Assessment of cone-beam CT technical image quality indicators and radiation dose for optimal STL model used in visual surgical planning

Juha Koivisto; Jan Wolff; Ruben Pauwels; Touko Kaasalainen; Anni Suomalainen; Patricia Stoor; Jani Horelli; Juho Suojanen

doi:10.1093/dmfr/twae026

Assessment of cone-beam CT technical image quality indicators and radiation dose for optimal STL model used in visual surgical planning

Juha Koivisto^*, Jan Wolff, Ruben Pauwels, Touko Kaasalainen, Anni Suomalainen, Patricia Stoor, Jani Horelli, Juho Suojanen

^*Corresponding author for this work

Department of Dentistry and Oral Health

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

Abstract

Objectives: The aim of this study was to identify cone-beam computed tomography (CBCT) protocols that offer an optimal balance between effective dose (ED) and 3D model for orthognathic virtual surgery planning, using CT as a reference, and to assess whether such protocols can be defined based on technical image quality metrics. Methods: Eleven CBCT (VISO G7, Planmeca Oy, Helsinki, Finland) scan protocols were selected out of 32 candidate protocols, based on ED and technical image quality measurements. Next, an anthropomorphic RANDO SK150 phantom was scanned using these 11 CBCT protocols and 2 CT scanners for bone quantity assessments. The resulting DICOM (Digital Imaging and Communications in Medicine) files were converted into Standard Tessellation Language (STL) models that were used for bone volume and area measurements in the predefined orbital region to assess the validity of each CBCT protocol for virtual surgical planning. Results: The highest CBCT bone volume and area of the STL models were obtained using normal dose protocol (F2) and ultra-low dose protocol (J13), which resulted in 48% and 96% of the mean STL bone volume and 48% and 95% of the bone area measured on CT scanners, respectively. Conclusions: The normal dose CBCT protocol “F2” offered optimal bone area and volume balance for STL. The optimal CBCT protocol can be defined using contrast-to-noise ratio and modulation transfer function values that were similar to those of the reference CT scanners’. CBCT scanners with selected protocols can offer a viable alternative to CT scanners for acquiring STL models for virtual surgical planning at a lower effective dose.

Original language	English
Journal	Dentomaxillofacial Radiology
Volume	53
Issue	6
Pages (from-to)	423-433
Number of pages	11
ISSN	0250-832X
DOIs	https://doi.org/10.1093/dmfr/twae026
Publication status	Published - Sept 2024

Keywords

3-dimensional
cone-beam computed tomography
orbit
Standard Tessellation Language

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10.1093/dmfr/twae026Licence: CC BY

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@article{916e060bde3d4e1d859c9eac10d796d9,

title = "Assessment of cone-beam CT technical image quality indicators and radiation dose for optimal STL model used in visual surgical planning",

abstract = "Objectives: The aim of this study was to identify cone-beam computed tomography (CBCT) protocols that offer an optimal balance between effective dose (ED) and 3D model for orthognathic virtual surgery planning, using CT as a reference, and to assess whether such protocols can be defined based on technical image quality metrics. Methods: Eleven CBCT (VISO G7, Planmeca Oy, Helsinki, Finland) scan protocols were selected out of 32 candidate protocols, based on ED and technical image quality measurements. Next, an anthropomorphic RANDO SK150 phantom was scanned using these 11 CBCT protocols and 2 CT scanners for bone quantity assessments. The resulting DICOM (Digital Imaging and Communications in Medicine) files were converted into Standard Tessellation Language (STL) models that were used for bone volume and area measurements in the predefined orbital region to assess the validity of each CBCT protocol for virtual surgical planning. Results: The highest CBCT bone volume and area of the STL models were obtained using normal dose protocol (F2) and ultra-low dose protocol (J13), which resulted in 48% and 96% of the mean STL bone volume and 48% and 95% of the bone area measured on CT scanners, respectively. Conclusions: The normal dose CBCT protocol “F2” offered optimal bone area and volume balance for STL. The optimal CBCT protocol can be defined using contrast-to-noise ratio and modulation transfer function values that were similar to those of the reference CT scanners{\textquoteright}. CBCT scanners with selected protocols can offer a viable alternative to CT scanners for acquiring STL models for virtual surgical planning at a lower effective dose.",

keywords = "3-dimensional, cone-beam computed tomography, orbit, Standard Tessellation Language",

author = "Juha Koivisto and Jan Wolff and Ruben Pauwels and Touko Kaasalainen and Anni Suomalainen and Patricia Stoor and Jani Horelli and Juho Suojanen",

note = "Publisher Copyright: {\textcopyright} The Author(s) 2024.",

year = "2024",

month = sep,

doi = "10.1093/dmfr/twae026",

language = "English",

volume = "53",

pages = "423--433",

journal = "Dentomaxillofacial Radiology",

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Assessment of cone-beam CT technical image quality indicators and radiation dose for optimal STL model used in visual surgical planning. / Koivisto, Juha; Wolff, Jan; Pauwels, Ruben et al.
In: Dentomaxillofacial Radiology, Vol. 53, No. 6, 09.2024, p. 423-433.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

TY - JOUR

T1 - Assessment of cone-beam CT technical image quality indicators and radiation dose for optimal STL model used in visual surgical planning

AU - Koivisto, Juha

AU - Wolff, Jan

AU - Pauwels, Ruben

AU - Kaasalainen, Touko

AU - Suomalainen, Anni

AU - Stoor, Patricia

AU - Horelli, Jani

AU - Suojanen, Juho

N1 - Publisher Copyright: © The Author(s) 2024.

PY - 2024/9

Y1 - 2024/9

N2 - Objectives: The aim of this study was to identify cone-beam computed tomography (CBCT) protocols that offer an optimal balance between effective dose (ED) and 3D model for orthognathic virtual surgery planning, using CT as a reference, and to assess whether such protocols can be defined based on technical image quality metrics. Methods: Eleven CBCT (VISO G7, Planmeca Oy, Helsinki, Finland) scan protocols were selected out of 32 candidate protocols, based on ED and technical image quality measurements. Next, an anthropomorphic RANDO SK150 phantom was scanned using these 11 CBCT protocols and 2 CT scanners for bone quantity assessments. The resulting DICOM (Digital Imaging and Communications in Medicine) files were converted into Standard Tessellation Language (STL) models that were used for bone volume and area measurements in the predefined orbital region to assess the validity of each CBCT protocol for virtual surgical planning. Results: The highest CBCT bone volume and area of the STL models were obtained using normal dose protocol (F2) and ultra-low dose protocol (J13), which resulted in 48% and 96% of the mean STL bone volume and 48% and 95% of the bone area measured on CT scanners, respectively. Conclusions: The normal dose CBCT protocol “F2” offered optimal bone area and volume balance for STL. The optimal CBCT protocol can be defined using contrast-to-noise ratio and modulation transfer function values that were similar to those of the reference CT scanners’. CBCT scanners with selected protocols can offer a viable alternative to CT scanners for acquiring STL models for virtual surgical planning at a lower effective dose.

AB - Objectives: The aim of this study was to identify cone-beam computed tomography (CBCT) protocols that offer an optimal balance between effective dose (ED) and 3D model for orthognathic virtual surgery planning, using CT as a reference, and to assess whether such protocols can be defined based on technical image quality metrics. Methods: Eleven CBCT (VISO G7, Planmeca Oy, Helsinki, Finland) scan protocols were selected out of 32 candidate protocols, based on ED and technical image quality measurements. Next, an anthropomorphic RANDO SK150 phantom was scanned using these 11 CBCT protocols and 2 CT scanners for bone quantity assessments. The resulting DICOM (Digital Imaging and Communications in Medicine) files were converted into Standard Tessellation Language (STL) models that were used for bone volume and area measurements in the predefined orbital region to assess the validity of each CBCT protocol for virtual surgical planning. Results: The highest CBCT bone volume and area of the STL models were obtained using normal dose protocol (F2) and ultra-low dose protocol (J13), which resulted in 48% and 96% of the mean STL bone volume and 48% and 95% of the bone area measured on CT scanners, respectively. Conclusions: The normal dose CBCT protocol “F2” offered optimal bone area and volume balance for STL. The optimal CBCT protocol can be defined using contrast-to-noise ratio and modulation transfer function values that were similar to those of the reference CT scanners’. CBCT scanners with selected protocols can offer a viable alternative to CT scanners for acquiring STL models for virtual surgical planning at a lower effective dose.

KW - 3-dimensional

KW - cone-beam computed tomography

KW - orbit

KW - Standard Tessellation Language

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U2 - 10.1093/dmfr/twae026

DO - 10.1093/dmfr/twae026

M3 - Journal article

C2 - 38913866

AN - SCOPUS:85202812891

SN - 0250-832X

VL - 53

SP - 423

EP - 433

JO - Dentomaxillofacial Radiology

JF - Dentomaxillofacial Radiology

IS - 6

ER -

Assessment of cone-beam CT technical image quality indicators and radiation dose for optimal STL model used in visual surgical planning

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