PURPOSE: To describe the sonographic (US) appearances of endometriomas developed in the vicinity of a scar from Cesarean section and compare sonographic and clinical characteristics of large (> or =3 cm) scar endometriomas (LSEs) with small scar endometriomas (SSEs). METHOD: Twenty-eight consecutive women (mean age, 31 years; range, 20-42) with ...

To evaluate which factor is involved in limiting ultrasound (US)-guided radiofrequency (RF) ablation of small renal masses. Twenty-five patients with 31 renal masses underwent image-guided RF ablation. If a lesion was visible on US, US-guided RF ablation was performed. If a lesion was invisible on US or if the lesion ...

OBJECTIVE: To evaluate radiofrequency (RF) efficiency and safety for the ablation of retained placenta in humans, using a pregnant sheep model. DESIGN: Experimental study. SETTING: Laboratory of Surgery School, Nancy, France. POPULATION/SAMPLE: Three pregnant ewes/ten human placentas. METHODS: Various RF procedures were tested in pregnant ewes on 50 placentomes (individual ...

BACKGROUND: "Perspective-filet view" is a novel three-dimensional (3D) viewing technique for computed tomography colonography (CTC). Studies with experienced readers have shown a sensitivity for perspective-filet view similar to that of 2D or 3D endoluminal fly-through in detection of colorectal lesions. It is not known whether perspective-filet view, compared to axial ...

OBJECTIVE: The purpose of this series was to evaluate the value of contrast-enhanced ultrasonography (CEUS) in the characterization of focal liver lesions (FLLs) in patients with glycogen storage diseases (GSDs). METHODS: Contrast-enhanced ultrasonographic data obtained for characterization of 8 FLLs (size, 0.9-10.2 cm) in 2 patients with GSD type Ia ...

Functional evaluation of bifurcation lesions is more difficult than usual lesions due to their complex anatomy. Angiographic and intravascular ultrasound criteria for main branch intervention cannot be directly applied to side branch lesions due to the difference in underlying lesion characteristics, geometric changes during intervention, and the size of myocardial ...

OBJECTIVE: Data remain sparse to guide the use of targeted sonography for suspicious breast lesions found with MRI. The purpose of our study was to determine the usefulness of sonography in this setting. MATERIALS AND METHODS: Retrospective review of our breast MRI database was performed to identify all nonpalpable, mammographically ...

OBJECTIVE: We investigated the ability of contrast-enhanced ultrasonography with SonoVue (Bracco SpA, Milan, Italy), a sulfur hexafluoride microbubble contrast agent, to reveal differences between benign and malignant focal splenic lesions. METHODS: In a prospective study we investigated 35 lesions in 35 patients (24 male and 11 female; mean age +/- ...

OBJECTIVE: The purpose of this study was to evaluate the diagnostic performance of conventional sonography combined with sonographic elastography for differentiation between benign and malignant breast lesions and to assess the diagnostic performance with two types of interpretation criteria for sonographic elastography. METHODS: For this study, we included 281 lesions ...

We present the correlation between radiologic and pathologic findings in HCC patients who underwent radioembolization with yttrium-90 ((90)Y) microspheres prior to resection or transplantation. Thirty-five patients with a total of 38 lesions who underwent liver explantation after (90)Y radioembolization were studied. Imaging surrogates following treatment were evaluated; the explants were ...

Aortocaval fistula (ACF) is a rare, life threatening complication of abdominal aortic aneurysms. Time to diagnosis is crucial as preoperative diagnosis and early surgical intervention significantly improve the outcome. The clinical spectrum being varied, the challenge of prompt and reliable diagnosis rests on emergency radiology. While the gold standard for ...

BACKGROUND: The aim of this study was to reevaluate the clinical significance of sonographic appearances, in particular the application of color Doppler ultrasound imaging, in discriminating peripheral air-fluid lung abscess from empyema. METHODS: We retrospectively studied patients who had had peripheral air-fluid lesions due to empyema or lung abscess and ...

Contrast-enhanced ultrasound using Sonazoid, a novel contrast medium with a liver-specific Kupffer phase, was evaluated in canine focal liver lesions Twenty-five dogs with a liver mass were given intravenous Sonazoid, and the enhancement pattern in the arterial, portal, and parenchymal phase was characterized. An enhancement defect in the lesion in ...

Contrast-enhanced ultrasound (CEUS) represents a significant breakthrough in sonography and it is being increasingly used for the evaluation of focal liver lesions (FLLs). The unique feature of CEUS of non-invasively assessing in real-time liver perfusion throughout the vascular phase has led to a dramatic improvement in diagnostic accuracy of US ...

BACKGROUND: A randomized prospective trial of marrow-versus-steroids treatment of solitary bone cyst was ongoing. Protocol required contrast injection of the cyst. A subpopulation was noted to have large, rapid venous outflow of contrast material (omnipaque). Central embolization and resultant acute respiratory distress syndrome has been reported with bone marrow transplant. ...

AIMS: We compared a newly developed irrigated gold tip electrode ablation catheter and a gold tip 4 and 8 mm catheter with the corresponding platinum-iridium (Pt) tip catheters in an in vitro setting. METHODS AND RESULTS: In a flow chamber simulating physiological flow conditions, radiofrequency catheter ablation was performed on ...

A quantitative systematic review was performed to estimate the accuracy ultrasonography with color Doppler in the diagnosis of ovarian tumors. Studies that compared color Doppler ultrasonography with paraffin-embedded sections parameters for the diagnosis of ovarian tumors were included. Twelve studies were analyzed, which included 2398 women. The pooled sensitivity was ...

AIMS: Complete tumour cell death is necessary for any ablative technique to be successful. Microwave tissue ablation (MTA), radiofrequency (RF) and cryotherapy (CT) are three methods of destroying liver tumours in situ. Unlike MTA, RF and CT rely on conduction of the thermal insult for their cytotoxicity, potentially affecting lesion ...

OBJECTIVE: Diagnosis of malignancy and prognostic assessment continue to be problems in the management of nonfunctioning pancreatic endocrine tumors. Histologic examination is the reference standard. The aim of our study was to compare B-mode and contrast-enhanced sonographic findings regarding nonfunctioning pancreatic endocrine tumors. Signs of malignancy, such as Ki67 index ...

BACKGROUND AND OBJECTIVE: Differential diagnosis of malignant solitary pulmonary nodules (SPNs) from benign ones is difficult based on imaging manifestations. This study was to assess dynamic enhancement patterns of SPNs detected with multi-detector row computed tomography (MDCT), correlate SPN manifestations of MDCT to the expression of vascular endothelial growth factor ...

The objective was to evaluate whether the echogenicity of focal liver lesions (FLLs) on baseline gray-scale ultrasound (US) interferes with the diagnostic performance of contrast-enhanced US (CEUS) for small FLLs. Three-hundred and eighty-eight patients were examined by real-time CEUS using a sulfur hexafluoride-filled microbubble contrast agent. The images of 114 ...

PURPOSE: We describe the use of a novel bipolar radiofrequency (RF) system for the destruction of prostate tissue in an ex vivo model. MATERIALS AND METHODS: A bipolar RF delivery system (Trod Medical, France) was linked to a 500 kHz generator. Eight lesions were created in an ex vivo bull ...

OBJECTIVE: To determine the validity of pulsatility and resistance index of transabdominal Doppler ultrasound (e-flow) in distinguishing between benign and malignant adnexal masses. METHODS: A cross-sectional descriptive study was conducted on patients scheduled for elective surgery due to adnexal masses at Maharaj Nakorn Chiang Mai Hospital, Thailand, between April 2006 ...

The purpose of this study was to identify clinical and ultrasound (US) features of malignancy in patients using cytological results of follicular neoplasm (FN) in the thyroid. We followed 165 patients with cytology diagnosed FN and evaluated the final surgical histopathology outcomes in 114 patients between March 2006 and November ...

BACKGROUND: There have recently been increasing case reports in the literature of deep brain stimulation (DBS) electrodes used for lesioning with satisfactory clinical success in the treatment of Parkinson disease and tremor. METHODS: After preliminary experiments of radiofrequency (RF) lesioning with a quadripolar DBS lead, a paediatric case of generalized ...

PURPOSE: Our aim was to evaluate the relationship between lesion volume, serum level of biochemical markers, and clinical situation in ischemic and hemorrhagic stroke. METHODS: MRI was obtained on 33 ischemic and 28 hemorrhagic strokes. The Cavalieri method was used to measure the volume. To evaluate neurological situation of the ...

OBJECTIVE: To compare diagnostic performance of gray-scale ultrasound and combined gray-scale ultrasound with color Doppler ultrasound in predicting malignancy of thyroid nodules by using tissue diagnosis as the reference standard. DESIGN: Diagnostic test with prospective data collection. MATERIALS AND METHODS: Between November 2007 and October 2008, 31 patients (16 with ...

OBJECTIVES: To evaluate the efficacy of ultrasonography and colour and power Doppler ultrasonography for diagnosis of intraosseous lesions of the jaws and to correlate the contents of the lesion with the histological findings. METHODS: This study included 20 patients referred to the oral surgery clinic for treatment. All patients had ...

To clarify the validity of the evaluation of the hemodynamics of hepatic lesions < or =20 mm in diameter using contrast-enhanced ultrasonography (CE-US) with Sonazoid. Sixty-two hepatic lesions in 55 patients with chronic hepatitis or cirrhosis due to hepatitis C virus were studied. We evaluated by quantitative analysis the time ...

The use of contrast enhancers has widened the possibilities of sonographic imaging, and allows the differentiation of characteristic enhancement patterns leading to diagnosis in focal liver lesions. The aim of our study was to evaluate contrast ultrasound signs in diagnosing malignant liver lesions. 86 patients with 100 solid liver lesions ...

AIMS: Encircling ablation of the right and left pulmonary venous antra is commonly practiced. The importance to procedure outcome of electrical isolation of unablated myocardium enclosed by the encircling lesions is increasingly clear. The safe and effective achievement of isolation is dependent on a thorough comprehension of the 'electroanatomic' ablation ...

To evaluate ability of ferucarbotran-enhanced MR imaging (MRI) in differentiating metastases from nonsolid benign lesions of the liver according to signal-intensity characteristics. Sixty-six consecutive patients, who had 138 focal hepatic lesions (26 cysts, 11 hemangiomas, and 101 metastases), underwent ferucarbotran-enhanced MRI. The signal-intensity pattern of each kind of lesion relative ...

OBJECTIVE: The objective of our study was to intraindividually compare 0.1 mmol/kg doses of gadobenate dimeglumine and gadopentetate dimeglumine for contrast-enhanced breast MRI. SUBJECTS AND METHODS: Forty-seven women (mean age +/- SD, 50.8 +/- 12.9 years) with breast lesions classified as BI-RADS category 3, 4, or 5 for suspicion of ...

PURPOSE: To investigate the vascular characteristics of focal fatty infiltration (FFI) in the liver using color Doppler sonography (CDUS) and contrast-enhanced sonography (CEUS). METHODS: We prospectively examined 25 areas of FFI of the liver in 20 patients via conventional gray-scale sonography, CDUS, and CEUS. Cadence contrast pulse sequencing and the ...

OBJECTIVE: Stereotactic radiosurgery is a commonly used treatment method in the management of metastatic brain tumors. When lesions enlarge after radiosurgery, it may represent tumor regrowth, radiation necrosis, or both. The purpose of this study was to determine whether standard magnetic resonance imaging (MRI) sequences could reliably distinguish between these ...

The aim of this study was to compare the enhancement pattern of intrahepatic cholangiocarcinoma (ICC) on contrast-enhanced ultrasound (CEUS) with that on contrast-enhanced computed tomography (CECT). 40 pathologically proven ICC lesions in 40 patients were evaluated retrospectively with both CEUS and CECT. The enhancement level and pattern in the dynamic ...

OBJECTIVE: The purpose of the study was to determine if color Doppler ultrasonographic (US) quantitative flow parameters are valuable to differentiate malignant peritoneal or omental involvement from benign causes. MATERIALS AND METHODS: Twenty-six consecutive patients with peritoneal or omental thickening detected by gray scale US, computed tomography, and magnetic resonance ...

PURPOSE: To test the feasibility and efficacy of a percutaneous sonographically guided high-intensity interstitial ultrasound (US) ablation applicator to create "macrolesions" of confluent coagulation in an in vivo pig liver model. MATERIALS AND METHODS: Eight pigs and an interstitial US ablation applicator were used for this study. Elementary lesions and ...

BACKGROUND: This study was undertaken to analyze the clinical and CT features of arteriovenous malformation (AVM) of the pancreas. METHODS: Seven lesions in six consecutive patients (one woman and five men, mean age 51 years) with AVM of the pancreas who underwent multiphase contrast-enhanced CT with 0.5 or 1-mm collimation ...

Conventionally, tumour vascularity is assessed invasively by immunofluorescent analysis. Quantified contrast-enhanced power Doppler ultrasound has been used to measure tumour angiogenesis non-invasively in humans and experimental animals. The purpose of this study was to correlate quantified contrast-enhanced power Doppler ultrasound with immunofluorescent results in 45 spontaneous canine tumours. With power ...

PURPOSE: To compare lesion conspicuity and image quality between single-shot spin echo echo planar imaging (SS SE-EPI) before, immediately and 5min after intravenous (IV) injection of superparamagnetic iron oxide (SPIO) for detecting and characterizing focal liver lesions (FLLs). MATERIALS AND METHODS: Twenty-five patients suspected for colorectal liver metastases were prospectively ...

High resolution ultrasound (HR-US) including color Doppler ultrasound (CD-US), power Doppler ultrasound (PD-US), and spectral wave analysis (SWA), is a broadly available, non-invasive and relatively low-cost modality without ionizing radiation. It is increasingly used for initial assessment of an ambiguous musculoskeletal soft-tissue lesion and for sonographically guided core biopsy. The ...

Spontaneous necrosis of hepatocellular carcinoma (HCC) is rare. We report the case of a 72-year-old woman with an HCC nodule that underwent necrosis after sonographically guided needle biopsy. Baseline sonographic examination revealed only a nonspecific change in the echogenicity of the lesion. Subsequent necrosis was suggested on contrast-enhanced sonographic examination ...

Production of complete (i.e. continuous and transmural) cardiac lesions by radiofrequency (RF) ablation can cure certain cardiac arrhythmias. However, a predictor of lesion completeness that is reliable and can be measured intraoperatively is needed in order to maximize effectiveness of ablation therapy. Predictors that require membrane excitation or response to ...

The aim was to examine the efficacy of contrast-enhanced ultrasound (US) with Sonazoid to demonstrate ultrasonically unrecognizable hypervascular hepatocellular carcinoma (HCC) and apply percutaneous US-guided treatments. The subjects of this prospective study were 44 cirrhotic patients with 55 hypervascular lesions (12.7+/-4.5 mm) found by contrast-enhanced computed tomography but unrecognized by ...

Angiolymphoid hyperplasia with eosinophilia is an uncommon benign condition characterized by cutaneous nodules involving primarily the head and neck regions of young adults. We report thecase of a 49-year-old woman with such a lesion in the arm. Sonographically, the lesion exhibited a hypoechoic rim and an echogenic central portion. On ...

BACKGROUND: Laser-induced fluorescence diagnostics (LIFE) can be used as an imaging system of precancerous and neoplasmatic lesions of oral mucosa. LIFE system utilizes healthy and neoplasmatically changed tissue in autofluorescence, without using any fluorescence substances. Neoplasmatic lesions are visible in pseudo colors, healthy tissue as a shade of green color ...

We report the histological evaluation of both endocardial and epicardial radiofrequency (RF) ablation lesions in the explanted heart of a patient presenting with nonischemic dilated cardiomyopathy complicated by recurrent electrical storms. In this case, chronic RF lesions were almost transmural at the endocardial side, while remaining only superficial at the ...

OBJECTIVE: Dysembryoplastic neuroepithelial tumor (DNT) occurs rarely in the cerebellum. We describe a rare case of cerebellar DNT that developed contrast enhancement after long-term observation and discuss the underlying mechanism and clinical relevance of this unusual phenomenon. CLINICAL PRESENTATION: A 34-year-old woman with known cystic cerebellar lesions presented with increased ...

AIM: The aim of this study was to report the role of duplex scanning in selection of patients with lower limb ischemia for infrainguinal endovascular revascularization. METHODS: From January 2002 to December 2005, 95 patients (66 male, 29 female) underwent infrainguinal endovascular revascularization based on duplex scanning. The indications for ...