Polish Journal of Radiology最新文献

{"title":"Evaluation of imaging methods in cerebral toxoplasmosis.","authors":"Radosław Zawadzki,&nbsp;Stefan Modzelewski,&nbsp;Maciej Naumowicz,&nbsp;Aleksandra Monika Matyja,&nbsp;Agata Dominika Urbaniak,&nbsp;Joanna Zajkowska,&nbsp;Bożena Kubas","doi":"10.5114/pjr.2023.130981","DOIUrl":"https://doi.org/10.5114/pjr.2023.130981","url":null,"abstract":"<p><p>Cerebral toxoplasmosis is a parasitic disease resulting, in most cases, from a reactivation of a latent cyst with <i>Toxoplasma gondii</i>. The disease mainly affects immunosuppressed individuals, such as HIV (human immunodeficiency virus)-infected patients. Diagnosis is based on specialized antibody testing, clinical symptoms, neuroimaging methods, and histological examination. The gold standard for diagnosis is a brain biopsy, but more often the response to treatment seen in clinical symptoms and neuroimaging studies is sufficient. The imaging features support the diagnosis of cerebral toxoplasmosis and help assess the effectiveness of treatment.</p>","PeriodicalId":47128,"journal":{"name":"Polish Journal of Radiology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/fd/49/PJR-88-51347.PMC10493861.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10244483","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}

{"title":"Association between lung opacities and visceral fat in COVID-19 patients.","authors":"Michał Sosna,&nbsp;Agnieszka Młynarska,&nbsp;Bartłomiej Stasiów,&nbsp;Rafał Młynarski","doi":"10.5114/pjr.2023.125407","DOIUrl":"https://doi.org/10.5114/pjr.2023.125407","url":null,"abstract":"<p><strong>Purpose: </strong>To assess the relationship between the amount of the epigastric visceral fat area and the severity of pneumonia in the course of COVID-19 using chest computed tomography (CT) examinations.</p><p><strong>Material and methods: </strong>177 patients (54 female), with COVID-19 infection were included. A routine chest CT was performed to assess the severity of pneumonia. The affected lung tissue as well as semi-quantitative scales such as the Chest CT Score and Total Opacity Score were calculated using SyngoVia VB30A CT Pneumonia Analysis software. The epigastric region area of visceral fat (L1) was also determined.</p><p><strong>Results: </strong>The mean value of the visceral adipose tissue area was 196.23 ± 101.36 cm². The area of adipose tissue significantly correlated with the percentage of the affected lung tissue (<i>r</i> = 0.1476; <i>p</i> = 0.050), the Chest CT Score (<i>r</i> = 0.2086; <i>p</i> = 0.005), and the Total Opacity Score (<i>r</i> = 0.1744; <i>p</i> = 0.200). The mean area of adipose tissue in the age group ≥ 65 years was 216.13 ± 105.19 cm², while in the group < 65 years, it was 169.18 ± 89.69 cm². This difference was statistically significant (<i>p</i> = 0.002).</p><p><strong>Conclusions: </strong>The study showed a relationship between the area of visceral adipose tissue and the degree of lung inflammation in COVID-19 disease in patients under 65 years of age.</p>","PeriodicalId":47128,"journal":{"name":"Polish Journal of Radiology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/2b/e5/PJR-88-50199.PMC9995241.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9102558","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}

{"title":"Chest computed tomography of suspected COVID-19 pneumonia in the Emergency Department: comparative analysis between patients with different vaccination status.","authors":"Luca Alessandro Carbonaro,&nbsp;Francesca Braga,&nbsp;Pietro Gemma,&nbsp;Eleonora Carlicchi,&nbsp;Annamaria Pata,&nbsp;Martina Conca,&nbsp;Francesco Rizzetto,&nbsp;Angelo Vanzulli","doi":"10.5114/pjr.2023.125010","DOIUrl":"https://doi.org/10.5114/pjr.2023.125010","url":null,"abstract":"<p><strong>Purpose: </strong>To identify differences in chest computed tomography (CT) of the symptomatic coronavirus disease 2019 (COVID-19) population according to the patients' severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccination status (non-vaccinated, vaccinated with incomplete or complete vaccination cycle).</p><p><strong>Material and methods: </strong>CT examinations performed in the Emergency Department (ED) in May-November 2021 for suspected COVID-19 pneumonia with a positive SARS-CoV-2 test were retrospectively included. Personal data were compared for vaccination status. One 13-year experienced radiologist and two 4th-year radiology residents independently evaluated chest CT scans according to CO-RADS and ACR COVID classifications. In possible COVID-19 pneumonia cases, defined as CO-RADS 3 to 5 (ACR indeterminate and typical) by each reader, high involvement CT score (≥ 25%) and CT patterns (presence of ground glass opacities, consolidations, crazy paving areas) were compared for vaccination status.</p><p><strong>Results: </strong>184 patients with known vaccination status were included in the analysis: 111 non-vaccinated (60%) for SARS-CoV-2 infection, 21 (11%) with an incomplete vaccination cycle, and 52 (28%) with a complete vaccination cycle (6 different vaccine types). Multivariate logistic regression showed that the only factor predicting the absence of pneumonia (CO-RADS 1 and ACR negative cases) for the 3 readers was a complete vaccination cycle (OR = 12.8-13.1compared to non-vaccinated patients, <i>p</i> ≤ 0.032). Neither CT score nor CT patterns of possible COVID-19 pneumonia showed any statistically significant correlation with vaccination status for the 3 readers.</p><p><strong>Conclusions: </strong>Symptomatic SARS-CoV-2-infected patients with a complete vaccination cycle had much higher odds of showing a negative CT chest examination in ED compared to non-vaccinated patients. Neither CT involvement nor CT patterns of interstitial pneumonia showed differences across different vaccination status.</p>","PeriodicalId":47128,"journal":{"name":"Polish Journal of Radiology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/bf/ad/PJR-88-50130.PMC9995244.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9102559","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}

{"title":"Excessive brain atrophy in patients with severe aortic stenosis.","authors":"Jakub Chrostowski,&nbsp;Marcin Majos,&nbsp;Andrzej Walczak,&nbsp;Agata Majos","doi":"10.5114/pjr.2023.129088","DOIUrl":"https://doi.org/10.5114/pjr.2023.129088","url":null,"abstract":"<p><strong>Purpose: </strong>To assess the prevalence of the neuroradiological indices of brain atrophy in patients with severe aortic valve stenosis (AS) in magnetic resonance imaging (MRI) with particular emphasis on the assessment of atrophy areas typical of cerebral small vessel disease (CSVD).</p><p><strong>Material and methods: </strong>The group of 34 patients (age 60-90 years, 17 women and 17 men) with severe AS and 50 healthy controls (age 61-85 years, 29 women and 21 men) underwent MRI brain examinations, which were analysed for the neuroradiological indices of brain atrophy.</p><p><strong>Results: </strong>A slight but statistically significant age difference was found between the study and control groups - about 3 years on average (<i>p</i> = 0.040). Differences between total brain volumes in both the groups did not show statistical significance. In a comparative analysis of the main brain compartments, a statistically significant difference was found only in the volumetry of cerebral hemispheres for both the groups: mean volume of cerebral hemispheres in patients with severe AS was 884.46 cm³, while it was 17 cm³ bigger in the volunteer group, reaching 901.80 cm³ on average (<i>p</i> = 0.043). Comparison of the volumetry of the other major and minor regions and structures according to the clinical and anatomical division revealed statistically non-significant differences. No statistically significant relationships were observed concerning structures correlated with CSVD.</p><p><strong>Conclusions: </strong>Neuroradiological indices of the brain atrophy do not provide an unequivocal distinction in patients with severe AS. Most observations imply that brain atrophy in patients with severe AS is primarily a consequence of physiological ageing of the brain.</p>","PeriodicalId":47128,"journal":{"name":"Polish Journal of Radiology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/10/26/PJR-88-50973.PMC10317006.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9799146","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}

{"title":"Primary synovial sarcoma on MRI - a case series and review of the literature.","authors":"Maya Sedaghat,&nbsp;Sam Sedaghat","doi":"10.5114/pjr.2023.130048","DOIUrl":"https://doi.org/10.5114/pjr.2023.130048","url":null,"abstract":"<p><strong>Purpose: </strong>Simple MRI features are mandatory to facilitate the diagnostics of synovial sarcomas, especially for radiolo-gists outside multidisciplinary sarcoma centres. In this case-series and review, we investigate the main appearance of synovial sarcoma on MRI.</p><p><strong>Material and methods: </strong>Fifteen histologically proven primary synovial sarcomas who underwent MRI at 2 different sarcoma centres were included in this case series. Patients and their primary synovial sarcomas were examined for age, localization, mean tumour size (in mm), histological grade (G - according to the Fédération Nationale des Centres de Lutte Contre Le Cancer [FNCLCC]), configuration, T2 signal intensity, presence/absence of \"triple sign\", heterogeneity/homogeneity, borders (well-defined or infiltrative), and intensity of contrast enhancement on MRI. Additionally, a comprehensive literature review to identify observational studies, reviews, and case-reports assessing MRI features of primary synovial sarcoma was performed.</p><p><strong>Results: </strong>The mean age of the patients was 47.6 years (SD: 17.2). The mean size of primary synovial sarcoma was 59.3 mm (SD: 42). Primary synovial sarcomas were significantly most often multilobulated (<i>n</i> = 12, <i>p</i> < 0.01), heterogeneous (<i>n</i> = 10), and infiltrative (<i>n</i> = 9). Additionally, 3 other primary synovial sarcomas showed the following configurations: ovoid/nodular (<i>n</i> = 2) and fascicular (<i>n</i> = 1). Ovoid/nodular synovial sarcomas were solely depicted as homogeneous with well-defined borders. All tumours showed T2 hyperintense signal and presented with marked contrast enhancement.</p><p><strong>Conclusions: </strong>Primary synovial sarcomas are mainly multilobulated, heterogeneous, and infiltrative tumours. In minor cases, ovoid/nodular or fascicular configurations occur. Knowing the main appearance of synovial sarcoma can help facilitate the diagnostics of primary synovial sarcomas.</p>","PeriodicalId":47128,"journal":{"name":"Polish Journal of Radiology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/f1/62/PJR-88-51147.PMC10415809.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9999499","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}

{"title":"Determinants of perivascular adipose tissue stranding as a novel imaging marker and its relation to inflammatory biomarker high-sensitivity C-reactive protein.","authors":"Hamidreza Pouraliakbar,&nbsp;Abolfazl Abouie,&nbsp;Elham Ziaeifar,&nbsp;Nima Rakhshankhah,&nbsp;Abbas Arjmand Shabestari,&nbsp;Parham Rabiei,&nbsp;Bahram Mohebbi,&nbsp;Mohammad Javad Alemzade-Ansari,&nbsp;Nejat Mahdieh","doi":"10.5114/pjr.2023.126084","DOIUrl":"https://doi.org/10.5114/pjr.2023.126084","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to examine the relationship of perivascular adipose tissue (PVAT) stranding in coronary computed tomography angiography (CCTA) with high-sensitivity C-reactive protein (hsCRP) and the determinants of PVAT stranding in coronary artery disease (CAD) patients.</p><p><strong>Material and methods: </strong>This retrospective cross-sectional study was done by collecting data from CAD patients who were referred to Rajaie Cardiovascular Centre between January 2018 and September 2020, with CCTA and hsCRP test 72 hours apart from the CCTA. PVAT stranding was defined as irregular obscuration of PVAT adjacent to the coronary arteries. An attempt was made to find a correlation between included variables and PVAT stranding by comparing them between 2 groups: patients with and without PVAT stranding.</p><p><strong>Results: </strong>From 92 patients, 31 participants had PVAT stranding, and statistically significant higher levels of hsCRP were detected in them (p = 0.007). We demonstrated significantly higher prevalence of history of hyperlipidaemia (OR = 3.83, p = 0.029), high-risk plaque features (OR = 11.80, p = 0.015), and obstructive coronary luminal stenosis (OR = 3.25, p = 0.025) in patients with PVAT stranding. Also, significantly higher PVAT attenuation was detected in patients with PVAT stranding (p < 0.001) independently from mean attenuation of epicardial fat.</p><p><strong>Conclusion: </strong>PVAT stranding could be used as a novel non-invasive marker in CCTA of CAD patients. More studies focusing on patient outcomes are required to better evaluate the reliability and prognostic value of this marker.</p>","PeriodicalId":47128,"journal":{"name":"Polish Journal of Radiology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/3e/03/PJR-88-50403.PMC10086606.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9305511","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}

{"title":"Prediction microvascular invasion of hepatocellular carcinoma based on tumour margin enhancing pattern in multiphase computed tomography images.","authors":"Natthaphong Nimitrungtawee,&nbsp;Nakarin Inmutto,&nbsp;Amonlaya Amantakul,&nbsp;Attaporn Jantarangkoon","doi":"10.5114/pjr.2023.127578","DOIUrl":"https://doi.org/10.5114/pjr.2023.127578","url":null,"abstract":"<p><strong>Purpose: </strong>The presence of microvascular invasion of hepatocellular carcinoma has a significantly decreased outcome following hepatectomy or liver transplantation. Currently, it is still based on histological examination. Identification of microvascular invasion by using pre-operative imaging is important for the decision-making of surgeons and interventional radiologists. Aim of the study was to predict the microvascular invasion of hepatocellular carcinoma based on tumour margin enhancement of pre-operative multiphase computed tomography (CT) images.</p><p><strong>Material and methods: </strong>Fifty-three patients with hepatocellular carcinoma, who underwent pre-operative multiphase CT scans, were included in this study. Tumour margin enhancing patterns were analysed in the late arterial phase, portovenous phase, and delay phase. The CT features including peritumoral enhancement, arterial rim-enhancement, presence of daughter nodules, complete capsule enhancement in portovenous/delay phase, and nodular capsule enhancement in portovenous/delay phase were reviewed with calculations for sensitivity and specificity. Univariate analysis and multivariate analysis were used to identify predictive features for microvascular invasion (MVI).</p><p><strong>Results: </strong>In the late arterial phase, peritumoral enhancement or the presence of daughter nodules were not predictors for MVI. Nodular capsule enhancement in the portovenous phase and delay phase were independent predictors for MVI with odds ratios of 29.25 and 33.09, respectively. The sensitivity and specificity for incomplete/nodular capsule enhancement in the portovenous phase were 69.23% and 96.86%, respectively. The sensitivity and specificity for incomplete/nodular capsule enhancement in the delay phase were 71.79% and 96.86%, respectively.</p><p><strong>Conclusion: </strong>Nodular capsule enhancement in the portovenous phase or delay phase was a good predictor for MVI.</p>","PeriodicalId":47128,"journal":{"name":"Polish Journal of Radiology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/7f/9b/PJR-88-50705.PMC10280366.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9765635","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}

{"title":"Shear wave elastography: usefulness in chronic kidney disease.","authors":"Theertha Kuttancheri,&nbsp;Kavitha Krishnan,&nbsp;Sudha Kiran Das,&nbsp;Manjunath Sanjeeva Shetty","doi":"10.5114/pjr.2023.128694","DOIUrl":"https://doi.org/10.5114/pjr.2023.128694","url":null,"abstract":"<p><strong>Purpose: </strong>Chronic kidney disease (CKD) is recognized as a major worldwide health problem. For all CKD, intra-renal fibrosis is a final common pathway that can be correlated with disease severity. Tissue stiffness can be measured non-invasively using shear wave elastography. This study evaluates the use of Young's modulus derived by SWE as a biomarker that can distinguish normal from diseased kidneys. Also, Young's modulus was correlated with Doppler findings and estimated glomerular filtration rate (eGFR).</p><p><strong>Material and methods: </strong>This prospective study was performed in 2 phases, in which initially 50 CKD patients and 50 controls were studied to arrive at a median Young's modulus value in both the groups. In the later phase, a cross-sectional comparative study was conducted on 58 diabetic and 56 non-diabetic patients with SWE and renal Doppler, and the findings were correlated in various stages of CKD.</p><p><strong>Results: </strong>Using Young's modulus, the renal cortex elasticity of CKD patients was shown to be considerably reduced as compared to normal kidneys. There was significant correlation between Young's modulus, eGFR, and renal resistive index. Young's modulus values did not show significant differences between diabetic and non-diabetic groups, revealing its inability to arrive at the aetiopathogenesis of CKD.</p><p><strong>Conclusions: </strong>Correlation of renal tissue Young's modulus with eGFR suggests that SWE may be used as an indicator of renal tissue injuries in CKD patients. SWE can never replace the gold standard biopsy, but it can be used for staging of CKD. Even though SWE cannot predict the aetiopathogenesis of CKD, it may be a low-cost way to provide additional diagnostic information in CKD.</p>","PeriodicalId":47128,"journal":{"name":"Polish Journal of Radiology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/71/f8/PJR-88-50854.PMC10317009.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10178198","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}

{"title":"Computed tomography virtual oesophagography for the grading of oesophageal varices in cirrhotic liver disease patients with upper gastrointestinal endoscopic examination as the gold standard: a diagnostic validation study.","authors":"Ravinandan Kumar,&nbsp;Khanak K Nandolia,&nbsp;Pankaj Sharma,&nbsp;Ajeet Singh Bhadoria,&nbsp;Udit Chauhan,&nbsp;Itish Patnaik,&nbsp;Sudhir Saxena","doi":"10.5114/pjr.2023.126459","DOIUrl":"https://doi.org/10.5114/pjr.2023.126459","url":null,"abstract":"<p><strong>Purpose: </strong>Virtual endoscopy is a postprocessing method using three-dimensional computed tomography (CT), which produces views of the inner surfaces of the human body like those produced by fibreoptic endoscopy. To evaluate and categorise patients who require medical or endoscopic band ligation to prevent oesophageal variceal bleed, a less invasive, less expensive, better tolerated, and more sensitive modality is required, as well as to reduce the use of invasive procedures in the follow-up of patients who do not require endoscopic variceal band ligation.</p><p><strong>Material and methods: </strong>A cross-sectional study was conducted in the Department of Radiodiagnosis in association with the Department of Gastroenterology. The study was conducted over a period of 18 months from July 2020 to January 2022. The sample size was calculated as 62 patients. Patients were recruited on the basis of inclusion and exclusion criteria after giving informed consent. CT virtual endoscopy was performed through a dedicated protocol. Classification of variceal grading was done independently by a radiologist and endoscopist who were blinded to each other's findings.</p><p><strong>Results: </strong>The diagnostic performance of oesophageal varices detection by CT virtual oesophagography was good, with sensitivity: 86%, specificity: 90%, PPV: 98%, NPV: 56%, and diagnostic accuracy: 87%. There was substantial agreement between the 2 methods, and this agreement was statistically significant (Cohen's k = 0.616, <i>p</i> ≤ 0.001).</p><p><strong>Conclusions: </strong>Based on our findings, we conclude that the current study has the potential to change the way chronic liver disease is managed, as well as generate similar medical research endeavours. A multicentric study with a large number of patients is needed to improve the experience with this modality.</p>","PeriodicalId":47128,"journal":{"name":"Polish Journal of Radiology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/6a/08/PJR-88-50510.PMC10207316.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9527537","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}

{"title":"Auto-segmentation of head and neck tumors in positron emission tomography images using non-local means and morphological frameworks.","authors":"Sahel Heydarheydari,&nbsp;Mohammad Javad Tahmasebi Birgani,&nbsp;Seyed Masoud Rezaeijo","doi":"10.5114/pjr.2023.130815","DOIUrl":"https://doi.org/10.5114/pjr.2023.130815","url":null,"abstract":"<p><strong>Purpose: </strong>Accurately segmenting head and neck cancer (HNC) tumors in medical images is crucial for effective treatment planning. However, current methods for HNC segmentation are limited in their accuracy and efficiency. The present study aimed to design a model for segmenting HNC tumors in three-dimensional (3D) positron emission tomography (PET) images using Non-Local Means (NLM) and morphological operations.</p><p><strong>Material and methods: </strong>The proposed model was tested using data from the HECKTOR challenge public dataset, which included 408 patient images with HNC tumors. NLM was utilized for image noise reduction and preservation of critical image information. Following pre-processing, morphological operations were used to assess the similarity of intensity and edge information within the images. The Dice score, Intersection Over Union (IoU), and accuracy were used to evaluate the manual and predicted segmentation results.</p><p><strong>Results: </strong>The proposed model achieved an average Dice score of 81.47 ± 3.15, IoU of 80 ± 4.5, and accuracy of 94.03 ± 4.44, demonstrating its effectiveness in segmenting HNC tumors in PET images.</p><p><strong>Conclusions: </strong>The proposed algorithm provides the capability to produce patient-specific tumor segmentation without manual interaction, addressing the limitations of current methods for HNC segmentation. The model has the potential to improve treatment planning and aid in the development of personalized medicine. Additionally, this model can be extended to effectively segment other organs from limited annotated medical images.</p>","PeriodicalId":47128,"journal":{"name":"Polish Journal of Radiology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/20/8c/PJR-88-51317.PMC10493858.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10295021","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}