STUDY OBJECTIVE: To ascertain if color Doppler sonography (CDS) can detect viability of adnexa in torsion. DESIGN: Concurrent, nonrandomized study (Canadian Task Force classification II-2). SETTING: Tertiary medical care center in a university hospital. PATIENTS: Twenty-seven women suspected of having torsion of the ovary in which a benign tumor was ...

We aimed to investigate the relationship between varicocele and lactic dehydrogenase (LDH), an intracellular enzyme that indicates cellular damage. LDH levels were measured in the blood samples of 17 oligoasthenospermic infertile patients with varicocele which were obtained synchronously from spermatic and peripheral veins during operation. Sperm counts ranged from 1 ...

The aim of the present study was to establish the usefulness of conventional thyroid ultrasonography (US) and color flow-doppler (CFD) sonography in the assessment of 'cold' thyroid nodules. One hundred and four consecutive patients with thyroid nodules who were to undergo surgery were examined by US and CFD before thyroidectomy. ...

OBJECTIVES: Testicular blood supply and semen quality were compared in two groups of patients undergoing laparoscopic varicocelectomy: group I (n = 27) with spermatic artery ligation and group II (n = 48) with spermatic artery preservation. METHODS: Laparoscopic varicocelectomy was performed on 75 patients divided on the basis of whether ...

Contralateral testicular perfusion during unilateral testicular torsion was evaluated using simultaneous blood flow and O2 content determinations. Two groups, each consisting of 7 rats, were studied. Sham operation or 720 degrees clockwise twisting was performed on the left testes, and blood flow, O2 content and temperatures were monitored in the ...

OBJECTIVE: The aim of this study was to compare the ability of power Doppler sonography and color Doppler sonography to differentiate hepatocellular carcinoma (HCC) from adenomatous hyperplasia (AH). SUBJECTS AND METHODS: In 48 patients with cirrhosis of the liver, color Doppler sonography and power Doppler sonography were performed on 53 ...

Fibular osteocutaneous free tissue transfer represents state-of-the-art reconstruction of the oromandibular complex after oncologic resection. Because the blood supply of the fibular flap is based on the peroneal artery and venae comitantes, it is essential to determine preoperatively whether adequate perfusion to the donor extremity will persist after sacrifice of ...

OBJECTIVES: Color Doppler ultrasound (CDU) diagnostic criteria for varicoceles are poorly defined, and the role of CDU in diagnosing varicoceles is controversial. The purpose of this study is to assess the diagnostic accuracy of CDU for varicoceles compared to physical examination. METHODS: We prospectively studied 64 patients with CDU and ...

PURPOSE: The objective of this prospective study was to evaluate whether Doppler imaging characteristics can be used to predict spontaneous thrombosis of femoral artery pseudoaneurysms (PAs). METHODS: Eleven post-cardiac catheterization PAs were monitored with color Doppler sonography. Total volume of the lesion, volume filled with free-flowing blood, length and width ...

The aim of this paper is to compare the accuracy of color Doppler to compression sonography in the diagnosis of lower extremity deep vein thrombosis. Longitudinal color flow imaging was performed in 60 lower extremities in patients with clinically suspected deep venous thrombosis (DVT). The study was then repeated by ...

OBJECTIVE: To evaluate contralateral testicular blood flow by histological examination of arterioles during ipsilateral testicular torsion. MATERIALS AND METHODS: The study comprised two groups of 20 male albino rats (weight 250-270 g). The control group underwent a sham operation, while in the second group the left testes were twisted clockwise ...

BACKGROUND: Two new blood-flow-diagnosis techniques have recently been developed as supplements to the established color techniques: the MEM (maximum entropy method) technique and color flow amplitude (power Doppler). These are capable of representing blood flow in distinctly more slowly flowing areas than is possible with the conventional Doppler technique. METHODS: ...

The aims of this study were to (1) determine whether analysis of a color Doppler energy image can show small differences in volume flow and (2) determine the performance characteristics of color Doppler energy to aid future analyses. Flow through a silicone tube in a waterbath was insonated, and the ...

PURPOSE: To determine the ability of transtemporal power- and frequency-based transcranial color-coded duplex sonography to aid in the assessment of cerebral veins and sinuses, as well as to provide reference data for flow direction and velocity. METHODS: Using a color duplex device equipped with a 2.0/2.5-MHz sector scan, we insonated ...

We describe the color Doppler sonographic features of uterine arteriovenous malformations in two cases. In both cases color Doppler imaging demonstrated hypervascularity throughout the arteriovenous malformation. The dominance of pale shades during both systole and diastole represented low-impedance, high-velocity flow within the lesion and a colored mosaic pattern representing turbulent ...

BACKGROUND: The aim of this study was to find a possible relationship between the biological behavior of carcinomas of the breast and sonographically detectable blood flow after first studies showed a correlation between blood flow and prognostic factors. METHOD: 259 patients with ductal invasive breast cancer were examined using MEM ...

Unlike conventional color Doppler imaging; color Doppler energy (or power Doppler) displays the intensity of the returning Doppler signal, is less dependent on the orientation of the blood vessel, and is therefore better able to detect low blood velocities. For these reasons it could be useful in some investigations which ...

PURPOSE: To compare power Doppler and conventional color Doppler ultrasound (US) in the detection of blood flow in the normal pediatric testis and to assess the symmetry of blood flow and the spectral Doppler tracing waveforms in the normal pediatric testis. MATERIALS AND METHODS: Testicular blood flow was assessed prospectively ...

Scrotal ultrasonography has many indications. Evaluation of testis masses, hydroceles, and extratesticular structures are the most common indications. Color Doppler ultrasound has made assessment of scrotal blood flow possible. This enables the sonographer to make specific diagnoses in cases of acute scrotal pain. Other indications include evaluating infertile men, searching ...

Using laser Doppler flowmetry, the effects of unilateral intratesticular injection of calcitonin gene-related peptide (CGRP) and CGRP8-37, a CGRP-receptor antagonist, on right- and left-testicular blood flow and mean arterial pressure were studied on anesthetized adult rats. Calcitonin gene-related peptide in doses of 5 and 50 ng increased blood flow 37 ...

The purpose of this study was to assess the utility of an intravenous contrast agent (FS069) for visualization of normal visceral perfusion compared with perfusion after segmental infarction in a canine model. Six mongrel dogs were used as subjects. Splenic, renal, hepatic, and small bowel perfusion was assessed without and ...

The present study was designed to test the predictability of color Doppler flow imaging of the bladder in determining the cause of bladder hypertrophy. The blood flow in the anterior bladder wall was measured in 35 patients with an abnormally increased ultrasound estimated bladder weight (UEBW) of more than 35.0 ...

PURPOSE: To determine whether vascular, ischemic, and inflammatory causes of bowel wall thickening in children can be differentiated at gray-scale and color Doppler ultrasonography (US). MATERIALS AND METHODS: Thirty-seven children with acute bowel disease underwent graded compression US. Findings of bowel wall thickness, wall echotexture, location of bowel involvement, and ...

A color and pulsed Doppler evaluation of 140 benign and malignant lymphnodes in 85 patients has been performed: The nodes have been classified into non-vascularized (flow-), normal-vascularized (flow +), and hypervascularized (flow +2); we also considered the presence of central or peripheral flow. Resistivity index was also measured. The only ...

The purpose of this study was to investigate the effect of use of intravenous ultrasonographic contrast agent in the diagnosis of gonadal torsion in an animal model. After examination of perfusion of normal gonads in male and female dogs, torsion was produced and maintained mechanically. Presence and pattern of blood ...

We have validated a new semiautomated method for quantification of volumetric flow applied to multiplane transesophageal color Doppler mapping. This Doppler technique assumes only the incompressibility of the fluid and includes variations of flow area. By computing velocity vectors across a surface normal to the point of scanning, volumetric flow ...

PURPOSE: To examine the effect of an ultrasound contrast medium (UCM) in the visualization of parenchymal blood flow by means of color Doppler and power Doppler sonography. MATERIAL AND METHODS: Nonenhanced and UCM-enhanced Doppler images of canine kidneys were obtained in a transversal plane during various states of flow reduction ...

The purpose of this study was to determine if the sonographic contrast agent MRX-115 could improve the accuracy of Doppler ultrasonographic diagnosis of testicular ischemia. Testicular duplex ultrasonography was performed on six dogs before and after surgical ligation of the testicular artery, and before and after intravenous injection of MRX-115. ...

The aims of this study were to assess (1) any angle dependency of color Doppler energy and (2) if computer analysis of the color can distinguish variations in volume flow. Fluid flowing through a silicon tube in a waterbath was insonated and the color in the images analyzed by a ...

PURPOSE: Previous studies have shown that experimental testicular torsion with a duration of 1 hr. or longer causes irreversible damage to the rat testis, but that testicular blood flow values are normal 24 hrs. after repair of torsion. More acute evaluation of return blood flow after repair of torsion has ...

PURPOSE: To assess whether power Doppler ultrasound (US) improves the detection of flow in normal prepubertal testes. MATERIALS AND METHODS: Seventy-two normal testes of 38 prepubertal boys (age range, 2 weeks to 12.5 years) were scanned with color and power Doppler US (7-MHz transducer). The two modalities were compared subjectively ...

BACKGROUND AND PURPOSE: Early diagnosis of cerebral transverse sinus venous thrombosis (TSVT) is difficult because of nonspecific and variable clinical presentations. Therefore, we evaluated the diagnostic value of transcranial color-coded duplex sonography (TCCS) after administration of an echocontrast-enhancing agent (cTCCS) in clinically suspected TSVT. METHODS: We examined 14 patients (6 ...

Power Doppler imaging has recently gained attention as an additional color flow imaging technique that overcomes some of the limitations of conventional color Doppler ultrasound (US). Limitations of conventional color Doppler US include angle dependence, aliasing, and difficulty in separating background noise from true flow in slow-flow states. Owing to ...

OBJECTIVE: The purposes of this investigation were to compare prospectively the pattern and extent of cystic artery flow revealed by power Doppler sonography and color Doppler sonography in patients with normal gallbladders and to analyze the potential implications of these findings for power Doppler sonography in diagnosing acute cholecystitis. SUBJECTS ...

OBJECTIVE: To determine the efficacy of DNA flow cytometric analysis of testicular percutaneous fine-needle aspirates in the assessment and follow-up of testicular function after torsion, and to determine the relationship between the duration of torsion and testicular injury. MATERIALS AND METHODS: Three groups of 15 adult rats underwent a 720 ...

Our objective was to assess postoperative ureteral patency in gynecologic oncology patients with color Doppler flow ultrasonographic assessment of ureteral jets. Forty-five consecutive gynecologic oncology patients meeting inclusion criteria prospectively underwent postoperative transabdominal color Doppler flow ultrasonographic assessment of ureteral jets to establish patency; 48 consecutive women undergoing transabdominal ultrasonographic ...

Color Doppler ultrasonography was performed in 125 patients with 134 intussusceptions. Color flow was present in 121 cases of intussusception (group A) and was absent in 13 cases (group B). Young age and duration of symptoms greater than 48 hr were significantly related to the nonvisualization of blood flow detected ...

In the patient described, brachial plexopathy was caused by a large anticoagulant-induced hematoma and pseudoaneurysm. The patient was seen at the hospital 2 weeks postarteriography with weakness, numbness, and pain in the left arm, as well as diffuse left-sided ecchymosis. Noncontrast computed tomographic scans of the axilla confirmed the diagnosis ...

PURPOSE: To investigate at which age testicular blood flow can be demonstrated consistently by color Doppler sonography and power Doppler sonography. MATERIALS AND METHODS: In this prospective study, 172 normal testes of 86 boys (age range, 4 days to 15 years) were examined with gray-scale ultrasound, color Doppler sonography, and ...

Endothelin-1 (ET-1) is a potent vasoconstrictor peptide produced by vascular endothelin cells There are reports in the literature that ET-1 plasma levels are raised in low tension glaucoma (LTG). ET-1 plasma concentration and Color Doppler Imaging (CDI) evaluation in ophthalmic and posterior ciliary arteries were measured in 15 LTG patients ...

The aim of this study was to evaluate the changes in volume, structure, and flow pattern of parathyroid glands in uremic patients with secondary hyperparathyroidism treated with long-term intravenous calcitriol (CTL) therapy. Ultrasonography was used to follow-up volume changes occurring in 18 enlarged glands in 11 patients during an 18-month ...

Color flow mapping systems have become widely used in the short time since their development. These systems overlay a pseudo-color velocity map upon the gray-scale two-dimensional image. Between 4 and 16 pulses are directed to each line-of-sight, and this requirement reduces the frame rate in comparison with the gray-scale image. ...

By use of color Doppler Flow Imaging (CDFI), the morphologic and hemodynamic parameters such as the diameters of femoral and popliteal veins, blood flow velocity and the reflux of valve area were examined in lower extremity deep valvular incompetence (DVI) and normal control groups. The purpose was to evaluate the ...

Assessment of regurgitant flow by the flow convergence method is based on reading absolute velocities from color Doppler maps. Velocity overestimation by high pass filtering above 100 Hz has been reported. An extremely low filter, however, is impracticable in patients. A ratio of pulse repetition frequency (PRF)/filter of 10/1 usually ...

Forty-three men underwent varicocele scintigraphy to exclude underlying varicocele as a possible cause of decreased semen quality. The total acquisition time for each study amounted to as little as 200 seconds. In four cases retrograde blood flow was seen in the left internal spermatic vein, with subsequent clear visualization of ...

PURPOSE: To compare power Doppler ultrasound (US) with conventional color Doppler US for the assessment of tumor vascularity in hepatocellular carcinoma (HCC). MATERIALS AND METHODS: Fifty-one patients with 88 histologically proved HCCs were examined with power and color Doppler US according to a standardized examination protocol. Findings at Doppler studies ...

PURPOSE: To evaluate a perfluorochemical stabilized microbubble-based ultrasound (US) contrast agent (Imagent US, formulation AF0145) create regional cerebral blood flow (CBF) maps. MATERIALS AND METHODS: Intravenous injections of the contrast agent (0.16-0.20 mL/kg) were performed in four anesthetized dogs (9-14 kg). Serial coronal color-Doppler-amplitude and gray-scale US scans were obtained ...

Color flow doppler sonography (CFDS) is a powerful technique which displays tissue blood flow and vascularity. Hyperthyroidism due to Graves' disease is characterized by variable degrees of increased blood flow at CFDS. The purpose of this study was to evaluate CFDS patterns in five women with thyrotoxicosis factitia, a condition ...

Small hepatic nodular lesions are frequently detected by ultrasonography in patients with liver cirrhosis during follow-up. However, hepatocellular carcinomas (HCCs) and non-HCC nodules are difficult to differentiate by ultrasonography because they have a similar appearance. We used color Doppler ultrasonography (CDU) to examine 29 HCCs and 26 non-HCC nodules less ...

Central nervous system involvement in neonatal lupus erythematosus (NLE) has not been previously reported. We report four patients with NLE, all with complete congenital heart block and three with cerebral ultrasound and color Doppler flow imaging (CDFI) studies demonstrating evidence of associated vasculopathy in the gangliothalamic vasculature. CDFI confirmed blood ...