Tomography最新文献_第8页

Primary Sclerosing Cholangitis: Diagnostic Criteria. 原发性硬化性胆管炎：诊断标准。

IF 2.2 4区医学

Tomography Pub Date : 2024-01-07 DOI: 10.3390/tomography10010005

Nora Cazzagon, Samantha Sarcognato, Elisa Catanzaro, Emanuela Bonaiuto, Matteo Peviani, Francesco Pezzato, Raffaella Motta

引用次数: 0

Cone-Beam Computerized Tomography Evaluation of the Relationship between Orthodontic Vertical Direction Parameters and the Distance from the Apex of the Upper Central Tooth to the Nasal Floor and Anterior Nasal Spine 锥形束计算机断层扫描评估正畸垂直方向参数与上中牙尖到鼻底和前鼻骨棘的距离之间的关系

IF 1.9 4区医学

Tomography Pub Date : 2024-01-05 DOI: 10.3390/tomography10010004

Saadet Çınarsoy Ciğerim, Türkan Sezen Erhamza

{"title":"Cone-Beam Computerized Tomography Evaluation of the Relationship between Orthodontic Vertical Direction Parameters and the Distance from the Apex of the Upper Central Tooth to the Nasal Floor and Anterior Nasal Spine","authors":"Saadet Çınarsoy Ciğerim, Türkan Sezen Erhamza","doi":"10.3390/tomography10010004","DOIUrl":"https://doi.org/10.3390/tomography10010004","url":null,"abstract":"The aim of this study was to examine the relationship between the vertical cephalometric values and the distance from the apex tip of the upper central tooth (U1A) to the anterior nasal spine (ANS) and nasal floor (NF) using cone-beam computerized tomography (CBCT). One hundred and twenty-two patients who applied to the Department of Orthodontics between January 2011 and June 2019 were included. The distances between the U1A and the NF and ANS were measured using CBCT. Statistical significance was considered as p < 0.05. Of the 122 individuals, 73.8% (n = 90) were female and 26.2% (n = 32) were male, with a mean age of 22.8 ± 3.3 years. A statistically significant moderate positive correlation was found between the mean NF-U1A values and the N-Me, ANS-Me, ANS-Gn, S-Go, and N-ANS measurements (p < 0.01). A statistically significant positive correlation was found between the mean ANS-U1A values and the Ar-Go-Me, total posterior angles, N-Me, SN/GoGn and Y-axis angle, ANS-Me, and ANS-Gn measurements (p < 0.01). The distance from the U1A to the ANS and NF was related to the orthodontic vertical direction parameters. The ANS-U1A and NF-U1A distances can serve as reference points for identifying the orthodontic vertical growth pattern from CBCT scans.","PeriodicalId":51330,"journal":{"name":"Tomography","volume":"76 7","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139450384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Residual Lung Abnormalities in Survivors of Severe or Critical COVID-19 at One-Year Follow-Up Computed Tomography: A Narrative Review Comparing the European and East Asian Experiences 严重或危重 COVID-19 存活者一年随访计算机断层扫描中残留的肺部异常：欧洲与东亚经验比较的叙述性综述

IF 1.9 4区医学

Tomography Pub Date : 2023-12-30 DOI: 10.3390/tomography10010003

A. Borghesi, Pietro Ciolli, Elisabetta Antonelli, Alessandro Monti, A. Scrimieri, M. Ravanelli, Roberto Maroldi, Davide Farina

{"title":"Residual Lung Abnormalities in Survivors of Severe or Critical COVID-19 at One-Year Follow-Up Computed Tomography: A Narrative Review Comparing the European and East Asian Experiences","authors":"A. Borghesi, Pietro Ciolli, Elisabetta Antonelli, Alessandro Monti, A. Scrimieri, M. Ravanelli, Roberto Maroldi, Davide Farina","doi":"10.3390/tomography10010003","DOIUrl":"https://doi.org/10.3390/tomography10010003","url":null,"abstract":"The literature reports that there was a significant difference in the medical impact of the COVID-19 pandemic between European and East Asian countries; specifically, the mortality rate of COVID-19 in Europe was significantly higher than that in East Asia. Considering such a difference, our narrative review aimed to compare the prevalence and characteristics of residual lung abnormalities at one-year follow-up CT after severe or critical COVID-19 in survivors of European and East Asian countries. A literature search was performed to identify articles focusing on the prevalence and characteristics of CT lung abnormalities in survivors of severe or critical COVID-19. Database analysis identified 16 research articles, 9 from Europe and 7 from East Asia (all from China). Our analysis found a higher prevalence of CT lung abnormalities in European than in Chinese studies (82% vs. 52%). While the most prevalent lung abnormalities in Chinese studies were ground-glass opacities (35%), the most prevalent lung abnormalities in European studies were linear (59%) and reticular opacities (55%), followed by bronchiectasis (46%). Although our findings required confirmation, the higher prevalence and severity of lung abnormalities in European than in Chinese survivors of COVID-19 may reflect a greater architectural distortion due to a more severe lung damage.","PeriodicalId":51330,"journal":{"name":"Tomography","volume":" 33","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139141643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Age-Dependent Changes in Effective Dose in Pediatric Brain CT: Comparisons of Estimation Methods 小儿脑 CT 有效剂量随年龄的变化：估算方法比较

IF 1.9 4区医学

Tomography Pub Date : 2023-12-24 DOI: 10.3390/tomography10010002

Yusuke Inoue, Masahiro Mori, Hiroyasu Itoh, K. Mitsui, Hiroki Miyatake, Takuro Yamane, H. Hata

{"title":"Age-Dependent Changes in Effective Dose in Pediatric Brain CT: Comparisons of Estimation Methods","authors":"Yusuke Inoue, Masahiro Mori, Hiroyasu Itoh, K. Mitsui, Hiroki Miyatake, Takuro Yamane, H. Hata","doi":"10.3390/tomography10010002","DOIUrl":"https://doi.org/10.3390/tomography10010002","url":null,"abstract":"The effective dose (ED) in computed tomography (CT) may be calculated by multiplying the dose–length product (DLP) by a conversion factor. As children grow, automatic exposure control increases the DLP, while the conversion factor decreases; these two changes affect the ED in opposite ways. The aim of this study was to investigate the methods of ED estimation according to age in pediatric brain CT. We retrospectively analyzed 980 brain CT scans performed for various clinical indications in children. The conversion factor at each age, in integer years, was determined based on the values at 0, 1, 5, and 10 years provided by the International Commission on Radiological Protection (ICRP), using a curve (curve method) or lines (linear method). In the simple method, the ED was estimated using the ICRP conversion factor for the closest age. We also analyzed the ED estimated by a radiation dose management system. Although the median DLP at each age increased with age, the median ED estimated by the curve method was highest at 0 years, decreased with age, and then plateaued at 9 years. The linear method yielded mildly different results, especially at 2 and 3 years. The ED estimated by the simple method or the radiation dose management system showed inconsistent, up-and-down changes with age. In conclusion, the ED in pediatric brain CT decreases with age despite increased DLP. Determination of the conversion factor at each age using a curve is expected to contribute to estimating the ED in pediatric CT according to age.","PeriodicalId":51330,"journal":{"name":"Tomography","volume":"560 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139160690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advantages of Photon-Counting Detector CT in Aortic Imaging 光子计数探测器 CT 在主动脉成像中的优势

IF 1.9 4区医学

Tomography Pub Date : 2023-12-19 DOI: 10.3390/tomography10010001

C. Zanon, Filippo Cademartiri, Alessandro Toniolo, Costanza Bini, Alberto Clemente, E. C. Colacchio, G. Cabrelle, Florinda Mastro, Michele Antonello, Emilio Quaia, Alessia Pepe

引用次数: 0

Exploring CNS Involvement in Pain Insensitivity in Hereditary Sensory and Autonomic Neuropathy Type 4: Insights from Tc-99m ECD SPECT Imaging. 探索中枢神经系统在遗传性感觉和自主神经病变 4 型疼痛不敏感中的参与：Tc-99m ECD SPECT 成像的启示。

IF 1.9 4区医学

Tomography Pub Date : 2023-12-18 DOI: 10.3390/tomography9060175

Cheng-Chun Chiang, Yu-Che Wu, Chiao-Hsin Lan, Kuan-Chieh Wang, Hsuan-Ching Tang, Shin-Tsu Chang

{"title":"Exploring CNS Involvement in Pain Insensitivity in Hereditary Sensory and Autonomic Neuropathy Type 4: Insights from Tc-99m ECD SPECT Imaging.","authors":"Cheng-Chun Chiang, Yu-Che Wu, Chiao-Hsin Lan, Kuan-Chieh Wang, Hsuan-Ching Tang, Shin-Tsu Chang","doi":"10.3390/tomography9060175","DOIUrl":"10.3390/tomography9060175","url":null,"abstract":"Hereditary sensory and autonomic neuropathy type 4 (HSAN4), also known as congenital insensitivity to pain with anhidrosis (CIPA), is a rare genetic disorder caused by NTRK1 gene mutations, affecting nerve growth factor signaling. This study investigates the central nervous system's (CNS) involvement and its relation to pain insensitivity in HSAN4. We present a 15-year-old girl with HSAN4, displaying clinical signs suggestive of CNS impact, including spasticity and a positive Babinski's sign. Using Technetium-99m ethyl cysteinate dimer single-photon emission computed tomography (Tc-99m ECD SPECT) imaging, we discovered perfusion deficits in key brain regions, notably the cerebellum, thalamus, and postcentral gyrus. These regions process pain signals, providing insights into HSAN4's pain insensitivity. This study represents the first visualization of CNS perfusion abnormality in an HSAN4 patient. It highlights the intricate relationship between the peripheral and central nervous systems in HSAN4. The complexity of HSAN4 diagnosis, involving potential unidentified genes, underscores the need for continued research to refine diagnostic approaches and develop comprehensive treatments.","PeriodicalId":51330,"journal":{"name":"Tomography","volume":"9 6","pages":"2261-2269"},"PeriodicalIF":1.9,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10747491/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138832895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-A Non-B Acute Aortic Dissection: Is There Some Confusion in the Radiologist's Mind? 非 A 非 B 急性主动脉夹层：放射科医生是否有些困惑？

IF 1.9 4区医学

Tomography Pub Date : 2023-12-15 DOI: 10.3390/tomography9060174

Tullio Valente, Giacomo Sica, Federica Romano, Gaetano Rea, Roberta Lieto, Marisa De Feo, Alessandro Della Corte, Salvatore Guarino, Candida Massimo, Mariano Scaglione, Emanuele Muto, Giorgio Bocchini

{"title":"Non-A Non-B Acute Aortic Dissection: Is There Some Confusion in the Radiologist's Mind?","authors":"Tullio Valente, Giacomo Sica, Federica Romano, Gaetano Rea, Roberta Lieto, Marisa De Feo, Alessandro Della Corte, Salvatore Guarino, Candida Massimo, Mariano Scaglione, Emanuele Muto, Giorgio Bocchini","doi":"10.3390/tomography9060174","DOIUrl":"10.3390/tomography9060174","url":null,"abstract":"Background: The aim of this study is to define and determine the rate of acute non-A-non-B aortic dissections, and to evaluate CT angiography findings and possible complications, as well as to discuss management strategies and currently available therapy. Non-A non-B type of aortic dissection is still a grey area in the radiologist's mind, such that it is not entirely clear what should be reported and completed in terms of this disease.Methods: A retrospective single-center study including 36 pre-treatment CT angiograms of consecutive patients (mean age: 61 years) between January 2012 and December 2022 with aortic dissection involving the aortic arch with/without the thoracic descending/abdominal aorta (type non-A non-B).Results: According to the dissection anatomy, we identified three modalities of spontaneous acute non-A-non-B anatomical configurations. Configuration 1 (n = 25) with descending-entry tear and retrograde arch extension (DTA entry). Configuration 2 (n = 4) with Arch entry tear and isolated arch involvement (Arch alone). Configuration 3 (n = 7) with Arch entry and anterograde descending (±abdominal) aorta involvement (Arch entry). CT angiogram findings, management, and treatment options are described.Conclusions: Acute non-A non-B dissection represents an infrequent occurrence of aortic arch dissection (with or without involvement of the descending aorta) that does not extend to the ascending aorta. The complete understanding of its natural progression, distinct CT angiography subtypes, optimal management, and treatment strategies remains incomplete. Within our series, patients frequently exhibit a complex clinical course, often necessitating a more assertive approach to treatment compared to type B dissections.","PeriodicalId":51330,"journal":{"name":"Tomography","volume":"9 6","pages":"2247-2260"},"PeriodicalIF":1.9,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10746994/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138832898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

MSTAC: A Multi-Stage Automated Classification of COVID-19 Chest X-ray Images Using Stacked CNN Models. MSTAC：使用堆叠 CNN 模型对 COVID-19 胸部 X 光图像进行多阶段自动分类。

IF 1.9 4区医学

Tomography Pub Date : 2023-12-13 DOI: 10.3390/tomography9060173

Thanakorn Phumkuea, Thakerng Wongsirichot, Kasikrit Damkliang, Asma Navasakulpong, Jarutas Andritsch

{"title":"MSTAC: A Multi-Stage Automated Classification of COVID-19 Chest X-ray Images Using Stacked CNN Models.","authors":"Thanakorn Phumkuea, Thakerng Wongsirichot, Kasikrit Damkliang, Asma Navasakulpong, Jarutas Andritsch","doi":"10.3390/tomography9060173","DOIUrl":"10.3390/tomography9060173","url":null,"abstract":"This study introduces a Multi-Stage Automated Classification (MSTAC) system for COVID-19 chest X-ray (CXR) images, utilizing stacked Convolutional Neural Network (CNN) models. Suspected COVID-19 patients often undergo CXR imaging, making it valuable for disease classification. The study collected CXR images from public datasets and aimed to differentiate between COVID-19, non-COVID-19, and healthy cases. MSTAC employs two classification stages: the first distinguishes healthy from unhealthy cases, and the second further classifies COVID-19 and non-COVID-19 cases. Compared to a single CNN-Multiclass model, MSTAC demonstrated superior classification performance, achieving 97.30% accuracy and sensitivity. In contrast, the CNN-Multiclass model showed 94.76% accuracy and sensitivity. MSTAC's effectiveness is highlighted in its promising results over the CNN-Multiclass model, suggesting its potential to assist healthcare professionals in efficiently diagnosing COVID-19 cases. The system outperformed similar techniques, emphasizing its accuracy and efficiency in COVID-19 diagnosis. This research underscores MSTAC as a valuable tool in medical image analysis for enhanced disease classification.","PeriodicalId":51330,"journal":{"name":"Tomography","volume":"9 6","pages":"2233-2246"},"PeriodicalIF":1.9,"publicationDate":"2023-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10747997/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138832897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transnasal Endoscopic Pituitary Surgery-The Role of a CT Scan in Individual Tailoring of Posterior Septum Size Resection. 经鼻内窥镜垂体手术--CT 扫描在个性化定制后隔膜大小切除术中的作用。

IF 1.9 4区医学

Tomography Pub Date : 2023-12-12 DOI: 10.3390/tomography9060172

Jakub Lubojacký, Lenka Čábalová, Michaela Mladoňová, Viktória Hránková, Tomáš Krejčí, Jakub Mičaník, Maria Miklošová, Lačezar Ličev, Pavel Komínek, Petr Matoušek

{"title":"Transnasal Endoscopic Pituitary Surgery-The Role of a CT Scan in Individual Tailoring of Posterior Septum Size Resection.","authors":"Jakub Lubojacký, Lenka Čábalová, Michaela Mladoňová, Viktória Hránková, Tomáš Krejčí, Jakub Mičaník, Maria Miklošová, Lačezar Ličev, Pavel Komínek, Petr Matoušek","doi":"10.3390/tomography9060172","DOIUrl":"10.3390/tomography9060172","url":null,"abstract":"Objective: This study was designed to evaluate the possibility of predicting the minimum size of septal resection for safe tumor extraction in transnasal paraseptal pituitary adenoma resection from preoperative computed tomography scans.Methods: A retrospective CT scan analysis was performed on 20 patients who underwent endoscopic pituitary surgery at the University Hospital in Ostrava. Virtual insertion of the straight instrument into the sphenoid cavity was simulated using a CT scan. The minimum septal resection size was predicted and compared to various diameters in the nasal cavity. The results were then compared with cadaveric dissections, in which septal resections were performed at 1 cm and 2 cm distances from the anterior sphenoid wall. The association between cadaver dissections and CT scan results was studied.Results: A total of 20 patients who underwent endoscopic transnasal surgery for pituitary adenoma between the years 2020 and 2021 were enrolled in the study. The mean virtual posterior septal size resection needed to reach the medial edge of the ICA with the straight instrument, without infracturing the nasal septum, was 13.2 mm. In cadavers with a 1 cm posterior septal resection, the medial edge of the ICA was reached with the straight instrument. In 2 cm resections, it was possible to reach beyond the lateral edge of the ICA.Conclusion: There is no significant correlation between the minimum septal size resection and measured diameters in the nasal cavity. According to our study, a 1 cm resection is sufficient for a non-extended pituitary tumor extraction. More extensive septal resections allow for better maneuverability and overview in the surgical field.","PeriodicalId":51330,"journal":{"name":"Tomography","volume":"9 6","pages":"2222-2232"},"PeriodicalIF":1.9,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10747678/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138832911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Imaging of Pathologies of the Temporal Bone and Middle Ear: Inflammatory Diseases, Their Mimics and Potential Complications—Pictorial Review 颞骨和中耳病变的成像：炎症性疾病、其模拟物和潜在并发症--图解评论

IF 1.9 4区医学

Tomography Pub Date : 2023-12-08 DOI: 10.3390/tomography9060170

Christopher Kloth, Annika Beck, Nico Sollmann, Meinrad Beer, Marius Horger, W. Thaiss

引用次数: 0