Acta radiologica最新文献

{"title":"Associations between clot burden measured by refined modified Miller score and cardiac biomarkers in patients with intermediate-high risk pulmonary embolism.","authors":"Emilie Sonne-Holm, Matilde Winther-Jensen, Lia E Bang, Jørn Carlsen, Samir Jawad, Peter Sommer Ulriksen, Jesper Kjærgaard","doi":"10.1177/02841851261466180","DOIUrl":"https://doi.org/10.1177/02841851261466180","url":null,"abstract":"<p><p>BackgroundComputed tomography pulmonary angiography (CTPA) is essential for diagnosing pulmonary embolism (PE); however, the clinical and prognostic relevance of clot burden remains uncertain.PurposeTo evaluate the clinical significance and prognostic value of the refined Modified Miller Score (rMMS) in patients with intermediate- to high-risk PE.Material and MethodsIn total, 204 patients with intermediate- to high-risk PE who underwent baseline CTPA were included. Data on demographics, comorbidities, and biomarkers (troponin I/T, lactate, and D-dimer) were collected at admission. Patients were stratified by rMMS quartiles (Q1-Q4). Trends were analyzed using Cochran-Armitage and Jonckheere-Terpstra tests, while associations were assessed using Pearson's correlation and multivariable logistic regression.ResultsBaseline characteristics were comparable across quartiles. Higher rMMS was associated with alcohol use and prior arrhythmia. Increasing rMMS correlated with higher right ventricle:left ventricle ratio, increased heart rate, lower systolic blood pressure, and greater oxygen requirement. Weak correlations were observed between rMMS and lactate and troponin T, whereas no significant associations were found with troponin I or D-dimer. Crucially, rMMS was not associated with in-hospital outcomes or 1-year mortality.ConclusionThe rMMS reflects right ventricular strain in PE but does not appear suitable for prognostic risk stratification or guiding management decisions.</p>","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"2841851261466180"},"PeriodicalIF":1.2,"publicationDate":"2026-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149073167","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}

{"title":"Multiparametric MRI differentiation of ovarian endometriomas and hemorrhagic cysts: Quantitative shading, ADC measurements, and morphological sign analysis.","authors":"Ahmet Tuğrul Akkuş, Said Ali Atalay, Emre Özil, Fadime Güven","doi":"10.1177/02841851261489733","DOIUrl":"https://doi.org/10.1177/02841851261489733","url":null,"abstract":"<p><p>BackgroundDifferentiating ovarian endometriomas from hemorrhagic cysts matters because their management differs.PurposeTo evaluate whether a multiparametric magnetic resonance imaging (MRI) approach improves differentiation of endometriomas from hemorrhagic cysts over conventional subjective assessment.Material and MethodsIn total, 83 hemorrhagic cystic ovarian lesions (45 endometriomas, 38 hemorrhagic cysts) on 1.5-T pelvic MRI were retrospectively evaluated by two independent blinded radiologists (with 20 and 7 years of experience in abdominopelvic and gynecological MRI) for quantitative T1 and T2 signal intensities (quantitative shading), intralesional and perilesional apparent diffusion coefficient (ADC), lesion size, and the T2 shading and dark-spot signs. ROC analysis, logistic regression, and inter-/intra-observer agreement were assessed, and models were compared with the DeLong test.ResultsEndometriomas were larger (55.0 vs. 40.7 mm; <i>P</i> = 0.007), had lower intralesional ADC (1.054 vs. 1.563 ×10^-3 mm²/s; <i>P</i> = 0.002), and a greater T1-T2 signal difference (<i>P</i> < 0.001), which had the highest single-parameter accuracy (AUC = 0.799). There was no statistically significant difference in the T2 shadowing sign between the groups (91.1% vs. 81.6%; <i>P</i> = 0.342). The T2 dark-spot sign was specific (100%) but insensitive (24.4%). Perilesional ADC did not differ (<i>P</i> = 0.112) and showed poor inter-observer agreement (ICC = 0.064). A multiparametric model (quantitative shading, intralesional ADC, lesion size) outperformed conventional MRI (AUC = 0.894 vs. 0.670; DeLong <i>P</i> < 0.001), increasing sensitivity from 24.4% to 88.9% at comparable specificity.ConclusionA multiparametric model combining quantitative shading, intralesional ADC and lesion size significantly improved differentiation over conventional MRI, whereas perilesional ADC showed no diagnostic utility at 1.5 T.</p>","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"2841851261489733"},"PeriodicalIF":1.2,"publicationDate":"2026-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149056856","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}

{"title":"Could central bronchial deformity in pulmonary sarcoidosis be a sign of upper lobe fibrosis?","authors":"Sinem Ermin, Lale Duman, Seher Susam, Fatma Demirci Üçsular, Nimet Aksel, Onur Fevzi Erer","doi":"10.1177/02841851261489274","DOIUrl":"https://doi.org/10.1177/02841851261489274","url":null,"abstract":"<p><p>BackgroundCentral bronchial deformity (CBD) has been proposed as a radiological marker of a fibrotic upper-lobe phenotype in pulmonary sarcoidosis.PurposeTo evaluate whether CBD and predefined high-resolution computed tomography (HRCT) findings at diagnosis predict the upper-lobe shrinkage (SUL) within 1 year in patients with pulmonary sarcoidosis with upper-lobe involvement.Material and MethodsThis retrospective cohort included adults with histopathologically confirmed pulmonary sarcoidosis who underwent HRCT and chest radiography at diagnosis and approximately 1 year later. Patients with baseline SUL were excluded. Two radiologists independently assessed CBD and predefined HRCT findings. SUL was evaluated on chest radiographs using prespecified signs of upper-lobe volume loss.ResultsAmong 79 patients, baseline CBD was present in 33 (42%). Compared with patients without CBD, those with CBD were older (54 ± 12 vs. 46 ± 14 years; <i>P</i> = 0.009), had greater smoking exposure (25 (12-35) vs. 15 (6-20) pack-years; <i>P</i> <i>=</i> 0.046), more frequently received treatment (67% vs. 39%; <i>P</i> = 0.029), and had lower spirometric values. Neither baseline CBD (<i>P</i> = 0.966) nor other baseline HRCT findings were associated with incident SUL. At 1 year, SUL was more frequent among patients with CBD (28% vs. 3%; <i>P</i> = 0.007) and ground-glass attenuation (29% vs. 10%; <i>P</i> = 0.031).ConclusionCBD was associated with lung remodeling and lower spirometric values but did not predict SUL within 1 year. Its associaton with SUL at 1 year suggests that CBD may be a contemporaneous marker of advanced parenchymal involvement and airway distortion rather than a short-term predictor.</p>","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"2841851261489274"},"PeriodicalIF":1.2,"publicationDate":"2026-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149023614","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}

{"title":"Improved upper abdominal MRI with VIBE sequences using deep learning-supported k-space sampling in a cohort undergoing MRI for gynecologic diseases.","authors":"Klaudia Malec, Jakob Heimer, Antonio Marketin, Dominik Nickel, Elisabeth Weiland, Rahel A Kubik-Huch, Daniel Hausmann","doi":"10.1177/02841851261486041","DOIUrl":"https://doi.org/10.1177/02841851261486041","url":null,"abstract":"<p><p>BackgroundVolumetric interpolated breath-hold examination (VIBE) is widely used in upper abdominal MRI but can be limited by low signal-to-noise ratio (SNR), especially when rapid acquisition is prioritized. Deep learning (DL)-enhanced reconstruction may improve image quality without extending acquisition time.PurposeTo compare subjective image quality, artifacts, noise, and estimated SNR and contrast-to-noise ratio (CNR) between DL-supported and standard (ST) VIBE sequences of the upper abdomen in women undergoing pelvic MRI, including the effect of contrast enhancement.Material and MethodsThis prospective study included 60 women (mean age 42.1 ± 14.7 years). Four axial sequence types were evaluated: ST and DL VIBE, both non-contrast (NC) and contrast-enhanced (CE). Three radiologists rated image quality, artifacts, and noise using a standardized 4-point Likert scale. Interobserver agreement and the effects of age and body mass index (BMI) were assessed. A quantitative region-of-interest (ROI)-based SNR/CNR analysis was also performed.ResultsDL VIBE yielded better image quality, fewer artifacts, and less noise than ST VIBE. DL-by-CE interactions were significant for image quality and artifacts. Interobserver agreement was moderate for image quality and artifacts but low for noise. Quantitative analysis showed no significant differences in estimated SNR or CNR between ST and DL VIBE before or after contrast administration (all <i>p</i> ≥ 0.35).ConclusionDL VIBE improves image quality and reduces artifacts, particularly in NC imaging.</p>","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"2841851261486041"},"PeriodicalIF":1.2,"publicationDate":"2026-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149011944","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}

{"title":"Absolute myocardial mass difference and ventriculo-arterial coupling in morphologically defined left ventricular non-compaction: A multiparametric cardiovascular magnetic resonance study.","authors":"Safiye Sanem Dereli Bulut, Sevde Nur Emir","doi":"10.1177/02841851261488325","DOIUrl":"https://doi.org/10.1177/02841851261488325","url":null,"abstract":"<p><p>BackgroundLeft ventricular non-compaction (LVNC) is increasingly recognized as a morphological phenotype rather than a distinct cardiomyopathy. Current cardiovascular magnetic resonance (CMR) criteria rely predominantly on static morphologic thresholds and may not adequately reflect dynamic myocardial adaptation.PurposeTo investigate whether absolute myocardial mass difference (AD) represents a marker of structural-functional remodeling and to assess its relationship with hemodynamic and flow-related parameters in morphologically defined LVNC.Material and MethodsIn this retrospective study, 99 patients fulfilling Petersen and Grothoff CMR criteria for LVNC and 66 frequency-matched controls underwent multiparametric 1.5-T CMR. Volumetric indices, left atrial volume, cine-derived functional parameters, and aortic phase-contrast MRI flow timing indices, including time-to-peak velocity (TPV), ejection time (ET), and TPV/ET ratio, were analyzed. AD was defined as the indexed difference between end-diastolic myocardial mass and cycle-averaged myocardial mass. Between-group comparisons, effect size analysis, correlation testing, and ROC analysis were performed.ResultsAD was significantly higher in LVNC patients than in controls (3.71 ± 2.43 vs. 2.03 ± 1.49 g/m²; <i>P</i> < 0.001) and demonstrated a large effect size (Cohen's <i>d</i> = 0.81). LVNC patients exhibited increased end-diastolic and end-systolic volume indices (both <i>P</i> < 0.001), preserved cardiac index, and altered systolic flow timing characteristics. AD correlated positively with left atrial volume (<i>r</i> = 0.39; <i>P</i> < 0.001) and cardiac index (<i>r</i> = 0.27; <i>P</i> = 0.007), whereas no significant association was observed with TPV/ET. ROC analysis demonstrated modest discriminatory performance (AUC = 0.71).ConclusionIn morphologically defined LVNC, AD is increased and associated with atrial remodeling and preserved hemodynamic adaptation. These findings suggest that AD may represent a marker of dynamic structural-functional remodeling rather than static trabecular excess. Incorporation of AD into multiparametric CMR assessment may improve phenotypic characterization and help distinguish compensated hypertrabecularization from clinically relevant myocardial disease.</p>","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"2841851261488325"},"PeriodicalIF":1.2,"publicationDate":"2026-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149011932","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}

{"title":"Clinical and angiographic predictors of recurrent hemoptysis following bronchial artery embolization: The impact of non-bronchial systemic arteries and pulmonary-bronchial anastomoses.","authors":"Emre Karacay, Busra Nur Bay Aslan, Nurullah Rencber, Nilufer Nas Abes, Ali Kamil Gurbet, Ibrahim Ilker Oz","doi":"10.1177/02841851261489275","DOIUrl":"https://doi.org/10.1177/02841851261489275","url":null,"abstract":"<p><p>BackgroundBronchial artery embolization (BAE) is the first-line treatment for hemoptysis with high success rates. However, recurrent hemoptysis remains a significant clinical problem. The role of non-bronchial systemic arteries (NBSAs) and pulmonary-bronchial arterial anastomoses in predicting recurrence remains incompletely understood.PurposeTo evaluate clinical and angiographic predictors of recurrent hemoptysis after BAE.Material and MethodsThis retrospective single-center study included 148 patients who underwent technically and clinically successful BAE for hemoptysis between 2022 and 2024. Univariate and multivariate logistic regression analyses were performed to identify independent predictors of recurrence. ROC analysis was used to evaluate the predictive value of hemoptysis volume.ResultsRecurrent hemoptysis occurred in 42 (28.4%) patients. Multivariate analysis identified NBSAs (odds ratio (OR) = 10.11, 95% confidence interval (CI) = 1.50-68.02; <i>P</i> = 0.017), pulmonary-bronchial arterial anastomoses (OR = 4.43, 95% CI = 1.53-12.85; <i>P</i> = 0.006), and tuberculosis etiology (OR = 6.81, 95% CI = 2.20-21.05; <i>P</i> < 0.001) as independent predictors. Hemoptysis volume showed limited predictive performance (AUC = 0.591; <i>P</i> = 0.039).ConclusionNBSAs and pulmonary-bronchial anastomoses are strong independent predictors of recurrent hemoptysis after BAE. Notably, this association persisted even when NBSAs were successfully embolized, suggesting a biological rather than technical basis for recurrence. Patients with complex vascular anatomy and tuberculosis require closer post-procedural surveillance and may benefit from more intensive follow-up strategies after embolization.</p>","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"2841851261489275"},"PeriodicalIF":1.2,"publicationDate":"2026-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149011935","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}

{"title":"Age as a pre-operative predictor of uterine, bladder, and intestinal invasion in cervical cancer.","authors":"Fahimeh Zeinalkhani, Peyman Kamali Hakim, Ali Sharifi, Amirmohammad Azizzadeh, Parnia Jochin, Fatemeh Mahdavi Sabet, Hadise Zeinalkhani","doi":"10.1177/02841851261486043","DOIUrl":"https://doi.org/10.1177/02841851261486043","url":null,"abstract":"<p><p>BackgroundAccurate staging of cervical cancer is essential for treatment planning, with Magnetic Resonance Imaging (MRI) being the modality of choice. Cervical cancer is suspected to have variations in its presentation and etiology depending on the age of patients.PurposeTo explore the association between patient age and specific findings on contrast-enhanced MRI in women with newly diagnosed cervical cancer.Material and MethodsThis study included 146 consecutive patients with pathologically confirmed cervical cancer who underwent 3.0T contrast-enhanced MRI for initial staging. MRI scans were evaluated for tumor size, parametrium, uterine, bladder, and intestinal invasion, among other features. Ordinal, binary, and multinomial logistic regression models were used to assess age as a predictor for MRI stage and specific invasive findings. Receiver Operating Characteristic (ROC) curve analysis was performed for significant findings.ResultsThe mean patient age was 49.1 ± 12.2 years. Age was a significant predictor of a higher MRI stage (OR: 1.029, p = 0.025). Increasing age emerged as a significant predictor for uterine invasion (OR: 1.050, 95% CI: 1.022-1.085, p = 0.002), an association that remained significant even after controlling for disease stage. Age predicted higher odds of bladder mucosal (OR: 1.052, p = 0.011) and non-mucosal intestinal invasion (OR: 1.038, p = 0.041). ROC identified an age cutoff of 45.5 for uterine invasion (AUC: 65.2%).ConclusionRadiologists should maintain a heightened index of suspicion for more extensive local invasion when interpreting cervical cancer staging MRIs in older women.</p>","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"2841851261486043"},"PeriodicalIF":1.2,"publicationDate":"2026-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148982159","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}

{"title":"Retrospective comparison of three commercial artificial intelligence algorithms for detection of intracranial hemorrhage (ICH) in the emergency radiology department.","authors":"Kristoffer Järlevi, Daniel Lindbom, Andreas Lindholm, Gustav Alvfeldt, Chikako Suzuki, Michael L Wilczek","doi":"10.1177/02841851261484026","DOIUrl":"https://doi.org/10.1177/02841851261484026","url":null,"abstract":"<p><p>BackgroundSeveral commercial artificial intelligence (Al) algorithms are available for detecting intracranial hemorrhage (ICH), but independent clinical validation remains limited.PurposeTo compare three commercially available Al algorithms for ICH detection on non- contrast head computed tomography (NCHCT).Material and MethodsIn this retrospective study, 4027 consecutive NCHCT examinations from a large emergency hospital in southwest Sweden were analyzed. Three Al algorithms were applied, with one vendor disclosing participation. Reports from two radiologists and all Al outputs were evaluated. Human-AI performance was assessed using an idealized logical OR model, assuming radiologists perfectly dismissed all false-positive Al flags to calculate system specificity. All positive or discrepant cases underwent expert manual review using two-tier consensus adjudication as the reference standard.ResultsOf 3902 evaluable examinations, 3517 were consistently negative by all readers. The remaining 385 cases underwent manual review, confirming ICH in 176 cases (4.5% prevalence) and excluding it in 209. Eight ICH cases missed by both radiologists were detected by at least one Al system. Aidoc performed best, with 90.3% sensitivity and 99.0% specificity. A simulated mathematical combination of Aidoc with a human reader increased sensitivity to 96.0% while maintaining 99.4% specificity (<i>P</i> < 0.001), comparable to two radiologists.ConclusionAl performance varied substantially, with only one system demonstrating clinically relevant accuracy. Combining Al with human interpretation improved ICH detection and shows promise for future clinical implementation.</p>","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"2841851261484026"},"PeriodicalIF":1.2,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148965925","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}

{"title":"Detection of split renal function with MRI: Arterial spin labeling combined with renal structure imaging in obstructive nephropathy.","authors":"Yuqing Cai, Lei Wang, Wenhao Guan, Lijie Zhang, Yang Dong, Xiancheng Li","doi":"10.1177/02841851261484038","DOIUrl":"https://doi.org/10.1177/02841851261484038","url":null,"abstract":"<p><p>BackgroundNon-invasive monitoring of split renal function (SRF) impairment in the context of urinary tract obstruction remains challenging. Renal scintigraphy (RS), the clinical standard, involves ionizing radiation, whereas magnetic resonance imaging (MRI)-based alternatives are underexplored.PurposeTo evaluate arterial spin-labeled (ASL) and structural MRI for SRF assessment in obstructive nephropathy.Material and MethodsConsecutive patients underwent 3.0-T MRI (ASL/T1-weighted). Kidneys (n = 92) were stratified by scintigraphy-derived glomerular filtration rate (RS-GFR) into normal renal function, mild to moderate renal impairment, severe impairment, or no function groups. Cortical renal blood flow (RBF), parenchymal thickness (RPT), and hydronephrosis width (HW) were measured. Group differences (ANOVA/Kruskal-Wallis) and correlations with RS-GFR (Pearson/Spearman) were analyzed. Receiver operating characteristic curves assessed diagnostic performance.ResultsRBF, RPT, and HW differed significantly among groups (<i>P</i> < 0.001), correlating strongly with RS-GFR (r = 0.767, 0.684, -0.589). They discriminated SRF subgroups (<i>P</i> < 0.001); RBF + RPT + HW achieved areas under the curve of 0.869 (normal vs. mild), 0.883 (mild vs. severe), and 0.994 (normal vs. severe).ConclusionASL-derived RBF and structural markers (RPT and HW) correlate robustly with RS-GFR, offering a feasible MRI-based, non-invasive approach for SRF monitoring.</p>","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"2841851261484038"},"PeriodicalIF":1.2,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148944041","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}

{"title":"Respiratory rate estimation by using realignment data from a 1-minute high-temporal-resolution MRI sequence: A feasibility study.","authors":"Leonie Zerweck, Uwe Klose, Ulrike Ernemann, Till-Karsten Hauser","doi":"10.1177/02841851261484876","DOIUrl":"https://doi.org/10.1177/02841851261484876","url":null,"abstract":"<p><p>BackgroundBreath-hold triggered functional magnetic resonance imaging (bh-fMRI) is a widely available, easily implementable and inexpensive method to quantify cerebrovascular reactivity. Estimation of patients' respiratory rate is relevant, as it might influence bh-fMRI data quality, but respiratory sensors integrated in the scanner table are not always available.PurposeTo propose an approach to estimate patients' respiratory rate using realignment data of a 1-min high-temporal-resolution cerebral MRI sequence.Material and MethodsIn a prospective study, 15 patients with Moyamoya angiopathy underwent a 1-min MRI sequence during routine clinical MRI. The respiratory rate was obtained by analyzing patients' head motion from image realignment data. To obtain robust results, the respiratory rate was calculated using a multi-method approach, incorporating power spectral density and fast Fourier transform and weighted data from multiparametric rigid body transformation. The respiratory rate detected from respiratory sensors integrated in the scanner table was used as reference. Bland-Altman analysis was performed and intra-class correlation coefficients (ICCs) were calculated to compare the respiratory rates.ResultsBland-Altman analysis revealed a mean bias of 0.5 breaths/min and limits of agreement (LoA) ranging from -5.3 to 4.4 breaths/min, with no outliers. The overall agreement between the respiratory rate calculated from realignment data and from scanner sensor data was excellent (ICC = 0.866, 95% confidence interval = 0.607-0.955; <i>P</i> < 0.001).ConclusionThe calculated mean bias and LoA appear to be clinically acceptable. Estimating respiratory rate from a 1-min high-temporal-resolution MRI sequence may be a feasible method when respiratory sensors integrated in the scanner are not available.</p>","PeriodicalId":7143,"journal":{"name":"Acta radiologica","volume":" ","pages":"2841851261484876"},"PeriodicalIF":1.2,"publicationDate":"2026-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148917894","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}