Acta radiologica open最新文献

A deep learning algorithm for radiographic measurements of the hip versus human CT measurements: An intermodality agreement study.

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Acta radiologica open Pub Date : 2025-03-27 eCollection Date: 2025-04-01 DOI: 10.1177/20584601251330554

Christian Greve Jensen, Benjamin Schnack Rasmussen, Søren Overgaard, Claus Varnum, Martin Haagen Haubro, Janni Jensen

{"title":"A deep learning algorithm for radiographic measurements of the hip versus human CT measurements: An intermodality agreement study.","authors":"Christian Greve Jensen, Benjamin Schnack Rasmussen, Søren Overgaard, Claus Varnum, Martin Haagen Haubro, Janni Jensen","doi":"10.1177/20584601251330554","DOIUrl":"10.1177/20584601251330554","url":null,"abstract":"Background: Hip dysplasia (HD) is a prevalent cause of non-traumatic hip pain, which may result in osteoarthritis. Radiological measurements of HD exhibit variability based on reader and imaging modality, why it is important to know the agreement between different measurement methods.Purpose: To estimate agreement between measurements of lateral center edge angle (LCEA) and acetabular inclination angle (AIA) made, respectively, on Computed Tomography (CT) scans by humans and radiographs analyzed by an algorithm. To estimate impact of pelvic rotation on agreement between CT and radiographic measurements.Material and methods: CT measurements were retrospectively extracted from 172 radiology reports. Radiographs were analyzed using an algorithm. Bland-Altman analysis assessed agreement between CT and radiographic measurements. Regression analyses estimated impact of pelvic rotation on inter-modality agreement.Results: Mean measured bias (95% confidence interval [CI]) between CT and radiographs for LCEA of right/left hip was 5.53° (95% CI: 4.81 to 6.24) and 5.13 (95% CI: 4.43 to 5.83), respectively. Corresponding values for right/left AIA were 1.08 (95% CI: 0.49 to 1.67) and -0.03 (95% CI: -0.60 to 0.05). Pelvic rotation affected right LCEA and AIA measurements, with a change in obturator foramen index of, respectively, 0.35 and 0.6 resulting in approximately 2° change in values.Conclusion: There was a significant difference in agreement of 5° between CT and radiographs for the LCEA bilaterally. The difference for the AIA was between 0 and 1°, probably of little clinical significance. Pelvic rotation slightly affected bias of the right LCEA, suggesting minimal clinical impact of a slightly rotated pelvis.","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":"14 4","pages":"20584601251330554"},"PeriodicalIF":0.9,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11948554/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143756209","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

Left bundle branch block-induced pseudo-infarction: Cardiac MRI pitfall.

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Acta radiologica open Pub Date : 2025-03-25 eCollection Date: 2025-03-01 DOI: 10.1177/20584601251322487

Sebastian Flynn, Desmond Killick, Ken McDonald, Jonathan Dodd

引用次数: 0

Diagnostic yield and complications of CT-guided biopsy of lung lesions as a radiological outpatient clinic procedure.

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Acta radiologica open Pub Date : 2025-03-20 eCollection Date: 2025-03-01 DOI: 10.1177/20584601251326485

Katrine Bitsch Johansen, John Valtersson, Christian B Laursen, Bo Mussmann, Benjamin Rasmussen, Ole Graumann, Pia Iben Pietersen

{"title":"Diagnostic yield and complications of CT-guided biopsy of lung lesions as a radiological outpatient clinic procedure.","authors":"Katrine Bitsch Johansen, John Valtersson, Christian B Laursen, Bo Mussmann, Benjamin Rasmussen, Ole Graumann, Pia Iben Pietersen","doi":"10.1177/20584601251326485","DOIUrl":"10.1177/20584601251326485","url":null,"abstract":"Background: Computerized tomography-guided transthoracic needle biopsy (CT-TTNB) plays an important role in the diagnostic work-up of lung lesions. The literature reports varying results on complication rates, severity of complications, and diagnostic yield.Purpose: To evaluate CT-TTNB as a radiological outpatient clinic procedure and explore diagnostic yield and complication rates.Material and methods: Between January 2017 and October 2019, a total of 559 patients underwent CT-TTNB. Patient records and CT scans were retrospectively reviewed and patient characteristics, lesion characteristics, biopsy procedure, and per- and post-procedural complications, as well as pathological diagnosis, were registered.Results: Of 559 patients included, 511 had biopsies performed. Thereby, 48 biopsies (8.6%) were discontinued because of patient compliance issues and/or the occurrence of pneumothorax before the biopsy was performed. The overall pneumothorax rate was 49.2% (n = 275 of 559 patients). Insertion of a drainage catheter was needed in 85 of the 275 patients with pneumothorax. Parenchymal bleeding was seen in 26.5% of the patients and haemoptysis in 5.5%. No cases of bleeding or haemoptysis required intervention or admission. Small mean lesion size and increased distance from pleura to the lesion were associated with a higher occurrence of complications. A conclusive pathological diagnosis was obtained in 278 of 511 (54.4%) biopsies. No patients were re-admitted after the two-hour observational period in the radiological department.Conclusion: CT-TTNB as an outpatient clinic procedure is feasible but has a moderate diagnostic yield and relatively high complication rates for minor complications.","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":"14 3","pages":"20584601251326485"},"PeriodicalIF":0.9,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11926819/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143694595","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

Hyperintensity of the left piriform cortex and amygdala on T2-weighted FLAIR images in patients with probable Alzheimer's disease correlates with cerebral cortical atrophy.

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Acta radiologica open Pub Date : 2025-02-04 eCollection Date: 2025-02-01 DOI: 10.1177/20584601251317629

Hiroshi Ishizaka, Akiko Sekine, Minoru Naka, Saeki Nakano, Hiroyuki Nagase, Yoshito Tsushima

{"title":"Hyperintensity of the left piriform cortex and amygdala on T2-weighted FLAIR images in patients with probable Alzheimer's disease correlates with cerebral cortical atrophy.","authors":"Hiroshi Ishizaka, Akiko Sekine, Minoru Naka, Saeki Nakano, Hiroyuki Nagase, Yoshito Tsushima","doi":"10.1177/20584601251317629","DOIUrl":"10.1177/20584601251317629","url":null,"abstract":"Background: The left piriform cortex and amygdala (PC&A) tend to be slightly hyperintense relative to the right PC&A on T2-weighted fluid-attenuated inversion recovery (T2W-FLAIR) images in patients with probable Alzheimer's disease (pAD). This likely represents the antecedent and thus advanced degeneration of the left PC&A.Purpose: To investigate the relationship between left PC&A hyperintensities and cerebral cortical atrophy on magnetic resonance (MR) voxel-based morphometry in patients with pAD and discuss how this finding could relate to AD progression.Material and methods: Patients with pAD (n = 47; age range = 68-93 years, mean = 80.8 ± 6.7 years; 14 men and 33 women) who underwent T2W-FLAIR imaging and MR morphometric study using a voxel-based specific regional analysis system for AD (VSRAD) were retrospectively examined. To measure signal intensity ratios of the left to right PC&A (L-PC&A/R-PC&A), regions of interest (ROIs) were set on the transaxial images in which both PC&As were most broadly depicted; the ROIs were defined as large as possible. Correlations between the L-PC&A/R-PC&A and medial temporal lobe cortical atrophy (MTLCA) as well as whole cerebral cortical atrophy (WCCA) on VSRAD were determined. Correlation between the L-PC&A/R-PC&A and age was also determined.Results: The L-PC&A/R-PC&A correlated with both MTLCA (r = 0.375, p = .010, 95% confidence interval [CI] = 0.095-0.600) and WCCA (r = 0.576, p < .001, 95% CI = 0.343-0.742). The L-PC&A/R-PC&A did not correlate with age (r = 0.013, p = .932, 95% CI = -0.282-0.305).Conclusion: Left-sided dominance of PC&A degeneration appeared to accelerate with the progression of AD stages.","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":"14 2","pages":"20584601251317629"},"PeriodicalIF":0.9,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11795602/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143366870","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

Cardiac metastasis of a soft tissue sarcoma: Case report and review of literature. 软组织肉瘤心脏转移一例报告及文献复习。

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Acta radiologica open Pub Date : 2025-01-07 eCollection Date: 2025-01-01 DOI: 10.1177/20584601241313111

Ayoub Chetoui, Oula Alouazen, Lamya Yazghi Martahe, Asmae Oulad Amar, Siham Alaoui Rachidi

引用次数: 0

Endovascular stent graft treatment for stenosis in isolated infrarenal abdominal aortic dissection: A case report. 血管内支架治疗孤立性肾下腹主动脉夹层狭窄1例。

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Acta radiologica open Pub Date : 2024-12-16 eCollection Date: 2024-12-01 DOI: 10.1177/20584601241309006

Kengo Ohta, Risa Arahata, Junji Horiba, Hitomi Kaneko, Kurando Kondo

引用次数: 0

Intense fibroblast activation protein inhibitor localization around the site of embolized gastroduodenal artery in a patient with metachronous pancreatic adenocarcinoma: A potential pitfall in positron imaging. 异时性胰腺腺癌患者胃十二指肠动脉栓塞部位周围强烈的成纤维细胞活化蛋白抑制剂定位：正电子成像的一个潜在缺陷。

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Acta radiologica open Pub Date : 2024-12-09 eCollection Date: 2024-12-01 DOI: 10.1177/20584601241307350

Ahmed Saad Abdlkadir, Hasan Alalawi, Akram Al-Ibraheem

引用次数: 0

Automatic segmentation of extensor carpi ulnaris tendon and detection of tendinosis with convolutional neural networks. 尺侧腕伸肌腱的自动分割及卷积神经网络检测。

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Acta radiologica open Pub Date : 2024-11-30 eCollection Date: 2024-11-01 DOI: 10.1177/20584601241297530

Mathias Hämäläinen, Markus Sormaala, Tuomas Kaseva, Eero Salli, Sauli Savolainen, Marko Kangasniemi

{"title":"Automatic segmentation of extensor carpi ulnaris tendon and detection of tendinosis with convolutional neural networks.","authors":"Mathias Hämäläinen, Markus Sormaala, Tuomas Kaseva, Eero Salli, Sauli Savolainen, Marko Kangasniemi","doi":"10.1177/20584601241297530","DOIUrl":"https://doi.org/10.1177/20584601241297530","url":null,"abstract":"Background: Extensor Carpi Ulnaris (ECU) tendinosis, a frequent cause of chronic wrist pain, requires prompt diagnosis to prevent disability. This study demonstrates the use of convolutional neural networks (CNNs) for automated detection and segmentation of the ECU tendon and tendinosis in 2D axial wrist MRI.Purpose: To develop a CNN for the automated detection of ECU tendon and automatic delineation of tendinosis in 2D wrist MRI. The study serves as a proof-of-concept, demonstrating the feasibility of automating the segmentation of musculoskeletal structures in wrist MRI and offering an efficient solution for detecting tendinosis.Material and methods: In a retrospective analysis of 1081 patients undergoing wrist MRI imaging, 46 patients exhibited tendinosis. Two deep learning-based methods for segmenting the ECU tendon and T2 hyperintense lesions indicative of tendinosis from 2D axial wrist MRI series were developed and compared in this study. Both methods were trained and evaluated over all 46 patients using Dice score as the main evaluation metric.Results: The mean ECU tendon segmentation Dice score ranged from 0.61 to 0.64 (± 0.27 to 0.31). Tendinosis detection yielded a Dice score of 0.38 for both the threshold method (±0.19) and the CNN (±0.22). A Dice score > 0.50 indicated successful detection, with our methods achieving a detection rate of 72-76%.Conclusion: The developed CNN effectively detected and segmented the ECU tendon in 2D MRI series. Tendinosis was detected with comparable accuracy using both signal intensity thresholding and the trained CNN method.","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":"13 11","pages":"20584601241297530"},"PeriodicalIF":0.9,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11608437/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142775136","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

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":"13 10","pages":"20584601241288509"},"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":"13 10","pages":"20584601241279337"},"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