Acta radiologica open最新文献

{"title":"MRI diffusion-weighted imaging detects a fresh portal vein thrombus as a high intensity lesion in a patient with a liver transplant: A case report.","authors":"Yasuyoshi Kuroiwa, Kazunori Kusumoto, Keita Shimata, Atsushi Yamashita, Taizo Hibi, Yujiro Asada, Takuroh Imamura","doi":"10.1177/20584601211069557","DOIUrl":"10.1177/20584601211069557","url":null,"abstract":"<p><p>Portal vein thrombosis is one of the most serious complications after liver transplantation. It is important to determine the age of the thrombus for management of portal vein thrombosis. We present a case report of histologically confirmed heterogenous fresh portal vein thrombus which was depicted heterogenous high signal intensity on magnetic resonance diffusion weighted imaging. The sequence may be a useful imaging tool for detecting fresh thrombus components in the portal vein thrombosis.</p>","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":"10 12","pages":"20584601211069557"},"PeriodicalIF":0.9,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/b1/16/10.1177_20584601211069557.PMC8725224.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39791932","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":"Diagnostic performance of digital breast tomosynthesis for predicting response to neoadjuvant systemic therapy in breast cancer patients: A comparison with magnetic resonance imaging, ultrasound, and full-field digital mammography.","authors":"Ryusuke Murakami,&nbsp;Hitomi Tani,&nbsp;Shinichiro Kumita,&nbsp;Nachiko Uchiyama","doi":"10.1177/20584601211063746","DOIUrl":"https://doi.org/10.1177/20584601211063746","url":null,"abstract":"<p><strong>Background: </strong>The goals of neoadjuvant systemic therapy (NST) are to reduce tumor volume and to provide a prognostic indicator in assessing treatment response. Digital breast tomosynthesis (DBT) was developed and has increased interest in clinical settings due to its higher sensitivity for breast cancer detection compared to full-field digital mammography (FFDM).</p><p><strong>Purpose: </strong>To evaluate the accuracy of DBT in assessing response to NST compared to FFDM, ultrasound (US), and magnetic resonance imaging (MRI) in breast cancer patients.</p><p><strong>Material and methods: </strong>In this retrospective study, 95 stages II-III breast cancer patients undergoing NST and subsequent surgeries were enrolled. After NST, the longest diameter of residual tumor measured by DBT, FFDM, US, and MRI was compared with pathology. Agreements and correlations of tumor size were assessed, and the diagnostic performance for predicting pathologic complete response (pCR) was evaluated.</p><p><strong>Results: </strong>Mean residual tumor size after NST was 19.9 mm for DBT, 18.7 mm for FFDM, 16.0 mm for US, and 18.4 mm for MRI, compared with 17.9 mm on pathology. DBT and MRI correlated better with pathology than that of FFDM and US. The ICC values were 0.85, 0.87, 0.74, and 0.77, respectively. Twenty-five patients (26.3%) achieved pCR after NST. For predicting pCR, area under the receiver operating characteristic (ROC) curve for DBT, FFDM, US, and MRI were 0.79, 0.66, 0.68, and 0.77, respectively.</p><p><strong>Conclusion: </strong>DBT has good correlation with histopathology for measuring residual tumor size after NST. DBT was comparable to MRI in assessing tumor response after completion of NST.</p>","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":"10 12","pages":"20584601211063746"},"PeriodicalIF":0.0,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/82/2c/10.1177_20584601211063746.PMC8725236.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39791464","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":"Diffusion tension imaging is a good tool for assessing patients with dementia and behavioral problems and discriminating them from other dementia patients.","authors":"Mala Naik,&nbsp;Morteza Esmaeili,&nbsp;Owen Thomas,&nbsp;Jonn T Geitung","doi":"10.1177/20584601211066467","DOIUrl":"https://doi.org/10.1177/20584601211066467","url":null,"abstract":"<p><strong>Background: </strong>Dementia is one of the leading public health concerns as the world's population ages. Although Alzheimer's disease (AD) is the most common dementia diagnosis among older patients, some patients have additional behavioral symptoms. It is therefore important to provide an exact diagnosis, both to provide the best possible treatment for patients and to facilitate better understanding.</p><p><strong>Purpose: </strong>To investigate whether magnetic resonance imaging (MRI) with fractional anisotropy (FA) can accurately find patients with behavioral symptoms within a group of AD patients.</p><p><strong>Material and methods: </strong>Forty-five patients from the geriatric outpatient clinic were recruited consecutively to form a group of patients with AD and behavioral symptoms (AD + BS) and a control group of 50 patients with established AD. All patients had a full assessment for dementia to establish the diagnosis according to ICD-10. MRI included 3D anatomical recordings for morphometric measurements, DTI for fiber tracking, and quantitative assessment of regional white matter integrity. The DTI analyses included computing of the diffusion tensor and its derived FA index.</p><p><strong>Results: </strong>We found a significant difference in FA values between the patient groups' frontal lobes. The FA was greater in the study group in both left (0.39 vs 0.09, <i>p</i> < 0.05) and right (0.40 vs 0.16, <i>p</i> < 0.05) frontal lobes.</p><p><strong>Conclusion: </strong>MRI with FA will find damage in frontal tracts and may be used as a diagnostic tool and be considered a robust tool for the recognizing different types of dementia in the future.</p>","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":"10 12","pages":"20584601211066467"},"PeriodicalIF":0.0,"publicationDate":"2021-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8689627/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39872161","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":"Intra- and inter-rater reliability of compressed breast thickness, applied force, and pressure distribution in screening mammography.","authors":"Martina Voigt,&nbsp;Anetta Bolejko,&nbsp;Magnus Dustler","doi":"10.1177/20584601211062078","DOIUrl":"https://doi.org/10.1177/20584601211062078","url":null,"abstract":"<p><strong>Background: </strong>Ensuring equivalent and reproducible breast compression between mammographic screening rounds is important for the diagnostic performance of mammography, yet the extent to which screening mammography positioning and compression is reproducible for the individual woman is unknown.</p><p><strong>Purpose: </strong>To investigate the intra- and inter-rater reliability of breast compression in screening mammography.</p><p><strong>Materials and methods: </strong>Eleven breast-healthy women participated in the study. Two experienced radiographers independently positioned and compressed the breasts of each participant in two projections-right craniocaudal and left mediolateral oblique-and at two time points. The spatial pressure distribution on the compressed breast was measured using a pressure sensor matrix. Applied force, compressed breast thickness, force in field of view, contact area, mean pressure, and center of mass (anterio-posterior and mediolateral axes) were measured. The reliabilities of the measures between the time points for each radiographer (intra-rater reliability) and between the radiographers (inter-rater reliability) were analyzed using the intraclass correlation coefficient (ICC).</p><p><strong>Results: </strong>Intra- and inter-rater reliabilities from both projections demonstrated good to excellent ICCs (≥0.82) for compressed breast thickness, contact area, and anterio-posterior center of mass. The other measures produced ICCs that varied from poor (≤0.42) to excellent (≥0.93) between time points and between radiographers.</p><p><strong>Conclusion: </strong>Intra- and inter-rater reliability of breast compression was consistently high for <i>compressed breast thickness</i>, <i>contact area</i>, and <i>anterio-posterior center of mass</i> but low for <i>mediolateral center of mass</i> and <i>applied force</i>. Further research is needed to establish objective and clinically useful parameters for the standardization of breast compression.</p>","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":"10 12","pages":"20584601211062078"},"PeriodicalIF":0.0,"publicationDate":"2021-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8819760/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39780983","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":"A case of primary aortic sarcoma with tumor infarction after stent graft placement.","authors":"Hiroki Nakamura,&nbsp;Akihiko Kanki,&nbsp;Hiroyuki Watanabe,&nbsp;Kentarou Ono,&nbsp;Noriaki Kuwada,&nbsp;Shinsuke Saisho,&nbsp;Hirotake Nishimura,&nbsp;Akira Yamamoto,&nbsp;Tsutomu Tamada","doi":"10.1177/20584601211063360","DOIUrl":"https://doi.org/10.1177/20584601211063360","url":null,"abstract":"<p><p>Primary aortic sarcoma is a very rare disease, and most primary aortic tumors are malignant mesenchymal tumors. We present the case of a 62-year-old man with sudden epigastric and back pain. Contrast-enhanced computed tomography (CT) revealed a mass lesion about 33.8 mm in diameter, in contact with the left side of the abdominal aorta. Impending rupture of an abdominal aortic aneurysm was suspected, so cardiovascular surgery for stent graft placement was performed the same day. Symptoms immediately improved and CT at 3 months postoperatively showed a marked decrease in lesion size, but the lesion subsequently grew again. Fluorodeoxyglucose (FDG)-positron emission tomography/CT was performed due to the possibility of malignant solid tumor, revealing markedly increased FDG accumulation (maximum standardized uptake value, 36.95) in the mass lesion. Primary aortic sarcoma was diagnosed from thoracoscopic biopsy. Here, we report a primary aortic sarcoma that shrank due to tumor infarction after stent graft placement, followed by tumor regrowth.</p>","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":"10 11","pages":"20584601211063360"},"PeriodicalIF":0.0,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/ea/0e/10.1177_20584601211063360.PMC8664319.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39832017","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":"Muscle volume evaluation using 3DCT for congenital clubfoot.","authors":"Masataka Kakihana,&nbsp;Yuki Tochigi,&nbsp;Satoru Ozeki,&nbsp;Tetsuya Jinno","doi":"10.1177/20584601211062084","DOIUrl":"https://doi.org/10.1177/20584601211062084","url":null,"abstract":"<p><strong>Background: </strong>In congenital clubfoot, the lower leg is very thin and the calf muscles are hypoplasic. However, there are few studies reporting real muscle volume.</p><p><strong>Purpose: </strong>The purpose of this study is to assay the muscle volume in congenital clubfoot using 3DCT and to quantify the degree of the hypoplasia.</p><p><strong>Material and methods: </strong>From January 2015 to December 2016, nine consecutive patients, seven male and two female, with unilateral congenital clubfeet were recruited for CT scans. Axial transverse sectional CT scans were acquired from the delineation of the fibular head to the tibial plafond. From the data, we rendered the entire muscle in 3D for muscle volume assay, and further segmented the posterior musculature for comparison between the normal and affected sides.</p><p><strong>Results: </strong>The whole muscle volume on the normal side was 291.23 cm³ (181.23-593.49) and that on the affected side was 225.08 cm³ (120.71-429.08), for an affected side to normal side ratio of 0.79 (0.72-0.9), which was significantly smaller (<i>p <</i> .01). Posterior muscle volume on the normal side was 175.81 cm³ (103.72-376.32) and that on the affected side was 106.52 cm³ (58.3-188.39). The ratio of posterior muscle to whole muscle on the normal side was 0.62 (0.46-0.75), and that on the affected side was 0.48 (0.4-0.55), such that the affected side was significantly smaller (<i>p <</i> .01).</p><p><strong>Conclusion: </strong>This study contributes quantitative data supporting the longstanding observations that the posterior calf muscles are significantly smaller on the affected side compared to the normal side in congenital clubfoot, and further underscores the importance of the extending the excursion of these muscles.</p>","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":"10 11","pages":"20584601211062084"},"PeriodicalIF":0.0,"publicationDate":"2021-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/73/01/10.1177_20584601211062084.PMC8646796.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39817098","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":"MR arthrography of the shoulder; correlation with arthroscopy.","authors":"Janni Jensen,&nbsp;Maja T Kristensen,&nbsp;Lene Bak,&nbsp;Søren S Kristensen,&nbsp;Ole Graumann","doi":"10.1177/20584601211062059","DOIUrl":"https://doi.org/10.1177/20584601211062059","url":null,"abstract":"<p><strong>Background: </strong>Shoulder dislocation is a common injury, particularly in the younger population. Common long-term sequelae include pain, recurrence, and shoulder arthritis. Immediate and correct diagnosis following shoulder dislocation is key to achieving optimum outcomes. Although magnetic resonance arthrography (MRA) is frequently used for diagnosing shoulder instabilities, arthroscopy is still considered the gold standard.</p><p><strong>Purpose: </strong>This study aims to compare the diagnostic value of arthroscopy and MRA of the shoulder joint.</p><p><strong>Materials and methods: </strong>This retrospective study estimates the sensitivity and specificity of MRA of the shoulder. Data from patients who had undergone shoulder MRA and subsequent arthroscopy during a 5-year period were retrospectively collected. Sensitivity and specificity were calculated using the arthroscopic findings as the gold standard. Moreover, diagnostic accuracy was estimated using McNemar's test.</p><p><strong>Results: </strong>In total, 205 cases were included from which 372 pathological findings were uncovered during the arthroscopic procedures as opposed to 360 findings diagnosed from the MRA images. The glenoid labral tear was the most common finding reported by MRA and arthroscopy. For the detection of glenoid labral tears on MRA, the sensitivity was 0.955 but with eight missed lesions; the specificity was 0.679. Capsular tears, rotator cuff tears, and cartilage lesions proved the most difficult to correctly diagnose using MRA with sensitivities of 0.2, 0.346, and 0.366, respectively.</p><p><strong>Conclusions: </strong>With a sensitivity of 95%, MRA is a valuable diagnostic tool for assessing shoulder instabilities, particularly when diagnosing labral lesions, including bony and soft-tissue Bankart lesions. Sensitivities and specificities for other glenohumeral lesions are less convincing, however.</p>","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":"10 11","pages":"20584601211062059"},"PeriodicalIF":0.0,"publicationDate":"2021-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/70/21/10.1177_20584601211062059.PMC8646798.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39817097","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":"How to read biparametric MRI in men with a clinical suspicious of prostate cancer: Pictorial review for beginners with public access to imaging, clinical and histopathological database.","authors":"Ivan Jambor, Alberto Martini, Ugo G Falagario, Otto Ettala, Pekka Taimen, Juha Knaapila, Kari T Syvänen, Aida Steiner, Janne Verho, Ileana M Perez, Harri Merisaari, Paula Vainio, Tarja Lamminen, Jani Saunavaara, Giuseppe Carrieri, Peter J Boström, Hannu J Aronen","doi":"10.1177/20584601211060707","DOIUrl":"10.1177/20584601211060707","url":null,"abstract":"<p><p>Prostate Magnetic Resonance Imaging (MRI) is increasingly being used in men with a clinical suspicion of prostate cancer (PCa). Performing prostate MRI without the use of an intravenous contrast (IV) agent in men with a clinical suspicion of PCa can lead to reduced MRI scan time. Enabling a large array of different medical providers (from mid-level to specialized radiologists) to evaluate and potentially report prostate MRI in men with a clinical suspicion of PCa with a high accuracy could be one way to enable wide adoption of prostate MRI in men with a clinical suspicion of PCa. The aim of this pictorial review is to provide an insight into acquisition, quality control and reporting of prostate MRI performed without IV contrast agent in men with a clinical suspicion of PCa, aimed specifically at radiologists starting reporting prostate MRI, urologists, urology/radiology residents and mid-level medical providers without experience in reporting prostate MRI. Free public access (http://petiv.utu.fi/improd/and http://petiv.utu.fi/multiimprod/) to complete datasets of 161 and 338 men is provided. The imaging datasets are accompanied by clinical, laboratory and histopathological findings. Several topics are simplified in order to provide a solid base for the development of skills needed for an unsupervised review and potential reporting of prostate MRI in men with a clinical suspicion of PCa. The current review represents the first step towards enabling a large array of different medical providers to review and report accurately prostate MRI performed without IV contrast agent in men with a clinical suspicion of PCa.</p>","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":"10 11","pages":"20584601211060707"},"PeriodicalIF":0.0,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/55/5d/10.1177_20584601211060707.PMC8638086.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39784225","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":"Magnetic resonance imaging-guided biopsies in children.","authors":"Mika Hirvonen,&nbsp;Juha-Jaakko Sinikumpu,&nbsp;Osmo Tervonen,&nbsp;Roberto Blanco Sequeiros","doi":"10.1177/20584601211053846","DOIUrl":"https://doi.org/10.1177/20584601211053846","url":null,"abstract":"<p><strong>Background: </strong>Magnetic resonance imaging (MRI) is used far less as an imaging-guided method for percutaneous biopsies than computed tomography (CT) and ultrasound (US), despite its imaging benefits, particularly in children.</p><p><strong>Purpose: </strong>To evaluate the feasibility, accuracy and safety of MRI-guided biopsies in paediatric patient population.</p><p><strong>Material and methods: </strong>The retrospective study included 57 consecutive paediatric patients (<18 years old). A percutaneous core needle biopsy (PCNB) or trephine biopsy was performed in 53 cases, and an additional fine-needle aspiration biopsy (FNAB) in 26 cases. In 4 cases, a stand-alone FNAB was taken. Biopsies were performed with 0.23 T open and 1.5 T closed MRI scanners. Statistical methods used for confidence intervals and <i>p</i>-values were Wilson score method and chi-square test.</p><p><strong>Results: </strong>The overall diagnostic accuracy of histologic biopsy was 0.94, with sensitivity 0.82, specificity 1.00, positive predictive value (PPV) 1.00 and negative predictive value (NPV) 0.92. In histological bone biopsies, diagnostic accuracy was 0.96, with sensitivity 0.86, specificity 1.00, PPV 1.00 and NPV 0.94. The FNAB sample diagnosis was associated with the histological diagnosis in 79% of cases. There were no major primary complications and only a few late complications. After biopsy, 83% of the children were ambulatory in 6 h. Anti-inflammatory drugs and paracetamol provided satisfactory pain relief in 96% of the patients after biopsy. Most outpatients (71%) were discharged from hospital either on the same day or 1 day later.</p><p><strong>Conclusion: </strong>MRI is a technically feasible, accurate and safe guidance tool for performing percutaneous biopsies in children.</p>","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":"10 11","pages":"20584601211053846"},"PeriodicalIF":0.0,"publicationDate":"2021-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/de/9b/10.1177_20584601211053846.PMC8638078.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39784223","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":"Improved visualization of the chorda tympani nerve using ultra-high-resolution computed tomography.","authors":"Masahiro Fujiwara,&nbsp;Yoshiyuki Watanabe,&nbsp;Nobuo Kashiwagi,&nbsp;Yumi Ohta,&nbsp;Takashi Sato,&nbsp;Megumi Nishigaki,&nbsp;Noriyuki Tomiyama","doi":"10.1177/20584601211061444","DOIUrl":"https://doi.org/10.1177/20584601211061444","url":null,"abstract":"<p><strong>Background: </strong>Recognition of the anatomical course of the chorda tympani nerve (CTN) is important for preventing iatrogenic injuries during middle-ear surgery.</p><p><strong>Purpose: </strong>This study aims to compare visualization of the CTN using two computed tomography (CT) methods: conventional high-resolution CT (C-HRCT) and ultra-high-resolution CT (U-HRCT).</p><p><strong>Materials and methods: </strong>We performed a retrospective visual assessment of 59 CTNs in normal temporal bones of 54 consecutive patients who underwent both C-HRCT and U-HRCT. After dividing CTN into three anatomical segments (posterior canaliculus, tympanic segment, and anterior canaliculus), two neuroradiologists scored the visualizations on a four-point scale.</p><p><strong>Results: </strong>On C-HRCT, the visual scores of the posterior canaliculus, tympanic segment, and anterior canaliculus were 3.5 ± 0.7, 1.6 ± 0.6, and 3.1 ± 0.7, respectively. The respective values were significantly higher in all segments on U-HRCT: 3.9 ± 0.2, 2.4 ± 0.6, 3.5 ± 0.6 (<i>p</i> < 0.01). Although the difference in scores between methods was greatest for the tympanic segment, the visual score on U-HRCT was lower for the tympanic segment than for the anterior and posterior segments (<i>p</i> < 0.01).</p><p><strong>Conclusion: </strong>Ultra-high-resolution CT provides superior visualization of the CTN, especially the tympanic segment.</p>","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":"10 11","pages":"20584601211061444"},"PeriodicalIF":0.0,"publicationDate":"2021-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/52/76/10.1177_20584601211061444.PMC8637724.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39784226","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}