Oral Radiology最新文献

{"title":"Comment on \"Deep-learning approach for caries detection and segmentation on dental bitewing radiographs.\"","authors":"Ming Hong Jim Pun","doi":"10.1007/s11282-023-00672-z","DOIUrl":"10.1007/s11282-023-00672-z","url":null,"abstract":"","PeriodicalId":56103,"journal":{"name":"Oral Radiology","volume":" ","pages":"92"},"PeriodicalIF":2.2,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10747561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Five-year change of panoramic radiomorphometric indices and fractal dimension values in type 2 diabetes patients.","authors":"Numan Dedeoğlu, Gözde Eşer, Duygu Çelik Özen, Oğuzhan Altun","doi":"10.1007/s11282-023-00707-5","DOIUrl":"10.1007/s11282-023-00707-5","url":null,"abstract":"<p><strong>Objectives: </strong>Diabetes mellitus is a chronic disease characterized by dysregulation of glucose metabolism, with characteristic long-term complications accompanied by changes in bone quality. The purpose of this study is to compare the results with a control group by performing radiomorphometric analyses on panoramic radiographs obtained 5 years apart to examine changes in the mandibular bone cortex and microstructures of type 2 diabetes mellitus (T2DM) patients.</p><p><strong>Methods: </strong>Two panoramic radiographs that were taken 5 years (mean 5.26 ± 0.134) apart from 52 patients with T2DM (n:26) and a control group (n:26) were used. A total of 104 images were evaluated. Analyses were done from the condyle (FD1), angulus (FD2), distal second premolar apex (FD3), and anterior to the mental foramen (FD4) for fractal dimension (FD) in the mandible. Symphysis index (SI), anterior index (AI), molar index (MI), posterior index (PI), and panoramic mandibular index (PMI) measurements were taken for cortical analysis. Three-way ANOVA, three-way robust ANOVA, two-way ANOVA, and two-way robust ANOVA tests were used for statistical analysis (p < 0.05).</p><p><strong>Results: </strong>After a 5-year period, there was a significant decrease in all FD measures of the mandible in both T2DM and control groups (p < 0.05). This resulted in a statistical difference in the main effect of time. After a 5-year period, no significant difference in mandibular cortical measures was identified between the T2DM and control groups (p > 0.05).</p><p><strong>Conclusion: </strong>According to panoramic radiography, the mandibular trabecular structure deteriorated after 5 years, whereas cortical values remained the same. It concluded that T2DM had no effect on these results.</p>","PeriodicalId":56103,"journal":{"name":"Oral Radiology","volume":" ","pages":"49-57"},"PeriodicalIF":2.2,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10052785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of CBCT-derived panoramic curve variability in the measurements for dental implant planning.","authors":"Cyntia Adames, Hugo Gaêta-Araujo, Ademir Franco, Mariana Quirino Silveira Soares, José Luiz Cintra Junqueira, Anne Caroline Oenning","doi":"10.1007/s11282-023-00703-9","DOIUrl":"10.1007/s11282-023-00703-9","url":null,"abstract":"<p><strong>Objective: </strong>To investigate whether the curve markings performed prior to panoramic and cross-sectional reconstructions can influence the planning of oral implants.</p><p><strong>Methods: </strong>Twenty oral radiologists landmarked the reference panoramic curves in 25 CBCT scans of the mandible. Bone height was measured on the resulting cross-sectional slices in the edentulous region of the lower first molar. The following data were recorded: (1) number of landmarks used to build each reference curve; (2) shape of the reference curve (inverted \"U\", inverted \"V\" or \"horseshoe\"); and (3) measurement in the first molar region. The data were assessed for variability based on the number of landmarks, the shape of the reference curve, and the measurements obtained.</p><p><strong>Results: </strong>The number of landmarks used to guide the panoramic reconstruction varied among radiologists (p < 0.05), but most of them draw curves in inverted \"U\" shape (68-100%). The reproducibility of the measurements taken in the edentulous mandibular first molar region was excellent (84.7%). The number of landmarks and the shape of the curve did not have a significant influence on the reproducibility of the measurements (p > 0.05).</p><p><strong>Conclusion: </strong>Variations of the operator-dependent steps during the panoramic reconstructions occur but do not play a significant part changing the measurements taken for oral implant planning.</p>","PeriodicalId":56103,"journal":{"name":"Oral Radiology","volume":" ","pages":"30-36"},"PeriodicalIF":2.2,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9931977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of mandibular buccal shelf morphology between adolescents and adults with different vertical patterns using CBCT.","authors":"Xiaoxu Fang, Hong Ding, Cunhui Fan, Lei Pang, Tao Xu, Jialin Liu, Chunmiao Jiang","doi":"10.1007/s11282-023-00710-w","DOIUrl":"10.1007/s11282-023-00710-w","url":null,"abstract":"<p><strong>Objective: </strong>This retrospective study aimed to analyze the anatomical structure of the mandibular buccal shelf (MBS) in adolescents and adults with different vertical patterns to determine the optimal location for miniscrew insertion in orthodontic treatment.</p><p><strong>Methods: </strong>Cone-beam computed tomography (CBCT) scans of 230 patients were utilized for measurements. The morphology and thickness of alveolar bone at the MBS were measured. Two-way ANOVA and regression analysis were conducted to analyze the influencing factors on alveolar bone and cortical bone thickness.</p><p><strong>Results: </strong>Age had a significant effect on alveolar bone thickness (level I: F = 62.449, level II: F = 18.86, p < 0.001), cortical bone thickness (level II: F = 18.86, p < 0.001), alveolar bone tilt (F = 6.267, p = 0.013), and second molar tilt (F = 6.693, p = 0.01). Different vertical patterns also influenced alveolar bone thickness (level I: F = 20.950, level II: F = 28.470, p < 0.001), cortical bone thickness (level I: F = 23.911, level II: F = 23.370, p < 0.001), and alveolar bone tilt (F = 27.046, p < 0.001). As age increased, the alveolar bone thickness at level I decreased by 0.096 mm and at level II decreased by 0.073 mm. Conversely, the thickness of alveolar bone at level I and level II increased by 0.06 mm and 0.075 mm, respectively. The cortical bone thickness at level I and level II increased by 0.024 mm and 0.29 mm, respectively. However, the alveolar bone thickness decreased by 0.931 mm and 1.545 mm at level I and level II, and the cortical bone thickness decreased by 0.542 mm and 0.640 mm at level I and level II, respectively.</p><p><strong>Conclusion: </strong>Age, different vertical patterns, alveolar bone inclination, and different shapes of MBS significantly affected the thickness of alveolar bone and cortical bone in the MBS area. Notably, only alveolar bone thickness and cortical bone thickness at level II were affected by age and different vertical patterns simultaneously. These findings can provide valuable insights for orthodontic practitioners in selecting the most suitable location for miniscrew insertion during treatment planning.</p>","PeriodicalId":56103,"journal":{"name":"Oral Radiology","volume":" ","pages":"58-68"},"PeriodicalIF":2.2,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41124013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Deep learning for diagnosis of head and neck cancers through radiographic data: a systematic review and meta-analysis.","authors":"Rata Rokhshad, Seyyede Niloufar Salehi, Amirmohammad Yavari, Parnian Shobeiri, Mahdieh Esmaeili, Nisha Manila, Saeed Reza Motamedian, Hossein Mohammad-Rahimi","doi":"10.1007/s11282-023-00715-5","DOIUrl":"10.1007/s11282-023-00715-5","url":null,"abstract":"<p><strong>Purpose: </strong>This study aims to review deep learning applications for detecting head and neck cancer (HNC) using magnetic resonance imaging (MRI) and radiographic data.</p><p><strong>Methods: </strong>Through January 2023, a PubMed, Scopus, Embase, Google Scholar, IEEE, and arXiv search were carried out. The inclusion criteria were implementing head and neck medical images (computed tomography (CT), positron emission tomography (PET), MRI, Planar scans, and panoramic X-ray) of human subjects with segmentation, object detection, and classification deep learning models for head and neck cancers. The risk of bias was rated with the quality assessment of diagnostic accuracy studies (QUADAS-2) tool. For the meta-analysis diagnostic odds ratio (DOR) was calculated. Deeks' funnel plot was used to assess publication bias. MIDAS and Metandi packages were used to analyze diagnostic test accuracy in STATA.</p><p><strong>Results: </strong>From 1967 studies, 32 were found eligible after the search and screening procedures. According to the QUADAS-2 tool, 7 included studies had a low risk of bias for all domains. According to the results of all included studies, the accuracy varied from 82.6 to 100%. Additionally, specificity ranged from 66.6 to 90.1%, sensitivity from 74 to 99.68%. Fourteen studies that provided sufficient data were included for meta-analysis. The pooled sensitivity was 90% (95% CI 0.820.94), and the pooled specificity was 92% (CI 95% 0.87-0.96). The DORs were 103 (27-251). Publication bias was not detected based on the p-value of 0.75 in the meta-analysis.</p><p><strong>Conclusion: </strong>With a head and neck screening deep learning model, detectable screening processes can be enhanced with high specificity and sensitivity.</p>","PeriodicalId":56103,"journal":{"name":"Oral Radiology","volume":" ","pages":"1-20"},"PeriodicalIF":2.2,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49685479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Monte Carlo simulations of organ and effective doses and dose-length product for dental cone-beam CT.","authors":"Shingo Terashima, Junta Sano, Minoru Osanai, Keisuke Toshima, Kentaro Ohuchi, Yoichiro Hosokawa","doi":"10.1007/s11282-023-00705-7","DOIUrl":"10.1007/s11282-023-00705-7","url":null,"abstract":"<p><strong>Objectives: </strong>The use of dental cone-beam CT (CBCT) has increased in recent years. We aimed to calculate the organ and effective doses in dental CBCT using Monte Carlo simulation (MCS) and to correlate the effective dose with the dose-length product (DLP), which is a radiation dose index.</p><p><strong>Methods: </strong>Organ and effective doses were calculated by MCS using the adult male and female reference phantoms of the International Commission on Radiological Protection publication 110 in a half-rotation scan of the CBCT scanner Veraviewepocs 3Df. The simulations were performed by setting nine protocols in combination with the field-of-view (FOV) and imaging region. In addition, DLPs were calculated by MCS using the virtual CT Dose Index (CTDI) and CBCT phantoms, with the same protocol.</p><p><strong>Results: </strong>The effective doses were 55 and 195 μSv at the minimum FOV of Φ40 × H40 mm and maximum FOV of Φ 80 × H80 mm, respectively. The organs with the major contribution to the effective dose were the red bone marrow (11.0‒12.8%), thyroid gland (4.0‒12.7%), salivary gland (21.8‒33.2%), and remaining tissues (35.1‒45.7%). Positive correlations were obtained between the effective dose and calculated DLP using the CTDI and CBCT phantoms.</p><p><strong>Conclusions: </strong>Organ and effective doses for each protocol of dental CBCT could be estimated using MCS. There was a positive correlation between the effective dose and DLP, suggesting that DLP can be used to estimate the effective dose of CBCT.</p>","PeriodicalId":56103,"journal":{"name":"Oral Radiology","volume":" ","pages":"37-48"},"PeriodicalIF":2.2,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10018103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Maxillary sinuses, multiple aspects to consider prior to bone grafting procedure: a retrospective study in a sample of a Palestinian population.","authors":"Mahmoud F Abu-Ta'a","doi":"10.1007/s11282-023-00702-w","DOIUrl":"10.1007/s11282-023-00702-w","url":null,"abstract":"<p><strong>Objectives: </strong>To analyze various anatomical aspects of the maxillary sinuses on CBCT volumes, mainly, the posterior superior alveolar artery (PSAA), and to compare its visibility on CBCT vs. panoramic radiographs.</p><p><strong>Material and methods: </strong>A retrospective radiographic analysis was conducted on 120 patients (240 maxillary sinuses) using their CBCT coronal views (CCV) and panoramic radiographs (CP). On CCV, the PSAA's maximum dimension (MD), vertical distance (PVD) to the alveolar crest, and bone plate thickness (T1 and T2) buccally and inferiorly to the PSAA, respectively, were analyzed. Additionally, on CCV, the ostium vertical distance (OVD) and location were recorded, and the height of the remaining bone height inferior to the maxillary sinuses (MVD) was also measured. The PSAA's visibility was evaluated and compared between CCV and CP. All these variables were studied at the apical region of the second maxillary premolar (P2), first molar (M1), and second molar (M2). Age, gender, and face side (right vs. left) factors affecting the sinus dimensions and visibility were investigated. Several statistical tests were used to analyze these variables.</p><p><strong>Results: </strong>PSAA was detected in 96.53% of the records on CCV, where it was significantly superior to CP in the detection of the PSAA structure (p value 0.000) at all sites analyzed. The PSAA's MD, PVD, T1 and T2 thicknesses, and MVD were on average 1.19 mm, 19.54 mm, 0.69 mm, 1.36 mm, and 10.25, respectively. OVD average was 31.04 mm where 42.9% of the ostia were within the mesiodistal extent of the second upper molar. No significant relation was found between different age groups, gender, and the visibility level of PSAA.</p><p><strong>Conclusion: </strong>Age, gender, and the side of the face investigated showed no discernible effects on the maxillary sinus's bone thickness, vertical dimensions, or PSAA diameter among the studied Palestinian sample. As CCV was superior to CP in the identification of PSSA, preoperative evaluation of PSSA using CBCT volumes is thus recommended.</p>","PeriodicalId":56103,"journal":{"name":"Oral Radiology","volume":" ","pages":"21-29"},"PeriodicalIF":2.2,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9907801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Accuracy of formula-based volume and image segmentation-based volume in calculation of preoperative cystic jaw lesions’ volume","authors":"Yasmein Maher El-beblawy, Ahmed Mohamed Bakry, Maha Eshaq Amer Mohamed","doi":"10.1007/s11282-023-00731-5","DOIUrl":"https://doi.org/10.1007/s11282-023-00731-5","url":null,"abstract":"&lt;h3 data-test=\"abstract-sub-heading\"&gt;Objective&lt;/h3&gt;&lt;p&gt;The aim of this study was to assess the accuracy of formula-based volume measurements and the 3D volume analysis with different software packages in the calculation of preoperative cystic jaw lesions’ volume. The secondary aim was to assess the reliability and the accuracy of 3 imaging software programs for measuring the cystic jaw lesions' volume in CBCT images.&lt;/p&gt;&lt;h3 data-test=\"abstract-sub-heading\"&gt;Materials and methods&lt;/h3&gt;&lt;p&gt;This study consisted of two parts: an in vitro part using 2 dry human mandibles that were used to create simulated osteolytic lesions to assess the accuracy of the volumetric analysis and formula-based volume. As a gold standard, the volume of each bone defect was determined by taking an impression using rapid soft silicone (Vinylight) and then quantifying the volume of the replica. Afterward, each tooth socket was scanned using a high-resolution CBCT. A retrospective part using archived CBCT radiographs that were taken from the database of the outpatient clinic of the oral and maxillofacial radiology department, Faculty of Dentistry, Minia University to assess the reliability of the 3 software packages. The volumetric data set was exported for volume quantification using the 3 software packages (MIMICS-OnDemand and InVesalius software). Also, the three greatest orthogonal diameters of the lesions were calculated, and the volume was assessed using the ellipsoid formula. Dunn’s test was used for pair-wise comparisons when Friedman’s test was significant. The inter-examiner agreement was assessed using Cronbach’s alpha reliability coefficient and intra-class correlation coefficient.&lt;/p&gt;&lt;h3 data-test=\"abstract-sub-heading\"&gt;Results&lt;/h3&gt;&lt;p&gt;Regarding the results of the retrospective part, there was a statistically significant difference between volumetric measurements by equation and different software (&lt;i&gt;P&lt;/i&gt; value &lt; 0.001, Effect size = 0.513). The inter-observer reliability of the measurements of the cystic lesions using the different software packages was very good. The highest inter-examiner agreement for volume measurement was found with InVesalius (Cronbach’s alpha = 0.992). On the other hand, there was a statistically significant difference between dry mandible volumetric measurements and Gold Standard. All software showed statistically significantly lower dry mandible volumetric measurements than the gold standard.&lt;/p&gt;&lt;h3 data-test=\"abstract-sub-heading\"&gt;Conclusion&lt;/h3&gt;&lt;p&gt;Computer-aided assessment of cystic lesion volume using InVesalius, OnDemand, and MIMICS is a readily available, easy to use, non-invasive option. It confers an advantage over formula-based volume as it gives the exact morphology of the lesion so that potential problems can be detected before surgery. Volume analysis with InVesalius software was accurate in determining the volume of simulated periapical defects in a human cadaver mandible as compared to true volume. InVesalius software prove","PeriodicalId":56103,"journal":{"name":"Oral Radiology","volume":"4 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138743447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CT and MR imaging findings of head and neck chondrosarcoma","authors":"Yoon Joo Choi, Sang-Sun Han, Chena Lee, Kug Jin Jeon","doi":"10.1007/s11282-023-00729-z","DOIUrl":"https://doi.org/10.1007/s11282-023-00729-z","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Objectives</h3><p>This study investigated the imaging features of head and neck chondrosarcoma (HNCS) according to its origin and pathologic subtype.</p><h3 data-test=\"abstract-sub-heading\">Methods</h3><p>Patients who were pathologically diagnosed with HNCS between January 2000 and April 2022 were retrospectively reviewed. Lesions were classified based on their origin and pathologic subtype. The size and margin were evaluated on the image. Internal calcification and the effects on adjacent bone were assessed using computed tomography (CT) images, while signal intensity and contrast enhancement patterns were analyzed using magnetic resonance (MR) imaging.</p><h3 data-test=\"abstract-sub-heading\">Results</h3><p>Thirteen HNCSs were included in this study: 8 bone tumors (61.5%) and 5 soft tissue tumors (38.5%). The bone tumors were pathologically diagnosed as conventional (n = 5) and mesenchymal type (n = 3). Soft tissue tumors were defined as myxoid type. The main symptoms were swelling (90.9%) and pain (72.7%). The lesions measured 4.5 cm on average. The margins showed benign and well-defined except for the mesenchymal type. On CT, most bone tumors (75%) showed internal calcification with remodeling or destruction of the adjacent bone. No soft tissue tumors, except one case, showed internal calcification or destruction of the adjacent bone. MR imaging features were non-specific (T2 high signal intensity and contrast enhancement).</p><h3 data-test=\"abstract-sub-heading\">Conclusions</h3><p>HCNS showed various imaging findings according to their origin and pathologic subtype. HNCS should be differentiated if a bone tumor shows internal calcification and affects the adjacent bone. When diagnosing slow-growing soft tissue tumors, even if low possibility, HNCS should be considered.</p>","PeriodicalId":56103,"journal":{"name":"Oral Radiology","volume":"98 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138716699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Radiation doses of medical radiation workers performing low-dose-rate brachytherapy with 198Au grains and 192Ir pins for patients with oral cancers","authors":"","doi":"10.1007/s11282-023-00728-0","DOIUrl":"https://doi.org/10.1007/s11282-023-00728-0","url":null,"abstract":"<h3>Abstract</h3> <span> <h3>Objectives</h3> <p>Low-dose-rate brachytherapy (LDR-BT) with ¹⁹⁸Au grains and ¹⁹²Ir pins is an essential treatment option for oral cancer due to its high rate of local control and low invasiveness. However, the radiation exposure of medical radiation workers is concerning. Thus, we aimed to determine the radiation dose delivered to medical radiation workers during LDR-BT using ¹⁹⁸Au grains and ¹⁹²Ir pins for oral cancer.</p> </span> <span> <h3>Methods</h3> <p>Thirty-two patients with oral cancer underwent ¹⁹⁸Au grain interstitial LDR-BT between June 2016 and May 2023, and 23 patients with tongue cancer underwent ¹⁹²Ir pin interstitial LDR-BT between March 2015 and November 2017 at our hospital. Dosimetry was performed by attaching a dosimeter to the chest pocket of the operator and assistant during ¹⁹⁸Au grain or ¹⁹²Ir pin LDR-BT. Since the operator also loads ¹⁹⁸Au grains into the implantation device, the operator’s radiation dose includes the dose received during this preparation.</p> </span> <span> <h3>Results</h3> <p>Mean radiation doses of the operators with ¹⁹⁸Au grain and ¹⁹²Ir pin LDR-BT were 165.8 and 211.2 μSv, respectively. Statistically significant differences between the radioactive sources of ¹⁹⁸Au grain and ¹⁹²Ir pin LDR-BT were observed (<em>p</em> = 0.0459). The mean radiation doses of the assistants with ¹⁹⁸Au grain and ¹⁹²Ir pin LDR-BT were 92.0 and 162.0 μSv, respectively. Statistically significant differences were observed between the radioactive sources of ¹⁹⁸Au grains and ¹⁹²Ir pin LDR-BT (<em>p</em> = 0.0003).</p> </span> <span> <h3>Conclusions</h3> <p>Regarding radioactive source differences, ¹⁹²Ir pin LDR-BT resulted in higher doses delivered to medical radiation workers than ¹⁹⁸Au grain LDR-BT.</p> </span>","PeriodicalId":56103,"journal":{"name":"Oral Radiology","volume":"9 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138716967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}