Mckeespivey0057

Hypochlorite acid (ClO-) is one of the major reactive oxygen species (ROS) in colon cancer, providing an effective target for colonic tumor in vivo imaging. For detection of ClO- and tumor imaging, poly[(9,9-di(2-ethylhexyl)-9H-fluorene-2,7-vinylene)-co-(1-methoxy-4-(2-ethylhexyloxy)-2,5-phenylenevinylene)] (PFV-co-MEHPV, namely CP1) was encapsulated in mesoporous silica nanoparticles (MSNs) that were pre-modified with polyphenylenevinylene (PPV) via in situ polymerization to construct bright PPV@MSN-CP1 nanoparticles. The synthesized nanoparticles were size-stable and not cytotoxic as confirmed by FE-TEM, FE-SEM, and MTT assay. Hypochlorite oxidizes the vinylidene bond of CP1 through π2-π2 cycloaddition to form PPV-dioxetane intermediates to generate photons. The CL quantum yield of PPV@MSN-CP1 was 16.7 times higher than that of Pluronic F-127 wrapped CP1. CL nanoparticles PPV@MSN-CP1 have good selectivity for hypochlorite detection among biological oxidants (mainly ROS). The linear range and the LOD of PPV@MSN@CP1 for ClO- detection are 4-90 and 1.02 μM, respectively. Subsequently, we further coated PPV@MSN@CP1 with folic acid for tumor targeting by phospholipid wrapping. PPV@MSN-CP1@FA was successfully applied for in vivo imaging of endogenously produced ClO- of tumor tissue in living animals.In this article, a new formula for the electrostatic pressure (EP) inside bulk nanobubbles (BNB) is derived. Based on the solution of the Boltzmann-Laplace equation, the value of the EP is calculated and it is shown that under certain conditions, for BNBs formed by cavitation, the EP can be the main factor of their stability.Despite medical and interventional advances, the mechanical complications of acute myocardial infarction are associated with high mortality. Timely surgical therapy requires a prompt and accurate diagnosis. Multimodality imaging has become the standard of care in modern cardiology. selleck products Despite the widespread use and cost-effectiveness of cardiac ultrasound in the acute setting, the method is highly user-dependent. In complex cases a second imaging technique is often required. The case presents the key role of multimodal imaging in the evaluation of a patient with a very rare complication of an acute myocardial infarction, a pseudoaneurysm of the interventricular septum respectively. In addition to confirming the diagnosis assumed by echocardiography, cardiac computed tomography provides additional structural and functional information essential to proper management.

A focal lesion in the region of the adrenal gland in a newborn often requires further assessment. Ultrasound (US) is the initial imaging method of choice in young children as it does not use radiation or require sedation and it has excellent spatial resolution. In this case series, we present contrast-enhanced ultrasound (CEUS) as a problem-solving tool in the evaluation of neonatal adrenal lesions.

The imaging and medical records of five patients with adrenal lesions were retrospectively reviewed. All patients underwent US as an initial examination and all had US follow-up. Additionally, two patients had MRI examinations. CEUS was performed in all patients as a follow up examination. The enhancement characteristics of the adrenal masses on CEUS were analyzed with the use of VueBox software. In addition, qualitative analysis of the cine loops for the presence of vascularization within the lesions was performed by consensus between two radiologists.

The presence of an adrenal hematoma was correctly detected and characterized by CEUS in all five cases using VueBox perfusion analysis. Adrenal hematomas had no internal perfusion and flat time intensity curves.

The quantitative and qualitative CEUS assessment of the mass can distinguish hemorrhage from a malignant lesion. Based on our findings, CEUS could serve as an alternative diagnostic tool to magnetic resonance imaging in the diagnosis of slowly resolving NAH lesions.

The quantitative and qualitative CEUS assessment of the mass can distinguish hemorrhage from a malignant lesion. Based on our findings, CEUS could serve as an alternative diagnostic tool to magnetic resonance imaging in the diagnosis of slowly resolving NAH lesions.Desmoplastic small round cell tumour (DSRCT) is a rare and highly aggressive mesenchymal neoplasm with poor prognosis that develops in male adolescents and young adults. We report the case of a 32-year-old male admitted with abdominal distension and ascites. An ultrasonography (US) scan showed multiple peritoneal masses with large ascites. The dominant mass had a hypervascular homogenous aspect at contrast-enhanced ultrasound with wash-out in the venous phase. Thoracoabdominal CT, performed for staging the disease, confirmed the US aspect. The US-guided percutaneous biopsy revealed DSRCT of the peritoneum. Chemotherapy was then started with minimal clinical improvement, increase in tumoral burden and death after three months. US and US-guided biopsy played an essential role in diagnosing this case. The aggressive course of the disease and seeding at paracentesis sites are the particularities of the presented case.

Acute pulmonary embolism (aPE) leads to a significant decrease in antegrade pulmonary blood volume (PBV), which can be measured by contrast echocardiography at the bedside. The aim of this work was to evaluate the feasibility and performance of PBV differentiating between patients with and without aPE.

A total of 89 patients underwent computed tomography pulmonary angiography (CTPA) for suspected aPE were enrolled in the study. Their clinical and conventional echocardiographic characteristics were collected. Contrast echocardiography with measurements of PBV were performed.

There were 57 patients with aPE, with a mean Mastora pulmonary artery obstruction index (PAOI) of 56.14%. Pulmonary transit time (PTT), normalized PTT (nPTT) and PBV in patients with aPE was less than one half of those in patients without PE (p<0.05). There was significant negative correlation between PBV and Mastora PAOI (r=-0.897, p<0.01). None of the conventional echocardiographic parameters had an area under the receiver operating characteristic curve of >0.5, while it was 0.997(0.984~1.010) for PBV in differentiating between patients with aPE or not. The optimal cutoff valueof PBV was 370ml, with a sensitivity of 100%, a specificity of 95.45% and an accuracy of 96.55%.

PBV had a powerful performance in differentiating between patients with aPE or not, and a PBV of <370ml indicated aPE. Contrast echocardiography is enormously useful in the recognition and differentiation of PE and can assess the severity of the PE and the patient's response to therapy.

PBV had a powerful performance in differentiating between patients with aPE or not, and a PBV of less then 370ml indicated aPE. Contrast echocardiography is enormously useful in the recognition and differentiation of PE and can assess the severity of the PE and the patient's response to therapy.

To assess chest ultrasound (US) diagnostic accuracy in pneumothorax diagnosing.

Prospec-tive studies related to the US pneumothorax diagnostic accuracy in trauma patients were extensively searched from 2000 up to November 2020. The studies features and findings were gathered using a standardised form and the methodological quality of the investigations was evaluated using the Quality Assessment of Diagnostic Accuracy Studies (QUADAS-2).

Twelve articles were finally chosen for quantitative analysis. The overall sensitivity of US scan in pneumothorax diagnosis was 89% (95%CI 86-91%). Specificity was 96% (95%CI 95-97%). The diagnostic odds ratio was 193.94 (59.009-637.40) at 95%CI, thus demonstrating high chest US accuracy in pneumothorax diagnosis.

Despite the limitations of the included studies, this systematic review and meta-analysis concluded that chest US is a reliable method for diagnosing pneu-mothorax in traumatized patients.

Despite the limitations of the included studies, this systematic review and meta-analysis concluded that chest US is a reliable method for diagnosing pneu-mothorax in traumatized patients.Trichinellosis, a parasitosis transmitted through consumption of raw or undercooked meat from pigs and game animals, is responsible for a specific myositis. The calcifications of infected myocytes and larva can be detected during many years postin-fection. We present the case of a male patient with a history of severe trichinellosis with disease onset 30 years ago, presenting with generalized muscle microcalcifications detected during musculoskeletal ultrasound evaluation. The ultrasound aspect of the muscles was indeed spectacular; hence, the comparison with a "starry night".

Less than 5% of pancreatic masses represent metastases and differentiation from primitive tumors using endo-scopic ultrasound (EUS) is difficult. The aim of our work was to assess the diagnostic value of contrast-enhanced harmonic endoscopic ultrasound (CH-EUS) for pancreatic metastases.

We retrospectively analyzed patients with pancreatic metastasis identified during a 8 year period in a tertiary medical center.

We included in the study 20 patients evaluated with EUS and CH-EUS. The primary tumor was localized in the kidney (6 cases), lung (5 cases), colon (3 cases), skin (2 patients) and stomach, breast, ovary and liver (1 patient each). Only 11 patients (55%) (kidney, lung, liver, ovary or skin metastases), presented hypervascularity at EUS and arterial hyperenhancement on CH-EUS, with similar diag-nostic value. All renal metastases were hyperenhanced (the negative predictive value 100%) and the stomach, colon and ovary metastases were hypoenhanced. The fast wash-out of contrast substance was encountered in all cases or renal, pulmonary and digestive metastases, but with 53.3-64.3% specificity for the different origin of pancreatic metastases.

The vascularity assessments on conventional EUS or CH-EUS are similar for pancreatic metastases of different origin. EUS tissue acquisition remains mandatory for the diagnosis.

The vascularity assessments on conventional EUS or CH-EUS are similar for pancreatic metastases of different origin. EUS tissue acquisition remains mandatory for the diagnosis.

To develop a decision tree model using US features to differentiate testicular torsion and other conditions of acutescrotum and to investigate predictive parameters of unsalvageable testis in testicular torsion.

ScrotalUS was reviewed in patients aged <30 years who presented with acute scrotum from 2014 to 2020. US findings of whirlpoolsign, testicular volume ratio, heterogeneous echotexture, testicular vascularity, epididymis enlargement and/or hyperemia, andavascular nodule were evaluated and compared. A decision tree model was created using the conditional inference tree analysisand the accuracy was calculated. Univariate logistic regression analysis was performed to find out the predictive US features ofunsalvageable testes.

Total of 381 patients (13.2±7.2 years old; range, 1 day-30 years) were included. Thirty-four patientswere diagnosed with testicular torsion, and the others with orchitis or epididymo-orchitis (n=59), epididymitis (n=264),and appendage torsion (n=24). In the conditional inference tree analysis, whirlpool sign, avascular nodule, and increasedtesticular vascularity were the most significant discriminators (p<0.