Abdominal Radiology最新文献

{"title":"Acalculous cholecystitis- an imaging and therapeutic update.","authors":"Matthew A Morgan, Daniel M DePietro, Debra S Whorms, Austin R Pantel, Dhakshinamoorthy Ganeshan, Inessa A Goldman, Julie Yang, Rachita Khot","doi":"10.1007/s00261-024-04691-0","DOIUrl":"https://doi.org/10.1007/s00261-024-04691-0","url":null,"abstract":"<p><p>In this review, we highlight current understanding of the pathogenesis of acalculous cholecystitis, as well as its key imaging and clinical features. We also review what happens after a diagnosis and outline current interventional methods.</p>","PeriodicalId":7126,"journal":{"name":"Abdominal Radiology","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142827201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Percutaneous image-guided mesenteric biopsy: how we do it in a high-volume training center.","authors":"Benjamin S Strnad, William D Middleton, Meghan G Lubner","doi":"10.1007/s00261-024-04662-5","DOIUrl":"https://doi.org/10.1007/s00261-024-04662-5","url":null,"abstract":"<p><p>Lesions in the mesentery are unique from other potential biopsy targets in the abdomen or pelvis for several reasons. Mesenteric lesions are among the deepest in the abdomen and are often surrounded by or adjacent to small bowel or colon. Mesenteric vasculature is often crowded, and traversing the mesentery often involves crossing multiple vascular planes. Mesenteric lesions and the structures surrounding them within the peritoneal cavity are often highly mobile. All these features can be daunting to any radiologist asked to perform a mesenteric biopsy. We provide a comprehensive overview and guide to percutaneous mesenteric biopsy informed by available literature and experience at two high volume teaching centers. Topics covered include the pitfalls of using prior imaging to determine whether mesenteric biopsy is possible, techniques specific to US or CT-guidance and complications including hemorrhage and bowel injury.</p>","PeriodicalId":7126,"journal":{"name":"Abdominal Radiology","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142827202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"LI-RADS in 2024: recent updates, planned refinements, and future directions.","authors":"Andrea Siobhan Kierans, Kathryn J Fowler, Victoria Chernyak","doi":"10.1007/s00261-024-04730-w","DOIUrl":"https://doi.org/10.1007/s00261-024-04730-w","url":null,"abstract":"<p><p>Initially released in 2011, liver imaging reporting and data (LI-RADS) CT/MRI diagnostic algorithm categorizes hepatic observations on an ordinal scale based on the probability of hepatocellular carcinoma, malignancy, or benignity, and guides reproducible interpretation, clear communication, and standardized terminology for liver imaging. LI-RADS has significantly expanded in scope in the past decade, with the inclusion of algorithms that address screening and surveillance, diagnosis with contrast enhanced ultrasound (CEUS), and treatment response assessment with both CEUS and CT/MRI. LI-RADS algorithms undergo periodic refinements based on accumulating scientific evidence, user feedback, and technological advancements. This manuscript discusses recent LI-RADS algorithm refinements, planned updates, with a focus on LI-RADS CT/MRI diagnostic algorithm, and future goals.</p>","PeriodicalId":7126,"journal":{"name":"Abdominal Radiology","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142817010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Feasibility of iodine concentration parameter and extracellular volume fraction derived from dual-energy CT for distinguishing type I and type II epithelial ovarian carcinoma.","authors":"Qingling Song, Ye Li, Tingfan Wu, Wenjun Hu, Yijun Liu, Ailian Liu","doi":"10.1007/s00261-024-04752-4","DOIUrl":"https://doi.org/10.1007/s00261-024-04752-4","url":null,"abstract":"<p><strong>Objectives: </strong>To investigate the feasibility of using the iodine concentration (IC) parameter and extracellular volume (ECV) fraction derived from dual-energy CT for distinguishing between type I and type II epithelial ovarian carcinoma (EOC).</p><p><strong>Methods: </strong>This study retrospectively included 172 patients with EOC preoperatively underwent dual-energy CT scans. Patients were grouped as type I and type II EOC according to postoperatively pathologic results. Normalized IC (NIC, %) values from arterial-phase (AP), venous-phase (VP) and delay-phase (DP) were measured by two observers. ECV fraction (%) was calculated by DP-NIC and hematocrit. Intra-observer correlation coefficient (ICC) was used to assess the agreement between measurements made by two observers. The differences of imaging parameters between the two groups were compared. Logistic regression was used to select independent predictive factors and establish combined parameter. Receiver operating characteristic curve was used to analyze performance of all parameters.</p><p><strong>Results: </strong>The ICCs for all parameters exceeded 0.75. All parameters in type II EOC were all significantly higher than those in type I EOC (all P < 0.05). VP-NIC exhibited the highest Area under the curve (AUC) of 0.804, along with 80.39% sensitivity and 71.43% specificity. VP-NIC was identified as the independent factor. The sensitivity and specificity of ECV fraction were 78.43% and 71.43%, respectively. The combined parameter consisting of AP-NIC, VP-NIC, DP-NIC, and ECV fraction yielded an AUC of 0.823, with sensitivity of 76.47% and specificity of 77.14%. The sensitivity of the combined parameter was significantly higher than that of AP-NIC (P = 0.049).</p><p><strong>Conclusion: </strong>It is valuable for dual-energy CT IC-based parameters and ECV fraction in preoperatively identifying type I and type II EOC.</p><p><strong>Critical relevance statement: </strong>Dual-energy CT-normalized iodine concentration and extracellular volume fraction achieved satisfactory discriminative efficacy, distinguishing between type I and type II epithelial ovarian carcinoma.</p>","PeriodicalId":7126,"journal":{"name":"Abdominal Radiology","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Intravesical BCG therapy: implications for radiologists in abdominal imaging follow-up.","authors":"Manisha Naganatanahalli, Sohrab Afshari Mirak, Vijayanadh Ojili, Nikhil H Ramaiya, Sree Harsha Tirumani","doi":"10.1007/s00261-024-04737-3","DOIUrl":"https://doi.org/10.1007/s00261-024-04737-3","url":null,"abstract":"<p><p>This study reviews the intravesical Bacillus Calmette-Guérin therapy for treatment of non-muscle invasive bladder cancer including mechanism of action, dosing considerations, treatment success and surveillance. A variety of common and uncommon adverse effects are reviewed with a focus on abdominal -pelvic complications stratified into genitourinary and systemic categories. The complications included more common entities such as chemical cystitis, which has been reported to be present in approximately 35% of the patients to more serious but rare complications such as vascular involvement with only a few reported cases in the literature. For each complication, the pertinent imaging findings and available examples are provided. Additionally, it is important to consider the potential for recurrence or progression of bladder cancer in this patient population, with reported rates of 38.2% and 9.8%, respectively. This underscores the necessity of a thorough differential diagnosis when interpreting imaging findings related to these complications.</p>","PeriodicalId":7126,"journal":{"name":"Abdominal Radiology","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prediction of mucinous adenocarcinoma in colorectal cancer with mucinous components detected in preoperative biopsy diagnosis.","authors":"Tong Ling, Zhichao Zuo, Mingwei Huang, Liucheng Wu, Jie Ma, Xiaoliang Huang, Weizhong Tang","doi":"10.1007/s00261-024-04743-5","DOIUrl":"https://doi.org/10.1007/s00261-024-04743-5","url":null,"abstract":"<p><strong>Objectives: </strong>Endoscopic biopsy diagnosis for the preoperative assessment of mucinous components in patients with colorectal cancer is limited. This study investigated a radiomics model and established an explainable prediction model by using machine learning to differentiate between adenocarcinoma with mucinous components and mucinous adenocarcinoma.</p><p><strong>Methods: </strong>The derivation cohort included 312 patients with colorectal cancer with mucinous components detected during preoperative endoscopic biopsy diagnosis. These patients were randomly divided into training and validation sets in a 7:3 ratio. Radiomics features were extracted, followed by feature engineering, to create a radiomic score (radscore). Subsequently, 24 features, including the radscore, clinical data, and serological characteristics, were used to develop machine learning models by using nine different machine learning algorithms. The SHapley Additive exPlanation (SHAP) method was employed to elucidate the workings of the machine learning models and visualize individual variable predictions.</p><p><strong>Results: </strong>The radiomics model achieved an area under the curve (AUC) of 0.810. The random forest model outperformed the other models and had the highest AUC of 0.832; thus, this model was defined as the hybrid model. The clinical model, which was built using clinical data and serological characteristics, had an AUC of 0.732, whereas the radiomics model achieved an AUC of 0.810. SHAP model interpretation revealed that among the 14 features with non-zero SHAP values, the radscore and clinical T stage had notably higher values.</p><p><strong>Conclusion: </strong>This interpretable predictive model effectively differentiates between adenocarcinoma with mucinous components and mucinous adenocarcinoma in patients with colorectal cancer, thereby facilitating informed treatment decisions for individuals in whom mucinous components are identified during preoperative biopsy diagnosis.</p>","PeriodicalId":7126,"journal":{"name":"Abdominal Radiology","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluating deep learning and radiologist performance in volumetric prostate cancer analysis with biparametric MRI and histopathologically mapped slides.","authors":"Enis C Yilmaz, Stephanie A Harmon, Rosina T Lis, Omer Tarik Esengur, David G Gelikman, Marcial Garmendia-Cedillos, Maria J Merino, Bradford J Wood, Krishnan Patel, Deborah E Citrin, Sandeep Gurram, Peter L Choyke, Peter A Pinto, Baris Turkbey","doi":"10.1007/s00261-024-04734-6","DOIUrl":"https://doi.org/10.1007/s00261-024-04734-6","url":null,"abstract":"","PeriodicalId":7126,"journal":{"name":"Abdominal Radiology","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142805959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CT and MRI characteristics of inflammatory pseudotumor-like follicular dendritic cell sarcoma of the spleen: a report of 11 patients with pathological correlation.","authors":"Chang Liu, Yun-Yun Li, Xian-Di Zhu, Xue-Lian Xiang","doi":"10.1007/s00261-024-04736-4","DOIUrl":"https://doi.org/10.1007/s00261-024-04736-4","url":null,"abstract":"<p><strong>Objective: </strong>This study aimed to outline the computed tomography (CT) and magnetic resonance imaging (MRI) characteristics of inflammatory pseudotumor-like follicular dendritic cell sarcoma (IPT-like FDCS) in the spleen and to link these imaging features with histopathological findings.</p><p><strong>Materials and methods: </strong>A retrospective analysis was conducted on 11 patients (3 males, 8 females; mean age, 63.3 ± 9.66 years; age range, 44-76 years; median age, 62 years) with histopathologically confirmed inflammatory pseudotumor-like follicular dendritic cell sarcoma of the spleen (IPT-like FDCS). The study encompassed a comprehensive review of initial clinical manifestations, macroscopic pathological alterations, along with histopathological and corresponding immunohistochemical findings. CT (n = 10) and MRI (n = 8) characteristics were meticulously assessed by two experienced radiologists, who evaluated parameters including lesion number, size, shape, margin definition, capsular integrity, attenuation, signal intensity, presence of hemosiderin deposition, and patterns of contrast enhancement.</p><p><strong>Results: </strong>In this study, all eleven patients (11/11; 100%) presented with solitary inflammatory pseudotumor-like follicular dendritic cell sarcoma (IPT-like FDCS). The majority of these cases were incidentally detected during routine physical examinations, while one case was revealed through abdominal CT following a decline in platelet count post-radiation and chemotherapy for prostate cancer. The splenic lesions were predominantly oval in shape (10/11; 91%), with a single case exhibiting a lobulated appearance (1/11; 9%). The largest lesion diameter was 18 cm, with diameters ranging from 3.3 to 18 cm, averaged 6.5 cm, and a median diameter of 5.0 cm. On plain CT images, the lesions were primarily observed as hypodense with poorly defined margins. On contrast-enhanced CT, all lesions (10/10; 100%) promptly became sharply demarcated in the arterial phase, encircled by a perceptible, relatively hypodense capsule-like rim. On T2-weighted MRI, all lesions (8/8; 100%) displayed a characteristic rim-like low-intensity capsular margin. These low-signal/density capsular margins were pathologically confirmed to be capsules containing fibrous components.</p><p><strong>Conclusions: </strong>IPT-like FDCS is very rare but has characteristic imaging features that correlate with its pathology.</p>","PeriodicalId":7126,"journal":{"name":"Abdominal Radiology","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142805957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effective remote clinical teaching: leveraging technology to improve Radiology Case readouts.","authors":"Sayf Al-Katib, Andrew Dearden, Monisha Shetty, Alexander Swantek, Majid Khan, Jacob Ghannam, Ali Beydoun, Nathan Kolderman, Kiran Nandalur, Anant Krishnan","doi":"10.1007/s00261-024-04740-8","DOIUrl":"https://doi.org/10.1007/s00261-024-04740-8","url":null,"abstract":"<p><p>The shift to remote learning in medical education is rapidly evolving and likely permanent. The recent increase in remote radiology staffing presents challenges for both educators and trainees. However, many of the barriers to teaching can be overcome by technology. The overarching goal in creating a conducive remote teaching environment is to replicate the in-person experience as much as possible. With that goal in mind, creating an environment with clear expectations, open and effective communication, and defined staffing models promotes education in the remote environment. Video conferencing and messaging applications should be utilized freely to enhance case discussions. While these tools can present barriers for users who are uncomfortable with technology-based solutions, they can result in advantages over in-person education. In this review, we present strategies to help radiology educators enhance clinical teaching in a remote setting.</p>","PeriodicalId":7126,"journal":{"name":"Abdominal Radiology","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New virtual contrast enhancement boost technique can reduce the dose of intravenous contrast medium used in computer tomography angiography of the abdominal aorta.","authors":"Julia Noschang, Adriano Tachibana, Larissa Barsotti da Silva Viviani, Murilo Marques Almeida Silva, Cynthia de Almeida Mendes, Marcelo Assis Rocha, Walther Yoshiharu Ishikawa, Nelson Wolosker, Gilberto Szarf","doi":"10.1007/s00261-024-04726-6","DOIUrl":"https://doi.org/10.1007/s00261-024-04726-6","url":null,"abstract":"<p><strong>Purpose: </strong>This study aims to evaluate the image quality of computed tomography (CT) angiograms obtained using a virtual contrast augmentation technique, adding an iodine map to the contrast-enhanced images, obtained through a digital subtraction technique, reducing the dose of intravenous iodinated contrast medium compared to the conventional institutional standard technique.</p><p><strong>Methods: </strong>This prospective investigation enrolled patients previously diagnosed with abdominal aortic aneurysms, who underwent two successive computed tomography angiographies (CTAs) of the aorta. One CTA was performed employing the virtual contrast enhancement boost technique with a 40% decrease in the intravenous contrast medium dose, while the other adhered to the conventional protocol without any reduction in contrast medium volume. After imaging, both qualitative and quantitative assessments were conducted to evaluate the opacification level of the aorta and its branching vessels.</p><p><strong>Results: </strong>The study analyzed 28 examinations from 14 subjects (two per participant). Qualitative analysis revealed that image quality was deemed adequate for diagnostic purposes, with nearly all arterial segments in both protocols rated as good or excellent. Although no statistically significant differences were detected, the average attenuation across all arterial segments in the angiograms exhibited a trend towards higher values in the virtual contrast enhancement boost technique, compared to the conventional protocol. Similarly, the signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) demonstrated comparable levels between the two methodologies.</p><p><strong>Conclusion: </strong>The application of virtual contrast enhancement in the acquisition of CT angiograms of the aorta maintains comparable image quality, while reducing the dosage of intravenous contrast medium by 40%. This approach suggests a potential for optimizing contrast use in vascular imaging, aligning with goals related to patient safety and radiological efficiency.</p>","PeriodicalId":7126,"journal":{"name":"Abdominal Radiology","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}