Acta radiologica open最新文献

Differential diagnosis between low-risk and high-risk thymoma: Comparison of diagnostic performance of radiologists with and without deep learning model. 低风险和高风险胸腺瘤的鉴别诊断：使用深度学习模型和不使用深度学习模型的放射科医生诊断效果比较。

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Acta radiologica open Pub Date : 2024-10-04 eCollection Date: 2024-10-01 DOI: 10.1177/20584601241288509

Yuriko Yoshida, Masahiro Yanagawa, Yukihisa Sato, Tomo Miyata, Atsushi Kawata, Akinori Hata, Noriyuki Tomiyama

{"title":"Differential diagnosis between low-risk and high-risk thymoma: Comparison of diagnostic performance of radiologists with and without deep learning model.","authors":"Yuriko Yoshida, Masahiro Yanagawa, Yukihisa Sato, Tomo Miyata, Atsushi Kawata, Akinori Hata, Noriyuki Tomiyama","doi":"10.1177/20584601241288509","DOIUrl":"https://doi.org/10.1177/20584601241288509","url":null,"abstract":"Background: There are few CT-based deep learning (DL) studies on thymoma according to the World Health Organization classification.Purpose: To develop a CT-based DL model to distinguish between low-risk and high-risk thymoma and to compare the diagnostic performance of radiologists with and without the DL model.Material and methods: 159 patients with 160 thymomas were included. A fine-tuning VGG16 network model with Adam optimizer was used, followed by k-fold cross validation. The dataset consisted of three axial slices, including the maximum tumor size from the CT volume data. The data were augmented 50 times by rotation, zoom, shear, and horizontal/vertical flip. Three independent networks for the CT dataset were considered, and the result was determined by voting. Three radiologists independently diagnosed thymomas with and without the model. The area under the curve (AUC) of the diagnostic performance was compared using receiver operating characteristic analysis.Results: Accuracy of the DL model was 71.3%. Diagnostic performance of the radiologists was as follows: AUC and accuracy without the DL model, 0.61-0.68 and 61.9%-69.3%; and with the DL model, 0.66-0.69 and 68.1%-70.0%, respectively. AUC of the diagnostic performance showed no significant differences between radiologists with and without the DL model. The DL model tended to increase the diagnostic accuracy, but AUC was not significantly improved.Conclusion: Diagnostic performance of the DL was comparable to that of radiologists. The DL model assistance tended to increase diagnostic accuracy.","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11457241/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142395657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cranial nerves bridging the middle ear and cerebellum causing cerebellar peduncle abscess: A case report. 连接中耳和小脑的颅神经导致小脑脚脓肿：病例报告。

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Acta radiologica open Pub Date : 2024-10-01 DOI: 10.1177/20584601241279337

Prabin Shrestha, Mani Ratnesh S Sandhu, Katherine J Jensen, Satoka Shidoh, Satoshi Yamaguchi

{"title":"Cranial nerves bridging the middle ear and cerebellum causing cerebellar peduncle abscess: A case report.","authors":"Prabin Shrestha, Mani Ratnesh S Sandhu, Katherine J Jensen, Satoka Shidoh, Satoshi Yamaguchi","doi":"10.1177/20584601241279337","DOIUrl":"10.1177/20584601241279337","url":null,"abstract":"Cerebellar abscess is a reported complication of chronic suppurative otitis media (CSOM) and is life threatening at times. It usually develops by direct spread of CSOM through the bony erosion in the petrous bone or by thrombophlebitis of the sigmoid sinus. However, an alternative pathway of infection transmission from the petrous bone to the cerebellum through the anatomical bridge of the cranial nerves has possibly not been described before. A 63-year-old female patient with CSOM and cholesteatoma developed ataxia and right facial palsy. Computed tomography (CT) showed bone erosion of the right petrous bone suggesting middle ear infection. Post-contrast MRI revealed an enhancement of swollen 7th/8th nerve complex, suggesting neuritis, and cholesteatoma in the right petrous bone. It also showed ring enhancing lesion in the cerebellar peduncle of the same side suggesting brain abscess. Surgical intervention was performed emergently and pus aspirated. She also underwent mastoidectomy and removal of cholesteatoma later by the otolaryngology team and finally got better. This case illustrates that CSOM can cause cerebellar abscess by spreading infection via anatomical bridge of the cranial nerves without direct invasion from the temporal bone or thrombophlebitis of sinus.","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11526159/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142559598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Computed tomography patterns and clinical outcomes of radiation pneumonitis in non-small-cell lung cancer patients. 非小细胞肺癌患者放射性肺炎的计算机断层扫描模式和临床结果。

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Acta radiologica open Pub Date : 2024-10-01 DOI: 10.1177/20584601241288502

Ji Hoon Choi, Hee Kang, Ji Su Lim, Ki-Nam Lee

{"title":"Computed tomography patterns and clinical outcomes of radiation pneumonitis in non-small-cell lung cancer patients.","authors":"Ji Hoon Choi, Hee Kang, Ji Su Lim, Ki-Nam Lee","doi":"10.1177/20584601241288502","DOIUrl":"https://doi.org/10.1177/20584601241288502","url":null,"abstract":"Background: Radiation pneumonitis (RP) is not an uncommon complication in lung cancer patients undergoing radiation therapy (RT) and symptomatic RP can affect their quality of life.Purpose: To investigate the CT findings of RP in non-small cell lung cancer (NSCLC) patients and their relationship with clinical outcomes.Materials and methods: We reviewed data from 240 NSCLC patients who underwent RT between 2014 and 2022. CT findings of RP were evaluated for parenchymal abnormalities and distribution, which were then classified into three patterns: localized pneumonia (LP), cryptogenic organizing pneumonia (COP), and acute interstitial pneumonia (AIP). Clinical outcomes of RP were evaluated based on Common Terminology Criteria for Adverse Events (CTCAE) grade.Results: Of the 153 patients, 135 developed RP. The most common pattern was LP (n = 78), followed by COP (n = 30) and AIP (n = 25). Among the three CT patterns, CTCAE grade and days between the start of RT and the onset of RP (RT-RP days) were statistically significantly different (p < 0.05). The patients with AIP patterns exhibited higher CTCAE grade, and fewer RT-RP days compared to those with non-AIP patterns (p < 0.05). In these patients, lung-to-lung metastasis and underlying interstitial lung abnormality were observed more frequently (p < 0.05). Underlying pulmonary fibrosis, the AIP pattern, and higher CT extent scores were more frequently observed in higher CTCAE grade group (p < 0.001). In multiple regression analysis, age, bilateral distribution, RT-RP days, and CT extent score ≥3 were independent predicting factors for higher CTCAE grade.Conclusions: RP in NSCLC patients can be classified into LP, COP, and AIP patterns and they exhibit different severities in clinical outcomes.","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11459547/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142395656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Invasive trigeminal ganglioneuroma: A case report and review of the literature. 侵袭性三叉神经节瘤：病例报告和文献综述。

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Acta radiologica open Pub Date : 2024-09-09 eCollection Date: 2024-09-01 DOI: 10.1177/20584601241283780

Rama Krishna Narra, Kavya Are, Parveen Nuzhat

引用次数: 0

A case of primary osteosarcoma in the occipital bone: A relatively common tumor in an uncommon location. 一例枕骨原发性骨肉瘤：不常见部位的一种相对常见的肿瘤。

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Acta radiologica open Pub Date : 2024-08-30 eCollection Date: 2024-09-01 DOI: 10.1177/20584601241279134

Kezhou Xing, Guoli Ren, Shuning Liu, Chuanchen Zhang

引用次数: 0

To biopsy or not to biopsy adrenal mass: is that the question? 肾上腺肿块活检还是不活检：这是个问题吗？

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Acta radiologica open Pub Date : 2024-08-21 eCollection Date: 2024-08-01 DOI: 10.1177/20584601241269581

Edouard Purenne, Erika Cornu, Vincent Mezzarobba, Pauline Juttet, Sébastien Cimarelli, Emmanuel Watkin, Anne-Cécile Paepegaey

引用次数: 0

Hemodynamic evaluation of intracranial arteriovenous malformations: Pre- and post-treatment 2D phase-contrast MRI measurements. 颅内动静脉畸形的血液动力学评估：治疗前和治疗后的二维相位对比 MRI 测量。

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Acta radiologica open Pub Date : 2024-08-08 eCollection Date: 2024-08-01 DOI: 10.1177/20584601241269608

Maria Correia de Verdier, Elisabeth Ronne-Engström, Ljubisa Borota, Johan Wikström

{"title":"Hemodynamic evaluation of intracranial arteriovenous malformations: Pre- and post-treatment 2D phase-contrast MRI measurements.","authors":"Maria Correia de Verdier, Elisabeth Ronne-Engström, Ljubisa Borota, Johan Wikström","doi":"10.1177/20584601241269608","DOIUrl":"10.1177/20584601241269608","url":null,"abstract":"Background: Hemodynamic changes are seen in the feeding arteries of arteriovenous malformations (AVMs). Phase-contrast MRI (PC-MRI) enables the acquisition of hemodynamic information from blood vessels. There is insufficient knowledge on which flow or velocity parameter best discriminates AVMs from healthy subjects.Purpose: To evaluate PC-MRI-measured flow and velocity in feeding arteries of AVMs before and, when possible, also after treatment and to compare these measurements to corresponding measurements in healthy controls.Materials and methods: Highest flow (HF), lowest flow (LF), mean flow (MF), peak systolic velocity (PSV), end-diastolic velocity (EDV), and mean velocity (MV) were measured in feeding arteries in patients with intracranial AVMs using 2D PC-MRI at 3 T. Measurements were compared to previously reported values in healthy individuals. Values in patients above the 95th percentile in the healthy cohort were categorized as pathological. Nidus volume was measured using 3D time-of-flight MR angiography.Results: Ten patients with diagnosed AVMs were examined with PC-MRI. Among these, three patients also underwent follow-up PC-MRI after treatment. Pathological velocities (PSV, EDV, and MV) were seen in all five subjects with a nidus larger or equal to 5.7 cm3, whereas pathological flow values were not seen in all, that is, pathologic HF in three, pathologic LF in two, and pathologic MF in two. After treatment, there was a decrease in flow and velocity (all measured parameters). After treatment, velocities (PSV, EDV, and MV) were no longer abnormal compared to healthy controls.Conclusion: Patients with a large AVM nidus show pathological velocities, but less consistent flow increases. Following treatment, velocities normalize.","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11311173/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141918217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lipomatous pseudohypertrophy of the pancreas mimicking liposarcoma: A case report. 模仿脂肪肉瘤的胰腺脂肪瘤性假肥大：病例报告。

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Acta radiologica open Pub Date : 2024-08-01 DOI: 10.1177/20584601241259847

Tomomi Kamimura, Takashi Katsube, Takeshi Nishi, Yasunari Kawabata, Yoshitsugu Tajima, Asuka Araki, Yasushi Kaji

引用次数: 0

Acute on chronic pancreatitis affecting the ectopic pancreas located in the jejunal mesentery: A case report. 影响位于空肠系膜异位胰腺的急性和慢性胰腺炎：病例报告。

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Acta radiologica open Pub Date : 2024-07-30 eCollection Date: 2024-08-01 DOI: 10.1177/20584601241269617

Kazuya Okamura, Emi Ishibashi, Kazumi Araki, Yoshiko Kanasaki, Koji Kodama, Akiyoshi Kanazawa, Hideyuki Onuma

引用次数: 0

Evaluation of an in-use chest CT protocol in lung cancer screening - A single institutional study 评估肺癌筛查中使用中的胸部 CT 方案 - 一项单一机构研究

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Acta radiologica open Pub Date : 2024-07-01 DOI: 10.1177/20584601241256005

S. Naimi, M. Tetteh, Haseem Ashraf, S. Johansen

{"title":"Evaluation of an in-use chest CT protocol in lung cancer screening - A single institutional study","authors":"S. Naimi, M. Tetteh, Haseem Ashraf, S. Johansen","doi":"10.1177/20584601241256005","DOIUrl":"https://doi.org/10.1177/20584601241256005","url":null,"abstract":"Lung cancer is the most common cause of cancer-related death worldwide and therefore there has been a growing demand for low-dose computed tomography (LDCT) protocols. To investigate and evaluate the dose and image quality of patients undergoing lung cancer screening (LCS) using LDCT in Norway. Retrospective dosimetry data, volumetric CT dose index (CTDIvol) and dose-length product (DLP), from 70 average-size and 70 large-size patients who underwent LDCT scan for LCS were included in the survey. Effective dose and size-specific dose were calculated for each examination and were compared with the American Association of Physicists in Medicine (AAPM) requirement. For a quantitative image quality analysis, noise, signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR) were determined for different regions in the chest with two iterative reconstruction techniques, iDose and Iterative Model Reconstruction. Differences in dose and image quality between average-size and large-size patients were evaluated by Independent sample t test, and Wilcoxon signed rank test within the same patient group. The independent sample t test revealed significant differences ( p < .05) in dose values between average-size and large-size patients. Mean CTDIvol and DLP for average-size patients were 2.8 mGy and 115 mGy.cm, respectively, with appropriate increment for the large-size patients. Image quality (image noise, SNR, and CNR) did not significantly differ between patient groups when images were reconstructed with a model based iterative reconstruction algorithm. The screening protocol assessed in this study resulted in CTDIvol values that were compliant with AAPM recommendation. No significant differences in objective image quality were found between patient groups.","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141703682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0