OBJECTIVE: The present study is aimed at comparing the quality of sonographic abdominal images obtained in fasting and non fasting children. MATERIALS AND METHODS: This is a prospective study including children aged up to 12 years sequentially evaluated by two sonographers. The images were classified according to a score as follows: 1 (non-visualized or partially visualized, inappropriate for diagnosis); 2 (sufficient for diagnosis); or 3 (excellent). Images were also classified into "diagnostic" or "non diagnostic". RESULTS: Seventy-seven patients (47 boys and 30 girls) with ages ranging between 0 and 12 years (median = 1 year) were evaluated. Fasting proved a statistically significant advantage only for evaluating the gallbladder by only one of the observers (p = 0.032). Once the images were classified into either "diagnostic" or "non diagnostic" no difference was observed between the two groups. CONCLUSION: The authors conclude that fasting did not affect significantly the quality of abdominal sonographic images in children.

Keywords: Ultrasonography, Children, Abdominal, Fasting

OBJECTIVE: The purpose of this study was to evaluate the interobserver variability of ultrasound in the measurement of subcutaneous, visceral and perirenal fat through standard technique. MATERIALS AND METHODS: From November 2006 to January 2007, 50 patients were evaluated. The subcutaneous fat thickness was measured with a 7.5 MHz linear transducer transversely positioned 1 cm above the umbilical scar. For the visceral fat, a 3.5 MHz transducer was also positioned 1 cm above the umbilical scar, considering the distance between the internal surface of the abdominal rectus muscle and the posterior aortic wall in the abdominal midline. The perirenal fat was measured in the middle third of the right kidney, with the transducer positioned at the axillary midline. RESULTS: The t-Student test was utilized to analyze the interobserver reproducibility with significance level of 95%. No statistically significant difference was observed among mean values for subcutaneous, visceral and perirenal fat (p = 0.7141, 0.7286 and 0.6368, respectively). Mean and standard deviation corresponded to 2.64 ± 1.37 for subcutaneous thickness, 6.84 ± 2.38 for visceral fat, and 4.89 ± 2.6 for perirenal fat. CONCLUSION: Ultrasound presented a good interobserver reproducibility in the evaluation of abdominal fat based on measurement of subcutaneous, visceral and perirenal fat as parameters.

Keywords: Abdominal fat, Ultrasound, Metabolic syndrome

OBJECTIVE: To utilize ultrasonography for evaluating the esophageal transit time as well as the esophagus capability of differentiating among non-solid substances ingested (water and yoghurt). MATERIALS AND METHODS: Twenty-two young adults of both sexes with no gastric or esophageal complaint were evaluated, with a B-mode 3.5 MHz, convex transducer placed over the epigastric area. The esophageal transit time was determined by means of a chronometer activated when the deglutition was initiated (glottic movement), and stopped upon visualization of the bolus through the intra-abdominal esophagus. RESULTS: The mean esophageal transit time for water was 6.64 ± 1.83 sec, and 8.59 ± 2.70 sec for yoghurt. The comparative statistical analysis by a t-paired test has demonstrated statistically significant differences between the mean esophageal transit times for the two substances. CONCLUSION: This new experimental method for evaluating the esophageal transit time by ultrasonography demonstrates significant differences in the time required for a determined liquid or pasty food passing through the esophagus, elucidating clinical suspicions and allowing a more precise indication for further, more complex clinical studies.

Keywords: Ultrasonography, Esophageal transit time, Abdominal esophagus

OBJECTIVE: To determine the influence of intraabdominal pressure in the ultrasonographic evaluation of the urethrovesical junction (UVJ) and proximal urethra (PU) in patients with stress urinary incontinence (SUI). MATERIALS AND METHODS: A prospective, cross-sectional study was conducted at the Urinary Incontinence Research Unit of "Universidade Federal de Pernambuco", Brazil, from January 2002 to January 2005. Perineal ultrasounds of the UVJ and PU were performed in thirty-six women complaining of SUI with the bladder virtually empty (< 50 ml); simultaneous measurement of the intraabdominal pressure was also performed. An ultrasound machine with a computer chip and a high-resolution photographic camera connected to a 7 MHz vaginal probe was used for the evaluation. In order to measure the intraabdominal pressure, an urodynamic equipment with a 10fr rectal catheter connected to a pressure sensitive balloon was used. RESULTS: The age of the patients ranged from 25 to 69 years (mean 46.4 ± 10.2 years). On Valsava maneuver, the intra-abdominal pressure ranged from 7 to 193 cmH2O (mean: 99.3 ± 51.8 cmH2O; median: 99.5 cmH2O). Eight out of 31 (25.8%) patients with UVJ hypermobility had an intraabdominal pressure lower than 60 cmH2O. There was no statistically significant association between intraabdominal pressure and the ultrasound parameters studied. CONCLUSION: There is a specific urethral pressure index for each woman with SUI. However, there is no significant association between increase in intraabdominal pressure and increase of UVJ and UP hypermobility in women with clinical SUI.

Keywords: Stress urinary incontinence, Abdominal pressure, Perineal ultrasound, Urethrovesical junction

OBJECTIVE: To determine and compare the efficacy of image-guided percutaneous needle aspiration (PNA) versus percutaneous catheter drainage (PCD) in the treatment of intra-abdominal liquid collections. MATERIALS AND METHODS: A prospective study involving 52 patients referred to our service for percutaneous treatment of abdominal liquid collections was carried out. Sixteen of these patients had intra-abdominal liquid collections (six patients with simple localized collections and ten patients with complex, multiseptated or multiple, collections). The volume of the collections ranged from 40 to 1,200 ml (median, 200 ml). PCD was performed in ten (62.5%) collections and PNA in six (37.5%) collections. Successful treatment was defined as complete resolution of the collection with both clinical and laboratorial recovery. RESULTS: Success was achieved in 75% of cases. The success rate was 100% and 60% in the groups submitted to PNA and PCD, respectively. Successful treatment was observed in 50% of the patients submitted to PCD with collections £ 200 ml, and in 75% of the patients with larger collections. Complete resolution with PCD was obtained in 33.3% of complex, 42.9% of infected and 100% of simple or sterile collections. Only two minor complications (transient bacteremia and cutaneous infection) due to the procedures were observed. CONCLUSION: Our results showed that PCD and PNA are safe and effective in the treatment of intra-abdominal collections. In this study, needle aspiration was more effective than drainage, particularly for smaller collections.

Keywords: Intra-abdominal collections, Percutaneous needle aspiration, Percutaneous catheter drainage

OBJECTIVE: To review the abdominal ultrasound findings in patients with serologically proven dengue fever and to compare the results with data from the literature. MATERIALS AND METHODS: Thirty-eight patients with serologically proven dengue fever, 25 female and 13 male, mean age of 35 years, were submitted to abdominal ultrasound. The ultrasound findings were compared with data from the literature. RESULTS: The most relevant ultrasound findings were diffuse gallbladder wall thickening in 18 cases (47.4%), abdominal and/or pelvic free fluid in 12 (31.6%), splenomegaly in 11 (28.9%), hepatomegaly in 10 (26.3%) and perivesicular fluid in 10 (26.3%). Twenty-six percent of the patients had normal abdominal ultrasound. CONCLUSION: Abdominal sonography is a useful additional diagnostic tool for the confirmation of suspected cases of dengue hemorrhagic fever and for the evaluation of severity and progression of the disease. The knowledge of the ultrasound possible findings in patients with dengue fever is of extreme importance for the radiologist.

Keywords: Dengue, Ultrasound, Abdominal findings

OBJECTIVE: To evaluate the contribution of abdominal ultrasound in the follow-up of a group of post-treatment breast cancer patients. MATERIAL AND METHODS: We retrospectively studied the findings of abdominal ultrasound examinations of 100 patients treated for primary breast cancer. These patients were attended from January to December of 1997 at the Ultrasound Sector, Division of Radiology of the Department of Clinical Medicine of the "Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo", SP, Brazil. Information such as age, histological type, staging, number of examinations and ultrasound findings were rated and analyzed. RESULTS: Abdominal ultrasound was normal in 70% of the patients whereas liver metastases were diagnosed in 3% of the patients. CONCLUSION: The majority of the abnormalities identified were not directly related to complications of breast cancer.

Keywords: Breast cancer, Abdominal ultrasound, Follow-up

Objective: To utilize intra-abdominal esophagus ultrasonography to evaluate esophageal transit time for water and yogurt in orthostatic position, and to evaluate the influence of gender and body mass index. Materials and Methods: The present study included 89 young adults [40 women (mean age, 20.13 ± 1.62 years) and 49 men (mean age, 20.43 ± 2.17 years)] who did not show upper gastrointestinal tract disorder. Esophageal transit time was measured with the patient in orthostatic position during water and yogurt swallowing. Results: Esophageal transit time for women and men was, respectively, 5.84 ± 1.60 seconds versus 6.66 ± 1.68 seconds with water, and 9.12 ± 1.96 seconds versus 9.28 ± 1.70 seconds with yogurt. No difference between genders was observed in spite of the lower body mass index in women. Conclusion: Data regarding esophageal transit time for liquid (water) and pasty (yogurt) food swallowed by young adults in the orthostatic position did not demonstrate any difference between genders even in women with lower body mass index as compared with men.

Keywords: Ultrasonography; Intra-abdominal esophagus; Body mass index.

Gossypiboma is a term utilized to describe a mass developed from a matrix of cotton fibers surrounded by inflammatory granulomatous reaction. Its incidence is estimated at 0.15% to 0.2% of laparotomies. A foreign body within the abdominal cavity may provide a niche for proliferation of microorganisms, acting as primary focus for development of an abscess and peritonitis. Several studies have demonstrated the relevance of clinical correlation with the findings of different imaging methods (conventional radiography, ultrasonography, computed tomography and magnetic resonance imaging) in the diagnosis of gossypibomas. The present pictorial essay is aimed at demonstrating a series of typical cases of abdominal gossypibomas and illustrating the several presentations of such mass, with emphasis on the findings at different imaging methods in order to familiarize radiologists with this entity and with the main differential diagnosis.

Keywords: Gossypiboma; Abdominal; Imaging diagnosis.

Intramural duodenal hematomas secondary to blunt trauma, determining rapid luminal obstruction, are rare, benign lesions and may be confused with obstructive neoplastic conditions (either parietal or produced by extrinsic compression mechanisms). The present report describes a case of post-traumatic intestinal obstruction by an intramural hematoma in the third duodenal segment. Imaging diagnosis and the conservative management of such obstruction are discussed.

Keywords: Hematoma; Blunt abdominal trauma; Intestinal obstruction.

OBJECTIVE: To evaluate the accuracy in the detection of abdominal aortic calcification by densitometry as compared with lateral spine radiography. MATERIALS AND METHODS: Study comprising 80 individuals, 50 of them with abdominal aortic calcification and 30 without calcification. Densitometry was performed once for each participant, with the patient in right lateral decubitus position. RESULTS:Both groups were similar in terms of age range and body mass index - mean age of 74.56 ± 10.55 years and 68.40 ± 10.80 years and mean body mass index of 28.94 ± 6.06 kg/m², and 26.84 ± 4.11 kg/m², respectively for the individuals with abdominal aortic calcification and for the individuals without calcification. A statistical comparison between densitometry and radiography demonstrates similar performances of the two methods in the detection of abdominal aortic calcification, with 100% specificity and positive predictive value, 94% sensitivity, 90.9% negative predictive value, and 96.3% accuracy. Qualitative equivalence in diagnosis was demonstrated by kappa correlation index of 0.922. CONCLUSION: The results obtained by radiography and densitometry were statistically equivalent, which endorses the indication of densitometry for investigating abdominal aortic calcification.

Keywords: Atherosclerosis; Abdominal aorta; Densitometry.

OBJECTIVE: To evaluate the sonographic measurement of subcutaneous and visceral fat in correlation with the grade of hepatic steatosis. MATERIALS AND METHODS: In the period from October 2012 to January 2013, 365 patients were evaluated. The subcutaneous and visceral fat thicknesses were measured with a convex, 3-4 MHz transducer transversely placed 1 cm above the umbilical scar. The distance between the internal aspect of the abdominal rectus muscle and the posterior aortic wall in the abdominal midline was considered for measurement of the visceral fat. Increased liver echogenicity, blurring of vascular margins and increased acoustic attenuation were the parameters considered in the quantification of hepatic steatosis. RESULTS: Steatosis was found in 38% of the study sample. In the detection of moderate to severe steatosis, the area under the ROC curve was 0.96 for women and 0.99 for men, indicating cut-off values for visceral fat thickness of 9 cm and 10 cm, respectively. CONCLUSION: The present study evidenced the correlation between steatosis and visceral fat thickness and suggested values for visceral fat thickness to allow the differentiation of normality from risk for steatohepatitis.

Keywords: Abdominal fat; Steatosis; Metabolic syndrome; Ultrasonography.

OBJECTIVE: To evaluate the incidence and spectrum of abdominal computed tomography imaging findings in patients with paracoccidioidomycosis. MATERIALS AND METHODS: Retrospective analysis of abdominal computed tomography images of 26 patients with disseminated paracoccidioidomycosis. RESULTS: Abnormal abdominal tomographic findings were observed in 18 patients (69.2%), while no significant finding was observed in the other 8 (30.8%) patients. CONCLUSION: Computed tomography has demonstrated to play a relevant role in the screening and detection of abdominal abnormalities in patients with disseminated paracoccidioidomycosis.

Keywords: Paracoccidioidomycosis; Disseminated paracoccidioidomycosis; Abdominal computed tomography.

OBJECTIVE: To test the accuracy and reproducibility of ultrasound and computed tomography (CT) for the quantification of abdominal fat in correlation with the anthropometric, clinical, and biochemical assessments. MATERIALS AND METHODS: Using ultrasound and CT, we determined the thickness of subcutaneous and intra-abdominal fat in 101 subjects—of whom 39 (38.6%) were men and 62 (61.4%) were women—with a mean age of 66.3 years (60-80 years). The ultrasound data were correlated with the anthropometric, clinical, and biochemical parameters, as well as with the areas measured by abdominal CT. RESULTS: Intra-abdominal thickness was the variable for which the correlation with the areas of abdominal fat was strongest (i.e., the correlation coefficient was highest). We also tested the reproducibility of ultrasound and CT for the assessment of abdominal fat and found that CT measurements of abdominal fat showed greater reproducibility, having higher intraobserver and interobserver reliability than had the ultrasound measurements. There was a significant correlation between ultrasound and CT, with a correlation coefficient of 0.71. CONCLUSION: In the assessment of abdominal fat, the intraobserver and interobserver reliability were greater for CT than for ultrasound, although both methods showed high accuracy and good reproducibility.

Keywords: Abdominal fat; Ultrasonography; Computed tomography; Radiology.

The rupture of an abdominal aortic aneurysm (AAA) is considered a high-risk surgical emergency, given the catastrophic consequences and high mortality rate. The objective of this pictorial essay is to illustrate the radiological signs that indicate rupture or imminent rupture. To that end, we describe cases treated at our facility and present a brief review of the literature on the topic. The clinical diagnosis of imminent AAA rupture can be difficult, because patients are usually asymptomatic or have nonspecific pain complaints. In the subsequent follow-up, it is possible to identify radiological signs that indicate instability or rupture itself and thus change the prognosis. Computed tomography is the modality of choice for evaluating an AAA and abdominal pain in the emergency setting. It is therefore essential that the radiologist immediately identify the imaging findings that indicate AAA rupture or the imminent risk of such rupture.

Keywords: Aortic aneurysm, abdominal/complications; Aortic aneurysm, abdominal/mortality; Aortic rupture/diagnostic imaging; Abdominal pain/diagnostic imaging; Tomography, X-ray computed/methods.