Multi-color gold-nanoparticle-based tags (nanotags) are synthesized for combined surface-enhanced Raman spectroscopy (SERS) and x-ray computed tomography (CT). The nanotags are synthesized with quasi-spherical gold nanoparticles encoded with a reporter dye (color), each with a unique Raman spectrum. A library of nanotags with six different colors were synthesized for a range ...

BACKGROUND: The aim of this study was to validate a novel method of determining vena contracta area (VCA) and quantifying mitral regurgitation using multibeam high-pulse repetition frequency (HPRF) color Doppler. METHODS: The Doppler signal was isolated from the regurgitant jet, and VCA was found by summing the Doppler power from ...

INTRODUCTION: The frequency of perforator flap surgery is increasing. As such, the claim to identify and localize the perforators is closely related to preoperative perforator imaging. Starting with Doppler sonography magnetic resonance imaging (MRI) followed early in the 90s. Recently, three- and four-dimensional computer tomographic angiography and venography present impressive ...

PURPOSE: To evaluate the reliability of 16-slice multidetector computed tomographic (MDCT) angiography for the preoperative morphologic assessment of coarctation of the aorta in adults. MATERIALS AND METHODS: Twenty-four adult patients with clinical suspicion of coarctation of the aorta who underwent both Doppler echocardiography and MDCT angiography were included in this ...

AIM: To determine the clinical usefulness of Doppler ultrasonography in the diagnosis of the Nutcracker phenomenon, as an alternative to computed tomographic scans (CT). METHODS: This study consisted of 52 patients that presented with intermittent hematuria of unknown origin between January 2006 to April 2008. Doppler ultrasonography was used to ...

PURPOSE: To establish optimal Doppler ultrasonographic (US) venous pulsatility index and computed tomographic (CT) criteria for right hepatic vein (RHV) stenosis after living donor liver transplantation (LDLT) and to compare accuracies of these methods by using receiver operating characteristic (ROC) analysis. MATERIALS AND METHODS: This retrospective study was approved by ...

OBJECTIVES: The aim of this study was to evaluate feasibility and accuracy of real-time 3-dimensional (3D) echocardiography for quantification of mitral regurgitation (MR), in a head-to-head comparison with velocity-encoded cardiac magnetic resonance (VE-CMR). BACKGROUND: Accurate grading of MR severity is crucial for appropriate patient management but remains challenging. VE-CMR with ...

PURPOSE: We examined the spatial factors influencing magnetic resonance (MR) flow velocity measurements in a small tube phantom and used the same measurements obtained with an intraluminal Doppler guidewire as reference. MATERIALS AND METHODS: We generated constant flow velocities from approximately 40 to 370 cm/s in a tube 4 mm ...

Haematomas are common and sarcomas are rare. However the absence of trauma or a light trauma should alert the clinician to the possibility that the abnormality may represent haemorrhage into a tumor and not just haematoma, even in a haemophilic patient. Clinical findings, sonography with Doppler assessment and magnetic resonance ...

OBJECTIVE: The aim of this study was to evaluate the hemodynamics of gastric varices using transabdominal color Doppler ultrasonography (CDUS). METHODS: Using CDUS, we evaluated 41 consecutive patients with gastric varices. We examined color flow images and measured the velocity of gastric variceal blood flow using fast Fourier transform analysis. ...

OBJECTIVE: The objective of our study was to compare CT and Doppler ultrasound in the diagnosis of hepatic outflow obstruction at the middle hepatic vein (MHV) tributaries and inferior right hepatic veins (RHVs) after living donor liver transplantation (LDLT) with modified right lobe grafts. MATERIALS AND METHODS: Thirty-seven venographies were ...

Hepatic portal venous gas (HPVG), an ominous radiologic sign, is associated in some cases with a severe underlying abdominal disease requiring urgent operative intervention. HPVG has been reported with increasing frequency in medical literature and usually accompanies severe or lethal conditions. The diagnosis of HPVG is usually made by plain ...

OBJECTIVE: We aimed to compare the diagnostic performance of transvaginal sonography (TVS), magnetic resonance imaging (MRI), and intraoperative frozen section in the assessment of myometrial invasion and to evaluate intratumoral blood flow in any myometrial invasion with transvaginal Color Doppler ultrasonography (TV-CDU). METHODS: This prospective study included 64 women consecutively ...

BACKGROUND AND PURPOSE: Brain imaging abnormalities were reported in up to 44% of children with sickle cell disease (SCD). The prevalence of neuroimaging abnormalities in adult patients with SCD and their relationship to transcranial Doppler is still unclear. Our objectives were to study the frequency of MRI and MR angiography ...

We report the first utilization of time-resolved three-dimensional phase contrast magnetic resonance imaging, termed 4D flow, to image a type I endoleak after endovascular aneurysm repair. The combination of 4D flow and a traditional magnetic resonance angiogram can aid in the accurate detection and characterization of endoleaks by combining the ...

Endomyocardial fibrosis (EMF) is a rare progressive restrictive cardiomyopathy of unknown etiology that mainly presents with heart failure. The presence of a small ventricle with obliteration of the apex and a large atrium are two-dimensional echocardiographic findings that are highly suggestive of EMF. Cardiac magnetic resonance with delayed enhancement allows ...

PURPOSE: To evaluate differences in velocity and flow measurements in the aorta between accelerated phase-contrast (PC) magnetic resonance imaging (MRI) using SENSE and k-t BLAST and in peak velocity to Doppler ultrasound. MATERIALS AND METHODS: Two-dimensional PC-MRI perpendicular to the ascending and descending aorta was performed in 11 volunteers using ...

Doppler ultrasound is an important diagnostic tool for detecting hepatic vascular abnormalities, especially following liver transplantation. Doppler ultrasound has an advantage over computed tomography or other imaging modalities in that it is noninvasive, can be used intraoperatively or immediately postoperatively at the patient's bedside, and is free from radiation hazard. ...

OBJECTIVE: To assess the role of three-dimensional (3D) power Doppler in the antenatal diagnosis of placenta accreta and compare its diagnostic performance with gray-scale and color Doppler ultrasonography. METHODS: One hundred and seventy pregnant women with persistent placenta previa totalis (after 28 weeks' gestation) were prospectively enrolled into this study. ...

The aim of this study was to investigate the agreement between diagnoses of calcified atheroma seen on panoramic radiographs and color Doppler images. Our interest stems from the fact that panoramic images can show the presence of atheroma regardless of the level of obstruction detected by color Doppler images. Panoramic ...

Multicolor fluorescence in situ hybridization (M-FISH) techniques provide color karyotyping that allows simultaneous analysis of numerical and structural abnormalities of whole human chromosomes. Chromosomes are stained combinatorially in M-FISH. By analyzing the intensity combinations of each pixel, all chromosome pixels in an image are classified. Due to the overlap of ...

Ultrasound is the preferred imaging modality in diagnosis of vascular complications following cardiac catheterization and intervention. In some cases, however, bleeding surrounding the femoral vessels, may severely distort the color Doppler images, making detection of venous complications especially difficult. This report refers to such a case where post-catheterization haematoma was ...

A microarray-based method for detecting single nucleotide polymorphisms (SNPs) using solid-phase polymerase chain reaction (PCR) on magnetic nanoparticles (MNPs) was developed. In this method one primer with a biotin label is captured by streptavidin-coated MNPs (SA-MNPs), and the PCR products are directly amplified on the surface of SA-MNPs in a ...

BACKGROUND: In clinical practice, mitral regurgitation (MR) is often assessed from the visual impression of the color Doppler image. It is recognized that repeated scanning can give different images and that different observers may grade the same images differently. In this study, we focus on a more intrinsic source of ...

OBJECTIVE: The workup of endometrial abnormalities can be a confusing task for radiologists because one must take into account the patient's clinical history, imaging findings, and a wide array of diagnostic options. We present two cases, one of a premenopausal woman presenting with vaginal bleeding and another of a postmenopausal ...

OBJECTIVES: Our goal was to prospectively compare the accuracy of real-time three-dimensional (3D) color Doppler vena contracta (VC) area and two-dimensional (2D) VC diameter in an in vitro model and in the clinical assessment of mitral regurgitation (MR) severity. BACKGROUND: Real-time 3D color Doppler allows direct measurement of VC area ...

This correspondence presents a novel hybrid Color and Frequency Features (CFF) method for face recognition. The CFF method, which applies an Enhanced Fisher Model (EFM), extracts the complementary frequency features in a new hybrid color space for improving face recognition performance. The new color space, the RIQ color space, which ...

The aim of this study is to investigate the tissue Doppler echocardiographic (TDE) characteristics of acute familial Mediterranean fever (FMF) attack on young Turkish males. Thirty-four young males with FMF were investigated utilizing echocardiography both before and after FMF attacks. Echocardiographic findings were assessed by two cardiologist utilizing Vingmed system ...

OBJECTIVE: The purpose of this series is to emphasize the importance of an exhaustive and appropriately conducted sonographic examination in the correct diagnosis of fetal cystic scalp lesions and the place of magnetic resonance imaging (MRI) in the diagnostic sequence. METHODS: Transabdominal and transvaginal 2- and 3-dimensional sonography with color ...

The use of Doppler ultrasound in rheumatology has grown in recent years. This is partly due to the increasing number of rheumatologists who perform US in their daily clinical practise and also to the technological advances of US systems. Both colour Doppler and power Doppler are used to evaluate the ...

Acute nontraumatic scrotum represents one of the most important emergencies in the male population. Etiology of the acute scrotum greatly varies, but the most common causes include testicular torsion and inflammatory disease. Currently, the most successful diagnostic imaging is ultrasound integrated by the application of color power Doppler. A very ...

Institutional review board approval and informed consent were obtained. This study was conducted to evaluate a newly developed technique for discriminative color coding of tagged stool during three-dimensional (3D) endoluminal fly-through computed tomographic (CT) colonography and to determine its effect on reading efficiency. Thirty patients, including three dropouts, were prepared ...

Colour has been shown to facilitate the recognition of scene images, but only when these images contain natural scenes, for which colour is 'diagnostic'. Here we investigate whether colour can also facilitate memory for scene images, and whether this would hold for natural scenes in particular. In the first experiment ...

A 21-year-old man presented with an enlarged giant hemangioma on glans penis which also causes an erectile dysfunction (ED) that partially responded to the intracavernous injection stimulation test. Although the findings in magnetic resonance imaging (MRI) indicated a glandular hemangioma, penile colored Doppler ultrasound revealed an invaded cavernausal hemangioma to ...

OBJECTIVE: The purpose of our study was to determine the efficacy of contrast-enhanced CT in detecting a thickened endometrium. We used transvaginal sonography as the reference standard. MATERIALS AND METHODS: Between March 2005 and January 2007, data from 259 patients (mean age, 47 years; age range, 18-90 years) who underwent ...

Brain (B-type) natriuretic peptide (BNP) and tissue Doppler imaging may distinguish restrictive cardiomyopathy (RCMP) from idiopathic constrictive pericardial disease (CP). However, their comparative efficacy is unknown for patients with CP from secondary causes (e.g., surgery or radiotherapy). We compared the efficacy of tissue Doppler imaging and BNP for differentiation of ...

A digital image analysis method previously used to evaluate leaf color changes due to nutritional changes was modified to measure the severity of several foliar fungal diseases. Images captured with a flatbed scanner or digital camera were analyzed with a freely available software package, Scion Image, to measure changes in ...

BACKGROUND: Vena contracta width (VCW) as an estimate of effective regurgitant orifice area (EROA) is an accepted parameter of mitral regurgitation (MR) severity. However, uncertainty exists in cases in which VCW at the same time appears narrow in 4-chamber (4CH) view and broad in 2-chamber (2CH) view as common in ...

PURPOSE: The amount of colour Doppler activity in the inflamed synovium is used to quantify inflammatory activity. The measurements may vary due to image selection, quantification method, and point in cardiac cycle. This study investigated the test-retest reliability of ultrasound colour Doppler measurements in the wrist of patients with rheumatoid ...

BACKGROUND: Multidetector-row computed tomography (MDCT) has been recently introduced to detect the perforator vessels. The aim of this study is to compare the MDCT with Doppler ultrasound and assess the usefulness of the MDCT for the preoperative planning. METHODS: Five healthy adult men were first assessed for the perforators and ...

The aim of this study was to evaluate the feasibility of clinical application of infrared thermography (IRT) in the pediatric population and to identify pathological states that can be diagnosed as well as followed up using this non-invasive technique. In real time computer-assisted IRT, 483 examinations were performed over a ...

To evaluate the fully automated FACSCanto software, we compared lymphocyte subpopulation counts obtained using three-color FACSCalibur-CELLQuest and six-color FACSCanto-FACSCanto software techniques. High correlations were observed between data obtained with these techniques. Our study indicated that FACSCanto clinical software is accurate and sensitive in single-platform lymphocyte immunophenotyping.

Although the primary cause of constrictive pericarditis is entirely different to that of restrictive cardiomyopathy, the two often present with very similar clinical findings. As such, making the distinction between the two is a diagnostic challenge. We report a case that highlights how tissue Doppler imaging may simplify the distinction ...

BACKGROUND: The present study aimed to investigate the role of stavudine in the onset of premature vascular lesions using an ultrasound color Doppler evaluation of the carotid vessels. PATIENTS AND METHODS: A total of 266 patients were evaluated: 149 were treated with stavudine (group I) and 117 without stavudine (group ...

BACKGROUND: The aim of the present study was to compare two confirmatory tests - the 'swoosh' test (auscultation during caudal injection) and real time ultrasound imaging (both transverse 2D imaging and color flow Doppler imaging) in pediatric patients receiving a caudal epidural block. METHODS/MATERIALS: This was a retrospective observational study ...

OBJECTIVE: To assess the use of contrast-enhanced color Doppler imaging (CDI), computed tomography (CT), and magnetic resonance imaging (MRI) for the detection of crossing vessels at the ureteropelvic junction (UPJ) in patients with ureteropelvic junction obstruction (UPJO). MATERIALS AND METHODS: Forty-eight patients aged 18-69 yr (mean age, 52) who had ...

OBJECTIVES: Current guidelines still recommend transesophageal echocardiography (TEE) as reference method to diagnose interatrial shunts. The aim was to test the accuracy of high-end transthoracal echocardiography (TTE) to exclude inter-atrial shunts. METHODS: Prospective TTE and TEE study with second harmonic imaging to determine left-to-right shunt (L/R) by both colour Doppler ...

Strain and strain rate deformation parameters based on Color Doppler Myocardial Imaging, and more recently on two-dimensional (2D) gray scale images, have evolved as important methods for the quantification of myocardial function. Although these parameters are already applicable in the research field, their acquisition and analysis involve a number of ...

The purpose of this study was to compare the value of pelvic ultrasound with color Doppler and magnetic resonance imaging (MRI) in: (1) the diagnosis of placental adhesive disorders (PADs), (2) the definition of the degree of placenta invasiveness, (3) determining the topographic correlation between the diagnostic images and the ...

Renal arteriovenous fistula (AVF) is an uncommon clinical entity, which can be congenital, acquired, or idiopathic. Diagnosis is aided by radiological studies, with digital subtraction angiography as a gold standard. However, Doppler ultrasound with color Doppler interrogation and computed tomography (CT) angiography are alternative imaging techniques that are noninvasive and ...