Sonography companies have recently developed high-frequency transducers (20–30 MHz) to image the skin and small joints. In this pictorial review, we present a number of settings where these probes can be usefully employed to scan the breast. These include skin abnormalities of the breast and axilla; nipple–areolar complex abnormalities; superficial breast parenchyma abnormalities; breast parenchyma abnormalities in subjects with implants; very small female breasts; peripheral areas in breasts of any size; pre-puberal breasts; male breasts; post-mastectomy chest wall; and intraoperative breast sonography. Comparatively, side-by-side images obtained with conventional breast frequencies and high frequencies are shown.

Coronary computed tomography angiography (CCTA) currently represents a robust imaging technique for the detection, quantification and characterization of coronary atherosclerosis. However, CCTA remains a challenging task requiring both high spatial and temporal resolution to provide motion-free images of the coronary arteries. Several CCTA features, such as low attenuation, positive remodeling, spotty calcification, napkin-ring and high pericoronary fat attenuation index have been proved as associated to high-risk plaques. This review aims to explore the role of CCTA in the characterization of high-risk atherosclerotic plaque and the recent advancements in CCTA technologies with a focus on radiomics plaque analysis.

Ureteral involvement by a tumor is common, and both partial and complete obstructions can result in symptoms that are distressing and debilitating, especially in cancer patients for whom the resection of the primary tumor is not considered an option. Maintaining ureteric patency in these patients is a challenge. In addition, in cases where a patient has undergone nephroureterectomy due to primary transitional cell cancer, it becomes necessary to decompress the urinary tract to preserve the contralateral kidney from irreversible damage. This is possibly due to ureteral stenting, both retrograde and anterograde, and percutaneous nephrostomy (PCN). Since imaging plays an important role in the routine monitoring of stents, their more and more increasing use requires radiologists to be familiar with these devices, their correct position, their potential complications, and their consequences. The aim of this review is to offer a comprehensive review of the imaging features of some urinary stents and to show the complications encountered in cancer patients as a direct consequence of an invasive diagnostic or therapeutic procedure. Specifically, we focus on ureteral stents and PCN.

Background: Femoral pseudoaneurysms are clinically heterogeneous, with substantial variability in anatomical features and patient-related bleeding risk. Standard treatment algorithms may be inadequate, particularly in patients receiving anticoagulation or presenting with altered coagulation profiles. A personalized, risk-adapted interventional strategy may optimize outcomes while preserving procedural safety. This study compares ultrasound-guided compression with endovascular and percutaneous therapies and evaluates the safety of minimally invasive approaches across different risk profiles to support individualized management. Methods: This single-center retrospective cohort study included 65 consecutive patients treated for femoral pseudoaneurysms between January 2019 and May 2025. Treatment modalities comprised ultrasound-guided compression, endovascular embolization (coils, covered stents, NBCA–Lipiodol), percutaneous glue injection, and hybrid approaches. Primary endpoints were technical and clinical success. Safety was assessed using pre- and post-procedural INR, platelet count, and hemoglobin levels. High-risk status was defined as ongoing anticoagulation or antiplatelet therapy, INR > 1.5, or platelet count <50 × 10⁹/L. Results: Endovascular and percutaneous approaches achieved significantly higher technical (100% vs. 68.5%, p = 0.006) and clinical success rates (100% vs. 77.8%, p = 0.009) compared with ultrasound-guided compression. In minimally invasive cohorts, INR and platelet counts remained stable after treatment, while hemoglobin showed an expected post-procedural decrease (p < 0.001). High-risk patients demonstrated technical success rates comparable to standard-risk patients, with no significant differences in laboratory trends. Favorable outcomes were observed across different embolic materials. Conclusions: Endovascular and percutaneous therapies provide superior effectiveness compared with ultrasound-guided compression while maintaining a reassuring safety profile, even in patients at increased bleeding risk. These findings support a personalized, patient-tailored interventional approach based on individual anatomical and clinical characteristics.

Objectives: This study aims to assess the potential role of the ultrasound (US) monochromatic Superb Microvascular Index (mSMI) to predict malignancy of solid focal lesions, correlating the vascular index (VI) with bioptic histological results. Methods: In this single-center retrospective analysis, patients undergoing percutaneous US-guided biopsy of solid lesions were considered. Biopsy indication was given by a multidisciplinary team evaluation based on clinical radiological data. Exclusion criteria were: unfeasible SMI evaluations due to poor respiratory compliance, locations not appreciable with the SMI, previous antiangiogenetic chemo/immunotherapies, and inconclusive histological reports. The mSMI examination was conducted in order to visualize extremely low-velocity flows with a high resolution and high frame rate; the VI was semi-automatically calculated. All bioptic procedures were performed under sole US guidance using 16G or 18G needles, immediately after mSMI assessment. Results: Forty-four patients were included (mean age: 64 years; 27 males, 17 females). Liver (15/43), kidneys (9/43), and lymph nodes (6/43) were the most frequent targets. At histopathological analysis, 7 lesions were benign and 37 malignant, metastasis being the most represented. The VI calculated in malignant lesions was statistically higher compared to benign lesions (35.45% and 11% in malignant and benign, respectively; p-value 0.013). A threshold VI value of 15.4% was identified to differentiate malignant lesions. The overall diagnostic accuracy of the VI with the mSMI was 0.878, demonstrating a high level of diagnostic accuracy. Conclusions: In this study, the mSMI analysis of solid focal lesions undergoing percutaneous biopsy significantly correlated with histological findings in terms of malignant/benign predictive value, reflecting histological vascular changes in malignant lesions.