, or warning messages are visible on screen.

Tech B 2024-12-17 22:27

all machines have settings for different patients height. Did they do it?

Tech A 2024-12-17 22:28

No, I don't think so - I can call to ask, but if so, where do they manage those settings?

Tech B 2024-12-17 22:29

https://www.youtube.com/watch?v=bBsRPXZz0xc

Tech B 2024-12-17 22:30

its on the acquisition screen - man, woman, child, or whatever settings they might have there

Tech B 2024-12-17 22:31

the interface might look different as this is for an older machine but the idea is the same

Tech B 2024-12-17 22:32

https://www.youtube.com/watch?v=U5SPZwHMCLM from 2.20

Tech A 2024-12-17 22:37

Makes total sense, I'm going to call Elena and explain her, thank you!

---
title: "Adjust Patient Height Settings for Proper CBCT Exposure"
category: imaging
tags: ["ct-scan", "calibration"]
source_thread_id: "spaces/AAAA05BdS6s/threads/NJZ6d-pjlCI"
source_space: "spaces/AAAA05BdS6s"
generated_at: "2026-04-22T14:08:19"
participants: ["Tech A", "Tech B"]
---

# Adjust Patient Height Settings for Proper CBCT Exposure

## Problem
A dental office experienced poor image quality on their first CBCT scan of an edentulous (no teeth) tall patient. The top portion of the image showed inadequate bone exposure despite increasing the exposure settings. The doctor deemed the image unsuitable for diagnostic purposes. Subsequent scans on other patients worked normally, suggesting the issue was specific to this patient's physical characteristics.

## Resolution
1. Access the CBCT acquisition screen before taking the scan
2. Locate the patient type/height settings (typically labeled as man, woman, child, or similar categories)
3. Select the appropriate setting based on the patient's height and build
4. Proceed with the scan using the adjusted parameters

The patient height settings automatically adjust exposure and positioning parameters to account for different body sizes and bone density variations. Taller patients require different calibration than average-sized patients to ensure proper image quality throughout the scan volume.

## References
- Source discussion: `spaces/AAAA05BdS6s/threads/NJZ6d-pjlCI`
- Attachments: ![image.png](../attachments/NJZ6d-pjlCI.NJZ6d-pjlCI/image.png) — The screen displays a **3D dental CBCT (cone beam CT) reconstruction** of what appears to be a maxillary or mandibular arch, rendered in a volumetric brown/tan color scheme against a black background. A **yellow crosshair/bounding box overlay** is visible, indicating an active region-of-interest (ROI) or slice-plane selection tool centered on the arch. The interface includes a **3D orientation head icon** in the upper-left corner and a **"Tools" panel tab** on the right edge; no error codes, numeric readouts, or warning messages are visible on screen.

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migrated Migrated 2026-04-22 14:27 · view on WikiJS.