Over the last 20 years, scientific literature and interest on chest/lung ultrasound (LUS) have exponentially increased. Interpreting mixed-anatomical and artifactual-pictures determined the need of a proposal of a new nomenclature of artifacts and signs to simplify learning, spread, and implementation of this technique. The aim of this review is to collect and analyze different signs and artifacts reported in the history of chest ultrasound regarding normal lung, pleural pathologies, and lung consolidations. By reviewing the possible physical and anatomical interpretation of these artifacts and signs reported in the literature, this work aims to present the AdET (Accademia di Ecografia Toracica) proposal of nomenclature and to bring order between published studies.

UNASSIGNED: This study aimed to determine an optimal machine learning (ML) model for evaluating the preoperative diagnostic value of ultrasound signs of breast cancer lesions for sentinel lymph node (SLN) status.
UNASSIGNED: This study retrospectively analyzed the ultrasound images and postoperative pathological findings of lesions in 952 breast cancer patients. Firstly, the univariate analysis of the relationship between the ultrasonographic features of breast cancer morphological features and SLN metastasis. Then, based on the ultrasound signs of breast cancer lesions, we screened ten ML models: support vector machine (SVM), extreme gradient boosting (XGBoost), random forest (RF), linear discriminant analysis (LDA), logistic regression (LR), naive bayesian model (NB), k-nearest neighbors (KNN), multilayer perceptron (MLP), long short-term memory (LSTM), and convolutional neural network (CNN). The diagnostic performance of the model was evaluated using the area under the receiver operating characteristic (ROC) curve (AUC), Kappa value, accuracy, F1-score, sensitivity, and specificity. Then we constructed a clinical prediction model which was based on the ML algorithm with the best diagnostic performance. Finally, we used SHapley Additive exPlanation (SHAP) to visualize and analyze the diagnostic process of the ML model.
UNASSIGNED: Of 952 patients with breast cancer, 394 (41.4%) had SLN metastasis, and 558 (58.6%) had no metastasis. Univariate analysis found that the shape, orientation, margin, posterior features, calculations, architectural distortion, duct changes and suspicious lymph node of breast cancer lesions in ultrasound signs were associated with SLN metastasis. Among the 10 ML algorithms, XGBoost had the best comprehensive diagnostic performance for SLN metastasis, with Average-AUC of 0.952, Average-Kappa of 0.763, and Average-Accuracy of 0.891. The AUC of the XGBoost model in the validation cohort was 0.916, the accuracy was 0.846, the sensitivity was 0.870, the specificity was 0.862, and the F1-score was 0.826. The diagnostic performance of the XGBoost model was significantly higher than that of experienced radiologists in some cases (P<0.001). Using SHAP to visualize the interpretation of the ML model screen, it was found that the ultrasonic detection of suspicious lymph nodes, microcalcifications in the primary tumor, burrs on the edge of the primary tumor, and distortion of the tissue structure around the lesion contributed greatly to the diagnostic performance of the XGBoost model.
UNASSIGNED: The XGBoost model based on the ultrasound signs of the primary breast tumor and its surrounding tissues and lymph nodes has a high diagnostic performance for predicting SLN metastasis. Visual explanation using SHAP made it an effective tool for guiding clinical courses preoperatively.

UNASSIGNED: The functions of estrogen receptor (ER), progesterone receptor (PR), human epidermal growth factor receptor 2 (HER2) and Ki-67 in breast cancer have been explored. This study was carried out to explore ER, PR, HER-2 and Ki-67 expression levels in breast cancer patients and their relationship with ultrasound signs and prognosis.
UNASSIGNED: A total of 274 female primary breast cancer patients received preoperative ultrasound examination. ER, PR, HER-2 and Ki-67 expression levels in breast cancer tissues were detected by immunohistochemical staining after surgery. The correlations of ER, PR, HER-2 and Ki-67 expression with ultrasound signs and prognosis of breast cancer patients were analyzed.
UNASSIGNED: The positive expression rate of ER, PR and HER-2 and Ki-67 high expression in 274 breast cancer patients was 73.36% (201/274), 59.85% (164/274), 24.09% (66/274) and 66.06% (181/274), respectively. ER-positive expression had association with lymph node metastasis (LNM) and blood flow grading; HER-2-positive expression was associated with LNM, while Ki-67-positive expression was related to the tumor diameter, LNM, and blood flow grading. LNM and Ki-67 high expression were risk factors for OS; PR-positive was a protective factor for OS; TNM stage, tumor diameter, LNM and Ki-67 high expression were risk factors for DFS in breast cancer patients.
UNASSIGNED: ER, PR, HER-2 and Ki-67 in breast cancer are related to the ultrasound signs and prognosis of breast cancer patients. The joint detection of multiple indicators provides a reference for the individualized treatment of targeted drugs.

OBJECTIVE: To report the preoperative ultrasound (US) signs of isolated fallopian tube torsion in surgically verified cases and to estimate whether preoperative US detection of this condition can be improved.
METHODS: The charts of 27 women with a surgical diagnosis of isolated fallopian tube torsion at a tertiary medical center from 2005 to 2016 were retrospectively reviewed. Data were collected from the electronic database of the US unit and compared with the surgical findings.
RESULTS: Isolated fallopian tube torsion was correctly diagnosed by US before surgery in 8 of the 27 women (29.6%). In the remainder, the US signs were attributed to torsion of the ovary or the entire adnexa (n = 13), or no torsion was suspected (n = 6). Fallopian tube edema was listed as a US finding in 7 patients, of whom 5 had a correct diagnosis of isolated fallopian tube torsion. The presence of a paraovarian cyst concomitant with normal-appearing ovaries was assumed by US in 5 of the 8 cases that were accurately diagnosed as isolated fallopian tube torsion. The most misinterpreted US finding was an ovarian cyst (suspected in 10 patients and verified at surgery in 2). Absence of blood flow was described in 12 women, of whom 5 had an accurate diagnosis of isolated fallopian tube torsion. Six of the patients with a correct US diagnosis were adults (37.5% of total adults), and 2 were adolescents (18.2% of total adolescents).
CONCLUSIONS: The US diagnosis of isolated fallopian tube torsion is challenging. A high index of suspicion is necessary to improve its detection, especially when there are possible US signs of torsion in the presence of a normal-appearing ovary.

Intestines, especially the small bowel, are rarely subject to US assessment due to the presence of gases and chyme. The aim of this paper was to analyze ultrasound images in selected pathologies of the small intestine in adults, including the aspects of differential diagnosis.
METHODS: In 2001-2012, abdominal ultrasound examinations were conducted in 176 patients with the following small bowel diseases: Crohn\'s disease (n=35), small bowel obstruction (n=35), yersiniosis (n=28), infectious diarrhea (n=26), bacterial overgrowth syndrome (n=25), coeliac disease (n=15) and small bowel ischemia (n=12). During examinations patients were fasting and no other particular preparations were needed. Convex transducers of 3.5-6 MHz and linear ones of 7-12 MHz were used. The assessment of the small intestine in four abdominal quadrants constituted an integral element of the examination. The following features of the small bowel ultrasound presentation were subject to analysis: thickness and perfusion of the walls, presence of thickened folds in the jejunum, reduction of their number, presence of fluid and gas contents in the intestine, its peristaltic activity, jejunization of the ileum and enteroenteric intussusception. Furthermore, the size of the mesenteric lymph nodes and the width of the superior mesenteric artery were determined and the peritoneal cavity was evaluated in terms of the presence of free fluid.
RESULTS: Statistically significant differences were obtained between the thickness of the small intestine in Crohn\'s disease or in ischemic conditions and the thickness in the remaining analyzed pathological entities. Small bowel obstruction was manifested by the presence of distended loops due to gas and fluid as well as by severe peristaltic contractions occurring periodically. In the course of ischemic disease, the intestinal walls were thickened without the signs of increased perfusion and in the majority of cases intestinal stenosis was observed. Fluid in the intestine was detected in all patients with coeliac disease, gas in 86.7% of patients, thickening of the folds in the jejunum in 86.7%, their reduction in 80%, increased (enhanced) peristalsis in 93.3% and jejunization in 40%. In 80% of coeliac disease cases, the intestine showed the features of hyperemia on color Doppler examination and in 53.3% of patients the dilated lumen of the superior mesenteric artery was detected. Enlarged mesenteric lymph nodes were visualized in 73.3% of the subjects, enteroenteric intussusception in 33.3% and free fluid in the peritoneal cavity in 60%.
CONCLUSIONS: Small bowel obstruction is manifested by the presence of evidently dilated intestinal loops filled with gas and fluid and periodical severe deepened peristalsis.Ischemic changes and Crohn\'s disease are characterized by the presence of fragmentarily thickened intestinal walls and intestinal stenosis. Moreover, in Crohn\'s disease, increased wall perfusion and mesenteric adenomegaly is encountered.Coeliac disease is manifested by: increased amount of fluid mainly in the jejunum, thickened and hyperemic jejunal walls, increased peristalsis;hypertrophied mucosal folds - often their number is reduced, jejunization and transient enteroenteric intussusception;ultrasound changes that require the differentiation with small intestinal bacterial overgrowth syndrome and, to a lesser degree, with infectious diarrhea.
Jelita, a zwłaszcza jelito cienkie, rzadko są przedmiotem badań ultrasonograficznych, głównie ze względu na zawartość gazów i treści pokarmowej. Celem pracy była analiza obrazu ultrasonograficznego wybranych chorób jelita cienkiego u osób dorosłych, w tym pod kątem ich diagnostyki różnicowej.
W latach 2001–2012 wykonano badania ultrasonograficzne jamy brzusznej u 176 pacjentów z następującymi chorobami jelita cienkiego: chorobą Leśniowskiego-Crohna (n=35), niedrożnością jelita cienkiego (n=35), jersiniozą (n=28), biegunką infekcyjną (n=26), zespołem rozrostu bakteryjnego (n=25), chorobą trzewną (n=15) i niedokrwieniem jelita cienkiego (n=12). Chorych badano na czczo, bez żadnego przygotowania, stosując głowice konweksowe 3,5–6 MHz i liniowe 7–12 MHz. Integralnym elementem badania była ocena jelita cienkiego w czterech kwadrantach jamy brzusznej. Analizie poddano następujące elementy obrazu ultrasonograficznego jelita cienkiego: grubość i stopień unaczynienia ścian, obecność pogrubiałych fałdów w jelicie czczym, redukcję ich liczby, obecność treści płynnej i gazowej w jelicie, jego aktywność perystaltyczną, występowanie jejunizacji jelita krętego i wgłobienia enteroenteralnego. Ponadto określano wielkość węzłów chłonnych krezkowych i szerokość tętnicy krezkowej górnej, oceniano jamę otrzewnej pod kątem obecności wolnego płynu.
Uzyskano istotne statystycznie różnice między grubością ścian jelita cienkiego w chorobie Leśniowskiego-Crohna oraz w przebiegu zmian niedokrwiennych a jej grubością w pozostałych analizowanych jednostkach chorobowych. Niedrożność jelita cienkiego przejawiała się obecnością rozdętych przez gaz i płyn pętli oraz pojawiającymi się okresowo silnymi skurczami perystaltycznymi. W przebiegu zmian niedokrwiennych ściany jelita były pogrubiałe, bez cech wzmożonego unaczynienia, w większości przypadków stwierdzono zwężenie światła jelita. Płyn w jelicie odnotowano u wszystkich chorych z chorobą trzewną, gaz u 86,7% pacjentów, zgrubienie fałdów w jelicie czczym u 86,7%, ich redukcję u 80%, wzmożoną perystaltykę jelit u 93,3%, a jejunizację u 40%. W 80% przypadków choroby trzewnej jelito wykazywało cechy przekrwienia w badaniu kolorowym dopplerem, u 53,3% pacjentów stwierdzono poszerzenie światła tętnicy krezkowej górnej. Powiększone węzły chłonne krezkowe uwidoczniono u 73,3% badanych, wgłobienie enteroenteralne u 33,3%, natomiast wolny płyn w jamie otrzewnej u 60% osób.
Niedrożność jelita cienkiego przejawia się obecnością wyraźnie poszerzonych pętli jelitowych wypełnionych gazem i płynem oraz okresowo pojawiającą się silną, pogłębioną perystaltyką.Zmiany niedokrwienne i w przebiegu choroby Leśniowskiego-Crohna cechują się obecnością odcinkowego pogrubienia ścian jelita i zwężenia jego światła, ponadto w chorobie Leśniowskiego-Crohna – wzmożonego unaczynienia ścian i adenomegalii krezkowej.Choroba trzewna manifestuje się obecnością: zwiększonej ilości płynu, głównie w jelicie czczym; ściany jelita czczego są pogrubiałe i przekrwione, perystaltyka ulega przyspieszeniu;przerośniętych fałdów błony śluzowej – nierzadko mamy do czynienia ze zmniejszeniem ich liczby, jejunizacją i przemijającym wgłobieniem enteroenteralnym;zmian ultrasonograficznych wymagających różnicowania przede wszystkim z zespołem rozrostu bakteryjnego jelita cienkiego i w mniejszym stopniu z biegunką infekcyjną.