Acta radiologica open最新文献

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Correlation between diffusion-weighted image-derived parameters and dynamic contrast-enhanced magnetic resonance imaging-derived parameters in the orofacial region. 口面部扩散加权成像衍生参数与动态对比增强磁共振成像衍生参数之间的相关性。
Acta radiologica open Pub Date : 2024-03-28 eCollection Date: 2024-03-01 DOI: 10.1177/20584601241244777
Toru Chikui, Masahiro Ohga, Yukiko Kami, Osamu Togao, Shintaro Kawano, Tamotsu Kiyoshima, Kazunori Yoshiura
{"title":"Correlation between diffusion-weighted image-derived parameters and dynamic contrast-enhanced magnetic resonance imaging-derived parameters in the orofacial region.","authors":"Toru Chikui, Masahiro Ohga, Yukiko Kami, Osamu Togao, Shintaro Kawano, Tamotsu Kiyoshima, Kazunori Yoshiura","doi":"10.1177/20584601241244777","DOIUrl":"10.1177/20584601241244777","url":null,"abstract":"<p><strong>Background: </strong>Diffusion-weighted imaging (DWI) and dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) are widely used in the orofacial region. Furthermore, quantitative analyses have proven useful. However, a few reports have described the correlation between DWI-derived parameters and DCE-MRI-derived parameters, and the results have been controversial.</p><p><strong>Purpose: </strong>To evaluate the correlation among parameters obtained by DWI and DCE-MRI and to compare them between benign and malignant lesions.</p><p><strong>Material and methods: </strong>Fifty orofacial lesions were analysed. The apparent diffusion coefficient (ADC), true diffusion coefficient (D), pseudodiffusion coefficient (D*) and perfusion fraction (f) were estimated by DWI. For DCE-MRI, TK model analysis was performed to estimate physiological parameters, for example, the influx forward volume transfer constant into the extracellular-extravascular space (EES) (K<sup>trans</sup>) and fractional volumes of EES and plasma components (ve and vp).</p><p><strong>Results: </strong>Both ADC and D showed a moderate positive correlation with ve (ρ = 0.640 and 0.645, respectively). K<sup>trans</sup> showed a marginally weak correlation with f (ρ = 0.296), while vp was not correlated with f or D*; therefore, IVIM perfusion-related parameters and TK model perfusion-related parameters were not straightforward. Both D and ve yielded high diagnostic power between benign lesions and malignant tumours with areas under the curve (AUCs) of 0.830 and 0.782, respectively.</p><p><strong>Conclusion: </strong>Both D and ve were reliable parameters that were useful for the differential diagnosis. In addition, the true diffusion coefficient (D) was affected by the fractional volume of EES.</p>","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":"13 3","pages":"20584601241244777"},"PeriodicalIF":0.0,"publicationDate":"2024-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10979534/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140337789","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
Intense prostate-specific membrane antigen receptor expression in coronary artery pypass graft scar tissue: A potential molecular imaging pitfall. 冠状动脉旁路移植瘢痕组织中前列腺特异性膜抗原受体的强烈表达:潜在的分子成像陷阱
IF 0.9
Acta radiologica open Pub Date : 2024-03-28 eCollection Date: 2024-02-01 DOI: 10.1177/20584601241240318
Akram Al-Ibraheem, Ahmed Saad Abdlkadir, Nabeela Al-Hajaj, Aysar Khalaf, Samer Salah
{"title":"Intense prostate-specific membrane antigen receptor expression in coronary artery pypass graft scar tissue: A potential molecular imaging pitfall.","authors":"Akram Al-Ibraheem, Ahmed Saad Abdlkadir, Nabeela Al-Hajaj, Aysar Khalaf, Samer Salah","doi":"10.1177/20584601241240318","DOIUrl":"10.1177/20584601241240318","url":null,"abstract":"<p><p><sup>68</sup>Gallium-PSMA positron emission tomography/computer tomography has been utilized recently for the diagnosis and staging of prostate cancer. PSMA is a transmembrane protein that is expressed not only in the prostate gland but also in other tissues. While some pitfalls have been addressed, there are still uncertainties. Herein, we report a 79-year-old male with prostate cancer who underwent a PSMA scan after coronary artery bypass graft surgery, revealing disease progression and PSMA-avid foci at the surgical stitch sites. This report discusses the immunohistochemical and molecular imaging mechanisms underlying PSMA expression in surgical scar tissues, providing critical insights for optimizing radiologic reporting in such situations.</p>","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":"13 2","pages":"20584601241240318"},"PeriodicalIF":0.9,"publicationDate":"2024-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10976503/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140338563","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
A multi-institutional assessment of low-dose protocols in chest computed tomography: Dose and image quality. 胸部计算机断层扫描低剂量方案的多机构评估:剂量和图像质量
IF 0.9
Acta radiologica open Pub Date : 2024-01-30 eCollection Date: 2024-01-01 DOI: 10.1177/20584601241228220
Elena Tonkopi, Mercy Afadzi Tetteh, Catherine Gunn, Haseem Ashraf, Sigrid Lia Rusten, Perkhah Safi, Nora Suu Tinsoe, Kylie Colford, Olivia Ouellet, Salma Naimi, Safora Johansen
{"title":"A multi-institutional assessment of low-dose protocols in chest computed tomography: Dose and image quality.","authors":"Elena Tonkopi, Mercy Afadzi Tetteh, Catherine Gunn, Haseem Ashraf, Sigrid Lia Rusten, Perkhah Safi, Nora Suu Tinsoe, Kylie Colford, Olivia Ouellet, Salma Naimi, Safora Johansen","doi":"10.1177/20584601241228220","DOIUrl":"10.1177/20584601241228220","url":null,"abstract":"<p><strong>Background: </strong>Low-dose CT (LDCT) chest protocols have widespread clinical applications for many indications; as a result, there is a need for protocol assessment prior to standardization. Dalhousie University and Oslo Metropolitan University have a formally established cooperative relationship.</p><p><strong>Purpose: </strong>The purpose is to assess radiation dose and image quality for LDCT chest protocols in seven different hospital locations in Norway and Canada.</p><p><strong>Material and methods: </strong>Retrospective dosimetry data, volumetric CT dose index (CTDI<sub>vol</sub>), and dose length product (DLP) from 240 average-sized patients as well as CT protocol parameters were included in the survey. Effective dose (ED) and size-specific dose estimate (SSDE) were calculated for each examination. For a quantitative image quality analysis, noise, CT number, and signal-to-noise ratio (SNR) were determined for three regions in the chest. The contrast-to-noise ratio (CNR) was calculated for lung parenchyma in comparison to the subcutaneous fat. Differences in dose and image quality were evaluated by a single-factor ANOVA test. A two-sample <i>t</i>-test was performed to determine differences in means between individual scanners.</p><p><strong>Results: </strong>The ANOVA test revealed significant differences (<i>p</i> < .05) in dose values for all scanners, including identical scanner models. Statistically significant differences (<i>p</i> < .05) were determined in mean values of the SNR distributions between the scanners in all three measured regions in the chest, as well as the CNR values.</p><p><strong>Conclusion: </strong>The observed variations in dose and image quality measurements, even within the same hospitals and between identical scanner models, indicate a potential for protocol optimization in the involved hospitals in both countries.</p>","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":"13 1","pages":"20584601241228220"},"PeriodicalIF":0.9,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10829498/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139673759","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
Evaluation of virtual monochromatic imaging with dual-energy computed tomography of small liver metastases from malignant abdominal tumours: Quantitative and qualitative analyses 腹部恶性肿瘤小肝脏转移的双能计算机断层扫描虚拟单色成像评估:定量和定性分析
Acta radiologica open Pub Date : 2023-12-01 DOI: 10.1177/20584601231220324
Hiroaki Okada, Nozomu Matsunaga, Takahiro Yamamoto, Masato Yamauchi, Kojiro Suzuki
{"title":"Evaluation of virtual monochromatic imaging with dual-energy computed tomography of small liver metastases from malignant abdominal tumours: Quantitative and qualitative analyses","authors":"Hiroaki Okada, Nozomu Matsunaga, Takahiro Yamamoto, Masato Yamauchi, Kojiro Suzuki","doi":"10.1177/20584601231220324","DOIUrl":"https://doi.org/10.1177/20584601231220324","url":null,"abstract":"Background The assessment of small metastatic liver tumours using dual-energy computed tomography (DECT) has not been fully established. Purpose To assess the effect of low-keV virtual monochromatic imaging (VMI) with non-contrast and contrast-enhanced DECT on the qualitative and quantitative image parameters of small liver metastases. Material and methods Two radiologists retrospectively evaluated 92 metastatic liver tumours (5–20 mm) in 32 patients. Non-contrast and contrast-enhanced VMI were reconstructed at seven energy levels (40–100 keV) with 10-keV intervals. Lesion boundary, lesion delineation, image noise, and overall image quality were evaluated using the visual analogue scale. A high subjective score indicates good overall image quality, clear nodal boundaries and delineation, and less noticeable image noise. Subjective scores were compared using the Kruskal–Wallis test. A quantitative analysis involving the signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) was performed. Results The lesion boundary was highest at 40 keV and significantly improved during the non-contrast portal venous phase compared to that at higher keV (p < .005). The lesion delineation score was significantly higher at 40 keV and tended to decrease at higher keV. Image noise and overall image quality were rated low at low keV; however, those at 80, 90, and 100 keV were rated the highest (p < .005). The CNR and SNR were highest for non-contrast CT at 100 keV. During the portal venous phase, no significant differences were observed in CNR and SNR at each keV. Conclusion Low-keV imaging using non-contrast and contrast-enhanced DECT is useful for delineating small hepatic metastatic tumours.","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":"27 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138624662","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
Utility of hyperdense whirl sign for the diagnosis of gallbladder torsion. 高密度旋流征在胆囊扭转诊断中的应用。
Acta radiologica open Pub Date : 2023-11-29 eCollection Date: 2023-11-01 DOI: 10.1177/20584601231218994
Osamu Sato, Tomoya Kotani, Taisei Kanayama, Bunta Tokuda, Kei Yamada
{"title":"Utility of hyperdense whirl sign for the diagnosis of gallbladder torsion.","authors":"Osamu Sato, Tomoya Kotani, Taisei Kanayama, Bunta Tokuda, Kei Yamada","doi":"10.1177/20584601231218994","DOIUrl":"10.1177/20584601231218994","url":null,"abstract":"<p><p>The purpose of this report was to evaluate the usefulness of hyperdense whirl sign on unenhanced computed tomography (CT) for diagnosing gallbladder torsion. The CT scans of seven patients with gallbladder torsion were independently reviewed by two board-certified radiologists for locating the high-density core with twisting between the gallbladder neck and liver bed, termed hyperdense whirl sign. The sign was observed in six cases. The detection of a hyperdense whirl sign on unenhanced CT appears useful for diagnosing gallbladder torsion.</p>","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":"12 11","pages":"20584601231218994"},"PeriodicalIF":0.0,"publicationDate":"2023-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10687929/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138479530","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
Mapping gender and geographic diversity in artificial intelligence research: Editor representation in leading computer science journals. 绘制人工智能研究中的性别和地理多样性:主要计算机科学期刊的编辑代表性。
Acta radiologica open Pub Date : 2023-11-28 eCollection Date: 2023-10-01 DOI: 10.1177/20584601231213740
Felix Busch, Sarah Keller, Christopher Rueger, Avan Kader, Katharina Ziegeler, Keno K Bressem, Lisa C Adams
{"title":"Mapping gender and geographic diversity in artificial intelligence research: Editor representation in leading computer science journals.","authors":"Felix Busch, Sarah Keller, Christopher Rueger, Avan Kader, Katharina Ziegeler, Keno K Bressem, Lisa C Adams","doi":"10.1177/20584601231213740","DOIUrl":"10.1177/20584601231213740","url":null,"abstract":"<p><strong>Background: </strong>The growing role of artificial intelligence (AI) in healthcare, particularly radiology, requires its unbiased and fair development and implementation, starting with the constitution of the scientific community.</p><p><strong>Purpose: </strong>To examine the gender and country distribution among academic editors in leading computer science and AI journals.</p><p><strong>Material and methods: </strong>This cross-sectional study analyzed the gender and country distribution among editors-in-chief, senior, and associate editors in all 75 Q1 computer science and AI journals in the Clarivate Journal Citations Report and SCImago Journal Ranking 2022. Gender was determined using an open-source algorithm (Gender Guesser™), selecting the gender with the highest calibrated probability.</p><p><strong>Result: </strong>Among 4,948 editorial board members, women were underrepresented in all positions (editors-in-chief/senior editors/associate editors: 14%/18%/17%). The proportion of women correlated positively with the SCImago Journal Rank indicator (ρ = 0.329; <i>p</i> = .004). The U.S., the U.K., and China comprised 50% of editors, while Australia, Finland, Estonia, Denmark, the Netherlands, the U.K., Switzerland, and Slovenia had the highest women editor representation per million women population.</p><p><strong>Conclusion: </strong>Our results highlight gender and geographic disparities on leading computer science and AI journal editorial boards, with women being underrepresented in all positions and a disproportional relationship between the Global North and South.</p>","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":"12 10","pages":"20584601231213740"},"PeriodicalIF":0.0,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10685787/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138464698","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
Assessment of articular cartilage of ankle joint in stable and unstable unilateral weber type-B/SER-type ankle fractures shortly after trauma using T2 relaxation time. 使用T2放松时间评估稳定和不稳定的单侧weber型B/SER型踝关节骨折创伤后不久的踝关节关节软骨。
Acta radiologica open Pub Date : 2023-09-29 eCollection Date: 2023-09-01 DOI: 10.1177/20584601231202033
Sami Lehtovirta, Victor Casula, Marianne Haapea, Simo Nortunen, Sannamari Lepojärvi, Harri Pakarinen, Miika T Nieminen, Eveliina Lammentausta, Jaakko Niinimäki
{"title":"Assessment of articular cartilage of ankle joint in stable and unstable unilateral weber type-B/SER-type ankle fractures shortly after trauma using T2 relaxation time.","authors":"Sami Lehtovirta,&nbsp;Victor Casula,&nbsp;Marianne Haapea,&nbsp;Simo Nortunen,&nbsp;Sannamari Lepojärvi,&nbsp;Harri Pakarinen,&nbsp;Miika T Nieminen,&nbsp;Eveliina Lammentausta,&nbsp;Jaakko Niinimäki","doi":"10.1177/20584601231202033","DOIUrl":"https://doi.org/10.1177/20584601231202033","url":null,"abstract":"<p><strong>Background: </strong>Early detection of post-traumatic cartilage damage in the ankle joint in magnetic resonance images can be difficult due to disturbances to structures usually appearing over time.</p><p><strong>Purpose: </strong>To study the articular cartilage of unilateral Weber type-B/SER-type ankle fractures shortly post-trauma using T2 relaxation time.</p><p><strong>Material and methods: </strong>Fifty one fractured ankles were gathered from consecutively screened patients, compiled initially for RCT studies, and treated at Oulu University Hospital and classified as stable (<i>n</i> = 28) and unstable fractures (<i>n</i> = 23) based on external-rotation stress test: medial clear space of ≥5 mm was interpreted as unstable. A control group of healthy young individuals (<i>n</i> = 19) was also gathered. All ankles were imaged on average 9 (range: 1 to 25) days after injury on a 3.0T MRI unit for T2 relaxation time assessment, and the cartilage was divided into sub-regions for comparison.</p><p><strong>Results: </strong>Control group displayed significantly higher T2 values in tibial cartilage compared to stable (six out of nine regions, <i>p</i>-values = .003-.043) and unstable (six out of nine regions, <i>p</i>-values = .001-.037) ankle fractures. No differences were detected in talar cartilage. Also, no differences were observed between stable and unstable fractures in tibial or talar cartilage.</p><p><strong>Conclusions: </strong>Lower T2 relaxation times of tibial cartilage in fractured ankles suggest intact extra cellular matrix (ECM) of the cartilage. Severity of the ankle fracture, measured by ankle stability, does not seem to increase ECM degradation immediately after trauma.</p>","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":"12 9","pages":"20584601231202033"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10540593/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41175631","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
Accuracy of radiographic measurements of fracture-induced deformity in the distal radius. 桡骨远端骨折引起畸形的放射学测量准确性。
Acta radiologica open Pub Date : 2023-09-25 eCollection Date: 2023-09-01 DOI: 10.1177/20584601231205986
Janni Jensen, Ole Graumann, Oke Gerke, Trine Torfing, Helle Precht, Benjamin S Rasmussen, Hans B Tromborg
{"title":"Accuracy of radiographic measurements of fracture-induced deformity in the distal radius.","authors":"Janni Jensen,&nbsp;Ole Graumann,&nbsp;Oke Gerke,&nbsp;Trine Torfing,&nbsp;Helle Precht,&nbsp;Benjamin S Rasmussen,&nbsp;Hans B Tromborg","doi":"10.1177/20584601231205986","DOIUrl":"https://doi.org/10.1177/20584601231205986","url":null,"abstract":"<p><strong>Background: </strong>Management of the distal radius fracture (DRF) is to some extent based on radiographic characterization of fracture displacement. It remains unclear, however, if the measurements used to quantify displacement are accurate.</p><p><strong>Purpose: </strong>To quantify accuracy of two radiographic measurements: dorsal/volar tilt and fracture compression, measured indirectly as ulnar variance (UV), using radiostereometric analyses (RSA) as reference standard.</p><p><strong>Material and methods: </strong>Twenty-one fresh frozen non-fractured human cadaveric forearms (right = 11, left = 10) were thawed and eligible for inclusion. The forearms were mounted on a custom made platform that allowed for controlled forearm rotation, and they underwent two rounds of imaging (both rounds consisted of RSA and radiographs). In round one, the non-fractured forearms were radiographed. In round two, artificial DRF´s with compression and dorsal angulation were created and imaging procedures repeated. Change in tilt and UV between the non-fractured and later fractured forearms was defined as fracture-induced deformity. Deformity was measured radiographically and additionally calculated using RSA. Bland Altman analyses were used to estimate agreement between radiographically measured, and RSA calculated, fracture-induced deformity.</p><p><strong>Results: </strong>Our results indicated that radiographs underestimate the amount of fracture-induced deformity. Mean measured differences (bias) in dorsal tilt deformity between radiographs and RSA were -2.5° for both observers. The corresponding values for UV were -1.4 mm and -1.5 mm.</p><p><strong>Conclusion: </strong>Quantifying fracture-induced deformity on radiographs underestimated the actual deformity when compared to RSA calculated deformity. These findings suggest that clinicians, at least in part, base fracture management and potentially corrective surgery on inaccurate measurements.</p>","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":"12 9","pages":"20584601231205986"},"PeriodicalIF":0.0,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/70/df/10.1177_20584601231205986.PMC10521277.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41166762","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
Can virtual non-contrast imaging replace true non-contrast imaging in multiphase scanning of the neck region? 在颈部多相扫描中,虚拟非对比度成像能否取代真正的非对比度图像?
Acta radiologica open Pub Date : 2023-09-25 eCollection Date: 2023-08-01 DOI: 10.1177/20584601231205159
Zaid Al-Difaie, Max Hmc Scheepers, Nicole D Bouvy, Sanne Engelen, Bas Havekes, Alida A Postma
{"title":"Can virtual non-contrast imaging replace true non-contrast imaging in multiphase scanning of the neck region?","authors":"Zaid Al-Difaie,&nbsp;Max Hmc Scheepers,&nbsp;Nicole D Bouvy,&nbsp;Sanne Engelen,&nbsp;Bas Havekes,&nbsp;Alida A Postma","doi":"10.1177/20584601231205159","DOIUrl":"10.1177/20584601231205159","url":null,"abstract":"<p><strong>Background: </strong>Dual-energy computed tomography (DECT) is an advanced imaging method that enables reconstruction of virtual non-contrast (VNC) images from a contrast-enhanced acquisition. This has the potential to reduce radiation exposure by eliminating the need for a true non-contrast (TNC) phase.</p><p><strong>Purpose: </strong>The purpose is to evaluate the feasibility of VNC images in the neck region.</p><p><strong>Materials and methods: </strong>A total of 100 patients underwent a DECT scan as part of diagnostic workup of primary hyperparathyroidism. VNC images were reconstructed from 30 s (arterial) and 50 s (venous) post-contrast scans. Regions of interest (ROIs) were placed in thyroid tissue, lymph node, carotid artery, jugular vein, fat, and sternocleidomastoid muscle. Mean densities of all anatomical structures were compared between VNC and TNC images.</p><p><strong>Results: </strong>For all anatomical structures except the thyroid gland, the difference in mean density between TNC and VNC images was less than 15 HU. The mean difference in density between TNC and VNC images of the thyroid was 53.2 HU (95% CI 46.8; 59.6, <i>p</i> = <0.001).</p><p><strong>Conclusion: </strong>This study demonstrated an acceptable agreement in density between true non-contrast and virtual non-contrast images for most anatomical structures in the neck region. Therefore, VNC images may have the potential to replace TNC images in the neck. However, due to significant differences in CT density of thyroid tissue, true non-contrast imaging cannot be directly substituted by virtual non-contrast imaging when examining the thyroid and its surrounding tissue.</p>","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":"12 9","pages":"20584601231205159"},"PeriodicalIF":0.0,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10521284/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41170489","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
The T2-FLAIR mismatch sign in glioblastoma, isocitrate dehydrogenase wild-type A case report. 胶质母细胞瘤T2-FLAIR不匹配征象,异柠檬酸脱氢酶野生型A例报告。
Acta radiologica open Pub Date : 2023-06-01 DOI: 10.1177/20584601231184565
Shunsuke Nishimura, Koji Yamashita, Osamu Togao, Kazufumi Kikuchi, Daisuke Kuga, Hidetaka Yamamoto, Koji Yoshimoto, Kousei Ishigami
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