Acta radiologica最新文献_第6页

Improved diagnosis of adnexal lesions by integrating intra-tumoral hemorrhage detection with non-contrast MRI scoring (NCMS) using susceptibility-weighted sequences. 利用敏感性加权序列，将肿瘤内出血检测与非对比MRI评分（NCMS）相结合，提高附件病变的诊断。

IF 1.1 4区医学

Acta radiologica Pub Date : 2025-04-23 DOI: 10.1177/02841851251333551

Mayumi Takeuchi, Kenji Matsuzaki, Masafumi Harada

{"title":"Improved diagnosis of adnexal lesions by integrating intra-tumoral hemorrhage detection with non-contrast MRI scoring (NCMS) using susceptibility-weighted sequences.","authors":"Mayumi Takeuchi, Kenji Matsuzaki, Masafumi Harada","doi":"10.1177/02841851251333551","DOIUrl":"https://doi.org/10.1177/02841851251333551","url":null,"abstract":"BackgroundDynamic contrast-enhanced (DCE) magnetic resonance imaging (MRI) protocol was included into the Ovarian-Adnexal Reporting & Data System (O-RADS) MRI scoring system. To avoid the administration of contrast medium, the non-contrast MRI scoring (NCMS) system was proposed.PurposeTo evaluate the contribution of detecting intra-tumoral hemorrhage in the solid tissue of adnexal masses to improve tumor characterization and enhance the risk stratification of adnexal lesions using the NCMS system.Material and MethodsMRI findings including susceptibility-weighted sequences (T2*-weighted MR angiography [SWAN]) were retrospectively analyzed in 126 surgically confirmed adnexal tumors with solid tissue components (20 benign, 106 malignant). Solid tissue was classified as malignant based on the NCMS criteria, defined by intermediate intensity on T2-weighted (T2W) imaging, and corresponding diffusion restriction. Hemorrhage was assessed based on high intensity on T1-weighted (T1W) imaging and susceptibility-related signal voids on SWAN.ResultsThe NCMS solid tissue criteria identified malignancy with a sensitivity of 94.3%, specificity of 60%, and accuracy of 88.9%. High intensity on T1W imaging and signal voids on SWAN were observed in 23.6% and 72.6% of malignant lesions, compared to 0% and 5% in benign lesions, respectively. Hemorrhage was frequently observed in high-grade malignant tumors, or hemorrhagic subtypes. The combination of NCMS criteria and/or presence of intra-tumoral hemorrhage was associated with malignancy, yielding a sensitivity of 98.1%, specificity of 60%, and accuracy of 92.1%.ConclusionThe inclusion of intra-tumoral hemorrhage enhances the diagnostic accuracy of the NCMS for characterizing adnexal lesions. SWAN may also aid in estimating tumor grade and identifying hemorrhagic subtypes.","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"2841851251333551"},"PeriodicalIF":1.1,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143958035","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

The diagnostic performance and reader agreement of the Prostate Imaging for Recurrence Reporting system in the evaluation of local recurrence in patients with biochemically recurrent prostate cancer. 前列腺影像学复发报告系统在评估生化复发前列腺癌患者局部复发中的诊断性能及读者认同。

IF 1.1 4区医学

Acta radiologica Pub Date : 2025-04-23 DOI: 10.1177/02841851251334364

Xiang Liu, Shuyi Yang, Wenhui Deng, Dongye Li, Jun Shen

{"title":"The diagnostic performance and reader agreement of the Prostate Imaging for Recurrence Reporting system in the evaluation of local recurrence in patients with biochemically recurrent prostate cancer.","authors":"Xiang Liu, Shuyi Yang, Wenhui Deng, Dongye Li, Jun Shen","doi":"10.1177/02841851251334364","DOIUrl":"https://doi.org/10.1177/02841851251334364","url":null,"abstract":"BackgroundThe multiparametric magnetic resonance imaging (mpMRI)-based Prostate Imaging for Recurrence Reporting (PI-RR) system has been proposed to evaluate local recurrence in patients with prostate cancer (PCa) who have been treated with radiation therapy (RT) or radical prostatectomy (RP).PurposeTo evaluate the diagnostic performance and interreader agreement of the PI-RR system in the diagnosis of locally recurrent PCa remains.Material and MethodsA total of 110 patients who have biochemically recurrent PCa after RT (n = 35) or RP (n = 75) were included in this retrospective study. All patients underwent mpMRI, PSMA-PET/CT, and biopsy. Four radiologists with varying levels of expertise independently assessed the local recurrence of PCa using PI-RR. The reference standard was the biopsy pathology. The receiver operating characteristic (ROC) curve was used to evaluate the performance of PI-RR and PSMA-PET/CT, and areas under the ROC curve (AUC) were calculated. Interreader agreement across four readers was evaluated using the intraclass correlation coefficient (ICC).ResultsAmong 110 patients with biochemically recurrent PCa, 28 had local recurrence and 82 had no local recurrence. Using a cutoff of 4, the AUCs of PI-RR in the diagnosis of local recurrence were in the range of 0.61-0.84 in patients treated with RT and 0.71-0.89 in patients treated with RP. The ICC was 0.86 (95% confidence interval = 0.81-0.91).ConclusionPI-RR using a cutoff of 4 has a favorable diagnostic performance and interreader agreement, which might be alternatively used for detecting local recurrence in patients with biochemically recurrent PCa treated with RT or RP.","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"2841851251334364"},"PeriodicalIF":1.1,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143963610","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

Qualitative assessment of cartilage degeneration and morphology of the sigmoid notch using T1rho and T2 mapping: a cross-sectional study. 使用T1rho和T2作图对乙状结肠切迹软骨退变和形态的定性评估：一项横断面研究。

IF 1.1 4区医学

Acta radiologica Pub Date : 2025-04-16 DOI: 10.1177/02841851251330876

Keiko Onaka, Hirotaka Okubo, Akira Yogi, Shiho Miyazaki, Katsunori Goya, Fuminori Kanaya, Kotaro Nishida

{"title":"Qualitative assessment of cartilage degeneration and morphology of the sigmoid notch using T1rho and T2 mapping: a cross-sectional study.","authors":"Keiko Onaka, Hirotaka Okubo, Akira Yogi, Shiho Miyazaki, Katsunori Goya, Fuminori Kanaya, Kotaro Nishida","doi":"10.1177/02841851251330876","DOIUrl":"https://doi.org/10.1177/02841851251330876","url":null,"abstract":"BackgroundThe morphology of radial sigmoid notch varies widely among individuals. It remains unclear whether variations in sigmoid notch morphology influence cartilage degeneration in this region. T1rho and T2 mapping, which are useful magnetic resonance imaging (MRI) methods to assess early cartilage degeneration, may help us evaluate the relationship between the morphology and cartilage degeneration of sigmoid notch.PurposeTo investigate the relationship between cartilage degeneration of radial sigmoid notch and its morphology.Material and MethodsWe investigated the dominant wrists of 40 healthy volunteers (mean age = 34.1 years) using 3-T MRI. We measured the inclination, depth, and width of the sigmoid notch on an axial multi-echo gradient-echo, and the ulnar head diameter on coronal T2-weighted images. T1rho and T2 values of the volar, central, and dorsal cartilages of the sigmoid notch were measured on coronal T1rho and T2 mapping. We evaluated the relationships of T1rho or T2 values of the three regions with age and morphological measurements using Pearson's correlation analysis and multiple linear regression analysis.ResultsThe T2 value of the dorsal sigmoid notch positively correlated with age and width of the sigmoid notch. Multiple linear regression analysis showed that older age and wider sigmoid notch significantly increased the dorsal T2 value.ConclusionA wider sigmoid notch and aging may induce cartilage degeneration in the dorsal sigmoid notch. This association can help future studies about distal radioulnar joint diseases.","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"2841851251330876"},"PeriodicalIF":1.1,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143956378","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

Enhanced detection of autism spectrum disorder through neuroimaging data using stack classifier ensembled with modified VGG-19. 基于改进VGG-19的堆栈分类器增强自闭症谱系障碍的神经影像学检测。

IF 1.1 4区医学

Acta radiologica Pub Date : 2025-04-15 DOI: 10.1177/02841851251333974

Yazeed Alashban

{"title":"Enhanced detection of autism spectrum disorder through neuroimaging data using stack classifier ensembled with modified VGG-19.","authors":"Yazeed Alashban","doi":"10.1177/02841851251333974","DOIUrl":"https://doi.org/10.1177/02841851251333974","url":null,"abstract":"BackgroundAutism spectrum disorder (ASD) is a neurodevelopmental disease marked by a variety of repetitive behaviors and social communication difficulties.PurposeTo develop a generalizable machine learning (ML) classifier that can accurately and effectively predict ASD in children.Material and MethodsThis paper makes use of neuroimaging data from the Autism Brain Imaging Data Exchange (ABIDE I and II) datasets through a combination of structural and functional magnetic resonance imaging data. Several ML models, such as Support Vector Machines (SVM), CatBoost, random forest (RF), and stack classifiers, were tested to demonstrate which model performs the best in ASD classification when used alongside a deep convolutional neural network.ResultsResults showed that stack classifier performed the best among the models, with the highest accuracy of 81.68%, sensitivity of 85.08%, and specificity of 79.13% for ABIDE I, and 81.34%, 83.61%, and 82.21% for ABIDE II, showing its superior ability to identify complex patterns in neuroimaging data. SVM performed poorly across all metrics, showing its limitations in dealing with high-dimensional neuroimaging data.ConclusionThe results show that the application of ML models, especially ensemble approaches like stack classifier, holds significant promise in improving the accuracy with which ASD is detected using neuroimaging and thus shows their potential for use in clinical applications and early intervention strategies.","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"2841851251333974"},"PeriodicalIF":1.1,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143958093","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

A validation of ultrasound as a diagnostic tool for the detection of testicular torsion. 超声作为检测睾丸扭转的诊断工具的验证。

IF 1.1 4区医学

Acta radiologica Pub Date : 2025-04-15 DOI: 10.1177/02841851251331560

Nathalie Dahlgren, Gustav Sundström, Magnus Wagenius, Anders Navntoft, Charlotta Nilsson

{"title":"A validation of ultrasound as a diagnostic tool for the detection of testicular torsion.","authors":"Nathalie Dahlgren, Gustav Sundström, Magnus Wagenius, Anders Navntoft, Charlotta Nilsson","doi":"10.1177/02841851251331560","DOIUrl":"https://doi.org/10.1177/02841851251331560","url":null,"abstract":"BackgroundTesticular torsion (TT) is a scrotal emergency that needs urgent detection for successful treatment.PurposeTo investigate the diagnostic value of acute ultrasound and the possibility of more effective detection.Material and MethodsThis retrospective study included patients assessed with ultrasound for suspicion of TT between 2019 and 2023. Registration of parameters included symptoms, durations, ultrasound conclusions, and surgical outcome. Ultrasound assessment included inspection of the spermatic cord and testicular color Doppler signal. Sensitivity and specificity were presented with 95% confidence intervals (CIs) and symptoms with odds ratios (ORs).ResultsA total of 387 patients were included. Surgical exploration (SE) was carried out in 40 patients. TT was surgically confirmed in 23 patients. No missed cases of TT were detected. Spermatic cord rotation ≥180° showed a sensitivity of 100% (95% CI=86-100), specificity of 65% (95% CI=41-83), positive predictive value (PPV) of 79%, and negative predictive value (NPV) of 100%. Absent or reduced testicular color Doppler signal showed a sensitivity of 57% (95% CI=37-74), specificity of 77% (95% CI=53-90), PPV of 76%, and NPV of 57%. Sudden onset of pain (OR=9.44, 95% CI=2.10-42.35), earlier similar episodes (OR=6.71, 95% CI=2.27-19.89), and abdominal pain (OR=14.70, 95% CI=3.25-66.51) showed significant association with TT.ConclusionUltrasound, with focus on the spermatic cord, is reliable as a tool for the detection of TT. SE might be justified when cord rotation is ≥180°. These results can be used to develop and validate ultrasound guidelines for fast detection.","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"2841851251331560"},"PeriodicalIF":1.1,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143962567","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

Differentiating early and advanced Brucella spondylitis using an MRI-based radiomics nomogram model. 鉴别早期和晚期布氏菌脊柱炎的mri放射组学模式。

IF 1.1 4区医学

Acta radiologica Pub Date : 2025-04-15 DOI: 10.1177/02841851251331726

Yupu Li, Pengfei Zhao, Zhaojing Zhang, Ziyi Wang, Pengfei Qiao

{"title":"Differentiating early and advanced Brucella spondylitis using an MRI-based radiomics nomogram model.","authors":"Yupu Li, Pengfei Zhao, Zhaojing Zhang, Ziyi Wang, Pengfei Qiao","doi":"10.1177/02841851251331726","DOIUrl":"https://doi.org/10.1177/02841851251331726","url":null,"abstract":"BackgroundAccurate differentiation between early and advanced Brucella spondylitis is crucial for effective treatment.PurposeTo develop a magnetic resonance imaging (MRI)-based radiomics nomogram model for distinguishing between early and advanced stages of Brucella spondylitis.Material and MethodsWe conducted a retrospective analysis of clinical and imaging data from 100 patients with early Brucella spondylitis and 100 patients with advanced Brucella spondylitis. Regions of interest were marked on sagittal T2-weighted fat-suppressed lumbar MRI scans. Radiomic features were extracted and used to build a radiomics model. The significance of these features was evaluated using the Shapley Additive Explanations (SHAP) method. Intravoxel incoherent motion (IVIM) quantitative parameters were also included as clinical features, with key parameters selected to create a clinical model. A nomogram model was developed by combining clinical and radiomic features. The performance of the three models was compared and validated using receiver operating characteristic curves, calibration curves, and decision curves.ResultsEight radiomic features were selected. The clinical feature's D-value showed significant differences between the training and test sets. The nomogram model integrating both clinical and radiomic features achieved an AUC of 0.998 in the training set and 0.992 in the test set, surpassing the performance of both the clinical and radiomic models alone. Calibration and decision curves confirmed the model's strong predictive performance.ConclusionThis study shows that the MRI-based radiomics nomogram model effectively differentiates between early and advanced Brucella spondylitis, offering clinicians a valuable tool for personalized treatment across different disease stages.","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"2841851251331726"},"PeriodicalIF":1.1,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143951851","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

Anatomical features and tibial tunnel placement: influence on graft maturity at a 2-year follow-up after anterior cruciate ligament reconstruction. 解剖特征和胫骨隧道放置：前交叉韧带重建后2年随访对移植物成熟度的影响。

IF 1.1 4区医学

Acta radiologica Pub Date : 2025-04-15 DOI: 10.1177/02841851251331922

Weiqiang Lin, Xiaojie Chen, Dingfu Li, Wenjie He, Jialing Lyu

{"title":"Anatomical features and tibial tunnel placement: influence on graft maturity at a 2-year follow-up after anterior cruciate ligament reconstruction.","authors":"Weiqiang Lin, Xiaojie Chen, Dingfu Li, Wenjie He, Jialing Lyu","doi":"10.1177/02841851251331922","DOIUrl":"https://doi.org/10.1177/02841851251331922","url":null,"abstract":"BackgroundAnterior cruciate ligament (ACL) reconstruction is a common surgical procedure; however, the anatomical features influencing graft maturation post-surgery remain partially understood.PurposeTo investigate whether knee-joint anatomical structure is associated with graft maturation 2 years after ACL reconstruction (ACLR).Material and MethodsData from 54 patients who underwent arthroscopic single bundle ACLR using hamstring tendons was analyzed after a 2-year follow-up in this retrospective study. The signal-to-noise quotient (SNQ) of the intra-articular graft was measured using magnetic resonance imaging. The median SNQ was used to divide patients into a high-signal group (group A) and a low-signal group (group B). Data on patient demographics, knee anatomy, and tunnel placement were collected.ResultsSignificant differences in the graft sagittal obliquity (45 vs. 52, P = 0.001), tibial tunnel placement (29.9 ± 2.15 vs. 34.71 ± 1.72, P = 0.028), lateral tibial posterior slope (LTPS) (12 vs. 8, P < 0.001) were observed between groups A and B after ACLR (t-test or Mann-Whitney U test, P < 0.05). Univariate analysis showed that graft sagittal obliquity (odds ratio, (OR) [95% (confidence interval, CI)]: 0.88 [0.78, 0.97]) and tibial tunnel placement (OR [95% CI]: 0.78 [0.60, 0.96]) were protective factors, whereas LTPS was a risk factor for ligamentization (OR [95% CI]: 1.63 [1.22, 2.38]). No significant difference was found in sex, injury-to-operation time, or location (P > 0.05).ConclusionAnatomic features and tibial tunnel placement may influence the ligamentization process of the ACL graft, aiding clinicians in the early prediction of healing outcomes after ACLR.","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"2841851251331922"},"PeriodicalIF":1.1,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143955829","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

A survey of diagnostic reference levels for head, chest, and abdomen and pelvis CT in private diagnostic facilities in Norway. 挪威私人诊断机构对头部、胸部、腹部和骨盆CT诊断参考水平的调查。

IF 1.1 4区医学

Acta radiologica Pub Date : 2025-04-15 DOI: 10.1177/02841851251330242

Frida Gravdahl Helgesen, Mercy Afadzi Tetteh, Safora Johansen

{"title":"A survey of diagnostic reference levels for head, chest, and abdomen and pelvis CT in private diagnostic facilities in Norway.","authors":"Frida Gravdahl Helgesen, Mercy Afadzi Tetteh, Safora Johansen","doi":"10.1177/02841851251330242","DOIUrl":"https://doi.org/10.1177/02841851251330242","url":null,"abstract":"BackgroundComputed tomography (CT) scans account for 60% of the total radiation dose in medical imaging. Literature has shown that patient dose varies across CT scanners, diagnostic protocols, and technical parameters at each site, suggesting an opportunity for starting an optimization process through establishing diagnostic reference levels (DRLs).PurposeTo establish local DRLs (LDRLs) for six Norwegian private diagnostic institutes for frequently performed CT protocols.Material and MethodsDose data from 900 patients were collected from six diagnostic facilities. Data were recorded from non-contrast CT scans of the head and contrast-enhanced scans of the thorax and abdomen and pelvis from average-sized adult patients. An ANOVA test was performed to determine the variation in dose between scanners. LDRLs were determined by the 75th percentile of median values from dose indicators of CT scanners.ResultsThe difference between the means of the dose distribution from each scanner was statistically significant (P < 0,05) for all examinations. The LDRLs determined were lower, for both national and international DRLs.ConclusionObserved dose variations from the scanners indicate a need for protocol optimization for some institutes, while the LDRLs demonstrate a potential for establishing newer national diagnostic reference levels (NDRLs) in Norway.","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"2841851251330242"},"PeriodicalIF":1.1,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143959329","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

Quantitative analysis of breast lesions on contrast-enhanced mammography and comparison with histopathological results. 乳腺增强x光造影对乳腺病变的定量分析及与组织病理学结果的比较。

IF 1.1 4区医学

Acta radiologica Pub Date : 2025-04-15 DOI: 10.1177/02841851251333046

Hüseyin Bülüç, Gamze Durhan, Kemal Kösemehmetoğlu, Meltem Gülsün Akpınar, Figen Demirkazık

{"title":"Quantitative analysis of breast lesions on contrast-enhanced mammography and comparison with histopathological results.","authors":"Hüseyin Bülüç, Gamze Durhan, Kemal Kösemehmetoğlu, Meltem Gülsün Akpınar, Figen Demirkazık","doi":"10.1177/02841851251333046","DOIUrl":"https://doi.org/10.1177/02841851251333046","url":null,"abstract":"BackgroundContrast-enhanced mammography (CEM) is a promising and emerging digital mammography technique that improves diagnostic performance.PurposeTo quantitatively evaluate breast lesions on CEM and to investigate the effectiveness of CEM in differentiating benign lesions from malignancies. The secondary aim was to evaluate the effectiveness in lesion characterization of quantitative parameters derived from CEM, specifically relative signal density (RSD) and relative signal change (RSC).Material and MethodsA retrospective analysis was conducted of 170 lesions in 164 female patients who underwent CEM. Lesions were grouped as benign, non-infiltrating, and infiltrating cancer. RSD between lesion and background, including fatty and glandular tissue, was measured. RSCs between former (CC) and latter (MLO) images were calculated and contrast enhancement patterns were obtained. The association between CEM values and pathological results was analyzed.ResultsRelative signal differences on both CC and MLO CEM views showed higher relative signal density in infiltrating tumors than benign ones regardless of whether glandular tissue or fat tissue was used in proportion while different infiltrating malignant subgroups showed no statistical significance according to quantitative analysis (P < 0.001). No significant differences in contrast enhancement patterns (ascending, steady, and descending) were seen either between benign and malignant groups or among malignant subtypes.ConclusionCEM can be used to distinguish between benign and malignant breast lesions, regardless of fat or glandular tissue. However, no difference was observed between benign and malignant lesions according to the contrast-enhancement patterns. Therefore, contrast enhancement patterns in CEM and breast MRI may differ.","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"2841851251333046"},"PeriodicalIF":1.1,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143959596","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

Comparison of GRE versus SSFP-based cardiac T1-mapping in device patients. GRE与基于ssfp的心脏t1制图在器械患者中的比较

IF 1.1 4区医学

Acta radiologica Pub Date : 2025-04-15 DOI: 10.1177/02841851251332461

Noelle C Garster, Kevin Koch, El-Sayed H Ibrahim, Jason C Rubenstein

{"title":"Comparison of GRE versus SSFP-based cardiac T1-mapping in device patients.","authors":"Noelle C Garster, Kevin Koch, El-Sayed H Ibrahim, Jason C Rubenstein","doi":"10.1177/02841851251332461","DOIUrl":"https://doi.org/10.1177/02841851251332461","url":null,"abstract":"BackgroundCardiac magnetic resonance (CMR) is challenging in patients implanted with metallic devices, such as pacemakers or defibrillators, given metallic susceptibility artifacts. The technique of T1-mapping investigates interstitial fibrosis. The most used method for myocardial T1-mapping is the modified Look-Locker Inversion recovery sequence (MOLLI) using balanced steady-state free precession (SSFP). However, SSFP is susceptible to off-resonance artifacts, leading to errors. Gradient echo (GRE) sequences are less prone to these artifacts.PurposeTo investigate whether T1-mapping using GRE was comparable to SSFP in this population.Material and MethodsPre/post-contrast T1-mapping was performed on 16 devices utilizing MOLLI with SSFP and GRE strategies at 1.5 T, as well as 10 non-device controls. The difference in mean T1 time by SSFP versus GRE (both pre- and post-contrast for each slice) for device patients was analyzed.ResultsNative T1 for the device cohort was 1053 ± 94 ms for SSFP and 969 ± 83 ms for GRE. GRE T1 measurements were shorter than SSFP measurements (difference over all slices for SSFP vs. GRE pre-/post-contrast were 74 ms and 27 ms). Mean λ for GRE (devices) was 0.520 ± 0.194 (p = 0.30). λ for SSFP (devices) was 0.536 ± 0.124 (P = 0.08). There was no difference in λ between SSFP versus GRE in device patients (P = 0.91). The percentage of segments identified as artifact on T1 maps for device patients was 24% and 45% for GRE and SSFP, respectively.ConclusionCompared to SSFP, T1 values using GRE were consistently shorter, while λ values remained equivalent. There was less visual artifact on GRE images, suggesting advantageous utility over SSFP in patients with cardiac devices.","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"2841851251332461"},"PeriodicalIF":1.1,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143959618","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