Emergency Radiology最新文献

Background: Diagnosis of child abuse in children evaluated for a blunt abdominal trauma can be challenging due to overlapping types of injuries.

Objective: Identify clinical characteristics and CT findings that differentiate children evaluated for accidental abdominal trauma (AcAT) and abusive abdominal trauma (AbAT).

Materials and methods: Retrospective (1/2010 to 6/2024) study on children < 3 years-old who had an abdominal CT scan for AcAT or AbAT. Demographic, clinical, and imaging variables were compared between CT-positive child abuse, and accidental trauma.

Results: Abdominal CT positive for trauma was found in 26.5% (82/309) children that were evaluated for AAT and in 28.8% (42/146) for AcAT. Children with positive CT for AbAT were significantly younger (average age 0.9 ± 0.9 versus 1.8 ± 0.9 years), and most (70.7%) were younger than one year old. Most children evaluated for AbAT with positive CT (70.7%) had an unknown cause of injury. The most common mechanism provided for abused children was low height fall (18/82, 22.0%) as compared with no low height fall in accidental trauma (p < 0.001). Rib fractures were identified on CT in 5049/82 children (61.059.8%) evaluated for AbAT as compared with 4/42 (9.5%) in children evaluated for AcAT (p < 0.001).

Conclusion: In children evaluated for blunt abdominal trauma, presence of rib fractures should alert radiologists to the possibility of child abuse. Abused children were mostly younger than one year, with an unknown mechanism of injury or a fall from a low height.

Purpose: This study aimed to identify the radiological CT findings that are significantly correlated with the outcome of conservative management with oral water-soluble contrast medium in patients presenting with Adhesive Small Bowel Obstruction (ASBO) to the Emergency Room.

Methods: In this retrospective single-center study, we considered all consecutive patients admitted to the ER from February 2019 to February 2023 for ASBO with an available contrast-enhanced CT scan performed at diagnosis and treated with conservative management. The investigated CT findings were type and location of transition zone, ASBO degree, fat notch sign, beak sign, small bowel feces sign, presence of peritoneal free fluid and pneumatosis intestinalis. Radiological parameters were analyzed using univariable and multivariable logistic regression to test the significant association between the CT parameters and the target.

Results: Among the 106 included patients (median age 74.5 years), conservative treatment was effective in 59 (55.7%) and failed in 47 (44.3%), needing delayed surgery. In the failure group, there was a higher prevalence of patients who had previous ASBO episodes (p = 0.03), a greater proportion of females (p = 0.04) and a longer hospital stay (p < 0.001). At multivariable analysis, two CT findings were significantly correlated with failure of conservative treatment: fat notch sign (OR = 2.95; p = 0.04) and beak sign (OR = 3.42; p = 0.04).

Conclusions: Two radiological signs correlate with failure of non-operative management in ASBO, suggesting their importance in surgical decision-making. Patients presenting with these signs are at higher risk of unsuccessful conservative treatment and may require undelayed surgical intervention.

Epiploic appendagitis of the vermiform appendix is a rare cause of right lower abdominal pain that can mimic acute appendicitis and result in unnecessary surgery. Despite this, the condition can be managed with non-steroidal anti-inflammatory drugs alone. Due to the lack of characteristic physical or laboratory findings, accurate diagnosis by imaging is crucial. The aim of this case report is to emphasize this uncommon condition to prevent misdiagnosis and avoid unnecessary surgical interventions. A 57-year-old man presented with a 2-day history of abdominal pain and tenderness in the right abdominal region. Laboratory results were within the normal range. The surgeon diagnosed him as distal appendicitis or colonic diverticulitis and treated him with antibiotics, leading to improvement within several days. A subsequent review of the plain computed tomography images by the radiologist detected an oval fat density surrounded by a high-intensity rim and a high-density spot in the center at the tip of normal vermiform appendix. This led to a diagnosis of epiploic appendagitis on the vermiform appendix. Epiploic appendagitis is characterized by inflammation and ischemia resulting from torsion of the epiploic appendage. It can occur not only on the colon but also on the appendix. The imaging findings in this case were typical of epiploic appendagitis on the appendix. It is imperative for clinicians to be familiar with the clinical presentation and imaging findings of epiploic appendagitis on the appendix to ensure an accurate diagnosis, reduce unnecessary surgeries, thereby enhancing patient outcomes.

Purpose: To assess whether adult trauma center status influences radiology resident performance on trauma cases in the Emergent/Critical Care Imaging SIMulation (WIDI SIM) exam.

Materials and methods: This retrospective study analyzed 29,290 WIDI SIM exam scores from 110 adult trauma cases across 55 radiology residency programs. Residents were categorized by training level-R1 (n = 17,801), R2 (n = 9,136), R3 (n = 1,826), R4 (n = 527)-and by their program's adult trauma center designation: Level 1 (n = 20,121), Level 2 (n = 1,870), Level 3 (n = 1,029), Level 4 (n = 487), and no trauma designation (n = 5,834). A Generalized Linear Mixed Model with a negative binomial distribution was used to evaluate the effect of trauma center status on resident performance, adjusting for resident level, imaging modality, and case specialty.

Results: After adjusting for confounding variables, there was no statistically significant difference in resident scores based on adult trauma center status (p > 0.05 for all trauma levels compared to no trauma designation). Resident level significantly influenced performance, with higher-level residents scoring better than R1 residents (p < 0.001 for R2-R4). Imaging modality and case specialty also significantly affected scores. Residents performed better on MR, US, and XR modalities compared to CT (p ≤ 0.002), and scored lower on chest, cardiovascular, musculoskeletal, and neuro cases compared to abdominopelvic cases (p < 0.001).

Conclusion: Adult trauma center status did not significantly impact radiology resident performance on trauma cases in the WIDI SIM exam. Resident training level, imaging modality, and case specialty were significant factors influencing performance. These findings suggest that resident education and exposure to diverse imaging modalities and specialties are more critical determinants of diagnostic accuracy than the trauma center designation of their training program.

Purpose: Splenic artery embolization (SAE) has emerged as a promising alternative for managing variceal bleeding secondary to portal hypertension (PH). This study aims to elucidate the significance of SAE in managing esophageal variceal bleeding in patients with PH, providing an overview of its efficacy, safety, and role in PH management.

Methods: A systematic review and meta-analysis were conducted in accordance with PRISMA standards. EMBASE, PubMed, Scopus, and Web of Science databases were searched from inception until April 14, 2024. Original observational and clinical studies on SAE in managing variceal bleeding due to PH were included. Meta-analyses were performed using a random-effects model, and publication bias was assessed using regression and rank correlation tests for funnel plot asymmetry.

Results: Eighteen studies met the inclusion criteria, encompassing 531 patients. The meta-analysis revealed a significant reduction in variceal bleeding post-SAE (RD = -0.86; 95% CI: -0.97, -0.75; p < 0.001). Complete resolution of varices was observed in 26% of patients (95% CI: 11%, 45%; p = 0.006), and 78% showed improvement in variceal grade (95% CI: 43%, 88%; p < 0.001). SAE significantly increased platelet counts (SMD = 1.15; 95% CI: 0.63, 1.68; p < 0.001). Common complications included post-embolization syndrome, and the overall complication rate was low.

Conclusions: This systematic review and meta-analysis study supports the efficacy and safety of SAE in managing variceal bleeding due to PH, demonstrating significant reductions in bleeding, improvements in variceal grade, and increases in platelet counts.

Purpose: Acute abdominal aortic dissection (AD) is a serious disease. Early detection based on ultrasound (US) can improve the prognosis of AD, especially in emergency settings. We explored the ability of deep learning (DL) to diagnose abdominal AD in US images, which may help the diagnosis of AD by novice radiologists or non-professionals.

Methods: There were 374 US images from patients treated before June 30, 2022. The images were classified as AD-positive and AD-negative images. Among them, 90% of images were used as the training set, and 10% of images were used as the test set. A Densenet-169 model and a VGG-16 model were used in this study and compared with two human readers.

Results: DL models demonstrated high sensitivity and AUC for diagnosing abdominal AD in US images, and DL models showed generally better performance than human readers.

Conclusion: Our findings demonstrated the efficacy of DL-aided diagnosis of abdominal AD in US images, which can be helpful in emergency settings.

Upper tract urothelial carcinoma (UTUC) is a rare and challenging subset of the more frequently encountered urothelial carcinomas (UCs), comprising roughly 5-7% of all UCs and less than 10% of all renal tumors. Hematuria is a common presenting symptom in the emergency setting, often prompting imaging to rule out serious etiologies, with UTUC especially posing as a diagnostic challenge. These UTUC lesions of the kidney and ureter are often small, mimicking other pathologies, and are more aggressive than typical UC of the bladder, emphasizing the importance of timely and accurate diagnosis. Multidetector computed tomography urography (CTU) is the standard imaging modality for diagnosis, tumor staging, and surgical planning. Various postprocessing techniques like multiplanar reconstructions, maximal intensity projection (MIP) images, and 3D volumetric rendering technique (VRT) are crucial for accurate detection. In addition, 3D cinematic rendering (CR) is a novel technique that employs advanced illumination models, producing images with realistic shadows and increased surface detail, outperforming traditional VRT. We will review the distinctive imaging features between UTUC and infiltrating mimicking lesions on CTU in patients who presented with hematuria, in conjunction with advanced postprocessing techniques, ultimately improving diagnostic confidence and preoperative planning in the emergency context.