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

IF 2.9 2区 医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE Dento maxillo facial radiology Pub Date : 2024-09-01 DOI:10.1093/dmfr/twae026
Juha Koivisto, Jan Wolff, Ruben Pauwels, Touko Kaasalainen, Anni Suomalainen, Patricia Stoor, Jani Horelli, Juho Suojanen
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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.

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评估用于可视化手术规划的最佳 STL 模型的锥束 CT 技术图像质量指标和辐射剂量。
研究目的本研究的目的是以 CT 为参考,确定能在正颌虚拟手术规划的有效剂量和三维模型之间实现最佳平衡的锥束计算机断层扫描(CBCT)方案,并评估是否可以根据技术图像质量指标来确定此类方案:根据有效剂量和技术图像质量测量结果,从 32 个候选方案中筛选出 11 个 CBCT(VISO G7,芬兰赫尔辛基 Planmeca Oy 公司)扫描方案。接下来,使用这 11 种 CBCT 扫描方案和 2 台 CT 扫描仪对拟人化的 RANDO SK150 模型进行扫描,以评估骨量。所生成的 DICOM 文件被转换成 STL 模型,用于测量预定义眼眶区域的骨量和面积,以评估每种 CBCT 方案对 VSP 的有效性:使用正常剂量方案(F2)和 ULD 方案(J13)获得的 CBCT 骨量和 STL 模型面积最大,分别为 CT 扫描仪测量的平均 STL 骨量的 48% 和 96%,以及骨面积的 48% 和 95%:最佳正常剂量 CBCT 方案 "F2 "为 STL 提供了最佳的骨面积和骨量平衡。最佳 CBCT 方案的 CNR 和 MTF 值与参考 CT 扫描仪的 CNR 和 MTF 值相似。采用选定方案的 CBCT 扫描仪可替代 CT 扫描仪,以较低的有效剂量获取用于 VSP 的 STL 模型。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
5.60
自引率
9.10%
发文量
65
审稿时长
4-8 weeks
期刊介绍: Dentomaxillofacial Radiology (DMFR) is the journal of the International Association of Dentomaxillofacial Radiology (IADMFR) and covers the closely related fields of oral radiology and head and neck imaging. Established in 1972, DMFR is a key resource keeping dentists, radiologists and clinicians and scientists with an interest in Head and Neck imaging abreast of important research and developments in oral and maxillofacial radiology. The DMFR editorial board features a panel of international experts including Editor-in-Chief Professor Ralf Schulze. Our editorial board provide their expertise and guidance in shaping the content and direction of the journal. Quick Facts: - 2015 Impact Factor - 1.919 - Receipt to first decision - average of 3 weeks - Acceptance to online publication - average of 3 weeks - Open access option - ISSN: 0250-832X - eISSN: 1476-542X
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