Color transcranial “power” Doppler ultrasound of intracranial aneurysms

1996 ◽  
Vol 84 (3) ◽  
pp. 459-461 ◽  
Author(s):  
Joanna M. Wardlaw ◽  
James C. Cannon
Keyword(s):  
Doppler Ultrasound ◽  
Intracranial Aneurysms ◽  
Flow Direction ◽  
Color Doppler ◽  
Power Doppler ◽  
Color Doppler Imaging ◽  
Color Doppler Ultrasound ◽  
Doppler Imaging ◽  
Ultrasound Technique ◽  
Content Type

✓ “Color Doppler energy” (or “power Doppler”), a new color Doppler ultrasound technique that is independent of flow direction and very sensitive to movement, was assessed for its use in the identification of intracranial aneurysms in patients with recent subarachnoid hemorrhage immediately prior to using cerebral angiography. Features that identified aneurysms using this technique included the appearance of abnormal color where no normal artery was expected, abnormal bulging of an artery, and greater “expansibility” of the aneurysm in comparison to an adjacent normal vessel. In this exploratory study, 30 of 33 aneurysms were correctly identified in 35 patients with a good bone window. Color Doppler energy is considerably more sensitive to intracranial blood flow than conventional color Doppler imaging. Color Doppler energy is a useful research tool; if these preliminary results are verified in larger series, in addition to examination for vasospasm, the technique could be used for identification and follow up of aneurysms.

Evaluation of breast tumors with color Doppler imaging: A comparison with image-directed Doppler ultrasound

1995 ◽  
Vol 23 (6) ◽  
pp. 367-373 ◽  
Author(s):  
San-Kan Lee ◽  
Tain Lee ◽  
Kuan-Rong Lee ◽  
Yeou-Gie Su ◽  
Tse-Jia Liu
Keyword(s):  
Doppler Ultrasound ◽  
Color Doppler ◽  
Color Doppler Imaging ◽  
Breast Tumors ◽  
Doppler Imaging

Placental Blood Flow by Three-dimensional Doppler Ultrasound

2016 ◽  
Vol 10 (1) ◽  
pp. 55-62 ◽  
Author(s):  
Ivica Zalud
Keyword(s):  
Blood Flow ◽  
Doppler Ultrasound ◽  
Color Doppler ◽  
Rapid Development ◽  
Three Dimensional ◽  
Color Doppler Ultrasound ◽  
Clinical Applications ◽  
Ultrasound Technique ◽  
Placental Blood ◽  
Placental Blood Flow

ABSTRACT This review aims to provide the reader with an overview of the potential clinical applications in three-dimensional (3D) Doppler ultrasound for the evaluation of vascularity and blood flow within the placenta. Significant innovations have recently occurred, improving the visualization and evaluation of placental vascularity, resulting from enhancements in delineation of tissue detail through electronic compounding and harmonics, as well as enhancements in signal processing of frequencyand/ or amplitude-based color Doppler ultrasound. Spatial representation of vascularity can be improved by utilizing 3D processing. Greater sensitivity of 3D Doppler ultrasound to macro- and microvascular flow has provided improved anatomical and physiologic assessment throughout pregnancy. The rapid development of these new sonographic techniques will continue to enlarge the scope of clinical applications in placental studies. Three-dimensional Doppler sonography is a unique ultrasound technique that enables assessment of vascular signals within the whole investigated area. Homodynamic changes included in the process of placentation are one of the most exciting topics in the investigation of early human development. How to cite this article Zalud I. Placental Blood Flow by Threedimensional Doppler Ultrasound. Donald School J Ultrasound Obstet Gynecol 2016;10(1):55-62.

scholarly journals The Practice of Using Contrast Sonography for the Differential Diagnosis of Liver Neoplasms

2017 ◽  
pp. 13-19 ◽  
Author(s):  
Z. A. Agaeva ◽  
T. S. Avhadov ◽  
L. V. Gorbov ◽  
E. N. Karanadze
Keyword(s):  
Colorectal Cancer ◽  
Contrast Agent ◽  
Liver Neoplasms ◽  
Color Doppler ◽  
Power Doppler ◽  
Color Doppler Imaging ◽  
Doppler Imaging ◽  
Group I ◽  
Group Ii ◽  
Benign Liver

Purpose: to improve the differential diagnosis of benign liver rumors and the liver metastasis of colorectal cancer with the ultrasound using contrast sonography.Materials and methods.There were evaluated 92 patients with liver neoplasms (44 (47.8%) women and 48 (52.2%) men) age 41 to 83, with a mean age of 62.8 ± 2.64. Ultrasound exam was carried out in three stages: I stage – liver ultrasound in B-mode, II stage – ultrasound in B-mode with addition of color Doppler imaging and power Doppler scanning, III stage – contrast liver sonography employing the contrast agent SonoVue (Bracco Imaging SpA, Milan, Italy). According to the results of the examination the patients were either surgically treated if there were indications, or the nature of the neoplasm was verified via the needle biopsy. Thus the patients formed two groups: I group (n = 35 (38.0%) – patients with benign liver neoplasms: cavernous hemangiomas – 17, hepatocellular adenomas – 3, focal modular hyperplasia of the liver – 5; II group (n = 57 (62.0%) – patients with metastasis of colorectal cancer.Results.With the use of the ultrasound in B-mode with addition of color Doppler imaging and power Doppler scanning in patients from group I (n = 35) with benign tumors of the liver – bilobar involvement in 2 cases, right lobe involvement in 28 cases, left lobe involvement in 5 cases. There were found both solitary (in 33 cases) and multiple (in 2 cases) neoplasms ranging from 2.5– 4.5 cm to conglomerates of 8–17 cm in diameter. In group II (n = 57), in patients with colorectal cancer metastasis who had an ultrasound examination in B-mode with addition of color Doppler imaging and power Doppler scanning, bilobar metastatic (91.2%) involvement of the liver prevailed over the monolobar, notably right lobe (84.21%) involvement was more frequent. Multiple metastasis were encountered more often (89.5%) then solitary. At the moment of metastatic liver disease discovery the size of the tumor nodules was over 5 cm in diameter in 33 (57.8%) patients. According to the results of contrast sonography in patients of group I (n = 35) with benign tumors of the liver, there was detected a prolonged enhancement of the neoplasm in the arterial, portal and delayed phases of enhancement. In patients of group II (n = 57) with metastasis of colorectal cancer to the liver, in the end of arterial phase there was noted a “washing out” of the contrast agent by 16th second – in 36 (63.1%) of the patients, by 23th se cond – in 17 (29.8%) and by the 26th second – in 4 (7.0%) of the patients. In portal and delayed phase of the enhancement all of the group II patients (100%) at the site of the metastasis there were located anechogenic round foci.Conclusions. 1. Complex 3-stage ultrasound examination (B-mode, color Doppler imaging and power Doppler scanning, contrast sonography) of the liver neoplasms allows to get a more detailed information and differentiate benign and metastatic disease of the liver; 2. During contrast sonography the benign liver tumors “keep” the contrast gent during the arterial, portal and delayed enhancement phases, but with metastasis in liver the contrast agent gets “washed out” already in the arterial phase of enhancement.

Color Doppler and Microvascular Flow Imaging to Evaluate the Degree of Inflammation in a Case of Hidradenitis Suppurativa

2022 ◽  
pp. 154431672110664
Author(s):  
Mariateresa Rumolo ◽  
Marika Santarsiere ◽  
Biagio Francesco Menna ◽  
Rocco Minelli ◽  
Emilia Vergara ◽  
...  
Keyword(s):  
Hidradenitis Suppurativa ◽  
Color Doppler ◽  
Color Doppler Imaging ◽  
Doppler Imaging ◽  
Flow Imaging ◽  
Ultrasound Technique ◽  
Microvascular Flow ◽  
Small Vessels ◽  
Female Smoker ◽  
Microvascular Architecture

Microvascular Flow Imaging is a new ultrasound technique with better ability than Color Doppler Imaging to identify small vessels that have slow blood flow, and it permits better evaluation of the features, especially microvascular architecture, of various lesions. We describe a case of inguinal hidradenitis suppurativa in a patient with positive risk factors (young age, female, smoker, and obese), diagnosed by ultrasonography using B-Mode, Color Doppler, and finally also with Microvascular Flow Imaging. Our aim is to demonstrate the usefulness of this new technique in characterization of lesions.

Hemodynamic Changes in the Head and Neck after Ligation of the Unilateral Carotid Arteries: A Study Using Color Doppler Imaging

1994 ◽  
Vol 103 (1) ◽  
pp. 41-45 ◽  
Author(s):  
Yousuke Takeuchi ◽  
Haruhiko Suzuki ◽  
Tsutomu Numata ◽  
Takeshi Hino ◽  
Akiyoshi Konno ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Flow Direction ◽  
Color Doppler ◽  
Color Doppler Imaging ◽  
External Carotid Artery ◽  
Doppler Imaging ◽  
External Carotid ◽  
Occipital Artery ◽  
Artery Ligation ◽  
Collateral Pathway

For evaluation of the hemodynamics of the collateral circulation to the ligated external carotid artery (ECA) region, we measured the blood flow direction and volume in branches of the ECA in patients with unilateral carotid artery ligation before and during digital suppression of the common carotid artery (CCA) on the ligated and nonligated sides with color Doppler imaging and angiography. The main collateral pathway to the ligated ECA region was the ipsilateral occipital artery through Richter's anastomosis from the vertebral artery in the case of unilateral ECA ligation, and was the contralateral carotid artery in the case of unilateral CCA, ECA, and internal carotid artery resection. The superior and inferior labial arteries were important as the collateral pathway from the contralateral ECA.

scholarly journals Evaluation of Corpus Luteum Vascularization in Recipient Mares by Using Color Doppler Ultrasound

2021 ◽  
Vol 49 ◽  
Author(s):  
Marlon De Vasconcelos Azevedo ◽  
Natália Matos Souza ◽  
Felipe Augusto Boudoux Martins Sales ◽  
José Carlos Ferreira-Silva ◽  
Maiana Silva Chaves ◽  
...  
Keyword(s):  
Corpus Luteum ◽  
Embryo Transfer ◽  
Doppler Ultrasound ◽  
Color Doppler ◽  
Color Doppler Ultrasound ◽  
Doppler Imaging ◽  
Panicum Maximum ◽  
Progesterone Concentration ◽  
Vascular Perfusion ◽  
Significant Difference

Background: Embryo transfer is one of the most commonly used reproductive biotechnique. The success of embryo transfer is also affected by the synchrony of estrus and ovulation between donor and recipient animals. In horse reproduction, ultrasonography has been used, among other purposes, to diagnose early pregnancy. However, only the color Doppler imaging mode makes it possible to evaluate the vascular architecture and the hemodynamic aspects of the vessels in several organs, especially the corpus luteum. The objective of this study was to evaluate, based on the color Doppler ultrasound, the corpus luteum vascularization and function from recipient mares at embryo transfer timing.Materials, Methods & Results: Mangalarga Machador mares from 5 to 10-year-old and a range of live weights of between 350 to 450 kg were used for this experiment, kept in pasture-based on mombaça grass (Panicum maximum) and were given ad libitum access to water and mineral supplementation. The animals (n = 15) were gynecologically examined and uterine consistency was evaluated by rectal palpation the same operator using an ultrasound system (SonoScape®) with a linear transducer, and operating frequency ranging from 5 to 10 Mhz. The uterine tone was classified between grades 1 and 4 and subjected to ovulation induction. The objective and subjective vascular perfusion of the corpus luteum was evaluated by color Doppler ultrasound on the day of embryo transfer and endometrium. The determination progesterone concentration on the day of the embryo transfer was performed by direct chemiluminescence assay. The arcsine (√P/100) transformation was applied to the percentage data, and the results were expressed as mean (.) ± standard error of the mean (SEM). Further, the assumptions of normality and homoscedasticity were verified, respectively, based on the Shapiro-Wilk and Lilliefors tests. Regarding the parametric and non-parametric variables, were applied, respectively, analysis of variance (ANOVA) followed by Tukey’s test, and the Kruskal-Wallis test followed by Dunn’s test. Pearson’s correlation coefficient was used to evaluate the relationship between the parameters. The statistical program SPSS 16.0 was used to perform the over-mentioned analyses, and a p-value < 0.05 was taken as significant. Corpus luteum vascular perfusion, based on the objective and subjective evaluation methods, and the progesterone concentration were higher in the pregnant mares (P < 0.05). The objective and subjective methods for evaluation of the vascular perfusion in the corpus luteum were positively correlated between themselves as well as to progesterone concentration (P < 0.05). There was no significant difference between the groups considering the uterine tonus evaluation (P > 0.05).Discussion: Mares that later became pregnant showed a higher concentration of progesterone as an outcome of the higher vascularization in the corpus luteum. It can be supported by both the correlation between the progesterone concentration and the corpus luteum vascular perfusion, as well as by the higher values of the vascular perfusion in pregnant mares. Based on the results, it has been concluded that the color Doppler ultrasound evaluation is an accurate tool to determine the corpus luteum vascularization, whether considering the objective or subjective methods. Also, the vascular perfusion is the most efficient parameter to determine both the corpus luteum function and to predict the ability of the recipient mares to maintain pregnancy.

scholarly journals Prenatal Diagnosis of Morbidly Adherent Placenta with 2D Ultrasonography, 3D Color Power Doppler and Magnetic Resonance Imaging

2010 ◽  
Vol 4 (2) ◽  
pp. 199-204
Author(s):  
Sawsan Al Obaidly
Keyword(s):  
Placenta Previa ◽  
Color Doppler ◽  
Power Doppler ◽  
Color Doppler Imaging ◽  
3D Ultrasound ◽  
Massive Hemorrhage ◽  
Uterine Wall ◽  
Doppler Imaging ◽  
Additional Information ◽  
2D Ultrasound

Abstract The incidence of placenta accreta/percreta should rise steadily over the next century as the frequency of cesarean sections and advanced maternal age, both independent risk factors, increases. Patients who are at risk should be identified. The diagnosis of placenta previa accreta/percreta is possible by using gray-scale sonography, conventional color Doppler imaging and MRI through studying the relation of placenta to the uterine wall and nearby pelvic structures. The potentially new modality of 3D and 3D color power Doppler ultrasound has it's value as a tool to achieve significantly increased diagnostic accuracy in the prediction of massive hemorrhage by assessing the extent, location and quantification of abnormal uteroplacental neovascularization. Hence, 3D ultrasound has the potential for providing additional information over conventional 2D ultrasound studies in the diagnosis of placenta previa percreta. The diagnosis and anticipation of the problem achieve the best results for the obstetrician and the patient.

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