Ayşe Erden

Marked increase in flow velocities during deep expiration: A duplex doppler sign of celiac artery compression syndrome

Symptoms of chronic mesenteric ischemia develop when the celiac artery is constricted by the median arcuate ligament of the dia- . phragm. Lateral aortography is the primary modality for diagnosing ligamentous compression of the celiac artery. However, duplex Doppler sonography performed during deep expiration can cause a : marked increase in flow velocities at the compressed region of the celiac artery and suggest the diagnosis of celiac arterial constriction due to the diaphragmatic ligament.

Congenital Variants and Anomalies of the Pancreas and Pancreatic Duct: Imaging by Magnetic Resonance Cholangiopancreaticography and Multidetector Computed Tomography

Though congenital anomalies of the pancreas and pancreatic duct are relatively uncommon and they are often discovered as an incidental finding in asymptomatic patients, some of these anomalies may lead to various clinical symptoms such as recurrent abdominal pain, nausea and vomiting. Recognition of these anomalies is important because these anomalies may be a surgically correctable cause of recurrent pancreatitis or the cause of gastric outlet obstruction. An awareness of these anomalies may help in surgical planning and prevent inadvertent ductal injury. The purpose of this article is to review normal pancreatic embryology, the appearance of ductal anatomic variants and developmental anomalies of the pancreas, with emphasis on magnetic resonance cholangiopancreaticography and multidetector computed tomography.

Severe portal hypertension due to congenital hepatoportal arteriovenous fistula associated with intrahepatic portal vein aneurysm.

A 13‐year‐old girl was referred for assessment of severe gastrointestinal tract bleeding. Her liver function tests were normal, and she had no evidence of chronic liver disease or history of significant trauma. Clinical and sonographic findings suggested the presence of a portal vein aneurysm associated with a hepatoportal arteriovenous fistula. Abdominal angiography confirmed the diagnosis. The arteriovenous fistula was congenital, and the associated portal vein aneurysm was either congenital or secondary to hemodynamic changes in the portal venous system.

Superior mesenteric artery Doppler waveform changes in response to inflammation of the ileocecal region

Abstract. In the present study, we determined how Doppler waveforms of the superior mesenteric artery (SMA) are affected by inflammatory processes in the ileocecal region. Twenty-two patients (aged 20–69 years) with ileocecal region inflammation (ICRI) were examined with duplex Doppler Ultrasonography to establish whether any significant changes were present in the mean blood flow parameters of peak systolic velocity (PSV), end-diastolic velocity (EDV), resistive index, pulsatility index, blood flow volume, and diameter of the SMA. The findings were compared with those of 22 volunteer controls. Mean blood flow volume in the SMA in patients with ICRI (1.128 ± 0.43 L/min) was significantly greater (p < 0.001) than that in the control group (0.643 ± 0.19 L/min). The mean PSV (1.87 ± 0.44 m/s) and the mean EDV (0.31 ± 0.18 m/s) were also significantly (p < 0.01) higher than those of the means in healthy subjects (mean PSV = 1.44 ± 0.26 m/s and mean EDV = 0.20 ± 0.05 m/s). ICRI, regardless of cause, increases both the flow velocities in the SMA and the flow volume to the SMA territory.

Post-traumatic intrasplenic pseudoaneurysms with delayed rupture: color Doppler sonographic and CT findings.

Post‐traumatic intrasplenic pseudoaneurysms are very rare in children. Since pseudoaneurysms may expand a splenic hematoma and cause delayed splenic rupture, early diagnosis and treatment are crucial. In this report, we describe the case of a 12‐year‐old boy with a delayed splenic rupture caused by a splenic hematoma containing 2 pseudoaneurysms. Abdominal sonography showed free intraperitoneal fluid and a mildly enlarged spleen with a large heterogeneous area occupying the upper half of the organ. Two anechoic lesions (15 and 4 mm) were seen inside the hematoma near the splenic hilum. Color Doppler sonography demonstrated turbulent arterial flow within the lesions, suggesting pseudoaneurysms. On CT, the lesions enhanced simultaneously with the splenic artery in the arterial phase of contrast enhancement. CT also showed an intrasplenic arterial branch leading to the larger of the 2 pseudoaneurysms.

Imaging features of portal biliopathy: Frequency of involvement patterns with emphasis on MRCP

PURPOSE To investigate the imaging features of portal biliopathy with emphasis on MR cholangiopancreatography (MRCP). The ancillary vascular findings of portal biliopathy were also evaluated by accompanying MR portography, dynamic contrast-enhanced (CE) CT, and dynamic CE MRI studies. MATERIALS AND METHODS Sixteen patients with portal cavernoma were included in the study. Patients had undergone MRCP (n=16) studies accompanied by MR portography (n=13), dynamic CE CT (n=3) or dynamic CE MRI (n=2) of the liver. Two patients had undergone both dynamic CE CT and dynamic CE MRI. Two radiologists evaluated all the examinations together, retrospectively. MRCP images were analyzed for the presence of biliary stenosis, upstream (prestenotic) dilatation, wavy appearance of the bile ducts, angulation of the common bile duct (CBD), and choledocholithiasis. MR portography, dynamic CE CT and dynamic CE MRI studies were evaluated for the existence of portal cavernomas, and the presence of gall bladder/choledochal varices. RESULTS All patients had signs of portal biliopathy on MRCP. Frequencies of the biliary findings on MRCP were as follows: biliary stenosis, 93.7%; upstream dilatation, 68.7%; wavy appearance of the biliary tree, 87.5%; angulation of the CBD, 75%. None of the patients had choledocholithiasis. Frequencies of the ancillary vascular findings detected on CE studies were as follows: gall bladder varices, 100%, choledochal varices, 93.7%. CONCLUSION MRCP features of portal biliopathy in order to their frequencies were as follows: biliary stenosis, wavy appearance of the bile ducts, angulation of the CBD, and upstream dilatation of the bile ducts.

MR peritoneography in complications of continuous ambulatory peritoneal dialysis

BackgroundWe evaluated the usefulness of magnetic resonance (MR) peritoneography for the examination of complications from continuous ambulatory peritoneal dialysis (CAPD).MethodsMR peritoneography was performed in 20 patients who had suspected CAPD-related complications. Patients who had active peritonitis were not included in the study. Before MR imaging, a mixture of 2000 mL of peritoneal dialysis solution and 20 mL of gadopentetate dimeglumine was instilled into the peritoneal cavity. MR imaging was performed on a 1.0-Tesla system using a body coil. Axial, coronal, and sagittal fat-saturated fast spoiled gradient echo (repetition/echo times, 100/6.3 ms; flip angle, 90 degrees), axial fat-saturated T2-weighted fast spin echo (repetition/echo times, 6000/107 ms), and coronal fat-saturated T2-weighted fast spin echo (repetition/echo times, 3000/96.2 ms) images of the abdomen and the pelvis were obtained. After drain-age, triplanar fat-saturated fast spoiled gradient echo images were repeated with the same parameters.ResultsHomogeneous distribution of the dialysate in the peritoneal cavity was detected in 18 patients (90%). In 12 patients (60%), fluid leaks were discovered peripheral to the exit site, tunnel, and site of peritoneal entrance of the catheter. Fluid leaks through the abdominal wall in five patients (25%), retroperitoneum in one patient (5%), and a previous operation site in one patient (5%) were demonstrated. No abnormal finding was detected in three patients (15%) who had clinically suspected complications, whereas a dialysate leak was found in two patients (10%) who had no significant finding at physical examination.ConclusionsMR peritoneography provides detailed information about the anatomic distribution of dialysate leaks in patients treated with CAPD and poses no risks associated with ionizing radiation and nephrotoxic contrast medium.

Portal venous system Evaluation with contrast-enhanced 3D MR portography

The purpose of this study is to compare contrast-enhanced three-dimensional (3D) magnetic resonance (MR) portograms to Doppler sonography in detection of portal venous abnormalities. Thirty-five consecutive patients, who were suspected of having portal venous system abnormalities, were examined with MR portography and Doppler sonography. Vascular abnormalities were identified in 27 of 35 patients. There was statistically significant agreement between the results of MR portography and Doppler sonography. The major limitation of contrast-enhanced 3D MR portography was its inability to provide objective hemodynamic data regarding flow direction and flow pattern.

Radiological findings in the diagnosis of genitourinary candidiasis.

Abstract The presence of fungus balls within the collecting system is an important clue to the radiological diagnosis of genitourinary candidiasis. In this report, an 8-month-old infant with this opportunistic infection is described. Emphasis is placed on the radiological findings of renal candidiasis, including previously unreported MR appearances. Sonographic and Doppler findings of accompanying Candida epididymitis are also described.

Intrabiliary Rupture of Hepatic Hydatid Cysts: Diagnostic Accuracy of MR Cholangiopancreatography

OBJECTIVE The purpose of this study was to establish the role of MR cholangiopancreatography (MRCP) in the diagnosis of biliary rupture in hepatic hydatid disease. We sought to determine whether the morphologic features of cysts and bile duct abnormalities detected on MRCP are specific enough for identification of intrabiliary rupture. CONCLUSION If one of the following MRCP findings of apparent connection between hydatid cyst and biliary system, deformation of cyst, focal defect in cyst wall, or beaklike projection extending from cyst wall was present in a patient with hepatic hydatid cyst, the sensitivity of MRCP was 91.7% and the specificity was 82.8% for identification of intrabiliary rupture.